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  • System 814

    User Manual

    LarsonDavis Inc.1681 West 820 North

    Provo, UT 84601-1341Phone: (801) 375-0177FAX: (801) 375-0182

    www.lardav.com

    P/N: I814.01

  • SYSTEM 814 USER MANUAL

    ii

    Copyright

    Copyright 1997 by LarsonDavis, Incorporated. This manual and the software described init are copyrighted, with all rights reserved. The software may not be copied in whole or inpart for commercial use without prior written consent of LarsonDavis Inc. The manual maynot be copInc.

    The follownot agreea

    Even thouLarsonDimplied, wchantabilitwithout nsonDavis

    This publiperiodicalto the prog

    Please exaasked to gInc.ied in whole or in part for any use without prior written consent of LarsonDavis

    Disclaimer

    ing paragraph does not apply in any state or country where such statements areble with local law:

    gh LarsonDavis, Inc. has tested the software and reviewed its documentation,avis Incorporated makes no warranty or representation, either expressed or

    ith respect to this software and documentation, its quality, performance, mer-y, or tness for a particular purpose. This documentation is subject to changeotice, and should not be construed as a commitment or representation by Lar- Inc.

    cation may contain inaccuracies or typographical errors. LarsonDavis Inc. willly update the material for inclusion in new editions. Changes and improvementsram described in this manual may be made at any time.

    mine your instrument and record the following information below. You may beive this information in any future communications you have with LarsonDavis,

    System 814 Serial # ______________________Microphone Model ______________________Microphone Serial # _____________________

  • System 814 USER MANUAL

    ii

    T

    Tools Key ........................................................................................... 2-16About .................................................................................................. 2-18Calibration.......................................................................................... 2-19Clock/Timer ...................................................................................... 2-21

    Chapter

    Chapter

    Memory .............................................................................................. 2-23Lock..................................................................................................... 2-25Power Monitor................................................................................... 2-25Communication................................................................................. 2-26P Print Key ........................................................................................... 2-27

    3 OBA Octave Band Analyzer 3-1Setting up the OBA ................................................................................. 3-2

    Available Settings................................................................................ 3-3Title Setting .......................................................................................... 3-4OBA ScanMode Setting ...................................................................... 3-5OBA Prole Setting ............................................................................. 3-6OBA Bandwidth Setting..................................................................... 3-7Range Setting ....................................................................................... 3-7Transducer Setting .............................................................................. 3-8Intv Enable Setting.............................................................................. 3-8Intv Period Setting .............................................................................. 3-9Intv Time Sync Setting........................................................................ 3-9Intv Auto Stop Setting ...................................................................... 3-10AC Out Weight Setting..................................................................... 3-10

    Understanding OBA Displays............................................................. 3-11Available OBA Displays ................................................................... 3-13Live...................................................................................................... 3-14Current................................................................................................ 3-16OverAll ............................................................................................... 3-18Interval History ................................................................................. 3-20Run Log .............................................................................................. 3-22

    Using the OBA ....................................................................................... 3-23Simple OBA Scan............................................................................... 3-23

    4 sSLM-simple Sound Level Meter 4-1Introduction to the Simple SLM Mode................................................. 4-1Selecting the permanent Simple SLM setup........................................ 4-2

  • System 814 USER MANUAL

    Utilizing the Simple SLM setup when it is the active setup ......... 4-3Editing the Simple SLM setup............................................................... 4-4

    Quick Keys ........................................................................................... 4-4Editing Using the Setup Menu.......................................................... 4-7

    Chapter

    iii

    sSLM Settings Menu........................................................................... 4-9Detector Setting ........................................................................................4-10Weighting Setting.....................................................................................4-10Range Setting ............................................................................................4-11Transducer Setting ...................................................................................4-11Pk-I Weighting Setting.............................................................................4-12Current Exchange Setting........................................................................4-12Current Threshold Setting.......................................................................4-13

    Controls Settings Menu.................................................................... 4-14AC Out Filter Setting ...............................................................................4-14Logic Input Setting ...................................................................................4-15Output 1 Logic Setting.............................................................................4-16Output 1 Timer Setting............................................................................4-18

    Check Menu....................................................................................... 4-18Graph Menu ..............................................................................................4-19Settings.......................................................................................................4-20Controls......................................................................................................4-20

    Understanding sSLM Displays............................................................ 4-20Available sSLM Displays ................................................................. 4-23SLM ..................................................................................................... 4-23SnapShot............................................................................................. 4-25

    Using the sSLM...................................................................................... 4-26Simple sSLM Scan ............................................................................. 4-27

    5 SLM-Logging Sound Level Meter 5-1Setting up the SLM................................................................................. 5-2

    Title Setting .......................................................................................... 5-4SLM Settings Menu............................................................................. 5-4

    Detector Setting ..........................................................................................5-5Weighting Setting.......................................................................................5-5Range Setting ..............................................................................................5-6Transducer Setting .....................................................................................5-6Pk-I Weighting Setting...............................................................................5-7OBA Filter....................................................................................................5-7

  • System 814 USER MANUAL

    iv

    TWA Menu ........................................................................................... 5-8

    Overall Exchange Setting ..........................................................................5-8Overall Threshold Setting .........................................................................5-9Overall Criterion Level Setting.................................................................5-9

    Current Exchange Setting........................................................................5-10Current Threshold Setting.......................................................................5-10Current Criterion Level Setting..............................................................5-11

    LN Menu ............................................................................................. 5-11Triggering Menu................................................................................ 5-12

    SPL Trigger Level 1 Setting.....................................................................5-13SPL Trigger Level 2 Setting.....................................................................5-13Peak I Trigger Level Setting....................................................................5-14Peak II Trigger Level Setting ..................................................................5-14Hysteresis Setting .....................................................................................5-14

    Time History Menu........................................................................... 5-15History Enable Setting .............................................................................5-15Hist Period Setting ...................................................................................5-16Period Units Setting .................................................................................5-16Other Level Setting...................................................................................5-17Resolution Setting.....................................................................................5-17

    Intervals Menu .................................................................................. 5-17Interval Period Setting .............................................................................5-19Interval Sync Enable Setting ...................................................................5-19Interval LN Enable Setting.......................................................................5-19Interval Auto-Stop Enable Setting .........................................................5-20Interval Threshold Setting.......................................................................5-20Interval Exchange Rate Setting...............................................................5-20

    Dene Report Menu ......................................................................... 5-21Data Report Setting ..................................................................................5-22SPL Histogram Report Setting................................................................5-22Pk-I Histogram Setting ............................................................................5-22Pk-II Histogram Setting...........................................................................5-22Intv Report Setting ...................................................................................5-22Hist Report Setting ...................................................................................5-23

    Controls Settings Menu.................................................................... 5-23AC Out Filter Setting ...............................................................................5-24Logic Input Setting ...................................................................................5-24Logic Output Setting................................................................................5-25

  • System 814 USER MANUAL

    Logic Output Timer Setting ....................................................................5-27

    Check Menus ..................................................................................... 5-28Graph Menu....................................................................................... 5-29

    Graph Level...............................................................................................5-29

    Chapter

    Chapter

    v

    Graph Scale................................................................................................5-29Settings.......................................................................................................5-30TWA ...........................................................................................................5-30

    Understanding SLM Displays ............................................................ 5-30Available SLM Displays .........................................................................5-32Current / Overall -a SLM Displays .......................................................5-34Current / Overall -b SLM Display.........................................................5-35Current /Overall -c SLM Displays ........................................................5-36Current / Overall -d SLM Displays.......................................................5-37Current / Overall - e SLM Displays ......................................................5-38Exposure-a Display ..................................................................................5-39Exposure-b Display..................................................................................5-40Ln-a Display ..............................................................................................5-41Ln-b Display..............................................................................................5-42Stats-a Display ..........................................................................................5-43Stats-b Display ..........................................................................................5-44Stats-c Display...........................................................................................5-45LDL Display ..............................................................................................5-46

    Using the SLM ...................................................................................... 5-48Simple SLM Scan .....................................................................................5-48

    6 Printing Reports from the 814 6-1Connecting the 814 to a Serial Printer .................................................. 6-1Printing Normal SLM Reports .............................................................. 6-2

    Dening and Printing Tailored Reports........................................... 6-4Using the Recall Format..................................................................... 6-7

    Default Settings Values for the Recall Format Reports.........................6-8Printing a Custom Report ................................................................ 6-15

    Printing Simple SSM Reports .............................................................. 6-16Printing Octave OBA Reports ............................................................. 6-17

    7 Using the 814 Utility Software 7-1Connecting the 814 to Your Computer ................................................ 7-1814 Utility Installation ............................................................................ 7-2

  • System 814 USER MANUAL

    vi

    Starting the 814 Utility Software ........................................................... 7-2814 Setups ................................................................................................. 7-3

    Modifying and Uploading Setups to the 814 .................................. 7-4Saving Setups to Disk Files................................................................ 7-5

    App. A

    App. B

    App. C

    Opening Setup Disk Files................................................................... 7-6Creating a New Setup......................................................................... 7-7

    Downloading Measurement Data......................................................... 7-7Translating Measurement Data from a Downloaded File............. 7-9Viewing a Translated File Within a Spreadsheet Program.......... 7-10

    System Layout A-1System Menus .........................................................................................A-1

    Octave Band Analyzer.......................................................................A-2Simple Sound Level Meter................................................................A-3Logging SLM System Menus ...........................................................A-5

    System Displays....................................................................................A-10Octave Band Analyzer.....................................................................A-10Simple Sound Level Meter.............................................................. A-11Logging Sound Level Meter ........................................................... A-11

    Integrated Level Calculations B-1

    Serial Port Interface Remote Control C-1Interface Cables....................................................................................... C-2Daisy Chain Addressing ....................................................................... C-3

    814 Network, Addressing Commands............................................ C-3Commands .............................................................................................. C-4

    History Oriented Commands........................................................... C-5Locating History Records.........................................................................C-6

    Control Oriented Commands........................................................... C-7Remote Control Commands (Detailed)............................................... C-7

    Mode Commands............................................................................... C-7Read Command (Reads out data variables)............................... C-8Other Read Commands................................................................... C-19Group Read Programming ............................................................. C-19

    Settings................................................................................................... C-20Querying Settings ............................................................................ C-21

  • System 814 USER MANUAL

    Entering Settings .............................................................................. C-22

    Option Settings ........................................................................................C-22Numeric Settings .....................................................................................C-23Character String Settings........................................................................C-23

    vii

    Template Settings ....................................................................................C-23Setting List ............................................................................................. C-25

    Histogram Reports........................................................................... C-29Tailored Report ........................................................................................C-30Miscellaneous...........................................................................................C-30

    Error Checking I/O ......................................................................... C-33History Records .................................................................................... C-35

    Types of History ......................................................................................C-35Advance ....................................................................................................C-35Backup.......................................................................................................C-36Find............................................................................................................C-36

    History Data Variables ........................................................................ C-36Exceedance History Variables ........................................................ C-36Interval History Variables............................................................... C-38Daily History Variables - (D1-D102)............................................. C-41Run Log Variables ............................................................................ C-42Calibration History Variables......................................................... C-42Time History Variables (Logging SLM) ........................................ C-43Histogram Table Variables.............................................................. C-43

    Print Commands................................................................................... C-44Error Messages and Warnings ........................................................... C-45Modem Control Mode ......................................................................... C-47

    Modem Mode (154).......................................................................... C-48Dial Out Mode (155) ........................................................................ C-48Monitor Number .............................................................................. C-48814 Phone Dialing Procedure ......................................................... C-49Model 814 Answering Procedure .................................................. C-50

    Unsupported Miscellaneous Commands ......................................... C-50Data File Commands ........................................................................... C-51

    Name restrictions & conventions for IDs (Instrument Denitions) .C-52Instrument Denition (ID) commands ......................................... C-53Sending Binary Data to the 814...................................................... C-54

  • System 814 USER MANUAL

    viii

    Data Block format....................................................................................C-55

    ID upload .......................................................................................... C-56

    ID Structures ............................................................................................C-56

    Receiving binary data from the 814 ................................................... C-57

    App. D

    App. E

    &S1 Set Calibration Block command ......................................... C-58&S2 Set System Settings Block command................................... C-58&S3 Set Measurement Settings Block......................................... C-59

    Keyboard Simulation ........................................................................... C-59Creating Bitmap of 814 Screen............................................................ C-60Operation Notes ................................................................................... C-60

    Technical Specifications D-1

    Glossary E-1Allowed Exposure Time (Ti).................................................................... E-1Average Sound Level (Lavg) ................................................................... E-1Calibration .................................................................................................. E-2Community Noise Equivalent Level (CNEL, Lden) ............................ E-2Criterion Duration (Tc) ............................................................................. E-2Criterion Sound Exposure (CSE)............................................................. E-3Criterion Sound Level (Lc)....................................................................... E-3Daily Personal Noise Exposure (LEP,d)................................................. E-3Day-Night Average Sound Level (DNL, Ldn) ...................................... E-3Decibel (dB) ................................................................................................ E-4Department of Defense Level (LDOD)................................................... E-5Dose ............................................................................................................. E-5Detector....................................................................................................... E-5Eight Hour Time-Weighted Average Sound Level (L TWA(8))......... E-5Energy Equivalent Sound Level (Leq).................................................... E-5Exchange Rate (Q), Exchange Rate Factor (q), Exposure Factor (k)... E-6Far Field ...................................................................................................... E-6Free Field .................................................................................................... E-7Frequency (Hz, rad/sec) .......................................................................... E-7Frequency Band Pass Filter ...................................................................... E-7Frequency Filter - Weighted .................................................................... E-8Leq ............................................................................................................... E-9Level (dB).................................................................................................... E-9Measurement Duration (T) .................................................................... E-10Microphone Guidelines .......................................................................... E-10

  • System 814 USER MANUAL

    Near Field ................................................................................................. E-12Noise.......................................................................................................... E-13Noise Dose (D) ......................................................................................... E-13Noise Exposure........................................................................................ E-14OSHA Level (LOSHA)............................................................................ E-14

    Indexix

    Preamplifier.............................................................................................. E-14Projected Noise Dose .............................................................................. E-14Single Event Noise Exposure Level (SENEL, LAX) ........................... E-14Sound ........................................................................................................ E-14Sound Exposure (SE)............................................................................... E-15Sound Exposure Level (SEL, LET) ........................................................ E-15Sound Pressure ........................................................................................ E-16Sound Pressure Level (SPL, Lp) ............................................................ E-17Sound Power(W) ..................................................................................... E-18Sound Power Level (PWL, Lw) ............................................................. E-18Sound Speed, (c,) ..................................................................................... E-19Spectrum (Frequency Spectrum)........................................................... E-19Threshold Sound Level (Lt) ................................................................... E-19Time Weighted Average Sound Level (TWA, LTWA(TC)) .............. E-19Time Weighting ....................................................................................... E-19Vibration ................................................................................................... E-20Wavelength (l).......................................................................................... E-20Wavenumber (k)...................................................................................... E-20Yearly Average Sound Level (YDNL, Lydn)....................................... E-20

  • System 814 USER MANUAL

    x

  • 1/23/98

    C H A P T E R

    1

    Introduction

    About

    Introduction 1-1

    Welcome to the LarsonDavis System 814. This versa-tile instrument, with graphic display, performs thefunctions of several instruments. It is a simple pointand shoot Sound Level Meter (SLM), an integratingSLM with data logging, and an Octave Band Analyzer(OBA) with automatic scanning. Although many usersdiscover the features and operation of the System 814by glancing at its keypad, we invite you to read thismanual to get the most out of your new LarsonDavissound level meter.

    This Manual

    This manual has 5 chapters and 3 appendices coveringthe following topics:

    Chapters

    Chapter 1 - Introduction: overview of this usermanual and the System 814s features, functionsand measurement capabilities; unpacking the Sys-tem 814; quick start procedures.

    Chapter 2- Reference: overall system setup; descrip-tion of each key along with its function and dis-plays; working with menus.

    Chapter 3- OBA (octave band analyzer): Setting up,viewing displays, and using the OBA.

    Chapter 4- sSLM (simple sound level meter): Set-ting up, viewing displays, and using the sSLM.

  • 1-2

    Chapter 5-

    SLM (data logging sound level meter):Setting up, viewing displays, and using the

    SLM.

    Appendices

    About

    Forma

    System 814 User Manual 1/23/98

    Appendix A - System Layout: layout of instrumentmenus and displays.

    Appendix B - Integrated Level Calculations: basicand SEL calculations, dose and projected dose cal-culations.

    Appendix C- Technical Specications: listing ofacoustic, electronic, environmental, and physicalcharacteristics of the System 814.

    This Chapter

    Specically, this introductory chapter covers the fol-lowing topics:

    Formatting Conventions: explanation of the fontsand other formatting conventions used in this man-ual.

    Features: overview of the System 814 keypad, func-tions and measurement capabilities.

    Getting Started: instructions for unpacking, inspect-ing and initially assembling the System 814.

    tting Conventions

    This manual uses the following format conventions:

    In step-by-step directions, the process (what you do) isshown in the left column, and the rationale (why youdo it) with other cautions and comments are shown inthe right column.

  • 1/23/98

    Featur

    Introduction 1-3

    Information or messages that are shown on the System814s LCD display are shown in a bold sans serif font.For example:

    Keys to press on the System 814 are shown in a fontrepresenting the appropriate key. For example:

    Items that appear in various on-screen menus (such assettings) are shown in an italicized font. For example:

    es

    The LarsonDavis System 814 has the following fea-tures: general, OBA, simple SLM, and logging SLM.

    General

    Large backlit true bitmapped graphics display

    Soft rubber backlit keys

    Pop-up menus with scroll bars

    Pick and choose setup...just click and run!

    as indicated by a Calculating status message.

    Press the v key

    Detector [Slow]

  • 1-4

    Three instruments in one: simple sound level meter,octave band analyzer, and data logging sound levelmeter

    File management system (stores multiple measure-System 814 User Manual 1/23/98

    ments)

    Type 1 precision integrating sound level meter (sat-ises IEC 651-1979, 804-1985, draft standard IEC1672 and ANSI S1.4 1983) with optional integrated,autoscanned 1/1 and 1/3 octave lters

    Exceptionally large dynamic range (up to 110 dB)

    Slow, Fast, and Impulse RMS detectors

    Dual Peak detectors

    Standard memory (256 KB) sufcient to store:- 6,564 1/1 octave spectra- 3,200 1/3 octave spectra- 5,688 simple SLM snapshots- 7,529 intervals without Ln- 4,923 intervals with Ln- 240,000 point time history

    Optional memory:- 512 KB (814 OPT-90 - .5)- 1.25 MB (814 OPT-90 - 1)- 2.0 MB (814 OPT-90 - 2)

    AC output with gain control: -6 to +20 dB

    DC output

    Flash memory for in-eld rmware upgrades

    Environmentally friendly low power usage batterywith life up to 40 hours

    Multi-tasking real-time operating system: continueto measure while viewing, transferring, or printingdata

    RS-422 serial interface (serial bit rate to 115 Kbps)

    Direct report printouts

  • 1/23/98

    WindowsTM-based software included for setup, con-trol, and high speed data downloading and transla-tion to ASCII format

    OBA FeaturesIntroduction 1-5

    Automatic lter scanning

    Live, current, and overall spectra graphs

    Interval history of spectra

    Filter sets:- 31.5Hz to 8KHz, octave and lters (814 OPT-30)- 31.5Hz to 16KHz octave and lters and 25Hz to 20KHz .one-third octave lters (814 OPT-31)

    Simple SLM Features

    Quick on-screen setting adjustment

    Back-erase (up to 50 seconds)

    Snapshot memory (Snapshots of data stored tomemory)

    Logging SLM Features

    Overall SLM

    Current SLM, resetable for making spot checks dur-ing measurements

    Functions measured: SPL, Lmax, Lmin, Lpeak I,Lpeak II, TWA, SEL, elapsed time, start time, endtime, six Ln values (0.01 to 99.9%), time stamps forsingle events (Lmax, Lmin, etc.).

    Interval statistics history (includes 6 Ln values)

    Time history

    Ln statistic graph (1 to 99%)

    Printable distribution and cumulative histograms

    Overall & Current measurements

  • 1-6

    Contains two independent data buffers (primaryand secondary)

    Primary buffer contains data referred to as theoverall measurements

    System System 814 User Manual 1/23/98

    Secondary buffer contains data referred to as thecurrent measurement

    814 Components

    Figure 1-1 System 814. The System 814 is a convenient hand-held sound level meter with a simple user interface.

    The standard System 814 shown in Figure 1-1 includesthe following:

    1/2 diameter condenser microphone

    Backlit graphic 64 x 128 pixel LCD display

    Condenser

    LCD Display

    Keypad

    Connectors

    Microphone

    38 cm(15)

    9 cm(3.5)

    Preamplier

  • 1/23/98

    14-key soft rubber backlit keypad

    AC output gain control, AC/DC output, control,serial, and external power connectors (shown in g-ure Figure 1-2)

    Control Con

    AC/DC Out

    AC Output G

    Serial Interfa

    External DC

    Control Con

    AC/DC Out

    AC Output G

    Serial Interfa

    External DC Introduction 1-7

    True hand held instrument with sure grip pads

    Sealed to prevent electrical shorts due to weather

    Figure 1-2 System 814 Connectors. The System 814 has a series of connectors located at the bottom of the device consisting of an AC and DC output connection, AC output gain adjustment, control connector, serial interface connector, and external DC power connector.

    nector

    put Connector

    ain Adjustment (-6 to +20dB)

    ce Connector

    Power Connector

    nector

    put Connector

    ain Adjustment (-6 to +20dB)

    ce Connector

    Power Connector

  • 1-8

    The following is a layout of the control connector,serial connector and the AC/DC output connector:System 814 User Manual 1/23/98

    Figure 1-3 Control Connector: The control connector is a 9 pin mini DIN connector.

    1 - Ground, Control2 - Logic output (0 to +5 volts, active high)3 - Logic input (0 to +5 volts, active high)4 - Wind speed input (.05 to 10 volts AC peak to peak)5 - Wind direction A:D input (0 to +5 volts DC)6 - Wind direction power (+5 volts DC through 250ohms)7 - Calibrator control output (0 or +5 volts DC)8 - Heater control output (open collector, +50 volts DCmax, 0 556- .3 DC min 100mA)9 - External power Input/Output (+8 to +15 volts DC)

    The serial connector is used for computer, printer andmodem communications:

    Figure 1-4 Serial Connector: The serial connector is an 8 pin mini DIN connector (AppleTalk TM compatible pinout).

    1 - Flow control output (RS-232C levels)2 - Flow control input (RS-232C levels)3 - Transmit data negative output (RS-232C levels)

    1 2

    3 4 5 67 8 9

    1 23 4 56 7 8

  • 1/23/98

    4 - Ground 5 - Receive data negative input (RS-422)6 - Transmit data positive output (RS-422)7 - Control input (RS-232C levels)8 - Receive data positive input (RS-422)

    System Introduction 1-9

    The AC/DC output connector is used to output thesignal from the System 814 microphone to externaldevices such as DAT recorders, other sound levelmeters, or other sound/vibration equipment.

    Figure 1-5 AC/DC output connector

    Diagram

    Figure 1-6, which follows, illustrates the acoustic-to-digital signal path in the System 814. As you can see,incoming sound is rst converted to an electrical signalby the microphone. This electrical signal is ltered,detected (true RMS detector) and in turn sampled byan analog-to-digital converter (ADC). The processorthen calculates all of the desired data based on thesampled data (sample rate of 32 Hz).

    DC Output

    AC Output

    Ground (-)

    (+)

  • 1-10

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    L04

    2System 814 User Manual 1/23/98

    Figure 1-6 System Diagram.

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  • 1/23/98

    Overall and Current Measurements

    The System 814 contains two independent data buffersthat can separately accumulate data. In essence, the

    Getting

    UnpackiIntroduction 1-11

    instrument becomes two sound level meters in one.The data in the primary buffer is referred to as theoverall measurement, while data in the secondarybuffer is referred to as the current measurement.

    When a new measurement is initiated, the data in theoverall and current buffers will be identical untilthe current buffer is reset. Following the reset, thedata in the current buffer represents a new measure-ment originating at that instant while the overallbuffer continues with the original measurement.

    Started

    This section outlines the steps to follow when you rstreceive and unpack the System 814. The following top-ics are covered:

    Unpacking and Inspection

    Accessories and Optional Equipment

    Connecting Internal or External Power

    Quick Start

    Environmental Considerations

    You will then be ready to use the System 814 for actualmeasurements.

    ng and Inspection

    Your System 814 has been shipped in protective pack-aging. Please verify the package contents with the fol-lowing list (Accessories and Optional Equipment) andretain the shipping containers for safe shipment at a

  • 1-12

    future date. Report any damage or shortage immedi-ately to LarsonDavis, Inc. at (801) 375-0177.

    If you have not already done so, please record yourinstruments serial number (located on the label on the

    Accesso

    Wind noisesurements.on the mnoise and pdust and buSystem 814 User Manual 1/23/98

    back of the System 814), the microphone model andserial number (located on the inside ring of the micro-phone, and on the side of the pre-amplier), and thepurchase date at the beginning of this manual (see thecopyright page). You may be asked to give this infor-mation in any future communications you may havewith LarsonDavis, Inc.

    ries and Optional Equipment

    The System 814 is delivered with the following stan-dard accessories:

    System 814 instrument

    Model PRM904 microphone preamplier

    Air condenser microphone

    Alkaline batteries, 3 x AA 1.5 volt

    can adversely affect mea- Using the windscreenicrophone reduces windrotects the element frommps.

    3 diameter windscreen (LD # WS001)

    User manual (LD #I814.01)

    Serial cable to computer (LD # CBL006)

    Serial cable to printer (LD # CBL002)

    AC/DC out cable 1/8 miniphone to dual BNC (LD #CBL042)

    AC power adapter (US only) 115 volts AC to 9 voltsDC (LD # PSA017)

    Hard case 15x19x7 (LD #CCS001)

    814 utility software (WindowsTM)

    The following optional equipment is also available:

  • 1/23/98

    CAL200 Sound Level Calibrator (IEC 942-1988Class 1L)

    CAL250 Sound Level Calibrator (IEC 942-1988Class 1L)

    ConnecIntroduction 1-13

    Outdoor preamplier (LD # PRM2101)

    20 foot microphone extension cable (LD # EXL020)

    Direct BNC microphone input adapter (LD#ADP005)

    ting Internal or External Power

    To insert the three AA batteries in the System 814,unscrew the battery cover at the back of the System 814by hand or using a at blade screwdriver. Insert thebatteries so that the markings in the battery compart-ment match those found on the batteries. For greatestbattery life use alkaline AA batteries. (Refer to the vkey description in Chapter 2 and Appendix C of thismanual for additional battery information.)

    WARNING! Inserting the batteries incorrectly can cause damage to the unit!

    Figure 1-7 Internal Battery Source.

  • 1-14

    If the System 814 is not being usedfor long periods of time (3 months ormore), it is recommended that thebatteries be removed to avoid damageto the instrument.

    Alternatively, you may use an external power sourcevia the external power connector using the providedpower adapter. The System 814 accepts 8V to 15V DCand is internally fused at 0.5 A.

    Quick S

    This screenuser infordened as tings. Thisserial numbthe rmwaSystem 81instrument

    This screenpower souexternal poSystem 814 User Manual 1/23/98

    tart

    This section will help you turn on the System 814 (Step1), check the battery level (Step 2), calibrate the instru-ment (Steps 3-5), activate a specic instrument deni-tion ID (Steps 6-7), take a sample reading (Step 8), andnally turn off the instrument.

    displays three lines ofmation which may bename and address set-

    display also shows theer of the instrument and

    re version and date. The4 then loads the last denition (ID) selected.

    Step 1 Turn on the System 814. To do this, press the v key (located on the left portion of the key pad). By pressing this key, the LarsonDavis logo appears while a number of tests are per-formed. The following screen then appears:

    shows you the currentrce, battery level, andwer voltage.

    Step 2 Check the battery level. After the System 814 is turned on, you can check the battery level. To do this, press the v key again. The fol-lowing screen appears:

  • 1/23/98

    Step 3 Calibrate the instrument. To do this, press the TTOOLS key. The following menu appears:

    Press the rbration sett

    If you selerange as wthere will while the inHigh rangeIntroduction 1-15

    key to edit the Cali-ings.

    Step 4 Using the d key, highlight the Calibration menu item, then press the r key. The fol-lowing screen appears:

    ct to calibrate the highell as the Normal range,be a forty second delaystrument stabilizes at the setting.

    Step 5 Using the d key again, highlight the Change menu item. Press the c key to accept the Calibration settings. Activate the calibrator (optional equipment) and follow the on-screen instructions.

    Step 6 Activate an instrument ID. To do this, press the SSETUP key and the following Setup menu screen appears:

  • 1-16

    You may be prompted at this time tosave the last ID used or data.

    If this is your rst time using theSystem 814 and you have not set upany IDs, orings, selectlast ID or t

    The Simplnow ready

    Step 7 Using the u or d keys, highlight the SIMPLE ID (SSM). Then, press the c key to select it. The following screen appears:

    The instrusymbol (when the ining measur

    The instrusymbol (when the innot taking m

    EnvironmSystem 814 User Manual 1/23/98

    have not taken any read- no if prompted to saveo save data.

    e Sound Level Meter isto use.

    ment shows a runningupper right hand corner)strument is actively tak-

    ements.

    Step 8 Take a sample reading. To take a sample read-ing press the s RUN/STOP key to start tak-ing measurements. A screen similar to the following appears:

    Let the instrument continue to take measure-ments for about three minutes.

    ment shows a black boxupper right had corner)strument is stopped andeasurements.

    Step 9 Press the s RUN/STOP key again to stop the instrument.

    Step 10 Turn off the instrument. To do this, press and hold the v key until you are prompted to release it. The instrument then turns off.

    ental Considerations

    The System 814 sound level meter can be used andstored in a wide range of temperatures, which are freeof moisture and condensing humidity conditions.However, common-sense precautions should be taken.For example, allow the System 814 ample time toadjust to abrupt temperature changes. Condensationmay form inside a cold instrument if it is brought into

  • 1/23/98

    a warm room or vehicle and may persist long after theoutside case has adjusted to the ambient temperature.

    Temperatures inside closed vehicles can also reachexcessive levels. Therefore, do not leave the instrument inIntroduction 1-17

    direct sunlight in a vehicle. A simple safeguard is to keepthe instrument inside its sealed foam insulated casewith desiccant silica gel, available at photographicequipment stores.

  • 1-18 System 814 User Manual 1/23/98

  • 2/27/98

    C H A P T E R

    2 ReferenceReference 2-1

    This chapter contains information on the functionswhich are accessed through the System 814 keypad(see Figure 2-1 below):

    Figure 2-1 System 814 Keypad.

    The 14 keys on the System 814 keypad are organizedinto these four sections: Power, Measurement, Naviga-tion, and Control. These keys are covered in the fol-lowing order in this chapter:

  • 2-2

    Power Key

    vPOWER

    Turns on / off the System 814.System 814 User Manual 2/27/98

    Measurement Keys

    Navigation Keys

    Control Keys

    sRUN/STOP

    Begins and ends measurements.

    pPAUSE

    Pauses readings.

    RRESET

    Resets data. (Current, Overall, Options, etc.)

    ....ulr....d

    ARROW

    Used to move through System 814 menus and change settings.

    cSELECT

    Selects highlighted menu items (like a button on a mouse), concludes data entry (like the Enter key on a PC key-board) and activates context specic menus (called Check menus).

    VVIEW

    Changes views in sSLM, OBA, or SLM modes. Selects data to view.

    DDATA

    Displays the Data Files menu.

  • 2/27/98

    v Pow

    SSETUP

    Displays the Setup menu. Allows you to view and change system modes and congurations within a chosen mode.Reference 2-3

    The functions and displays associated with the abovekeys are next described. In addition, relevant referencematerial is included for parameters and options whichmay be available for keys on the System 814 keypad.

    NOTE: The reference information in this chapter is organizedaccording to functions, rather than by tasks (which can use severalfunctions). We therefore invite you to also read the tasks which areoutlined in Chapters 3-5 of this manual.

    er Key

    The purpose of the POWER key v on the System 814is to turn the power on or off, exit and close menus,and display the remaining battery life. Once the Sys-tem 814 is turned on, pressing the v key again willactivate a PWR display which allows you to changescreen contrast, turn the backlight on or off, and adjustpower options. To turn the instrument off, press andhold down the v key until prompted to Pleaserelease key. Release the v key and the instrumentturns off.

    This section discusses the following:

    Power-up the Instrument / Viewing PWR Display

    Power Settings

    TTOOLS

    Displays the Tools menu. Allows you to change Calibration, Clock/Timer, Memory, Lock, Power Monitor, and Communication settings.

    PPRINT

    Displays the Print menu. Allows you to change print settings, and to print data reports and Snapshots.

  • 2-4

    Extra Notes on Power Conservation

    Power-up the Instrument / Viewing PWR DisplaySystem 814 User Manual 2/27/98

    To turn on the power:

    Step 1 Press the v key.

    Step 2 Allow the instrument to stabilize (warm up) as indicated by the hourglass symbol in the screens upper right hand corner.

    Step 3 After the instrument has nished stabilizing (as indicated by the black box symbol in the screens upper right hand corner), the System 814 is ready for operation.

    After the System 814 is turned on, you can view thebattery life and display settings through the PWR dis-play. To do this:

    Step 4 Press the v key so the following PWR dis-play appears:

    a. Pressing the v key again will return you to the previ-ous display.

    b. From this display, you can adjust the contrast and turn the backlight on or off. Pressing the u or d key adjusts the contrast. Pressing the r key turns the backlight on or off.

    This simple display indicates that the System 814 is not plugged into an external source which is 0.0 volts; the battery is 66% full; the backlight is off; and contrast is at 60%.

  • 2/27/98

    Step 5 From the PWR display, you can adjust the Power setting. To do this, press the c key. The following Check menu appears:Reference 2-5

    a. Check menus allow you easy access to system or instru-ment settings.

    b. Using the uord arrow keys, select the desired menu item then press the r key to make changes to the setting.

    This menu allows you to adjust the contrast (or view-ing angle), turn the backlight on or off, and adjust set-tings that control the power-conservation features.These power-conservation features allow you to set theinstrument to do the following:

    Turn the backlight off after a set amount of time

    Automatically go into a standby mode after a setamount of time

    Automatically shut off the instrument after a setamount of time

    Conserve internal battery for memory retention

    If no keyboard activity is detected for the period oftime set by the Backlight Time setting, the instrumentwill turn off the backlight. This conserves battery lifesince the backlight is a major consumer of batterypower. If Backlight Time is set to zero (0), then the timeris disabled and the backlight will stay on until turnedoff manually. If the battery capacity is less than 30%,the backlight will automatically shut off in 3 seconds.

  • 2-6

    Power Settings

    Use the u and d keys tomove from one setting to the next.Then use thselected seused to retu

    The Power menu provides the following seven options:

    Menu Ite

    Power O

    Auto Of

    Standby

    BacklighSystem 814 User Manual 2/27/98

    e r key to change thetting. The l key isrn to previous menus.

    ms Available Settings Options Description

    ff Mode Blank LCDAuto OffManual Off

    Blank LCD - The instrument LCD dis-play will turn off as well as the serialcommunication port after the key-board and serial port have been inac-tive for the period of time set by theStandby Time option.

    Auto Off - If the instrument is stoppedwith no reports printing, and theinstrument remains inactive for theperiod of time set by the Auto-Off Timesetting (i.e with no serial interfacecommands or key presses), the instru-ment will turn off.

    Manual Off - No automatic power reduc-tion features are enabled.

    f Time 0 - 99 minutes Time (in minutes) when Auto Off power save is activated. When acti-vated, the System 814 powers down.

    Time 0 - 99 minutes Time (in minutes) when Standby Time power save is activated. When activated, the System 814 screen blanks and the serial port turns off. If any key is pressed or if incoming serial activity is detected, the instrument will exit Standby Time and become active again.

    t Time 0 - 99 seconds Time (in seconds) when the backlight is turned off. The backlight is reacti-vated when any key is pressed.

  • 2/27/98

    Extra No

    Backlight On/Off Turns backlight on/off.

    LCD Contrast 0 - 99% Adjusts the viewing angle of the LCD display. This is done by pressing either the up or down arrow key. The u

    ExternalReference 2-7

    tes on Power Conservation

    If you are using an external power supply, rather thana battery, the v key will display the constant voltagecoming from the power supply. The System 814 canoperate for approximately 40 four hours when it isrunning from new alkaline batteries. The instrumentcan be set to conserve the internal batteries for mem-ory retention only if it is to be powered by an externalpower source by setting Ext Power to [Battery]. If theexternal supply ever drops below the voltage set bythe Cut Off Volts setting, or reverts to internal battery,the unit stops and turns off. This cut-off voltage is usu-

    key increases the contrast percentage, darkens the display and makes it visi-ble from a higher angle (when viewing from the bottom of the instrument). The d key decreases the contrast percentage, lightens the display and makes it more visible from a lower angle.

    Power AC PwrBattery

    Allows the user to select the source of power consumption, either AC or bat-tery.

    AC Pwr - Indicates that the externalpower source is not a battery. In thismode, if the external voltage is lessthan the internal battery voltage, thenthe internal batteries will supplypower for the instrument.

    Battery - Indicates that the externalpower source is a battery (whichshould not be allowed to deep-dis-charge).

  • 2-8

    ally set to 10.8V which is the lowest voltage recom-mended for 12V sealed lead-acid batteries.Discharging batteries deeply will greatly shorten theirservice life.

    s Run

    R ResSystem 814 User Manual 2/27/98

    /Stop Key

    Use the s RUN/STOP key to toggle the data takingmode of the instrument from stop to run or from run tostop. The mode of the instrument is indicated on thedisplay in the upper right hand corner by a runningsymbol if the instrument is running, or a black boxsymbol if the instrument is stopped.

    Repeatedly pressing the s RUN/STOP key afterbeginning a measurement will stop, then restart themeasurement without resetting the data buffer. As aresult, the time will continue to increase for both thecurrent and overall measurements and the respectiveintegrated levels (time weighted averages) will repre-sent data measured since the last reset.

    NOTE: The System 814 contains two independent data buffersthat can separately accumulate data. In essence, the instrumentbecomes two sound level meters in one. The data in the primarybuffer is referred to as the overall measurement, while data in thesecondary buffer is referred to as the current measurement.

    et Key

    Use the R RESET key to clear out the data of the cur-rent measurement.

    Pressing the s RUN/STOP key after beginning ameasurement will stop the measurement, then restartit without resetting the data buffer. If you are using thesimple sound level meter (SLM) instrument and wishto reset the data, simply press the R RESET key. Thiswill reset the data including the accumulated measure-ment values such as Leq.

  • 2/27/98

    NOTE: The System 814 contains two independent data buffersthat can separately accumulate data. In essence, the instrumentbecomes two sound level meters in one. The data in the primarybuffer is referred to as the overall measurement, while data in thesecondary buffer is referred to as the current measurement.

    p PauReference 2-9

    For the other instrument types, the System 814 givesadditional exibility when resetting the data. If youpress the R RESET key while the instrument is run-ning, the instrument will reset its data buffer for thecurrent measurement (i.e. the secondary SLM) and setthe elapsed time for the current measurement to zerowithout affecting the data in the overall buffer.

    On the other hand, if you press the R RESET keywhile the instrument is stopped, a menu will appearthat will give you the choice of resetting the currentdata, the overall data, or both current and overall datatogether with the appropriate elapsed time counters.

    When editing system or instrument settings containinga string of characters, the R RESET key can also beused to clear the characters from the current positionof the cursor to the end of the string.

    se Key

    Use the p PAUSE key to pause the measurement ofacoustic data. It is used to hold a displayed value orprevent some undesired sound from affecting the mea-surement. In the sSLM mode, you can use pause toextract the last measured data (up to 50 seconds) bymoving the cursor back in time on the graph, toremove contaminated data. This can be accomplishedin the Pause, Back Erase screen. To activate this screen,press the p PAUSE key when the instrument is run-ning or actively taking measurements. The followingscreen appears:

  • 2-10

    Moving thback in tim

    lruSystem 814 User Manual 2/27/98

    e bar left is like movinge.

    Use the l and r arrow keys to move the verticalbar across the graph. As the vertical bar moves, theSPL value from the time history display is shown digi-tally on the left of the screen. Once it is at the desiredpoint, press the c key to continue.

    Like the stop command, a pause ignores incomingsignals; however, unlike the stop command, when apause changes to the run command, the instru-ment does not begin a new record.

    Pressing the p PAUSE key when a instrument isstopped brings up a Preview display (shown below),which allows the user to view the SPL and instanta-neous peak levels without affecting measured data.Pressing the p PAUSE key again will exit this screen(or simply press the s RUN/STOP key to exit thisscreen and start taking measurements again).

    d Arrow Keys

    Use the u and d (Up and Down) arrow keys tomove from one item to another in a menu, or from onerecord to another when displaying history data. Hold-ing the key for a period of time will repeat the actua-tion of the key; the longer it is held the faster it repeats.

  • 2/27/98

    These keys are also used to modify settings. Use theu key to step to the next higher number or charac-ter value, and use the d key to step to the nextlower number or character value.

    c Che

    V ViewReference 2-11

    Use the l and r (Left and Right) arrow keys tomove between data displays, to move between charac-ters of a setting being modified, and to move throughmenus. Use the r arrow key to move from the cur-rent menu into a sub-menu or to modify a setting. Usethe l arrow key to move out of a setting, to movefrom a sub-menu back to its parent menu, or to moveback to a previous menu or display. Holding the keyfor a period of time will repeat the actuation of the key;the longer it is held the faster it repeats.

    ck Key

    Use the c key to choose an item from a menu or toconfirm the entry of a setting. Pressing c in some dis-plays will bring up a menu that will allow you to makechanges to settings appropriate to that display.

    Key

    Use the VIEW key V to select the particular data dis-play you wish to view. When you press the V VIEWkey, a menu containing the available data displays willappear. The following example is a View menu for theOBA (Octave Band Analyzer) instrument:

  • 2-12

    Use the u or d keys and c key to select the dis-play desired. While viewing data, often more than onedisplay screen is available. You can use the l andr arrow keys to move from one screen to another.

    D Data

    If the instryou try to sbe promptement beforeSystem 814 User Manual 2/27/98

    Key

    Use the D DATA key to control the storing andrecalling of measurements from memory. Each mea-surement may contain cumulative data, time history,interval history, and histogram tables that can bestored and segregated in memory from other measure-ments with their data and histories. A list of all storeddata is shown and individually recalled by selecting itusing the arrow keys and check key.

    To access the Data Files menu press the D DATA key.A screen similar to the following appears:

    From this menu you can store data, view stored data(or Snapshots if you are using the simple sound levelmeter) or recall data.

    ument is running whentore a Data File, you willd to stop the measure- storing the le.

    To store measurement information into a Data File,highlight Store Data (Store SnapShot is also available ifusing the simple sound level meter) using the u ord keys. Press the c key to select. The instrumentwill beep twice to signify that the measurement hasbeen stored.

  • 2/27/98

    To move from one record to another,use the uor dkeys.

    To exit the Data Records view, usethe VIEW key V.

    Pressing thbrings up arecall data, of all recordor purge all

    To view a Data File, use the u or d keys to selectthe desired data le. Each data le is marked with anumber (e.g.: Recall: 01) and the instrument used (e.g.:SIMPLE SSM). An entry with a * next to it indicatesthat the data le is still in memory or that the data le

    When recaltem 814 wment that t(i.e. OBA tcurrently ment and le).

    S Setu

    To the left oing inform> symbolcurrently acurrently inThe lockedthe ID is lID from beiThe p symis permanenThe * symhas changesaved.Reference 2-13

    e c key from this menu menu that allows you tojump to beginning or ends, nd a specic data le, data les.

    is currently recalled. Use the r key to view a sum-mary of the data le. The following screen appears:

    The Data Records screen shows the currently selectedrecord number (1/12), start / stop dates and times, andthe total bytes used by the record.

    ling a data le, the Sys-ill switch to the instru-he data le was stored aso sSLM, if the user wasusing the OBA instru-recalled an sSLM data

    Using the c key after highlighting a data le from theData Files menu, allows you to recall previously storedmeasurements. The menu will then close, and the pre-viously active data display will be shown.

    p Key

    f each ID is a symbol giv-ation about that ID: The indicates that the ID isctive or that the ID is memory.

    symbol indicates thatocked which protects theng easily deleted. bol indicates that the IDt and pre-dened.bol indicates that the IDd and is not yet been

    Use the S SETUP key to access the Setup menu whereyou can select, create, and manipulate groups ofinstrument settings known as instrument denitions(ID). The Setup menu presents a list of pre-dened IDs(marked with a p) and user-dened IDs that areavailable for use. To access the Setup menu, press theS key. The following screen appears:

  • 2-14

    If data fromsaved, you at this timthat was acments or chSystem 814 User Manual 2/27/98

    An ID defines the data that is to be measured for a par-ticular project or type of application. The definedproject IDs are listed in the Setup menu. Using thismenu you can create, edit, copy, and delete theseproject settings. You can also define a project ID on acomputer and then install it into the instrument whereit may be selected for use. For example, one projectmay be the simple SLM (sSLM) where no data log-ging is performed and the weighting and detector con-trols are available in the data display (rather than in amenu). Another example may be an hourly statisticalmeasurement set to run for 8 hours.

    a previous ID was notwill be prompted to do soe. This can include datacumulated from measure-anges in ID settings.

    To select an instrument denition (ID), use the u ord keys to highlight the desired ID. Press the c keyto select and activate the instrument denition. TheSetup menu then closes and the main display reap-pears.

    Use the Setup Tools menu to create new IDs. To do this,press the T TOOLS key from the Setup menu. Thefollowing screen appears:

    The Setup Tools menu allows you to create and/ormodify instrument denition (ID) settings. The SetupTools menu provides the following three options,

  • 2/27/98

    which are later described in greater detail:

    Save ID

    Title

    ID Name

    Write Pr

    Menu Items DescriptionReference 2-15

    The Save ID menu item creates a new ID. Use the uor d keys to highlight Save ID, then press c.You will then be prompted to enter a name for the ID.The ID name eld is capable of holding up to 8 charac-ters. Any spaces will be replaced with a _ character.

    The Title menu item allows you to attach a descriptionto your ID. This description can be used on printedreports and other items. The Title eld is capable ofholding up to 30 characters.

    The ID Name menu item allows you to give an ID aunique name that represents the ID in the Setup menu.The ID name eld is capable of holding up to 8 charac-ters.

    otect, Delete, Write Enable IDs

    After an ID has been created, it can be protected (orlocked), or deleted if necessary. To do this, use the uor d keys from the Setup menu to highlight thedesired ID. Then press the T TOOLS key, and the fol-lowing screen appears:

    Save ID Saves/Creates a ID

    Title Description of ID

    ID Name Name of ID

  • 2-16

    Permanent IDs (marked with a pSetup menu) cannot be write pro-tected, modied, or deleted.

    To write protect (or lock) an ID, use the u ordkeys to highlight Write Protect, and then pressthe c key. A locked symbol appears next to the IDin the Setup menu symbolizing that this ID is WriteProtected. Once the ID is write protected, it cannot be

    Permanentsymbol on protected IDsymbol onbe deleted.

    TToolsSystem 814 User Manual 2/27/98

    changed or deleted until it is Write Enabled.

    IDs (marked with a pthe Setup menu) or write

    s (marked with a locked the Setup menu) cannot

    To delete an ID that has not been write protected, usethe u or d keys to highlight Delete ID, thenpress the c key. The ID is removed from memoryand the ID name is removed from the Setup menu.

    To write enable (or unlock) an ID, use the u or dkeys from the Setup menu to highlight the desiredwrite protected ID (marked with a locked symbol ).Press the T TOOLS key. Press the c key on thehighlighted Write Enable menu option. The lockedsymbol disappears next to the ID shown in the Setupmenu, symbolizing that this ID is write enabled.

    Key

    Use the T TOOLS key to access controls and opera-tions such as calibration, battery usage, memory usage,setting date and time, timer, or computer port settings.In certain situations you also use the T TOOLS keyto delete, write enable, or write protect instrument def-initions (ID) from the Setup menu (as previouslydescribed).

    Press the T TOOLS key to access the Tools menu.Pressing the r key on a menu item from the Toolsmenu allows you to modify settings. Pressing the ckey on a menu item from the Tools menu allows you toview current settings and other displays.

  • 2/27/98

    The Tools menu provides the following seven options,which are afterwards described in greater detail:

    Menu Items Available Settings Options Setting Screens

    About

    Calibrati

    Clock/T

    Memory

    Lock

    Power MReference 2-17

    (rkey from Tools menu) ( c key from Tools menu)

    NameNameNameTitle

    a - System date and numbersb - User informationc - Installed options

    on CheckChangeCal LevelCalibrator S/N

    Calibration - dates, times, and measurement when checked or changed

    imer Current TimeCurrent DateDay of WeekTimer ModeRun DateStop DateRun Time 1Stop Time 1Run Time 2Stop Time 2

    a - Current time, date, and time until next actionb - Timer mode status and set-tings

    Purge AllAllocated IDsCreate EEPROM Backup

    a - Memory status & current ......instrument memory infor-mationb - Overall memory status

    On/Off Lock status

    onitor Power Off ModeAuto-Off TimeStandby TimeBacklight TimeBacklightLCD ContrastExternal Power

    Battery - Power status and infor-mation

  • 2-18

    About

    Communication Baud RateSerial AddressFlow Control

    Communications - List of bytes sent and received, standby timer

    InstrumeInternal

    Internal System 814 User Manual 2/27/98

    To access the About displays, use the u or d keyto select About from the Tools menu, then press the ckey. The following screen appears:

    The About-a display shows the instruments modelnumber and serial number as well as the rmwarerevision number and date.

    Pressing the rkey moves to the About-b screen. Thefollowing appears:

    The About-b display shows the instruments customname based on title elds used for System 814 reports.

    Instrument model number

    nt serial numberrmware revision number and

    SLM rmware revision number and

    Company name and address(Customized by user)

  • 2/27/98

    The elds are generally set to the owners name andaddress. The name eld is used on summary datareports.

    Pressing the rkey again moves to the About-c

    Settings cpressing thscreens (pre

    Calibrat

    Environme

    Total instru

    Filter optio

    Double boxinstalledReference 2-19

    screen. The following appears:

    The About-c display shows the instruments total mem-ory as well as the availability of the optional ltermodule and environmental noise analyzer rmware.

    To access the About settings, use the u or d keyto select About from the Tools menu, then press ther key. The About setting offers three Name fieldsand one Title eld for use on System 814 reports.

    an also be accessed bye c key from the settingviously described).

    Name, Name, Name - There are three name lines avail-able for user specic data. Each Name eld provides 30alpha/numeric characters, and is used to describe theinstrument or the organization to whom it belongs.

    Title - Like the Name eld, the Title eld is capable ofholding 30 alpha/numeric characters. It shows you thetitle of the ID (Instrument Denition) you have cre-ated, and is used to describe the measurement.

    ion

    To access the Calibration display, use the u or dkey to select Calibration from the Tools menu, then pressthe c key. The following appears:

    ntal rmware availability (Not avail-

    ment memory (in bytes)

    n availability (1/1 Octave Filter

    es indicate that no optional ram is

  • 2-20

    Settings cpressing thscreens (pre

    Date and tOffset curr

    Date and time of the last calibration

    The level detected during the last checkSystem 814 User Manual 2/27/98

    The Calibration display shows the date and time of thelast calibration change and the offset being used to cal-ibrate the levels. It also shows the date and time of thelast calibration check and the level detected duringthat check.

    To access the Calibration settings, use the u or dkey to select Calibration from the Tools menu, then pressthe r key. The Calibration has these four followingsettings:

    an also be accessed bye c key from the settingviously described).

    Check - Activates the calibration check (level verica-tion) process.

    Change - Activates the calibration change (adjust) pro-cess.

    Cal Level - Enables the user to enter the level gener-ated by the calibrator.

    Calibrator S/N - Enables the user to record the serialnumber of the calibrator (for reference).

    ime of the last calibration changeently in use to calibrate the levels

  • 2/27/98

    Clock/Timer

    To access the Clock/Timer display, use the u or dkey to select Clock/Timer from the Tools menu, then

    Settings cpressing thscreens (pre

    Current ti

    Current d

    The time

    The curreThe run aThe rst r

    The time Reference 2-21

    press the c key. The following appears:

    The rst Time-a or clock display shows the currenttime, day of the week, date, and the time of the next

    timer function.

    Pressing the r key againmoves to the Time-b screen.

    The following appears:

    The Time-b or timer display shows the current timerprogramming including the mode and all run and stoptimes and dates.

    an also be accessed bye c key from the settingviously described).

    To access the Clock / Timer settings, use the u ord key to select Clock / Timer from the Tools menu,then press the r key.

    me

    ay of the week and date

    of the next timer function

    ntly-selected timer modend stop datesun and stop times

    of the next timer function

  • 2-22

    The Clock / Timer menu allows you to set the instru-ment's clock/calendar and timer. The rst three menuitems allow you to set the current time, date, and dayrespectively, while the remaining items (Run/StopDate, Run/Stop Time 1, Run/Stop Time 2) allow youSystem 814 User Manual 2/27/98

    to control the timer function.

    Current Time / Date - To set the current time and/ordate, highlight the desired item (i.e. Time or Date) andthen press the r key. Modify the setting using thel or r key to select the digit desired to modify,then use the u or d key to modify.

    Day Of Week - Allows you to change the current dayof the week. Use the u or d key to highlight thedesired day, then press the c key to select.

    Timer Mode - The System 814 has four timer modesselected by the Timer Mode setting:

    Off - The timer is disabled.

    1/Day - The timer will automatically turn the instru-ment on and initiate one run/stop cycle per day.

    2/Day - The timer will automatically turn the instru-ment on and initiate two run/stop cycles per day.

    Block - The timer will automatically turn the instru-ment on and initiate a single measurement begin-ning at a certain time on one day and ending at acertain time on the same or another day.

    The three enabled modes (i.e. 1/Day, 2/Day, andBlock) use the dates set by the Run Date and Stop Datemenu items to determine the range of valid days onwhich to make measurements.

    Run Date - The run date is used to enable the timermode when set to 1/Day, 2/Day, or Block.

    Stop Date - The run date is used to disable the timermode when set to 1/Day, 2/Day, or Block.

  • 2/27/98

    Run Time 1 / Stop Time 1 - If you have selected theblock mode, the timer will automatically turn theinstrument on. This setting allows the user to specifythe beginning and ending times of a measurement.

    Memory

    Available

    Available memory)

    Number oa given IDReference 2-23

    Run Time 2 / Stop Time 2 - Used to specify a secondmeasurement beginning and ending times in the 2/day timer mode.

    To access the Memory display, use the u or d keyto select Memory from the Tools menu, then press thec key. The following appears:

    The Memory-a display shows the amount of memoryavailable for storing data. This information is givenboth in bytes and as a percentage of the total memorythat can be used for storing data. (This total memorydoes not include the memory allocated for setup regis-ters.)

    In addition, the Memory-a display shows the number ofpreviously-stored history records (of various types) forthe given ID.

    Pressing the r key again moves to the Memory-bscreen. The following appears:

    memory (in bytes)

    memory (as a percentage of total data

    f various types of history records for (sSLM in this example)

  • 2-24

    The defaultallocated se5120 bytesmum valuecated setup814 has vthat are stoory. These cannot be cnot reduce ory availabprimarily adened IDs

    Settings cpressing thscreens (pre

    Available memory (in bytes)

    Available memory (as a percentage of total data memory)

    Number ostoring ins

    Total memregister m

    Total data les in mem-System 814 User Manual 2/27/98

    value of this setting is 10tup registers (which uses of memory). The maxi- of this setting is 50 allo- registers. The System

    e pre-dened ID registersred in permanent mem-pre-dened ID registershanged or deleted and dothe amount of data mem-le. They are to be useds templates for new, user-.

    The top portion of the Memory-b display shows thesame available memory information as in the Mem-ory-a display. In addition, the Memory-b display showsthe number of data les in memory; number of setupregisters allocated; and the total amount of memory,including that which has been allocated for setup reg-isters.

    an also be accessed bye c key from the settingviously described).

    To access the Memory settings use the u or d keyto select Memory from the Tools menu, then press ther key.

    Purge All Data Files - Pressing the ror c keywhen the Purge All Data Files menu item is highlighted,allows you to purge all data les in memory.

    Allocated IDs - Determines the number of setup regis-ters that are allocated in memory for storing IDs. Inessence, this setting determines how much memory isallocated for storing instrument denitions. Settingthis to a higher value allows more IDs to be created,but reduces the amount of memory available for datastorage by 512 bytes per allocated ID.

    Create EEPROM Backup - Creates a permanent recordof the most recently used OBA, simple SLM, and log-ging SLM IDs so that they may be recreated in theevent of a memory loss.

    f setup registers allocated for trument denitions (IDs)

    ory, including both data and setup emory

  • 2/27/98

    Lock

    The Lock function is used to limit unauthorized con-trol of the instrument. The Lock menu provides access

    Settings cpressing thscreens (pre

    Power MReference 2-25

    to the password setting and to the settings which lockvarious operations.

    To access the Lock display, use the uor d key toselect Lock from the Tools menu, then press the c key.The following appears:

    The Lock display shows the lock status and restrictions.If the instrument is currently locked, the displayprompts you for the unlock password.

    an also be accessed bye c key from the settingviously described).

    To change one of these Lock settings, highlight thedesired item and then press the r key.

    onitor

    This menu allows you to adjust the auto-power on oroff, adjust the contrast (or viewing angle), turn thebacklight on or off, and adjust settings that control thepower-conservation features. Refer to the v key (ear-lier in this chapter) for a full description of the PowerMonitor menu and displays.

  • 2-26

    Communication

    To access the Communication display, use the u ord key to select Communication from the Tools menu,

    Default is s2 digits of tbe set withi

    Shows theremainingpowers do

    Shows the(none in t

    Shows the(none in thSystem 814 User Manual 2/27/98

    then press the c key. The following appears:

    The Communication display shows the status of theserial port (i.e. how many minutes until the standbymode is automatically enabled) and the last charactersreceived and transmitted.

    To access the Communication settings, use the u ord key to select Communication from the Tools menu,then press the r key.

    Baud Rate - Speed at which the System 814 communi-cates with controlling devices (computer, modem, etc.)through the serial port. The baud rate has a range from300 to 115000 baud.

    et to the value of the lasthe serial number and cann the range of 1 to 100.

    Serial Address - Address of instrument. This setting isused to identify a particular instrument on a networkof instruments.

    Flow Control - Flow control of the serial connection.Flow control can be changed to None, Hardware, Xoff,or Both. Flow control prevents the loss of data wheneither the instrument or controllers input bufferbecomes full.

    minutes of inactivity before the serial interface wn

    last characters sent his example)

    last characters received is example)

    Indicates system ready to receive commands. Indicates controlling device (computer, modem, etc.) is ready to receive

    Indicates current address status.

  • 2/27/98

    P Print Key

    Use the P PRINT key to print graphical and tabulardata reports directly from the instrument to a printer.

    You can alcomputer athe computReference 2-27

    You can create high-resolution presentation-qualityreports when printing to a laser printer because of theinstruments PDL (page description language) capabil-ities. Draft-quality tabular data reports can also beprinted on virtually any printer.

    The Print menu provides the ability to output reportscontaining all the data gathered for the measurementto an attached printer. The main Print menu is acti-vated by pressing the P PRINT key and is commonto all instrument types (i.e. sSLM, OBA, and SLM).

    With an appropriate printer connection, you can printany of the four indicated reports by highlighting thecorresponding menu item and pressing the c key.Use any one of the rst three menu items to print thecorresponding standardized report. The three reportsare the same, regardless of the current instrument type.

    Use the fourth menu item, Tailored Report, to print thecustom reports that are dened as part of an instru-ment denition.

    so request reports from and then print them usinger's printer.

    Before you print a report, you can also select the PrintOption sub-menu which allows you to further custom-ize a report. In this sub-menu you can selecting thespecic elements to include in the report and also thevarious data ranges for histograms, time histories, etc.To access this sub-menu, highlight the Print Optionsitem then press the r key.

  • 2-28 System 814 User Manual 2/27/98

  • 1/23/98

    C H A P T E R

    3 OBA Octave Band AnalyzerOBA Octave Band Analyzer 3-1

    This chapter will help you better understand the Sys-tem 814s OBA (Octave Band Analyzer). Specically,this chapter covers the following topics:

    Setting up the OBA: overview of the possible set-tings and congurations of the System 814 in OBAmode.

    Understanding OBA Displays: overview of the dis-plays used in OBA mode and simple explanationsof how to read them.

    Using the OBA: simple applications that can beused with the System 814 in OBA mode.

  • 3-2

    Setting up the OBA

    There are four general steps for setting the System 814to OBA mode: 1) Go to the Setup menu. 2) Select the

    If the 814 there will OCTAVE Oto Step 4 beSystem 814 User Manual 1/23/98

    OCTAVE OBA. 3) Return to the Setup menu. 4)Thenenter the Settings menu.

    This procedure is discussed in more detail below:

    is already in OBA mode,be a > to the left ofBA. In which case, skip

    low.

    Step 1 Press the S SETUP key. A menu similar to the following appears:

    Step 2 Select OCTAVE OBA from the menu by press-ing the u or dkeys and then pressing the c key. The OBA screen which was last accessed appears. For example, this particular OBA screen may appear.

    If you have not already saved your data, you will be prompted to save it at this step.

    Step 3 The 814 is now set to the OBA mode.

  • 1/23/98

    In this example, the Title setting isselected and Octave Band Analyzeris the current title. To change thetitle, use the arrow keys described inthe Title section (discussed later).

    Step 4 To access the OBA Settings menu, press the S key. The Edit Settings: *OCTAVE OBA is highlighted as the Setup menu:

    Availabl

    Use the umove fromThen use thselected seused to retuOBA Octave Band Analyzer 3-3

    Step 5 Press the rkey and the Settings menu appears:

    e Settings

    and d keys to one setting to the next.e r key to change the

    tting. The l key isrn to previous menus.

    The 814 offers a number of OBA settings for control-ling, gathering, and logging spectral data. The follow-ing is a chart of these settings. Each setting is thendescribed later in greater detail.

    Menu Items Available Settings Options

    Title Title

    OBA ScanMode ManualAutoTimed

    OBA Prole NormalShortLongCustom

  • 3-4

    Title Set

    To change and lkter. Use thereplace thethe R keythe cursor t

    OBA Bandwidth 1/11/3

    Range NormalLowSystem 814 User Manual 1/23/98

    ting

    the Title, use the reys to select each charac- u and d keys to

    selected letter. Pressing clears all characters fromo the end of the eld.

    High

    Transducer CondnsrElctretDirect

    Intv Enable NoYes

    Intv Period (hh:mm:ss)

    Intv Time Sync(Time Sync)

    NoYes

    Intv Auto Stop(Auto Stop)

    NoYes

    AC Out Weight FlatWght

    Menu Items Available Settings Options

    Title Title

    OBA ScanMode ManualAutoTimed

    OBA Prole NormalShortLongCustom

  • 1/23/98

    OBA Sc

    You can chthe l an

    OBA Bandwidth 1/11/3

    Range NormalLowOBA Octave Band Analyzer 3-5

    Use the Title setting to create a title or header forprinted reports. This title/header will be placed at thetop of each OBA report you print.

    anMode Setting

    ange the lter by usingd r keys.

    Use the OBA ScanMode setting to set the method forscanning the octave or third octave lters. This settingprovides the following three options:

    Manual - By selecting Manual, you control the tim-ing and the order of the lters measured. The 814 doesnot automatically change lters as with the otheroptions; instead, the 814 measures using the lter thatyou have selected.

    Auto - By selecting Auto, the instrument measureseach lter for a selected time (see OBA prole on page3-6) to ensure an accurate rea