integrity test set pit100-mk2...chell instruments ltd folgate house folgate road north walsham...

Chell Instruments Ltd Folgate House Folgate Road North Walsham Norfolk NR28 0AJ ENGLAND Tel: 01692 500555 Fax: 01692 500088

Pressure Pipe Integrity Test Set

PIT100-MK2

OPERATING MANUAL

e-mail:- [email protected]

Visit the Chell website at: http://www.chell.co.uk

900240-1.1

Please read this manual carefully before using the instrument.

Use of this equipment in a manner not specified in this manual may impair the user’s protection.

Chell Document No. : 900240 Issue 1.1 ECO: --- Date: 3rd March 2021

Chell’s policy of continuously updating and improving products means that this manual may contain

minor differences in specification, components and circuit design from the actual instrument supplied.

INDEX

SECTION 1 - INSTRUMENT OVERVIEW ........................................................................................................................... 6

SECTION 2 - SPECIFICATION ........................................................................................................................................... 7 2.1 REQUIRED SERVICES: ............................................................................................................................................ 7 2.2 OPERATING CONDITIONS: ...................................................................................................................................... 7 2.3 MEASUREMENT AND OUTPUTS: .............................................................................................................................. 7 2.4 DIMENSIONS: ..................................................................................................................................................... 7

SECTION 3 - INSTALLATION AND INTERCONNECTIONS .................................................................................................. 8 3.1 LOCATION ......................................................................................................................................................... 8 3.2 CONNECTIONS .................................................................................................................................................... 8

3.2.1 Mains Connection ................................................................................................................................... 8 3.2.2 Pneumatic Supply .................................................................................................................................... 8 3.2.3 Ethernet Connection ................................................................................................................................ 8 3.2.4 Port A & Port B ........................................................................................................................................ 8

SECTION 4 - FRONT PANEL OPERATION ......................................................................................................................... 1 4.1 INTRODUCTION ................................................................................................................................................... 1 4.2 FLOW SET CONTROL (PORT A REFERENCE) ................................................................................................................ 1 4.3 MAIN SCREEN .................................................................................................................................................... 1 4.4 DEVICE SETUP MENU ........................................................................................................................................... 2 4.5 MAIN TEST SCREENS ............................................................................................................................................ 2

SECTION 5 - CONTINUITY TEST ...................................................................................................................................... 4 5.1 INTRODUCTION ................................................................................................................................................... 4 5.2 RUNNING A CONTINUITY TEST ................................................................................................................................ 4 5.3 CONFIGURING A CONTINUITY TEST .......................................................................................................................... 6

SECTION 6 - LEAK TEST .................................................................................................................................................. 7 6.1 INTRODUCTION ................................................................................................................................................... 7 6.2 LEAK RATE UNITS ................................................................................................................................................ 7 6.3 TEMPERATURE EFFECTS ........................................................................................................................................ 7 6.4 RUNNING A LEAK TEST.......................................................................................................................................... 8 6.5 CONFIGURING A LEAK TEST .................................................................................................................................... 9

SECTION 7 - FLOW TEST ............................................................................................................................................... 11 7.1 INTRODUCTION ................................................................................................................................................. 11 7.2 RUNNING A FLOW TEST ...................................................................................................................................... 11 7.3 CONFIGURING A FLOW TEST ................................................................................................................................ 13

SECTION 8 - PURGE...................................................................................................................................................... 14 8.1 INTRODUCTION ................................................................................................................................................. 14 8.2 RUNNING PURGE .............................................................................................................................................. 14 8.3 CONFIGURING PURGE......................................................................................................................................... 15

SECTION 9 - SETUP SCREENS ........................................................................................................................................ 16 9.1 COMMS SETUP ................................................................................................................................................. 16 9.2 SELF-TEST ....................................................................................................................................................... 16

9.2.1 Self-Test Parameters ............................................................................................................................. 17 9.3 FACTORY DEFAULTS CONFIRM SCREEN ................................................................................................................... 18 9.4 MENU LOCKOUT SCREEN .................................................................................................................................... 18

SECTION 10 - SERIAL & TCP COMMUNICATION ........................................................................................................... 19 10.1 COMMAND FORMAT .......................................................................................................................................... 19 10.2 COMMAND LIST ................................................................................................................................................ 20

10.2.1 Test Initiation Commands ...................................................................................................................... 20

a) Start/Stop Continuity Check – ‘tcc’ ............................................................................................................................. 20 b) Start/Stop Leak Check – ‘tlc’ ....................................................................................................................................... 20 c) Start/Stop Flow Test – ‘tft’ ......................................................................................................................................... 21 d) Start/Stop Purge – ‘tpg’ ............................................................................................................................................. 21 e) Start/Stop Self Test – ‘tst’ .......................................................................................................................................... 21

10.2.2 Runtime Test Parameter Toggle Commands .......................................................................................... 22 a) Channel Selection Mode (Leak Check, Flow Test and Purge ONLY!)– ‘man’ .................................................................. 22 b) Manual Channel Select – ‘mch’ .................................................................................................................................. 23 c) Continuity Check Auto/Manual Mode – ‘ccm’ ............................................................................................................. 23 d) Continuity Check Channel Select – ‘ccc’ ...................................................................................................................... 23 e) Leak Check Units – ‘lcu’ .............................................................................................................................................. 23 f) Flow Test Reference/Run Mode – ‘frr’ ........................................................................................................................ 24

10.2.3 Pre-Test Setup Parameter Commands ................................................................................................... 24 a) Continuity Time – ‘crt’ ............................................................................................................................................... 24 b) Continuity End Wait time – ‘cew’ ............................................................................................................................... 24 c) Continuity Mode – ‘cmo’............................................................................................................................................ 24 d) Continuity Start channel – ‘csc’ .................................................................................................................................. 24 e) Continuity End channel – ‘cec’ ................................................................................................................................... 25 f) Continuity threshold pressure – ‘cth’ .......................................................................................................................... 25 g) Continuity default operating mode – ‘cdo’ ................................................................................................................. 25 h) Leak Check Fill Time – ‘lft’ .......................................................................................................................................... 25 i) Leak Check Stability Time – ‘lst’ .................................................................................................................................. 25 j) Leak Check Test Time – ‘ltt’ ........................................................................................................................................ 26 k) Leak Check Tolerance – ‘lto’ ....................................................................................................................................... 26 l) Leak Check Pipe Length – ‘lpl’ .................................................................................................................................... 26 m) Leak Check Default Units – ‘ldu’ ............................................................................................................................. 27 n) Flow Test Flow Time – ‘fft’ ......................................................................................................................................... 27 o) Purge function Purge Time – ‘ppt’ .............................................................................................................................. 27

10.2.4 Other Commands .................................................................................................................................. 28 a) Query Firmware Version – ‘ver?’ ................................................................................................................................ 28 b) Query Serial Number – ‘ser?’ ..................................................................................................................................... 28 c) Query Last Self Test Result – ‘str?’ .............................................................................................................................. 28

SECTION 11 - WEBSERVER OPERATION ....................................................................................................................... 29 11.1 MAIN SCREEN .................................................................................................................................................. 29 11.2 CHANNEL CFG TAB ............................................................................................................................................. 30 11.3 CONTROL CFG .................................................................................................................................................. 31

SECTION 12 - SERVICE AND CALIBRATION ................................................................................................................... 32 12.1 SERVICE .......................................................................................................................................................... 32 12.2 ADJUSTMENT ................................................................................................................................................... 32 12.3 CLEANING ....................................................................................................................................................... 32

SECTION 13 - APPENDICES ........................................................................................................................................... 33 13.1 APPENDIX A – PIT100-MK2 COMMAND SET SUMMARY ........................................................................................... 33 13.2 APPENDIX B – FACTORY DEFAULT SETTINGS............................................................................................................. 35 13.3 TEST CRITERIA .................................................................................................................................................. 36

13.3.1 Self-Test ................................................................................................................................................ 36 13.3.2 Test Criteria .......................................................................................................................................... 36

Section 1 - Instrument Overview The PIT100-MK2 is designed to be a portable instrument used to perform several different tests to determine and quantify the integrity of tubing looms. It can test for leaks, continuity, blockages and restrictions. The PIT100 can test single lengths of tubing or looms of up to 16 way. The units consist of a set of high accuracy transducers mated with high integrity valves fitted to each channel. The PIT100 uses an internal regulator to introduce gas into the various loom types to determine their condition. Four main functions are available; Leak Test, Continuity, Flow Test and purge. The test and all their configurations can be accessed via the colour LCD display or remotely via the embedded web server. The PIT100 can also be command driven via Ethernet allowing it to be easily incorporated into the user’s software. Connection to the loom is via the 16-way SQDC fitting or the single way AS fitting. Please contact us if you require the mating halves for these connectors. Note: This manual has been written for firmware version 1.0.0.

Section 2 - Specification

2.1 Required Services: Line voltage:

100-240V AC.

Line frequency: 50 ~ 60 Hz. Consumption: less than 50 VA Protection: Gas Supply:

T1.6A anti surge fuse 20x5mm 5-7 bar dry air or nitrogen

2.2 Operating conditions: Operating temperature range:

+5°C to +50°C (40°F to 122°F)

Storage temperature range: -20°C to +70°C (-40°F to 158°F) Maximum Relative humidity: 95% at 50°C (non condensing) Warm up time to full accuracy: 15 minutes (assumes unit already stabilised at ambient and

excludes transducer warm up time).

2.3 Measurement and Outputs: Internal Pressure Measurement:

20 psig full scale.

Test Pressure:

15 psig +/- 2.5psig

2.4 Dimensions:

Measurement: 420mm W x 340mm D x 180mm H (Case closed) Weight:

9kg

Section 3 - Installation and Interconnections

Caution

Ensure correct mains supply rating and polarity This instrument must always be earthed. Do not use this instrument if it is wet or near water. Do not operate a faulty or partially assembled instrument.

3.1 Location This instrument is designed to be sited on a bench top. Therefore, no installation is required. However, care must be taken to ensure the operator has access to the controls and is able to view the display screen without difficulty. Only use the instrument on a stable level surface, such as a bench top.

3.2 Connections

3.2.1 Mains Connection Mains connection is made using an IEC320 type mains connector. The specification of the electrical supply is listed in section 2.1 The instrument must always be earthed via the protective earth conductor on the IEC320 mains connector.

3.2.2 Pneumatic Supply Connect a pneumatic supply (exact specification given in section 2.1) to the port labelled Air Inlet. This fitting is a Swagelok QC4 quick disconnect fitting. Ensure that only clean, dry gas is used.

3.2.3 Ethernet Connection The PIT100-MK2 has a modular connector on the front panel to allow connection of a standard CAT5 patch lead. The PIT100-MK2 supports 100BaseT connection to a host PC. LEDs on the modular connector indicate LINK, a solid-lit lamp indicating a good electrical connection to a host or switch and LAN, a blinking lamp to indicate the movement of data on the active connection. Note that the presence of these LEDs does not confirm that valid data is being transferred, only that data is present.

3.2.4 Port A & Port B Port A and Port B are provided for connection of the looms to be tested. Connection to these is made as required by the test procedures. Port A is a Cable Range type 205. Use a type 206 to mate. Port B is a Chell Instruments Ltd SQDC-R-16-40. Use a SQDC-R-16-0x series to mate.

Section 4 - Front Panel Operation 4.1 Introduction The PIT100-MK2 uses an HMI solution that is a Chell standardised format across several of our products. The HMI consists of an 800x480 TFT LCD colour display with a button membrane consisting of 16 ‘switches’. Each switch has legends on it (and in some cases above it) to indicate the function of the switch. Most switches have some commonality between different screens, as detailed below. For the purpose of the following sub-sections, the switches shall be referred to using the legends on the membrane.

4.2 Flow Set control (Port A Reference) This needle valve is only used during a ‘Flow Test’. On entering a flow test the user is requested to insert a reference part in Port A and to adjust the reference pressure. The reference part can either be a Cablerange AS206 modified to give a conductance similar to the test in hand, or simply a pressure set with no fitting in Port A. If the user is looking to compare multiple tubes, the reference part might be the first in the series, the reference can be adjusted to give a pressure of a round value, 5 psi, for example. The user can then compare the rest of the tubes in the set. It is necessary to set a reference to ensure that the amount of gas being passed during the test is suitable for the load and that a ‘reference’ point is available for checking one loom against another. Turning the Flow Set control clockwise reduces gas flow, turning it counter clockwise increases gas flow. This valve should be left fully open for all other test other than the Flow Test.

4.3 Main screen The main screen that is seen after the start-up splash-screen has been shown is the Leak Check test screen. This is the default selected test on startup. Depending on what the currently selected test is, (Leak, continuity, flow, purge and self-test), dictates what is shown on the main screen. To select a different test, you must push one of the four buttons on the left for; Leak check, Continuity check, Flow test and purge function. To access the Self-Test, you must hit the “Enter” button and then select the first menu option labelled “Self-Test”.

4.4 Device Setup Menu The device setup menu is where you can alter some of the settings for the PIT100-MK2, you can also select the Self-Test from this menu. It is also possible to Rezero all the channels from this menu. To access the device setup menu, you can press the enter button from the main screen when a test is not running.

4.5 Main Test Screens The main test screen for all 5 of the tests is shown on the main screen and is dependent on which test has been selected. From the main test screen using the buttons you can:

• Start/Stop a test. • Access the selected tests setup screen. • Select and deselect a channel whilst in manual mode • Access the device setup menu • Swap between Port A (Single channel) and Port B (16 Channels)

Manual Channel Selection In addition to the above, a Leak Check, Flow Test, and Purge have an additional Auto or Manual channel selection mode. This mode is selectable if Port B is selected in the port selection screen. Manual mode allows the user to select individual channels to perform those tests on (see example of Leak Check screen below in manual mode).

Example of Leak Check Screen when in manual channel selection mode Manual mode for each of the tests (Excluding Self-Test) is selected by an initial press of the open or close buttons on the membrane. When manual mode is chosen, the first channel is highlighted and Manual mode will be displayed in the top left of the main screen. Using the directional buttons, you can move the highlight to select the required channels. The bottom right buttons selects (OPEN) and deselects (CLOSE) a channel. A selected channel is shown with an arrow marker to the left of the channel (see Ch01, Ch02 & Ch04 in above example). The start button is used to finalise (Set) the channels to be used in test and initiate it. The manual selection feature uses the same HMI method for all three tests that have it (Leak Check, Flow Test and Purge). Note that the Continuity Check also has a manual mode but it is slightly different in the fact that once you select a channel (OPEN) that channel is immediately checked for continuity live, you are not required to select multiple channels then start the test.

What follows is a list of all the main test screens and appropriate descriptions of these screens.

Section 5 - Continuity Test

5.1 Introduction

The continuity test is designed to test if the loom under test is connected to the correct channel of the user’s data acquisition system. In its simplest form, the continuity test will pressurise each channel in turn so that the user can establish that it is connected correctly. The PIT100 is indicate is the channel holds pressure (i.e. no gross leak) otherwise it will be labelled as a failure. The continuity test function also has the ability to communicate with an external pressure scanner which is assumed to be connected to the other end of the tubing loom. Currently the TE Netscanner range of pressure scanners is supported for this function although we will be adding the Chell MicroDaq and nanoDaq-LT series for future releases. The communication with an external pressure scanner enables the continuity test to be able to establish if the tubes are connected correctly and ascertain if there is a gross leak.

5.2 Running a Continuity Test

Continuity Check Screen when using Port B

When using Port B, the screen shows all 16 channels of the device, arranged in a 4x4 grid. For Port A mode, a single channel will be displayed. • The Start button starts the continuity check for Auto mode. • The Stop button stops a running test, or quits the continuity results screen and returns to the Main

screen. • The Setup button provides access to the Setup screen for the Continuity Check (When a test isn’t

running). • Open button toggles a channel on to be checked for continuity (when in manual mode). • Close button toggles a channel off (when in manual mode).

In Auto mode when using Port B, the PIT100-MK2 will show a results screen when all 16 channels have been cycled through. This screen is shown below and indicates whether channels passed or failed the check. If they failed then the results page will indicate why they failed - either a crossover with another channel (remote functions only) or no connection/major leak. When using port, A only channel 16’s results will be shown on the results screen (The other channels will report N/C).

Continuity Check Results Screen when using Port B

When using Port A, the screen shows the status of the Cablerange channel only with an appropriate warning message informing the user of this. All button functions are the same as before, although obviously the directional buttons are not used because there is only one channel to deal with. Continuity Check Manual Mode To access manual mode for the continuity test:

• Start in auto mode (auto mode is automatically selected from a test selection using the buttons on the left of the membrane).

• Press either the OPEN or CLOSE buttons to initiate manual mode. A channel selection highlight will appear.

• Using the directional buttons on the right of the membrane you can highlight a channel. • Using the OPEN you can check the continuity of the channel selected. • A red box will be drawn if the channel has failed the check (failed to pressurise due to a gross

leak) and similarly a green box will be drawn if the channel has passed – in manual mode there is no results screen as the test is live.

• Stop manual mode checking using the Stop button (should be done before switching to auto mode or selecting another test)

• To return to auto mode press the Cont button on the left of the membrane.

5.3 Configuring a Continuity Test

This screen sets up the parameters for use during the continuity check: • The Time field sets the amount time that the PIT100-MK2 applies the pre-set pressure to the port

channels, before finishing or moving to the next channel in the sequence (if in auto mode). The allowed range is 1-60 seconds in 1 second intervals.

• End Wait sets an additional time period that the pressure is held for at the end of a test sequence. The range is 0-60 seconds in 1 second intervals.

• Mode sets the type of continuity check. The two settings are Sequence or Stacked. In Sequence mode, pressure is only applied to one channel in the sequence at any one time. In Stacked mode, the pressure is held on all previous channels whilst the continuity check is running up the channels in order.

• Start & End Ch. These settings allow for test a particular range of channels in sequence, in auto mode (e.g. 5-12) rather than running through every single channel. Obviously, value ranges are 1-16 for both start and end. Note that the system will adjust the end channel appropriately if it is set to a channel number less than the start channel.

• Threshold sets the minimum pressure at which the PIT100-MK2 decides a channel is ‘On’. • Operating mode sets the default continuity check mode – Auto or Manual.

Section 6 - Leak Test

6.1 Introduction

The function of the leak test is to perform a pressure decay leak test on the loom under test. This is accomplished by applying a regulated pressure (usually 15 psig) onto the loom under test. Each channel is then individually isolated and the resulting pressure drop measured over a pre-set period of time.

6.2 Leak Rate Units

The PIT100 allows for different ways of expressing the magnitude of any leak detected. These are: • Pressure decay (PSI) • Percentage pressure decay (%) • Pressure decay per minute (PSI/min) • Leak rate (mb.l/s) Any units can be displayed but the percentage pressure decay is always used to determine a pass or fail. The first three units are a simple representation of pressure decay or pressure decay over a period of time. The leak rate units (mb.l/s) is a more sophisticated measurement as it takes into the account the volume of pipe-work under test. The drop in pressure due to a leak is directly proportional to the volume of pipe-work under test so by using these units, the user is able to directly compare the integrity of different volumes or different lengths of pipe-work. The PIT100 gives the user the ability to enter the length of pipe-work under the setting section so this can be used in the mbar.l/s calculation.

6.3 Temperature Effects

The PIT100-MK2 uses the method of measuring pressure decay to ascertain the leak integrity of a system. This is a simple method of leak testing and has the advantage of testing the system at a pressure (rather than vacuum for helium mass spec leak testing). However, the results can be affected by temperature. The relationship between pressure and temperature is linear, with the change in pressure proportional to the change in absolute temperature. These effects are pronounced when trying to measure small leak rates. For example, the test criteria used for the looms is 9.9x10-5 mbar.l/sec (5.8mm3 per minute volume leak) and this equates (for a 5m loom) to a temperature fall of 0.27ºC. If the entire test margin can be accounted for by such a small change in temperature, extreme care must be taken to avoid any change in the ambient temperature during a test. This includes temperature increases as this could mask a leak. Testing should be done in a draft free thermally stable environment and the pipe-work should not be handled immediately before or during a test. Care should also be taken to avoid the warming effects of sun light. If this is not possible then the test criteria must be widened.

6.4 Running a Leak Test

This screen is shown when a Leak Check is selected from the Main screen. As with the continuity check screen, this screen varies slightly depending on whether Port A or Port B is being used.

Leak Check Screen when using Port B (Idle)

When Port B is being used, the screen shows the pressure/leak rate of all 16 channels. The status indicator shows the current state of the channels – Charge, Wait or Test (during the test), Pass or Fail (once the test is complete) – as shown above. Note that before the test is running you can configure the units that the display will show during the test, the display can be changed to show the current pressure (in PSI), the percentage pressure drop or the extrapolated leak rate (in PSI/m - or mb.l/s if a pipe length has been configured) and also percentage. If manual mode was selected prior to starting the test then only those selected channels will change between the aforementioned states – all other channels will remain at the Idle state.

Leak Check Screen when using Port B (Results)

Button functions: • Start and Stop buttons are used to start and stop the test • The setup button takes you to the setup screen for the test • The port button swaps between Port A and Port B (When test is idle) • Open/Close buttons are used to initiate manual mode and then to Select (Open) and Deselect

channels.

• Leak button will return the mode back to auto (when test is idle)

Leak Check Screen when using Port A

When using Port A, the screen shows the pressure and leak status of the Cablerange channel only with an appropriate warning message informing the user of this. All button functions are the same as before, although obviously the directional buttons are not used because there is only one channel to deal with. The status changes as with Port B, from Charge, to Wait, to Test, to Pass or Fail, as appropriate, during the test.

6.5 Configuring a Leak Test

This screen allows for setup of the actual parameters for the leak check. The various fields are as follows: • Fill Time sets the time that the internal valve is opened to apply the test pressure of 15psi on the

appropriate connector. This can range from 5-600 seconds in increments of 5 seconds. • The Stab. (Stability) Time sets the amount of time that the test waits after filling before starting the

timer to measure the decay pressure. This is to ensure the pressure in the pipework equalises. Again, the range is 5-600 seconds in 5 second intervals.

• The Test Time is the amount of time the actual decay test runs for. This can be set in intervals of 10 seconds, ranging from 10 to 600 seconds.

• Tolerance is the percentage difference between the start and end pressures of the leak check. If the end pressure difference falls outside this percentage then the leak check fails. Valid values are 0.00%-99.99%

• Pipe Len (length) can be set (and is necessary) if the required units of measure is millibar-litres per second. This setting can be 0-20000mm.

• Units sets the default leak check units – PSI, PSI/m, Percent or mbl/s (the last units are only selectable if a valid pipe length is set).

Section 7 - Flow Test

7.1 Introduction

The flow test functions by applying a set flow of gas into the end of the loom under test and it assumes that the other end of the pipe-work is left open. The pressure present on end of the loom under test will be dependent on the flow of gas through it. This test is therefore used to detect abnormalities in the loom such as restrictions or breaks which give a different flow of gas and therefore a different measures pressure. In order to be able to test a variety of loom types, the PIT100 gives you the ability to control the flow of gas onto the end of the loom to give you an appropriate pressure reading. We would recommend that the measured pressure is in the range of 5 to 15 psig. This control is via the needle valve on the front panel. To set this, a representative piece of tubing in connected to the single way port – part A. Then enter reference mode (see below) and adjust the needle valve to give you an appropriate pressure. Note this pressure. If the needle valve is kept where is it, this same flow of gas will be applied to all subsequent tests. The user can then note the resulting pressure and determine if the loom has passed this test or not. We do not impose any test limits on this test so there are no pass / fail criteria. This is because this test can capture a variety of issues so it is the user’s responsibility to determine the success of a test.

7.2 Running a Flow Test This screen is shown when a Flow Test is selected from the Main screen. Again, this screen varies slightly between the use of Port A and Port B.

Flow Test Screen in Ref mode (during reference setting)

Flow Test Screen in Run mode when using Port B

When using Port B, the screen shows the back pressure on each of the 16 channels. For testing on Port B, the flow test will cycle through each channel in turn, updating the appropriate channel pressure on the screen and will end automatically when all 16 channels have been cycled through. If manual selection mode was chosen prior to running the test then the cycle will jump over any channels not selected, entering 0.000 next to that channel on the screen. Button functions:

• Start and Stop buttons are used to start and stop the test • The setup button takes you to the setup screen for the test • The port button swaps between Port A and Port B (When test is idle) • Open/Close buttons are used to initiate manual mode and then to Select (Open) and Deselect

channels. • Flow button will return the mode back to auto (when test is idle)

This function includes the ability to set a Reference pressure using the needle valve on the front of the PIT100. To access Ref Set mode, press the Setup button (when the test is not running), and then the Setup button again (the word Ref is shown over the button, on the screen). From here follow the instructional messages that are displayed on the screen. The Start button is used to move through the procedure steps and at the final step will also automatically start the flow test (without the need to back out of the Ref Set and Setup screens) When using Port A, the screen shows the back pressure of the Cablerange channel only with an appropriate warning message informing the user of this. All button functions are the same as before, although obviously the arrow buttons are not used because there is only one channel to deal with. The screen in Ref mode is the same irrespective of whether Port A or Port B is being used for the Flow Test.

For testing on Port A, the Flow Test will run indefinitely until the user presses Stop to halt the test.

7.3 Configuring a Flow Test

This screen shows the setup parameters for the Flow Test. The only parameter here is as follows: • Flow Time sets the time that gas is flowed per channel during the test, when using Port B. This setting

is irrelevant when using Port A because the Flow Test runs indefinitely until the user stops it. Note: Reference Set mode is also accessed from this screen by pressing the Setup button

Section 8 - Purge

8.1 Introduction The purge function is designed to run gas through the loom to remove any contaminant – usually moisture. Like the continuity test, this test will apply gas to all channels (or a subset of channels if manual mode is used) for a pre-set amount of time.

8.2 Running Purge This screen is shown when Purge is selected from the Main screen. Once again, this screen differs slightly between Port A & Port B selection.

Purge Screen when using Port B This screen simply shows the current pressure of each of the channels before and during a purge function. Button functions:

• Start and Stop buttons are used to start and stop the test • The setup button takes you to the setup screen for the test • The port button swaps between Port A and Port B (When test is idle) • Open/Close buttons are used to initiate manual mode and then to Select (Open) and Deselect

channels. • Purge button will return the mode back to auto (when test is idle)

When using Port A, the screen shows the status of the Cablerange channel only with an appropriate warning message informing the user of this. All button functions are the same as before, although obviously the directional buttons are not used because there is only one channel to deal with.

8.3 Configuring Purge

This screen shows the setup parameters for the Purge function. The only parameter here is as follows: • Purge Time sets the time that gas is flowed through the channel(s) during the purge. The function is

automatically stopped once this time has elapsed. The valid range is 1 to 60 minutes.

Section 9 - Setup Screens All the setup screens are provided for configuration of the PIT100-MK2 tests and various component parts, which includes comms and scanner setup. In all screens, the user interface is the same and has two ‘modes’ of operation.

• When first entering the screen, we start in Select mode. In this mode the up and down panel buttons (indicated by the arrows) allow for navigation between the setup parameters. The exit button returns you back to the main screen. The Enter button changes to Edit mode for the currently selected parameter.

• In Edit mode the edit cursor appears at the first editable character for the parameter (the edit cursor is a line above and below the character). If the parameter has multiple editable characters (e.g. when entering a number) then the right-hand panel buttons (indicated by left and right arrows) allow for moving the edit cursor left and right across the characters. The up and down buttons are used to actually change the parameter – the values allowed differ depending on the setup parameter being changed – these are detailed with the setup screen list below. The top right button quits Edit mode, undoing any changes that may have been made. The exit button ends edit mode and accepts any changes made.

Here follows a list of the various setup screens with details of the parameters including their allowed values.

9.1 Comms Setup

This screen allows for configuration of the Ethernet comms of the PIT100-MK2 – specifically the IP address and subnet mask. All individual numbers can be changed, but if an invalid octet is entered (i.e. greater than 255) then the octet will cap at 255 when the bottom right button is pressed to exit Edit mode.

9.2 Self-Test This screen is shown when Self-Test is selected from the Main screen. It simply shows information, detailing the current stage of the self-test – these stages include running through each channel checking for continuity and also a complete leak check (Charge, Wait, Test). The information line updates accordingly as the stages are run and includes countdown timers as appropriate to show how long is left of the various stages.

Self-Test Screen whilst running

Once the test has finished, the screen shows the results of the checks for each channel.

Self-Test Results Screen

Button functions • Start and Stop buttons are used to start and stop the test. • Use any of the test select buttons on the left to exit the self-test (when not running)

Please note that, as with other tests, the self-test does still require some user interaction – e.g. fit/remove blank – it is not completely autonomous.

9.2.1 Self-Test Parameters

The Parameters for the self-test are hardcoded and are as follows: Charge time : 10 seconds Stabilisation time : 10 seconds Test Time : 60 seconds Pass / fail criteria : 10% over the 60 seconds

The self-test criteria is set at the relatively large 10% per minute to prevent any thermal effects seen by the PIT100-MK2 causing false failures. This test can be supplemented by a leak test (with or without the loom) to produce a ‘leak floor’ that the PIT100-MK2 can then be known to test leak rates higher than this.

9.3 Factory Defaults Confirm Screen

This screen appears when selecting the Factory Default item from the Miscellaneous Menu screen. There will be a prompt asking you to confirm the default If actioned, all settings are returned to their factory defaults (see Error! Reference source not found. in Appendix B). When the default has finished, a message will appear on the screen asking the user to reset the device.

9.4 Menu Lockout Screen

This screen appears when selecting the Menu Lockout item from the Miscellaneous menu screen. From this screen you can set a pin of up to 6 digits which will then be required to enter the PIT100’s main menu or clear the pin so that no pin is required to access the PIT100 main menu.

Section 10 - Serial & TCP Communication The PIT100-MK2 has a set of remote commands that can be issued to perform just about every function that exists on the PIT100-MK2 front panel. The remote interface available on the PIT100-MK2 is TCP/IP comms. To connect, the Host PC should communicate with remote port 101.

10.1 Command format The remote commands use the Chell ASCII command protocol format as is used in other Chell microprocessor products with remote interfaces. The commands are all lower case and start with the letter ‘a’, followed by three characters (and a question mark for queries) and then a space followed by a list of commas separated parameters, where applicable, as follows:

Format: accc[?] [p1][,p2]...[,pn]¿ … where ‘ccc’ = command/query, ‘?’ = query identification; ‘pn’ = parameter(s). Every command and query sent on the comms port is acknowledged with an appropriate reply which includes an echo of the command/query and parameters sent, lines of data (if requested via a query) and an acknowledge code. This reply block is the same for anything sent to the PIT100-MK2 and is as follows. (‘¿’ indicates a carriage return/line feed pair): For a command: *a*:<cmd>;<params>¿ !a!<response>!¿

For a query: *a*:<cmd>?;<params>¿ <data>¿ !a!<response>!¿

where: <cmd> is the command/query (query identified by a ‘?’ after the three chars) <params> is the comma separated parameter list, if any <response> is the acceptance indicator.

<data> is the data requested if a query was sent. Note the data usually consists of some identification string, in CAPS, followed by a colon (:) and then the actual data. Some queries return multiple lines of information. See individual commands for details as appropriate.

The acceptance indicator is a single character as follows: • ‘o’ = OK: if the command/query was recognised and accepted; • ‘b’ = BADCMD: if the command/query was not recognised or has incorrect/invalid parameters • ‘e’ = ERROR: if there was some internal comms error. • ‘w’ = BUSY: if the comms is currently busy.

10.2 Command List

10.2.1 Test Initiation Commands

When these commands are issued, the front panel screen changes to show the appropriate test (if it’s not already on that screen). The text REMOTE is shown in the bottom middle of the screen to indicate that the previous command (either a start or a stop) was sent from remote comms.

a) Start/Stop Continuity Check – ‘tcc’ This command is used to start or stop the continuity check. It takes one parameter which is as follows:

0 = Stop test 1 = Start test on port A (Cablerange) 2 = Start test on port B (SQDC)

The test returns when it has started, when it is changing channels and when it has finished, including the results of each channel, as follows: CC:STARTED CC:CH01 CC:CH02 ... CC:CH16 CC:RESULTS CH01: PASSED CH02: PASSED CH03: X -> 16 ... CH15: N/C OR LEAK CH16 X -> 3 CC:FINISHED

... In all cases ‘CC:’ is the header to indicate its continuity check information. A ‘X’ followed by a number indicates that the channel was found to be crossed with another channel (as indicated by the number after the ‘->’). ‘N/C OR LEAK’ indicates a channel that was either not connected or has a massive leak meaning the pressure drops below the threshold setting during the test of that channel.

b) Start/Stop Leak Check – ‘tlc’ This command starts and stops the leak check test. It takes two parameters, the first of which is a number between 0-3 indicating whether the test is to be stopped or started using a specific profile: 0 = Stop test

1 = Start test with Port A profile 2 = Start test with Port B profile

The second (optional) parameter is either 0 or 1, to set what is shown when the test finishes: 0 = Pass or Fail. This is the default (i.e. no second parameter). The test simply returns: LC:PASSED ...or... LC:FAILED;<failed chans> ... where <failed chans> is a comma separated list of any channels that failed the leak test. For failed tests with the Port A & Bar Ref profiles, the PIT100-MK2 just returns LC:FAILED.

1 = Pass/Fail status and reading (in currently set units) of each channel (Port B), as follows:

LC:<ch1 status><ch1 reading>,...,<ch16 status><ch16 reading>

.. where the <chN reading> is the pressure difference between the start and end of the test (∆PSI) or the total leak rate over the test (PSI/m or mbl/s); and the <chN status> is a single character: ‘p’ – if the test passed for that channel, ‘f’ – if the test failed for that channel For tests with the Port A profile, a single status & channel reading are returned. For tests with Port B in manual selection mode, all channels not selected are shown with a reading of 0.000 and a status of ‘i’ (for idle).

c) Start/Stop Flow Test – ‘tft’ This command is used to start and stop the flow test. It takes two parameters as the previous test command. The first stops and starts the test on a particular port, as follows: 0 = Stop test

1 = Start test on port A (Cablerange) 2 = Start test on port B (SQDC)

The second (optional) parameter dictates whether the test shows continuous output or not during the test (whilst in Run mode only): 0 = No continuous output. This is the default setting if no second parameter is passed. When the test is stopped by the user or reaches the end of the Port B sequence it outputs one line of flow readings in the same format as for continuous output, as shown below. 1 = Continuous output every 500ms. The PIT100-MK2 returns an ASCII string of the pressures (PSI) of all 16 channels, when using port B. If using port A, a single channel is output: FT:<ch1 reading>,<ch2 reading>,...,<ch16 reading> For tests with Port B in manual selection mode, all channels not selected are shown with a reading of 0.000

d) Start/Stop Purge – ‘tpg’ This command starts and stops the purge function. It takes one parameter which is as follows:

0 = Stop test 1 = Start test on port A (Cablerange) 2 = Start test on port B (SQDC)

The function will return when it has started and finished, as follows: PG:STARTED PG:FINISHED ... In all cases ‘PG:’ is the header to indicate it’s purge function information.

e) Start/Stop Self Test – ‘tst’ This command starts and stops the self test. Again there are two parameters. The first starts and stops the test: 0 = Stop test 1 = Start test The second (optional) parameter dictates how verbose the Self Test output is: 0 = Minimum output. The Self Test simply outputs the results lines when the test has finished, one line for each channel: ST:RESULTS: CH<n>: CONT: <result> ; LEAK: <result>

.. where <n> is the channel number (01–16) and <result> is either OK or FAIL 1 = Verbose output. The Self Test outputs various ASCII strings as the test is progressing: Firstly, continuity for each channel: ST:CONTINUITY CH<n> ... where <n> is the channel being checked Then, for each leak check stage: ST:LEAK CHECK: <stage> ... where <stage> is CHARGE, WAIT, or TEST Then, at the end of the test, the results in the same format as with minimum output above. ST:RESULTS: CH<n>: CONT: <result> ; LEAK: <result>

Finally finishing with: ST:FINISHED

10.2.2 Runtime Test Parameter Toggle Commands

a) Channel Selection Mode (Leak Check, Flow Test and Purge ONLY!)– ‘man’ This command is used to toggle the manual channel selection mode for a leak check, flow test or purge. If the command is issued whilst a test is in progress then a BADCMD error is returned. It takes two parameters, the first indicating the test to be toggled: 1 = Leak Check 2 = Flow Test 3 = Purge ... and the second indicating the mode: 0 = auto mode 1 = manual mode The current selection mode of all relevant tests can be retrieved using the query ‘man?’. The returned data is: LC CHAN SEL MODE: <mode> FT CHAN SEL MODE: <mode> PG CHAN SEL MODE: <mode> ... where <mode> is either AUTO or MANUAL and ‘LC’, ‘FT’ & ‘PG’ indicate leak check, flow test and purge, respectively.

b) Manual Channel Select – ‘mch’ This command can be issued to toggle a channel on or off for the test in question. It takes two parameters, the first is the test: 1 = Leak Check 2 = Flow Test 3 = Purge ... and the second is the channel number from 1 to 16. If this command is issued when a test is already running the a ‘BADCMD’ error is returned. If the command is issued for a test that is in Auto selection mode, then again a ‘BADCMD’ error is returned along with a description indicating the test is in auto selection mode. Any selections made with this command will be overridden if auto selection mode is subsequently selected for the test in question, or the test is subsequently started on Port A.

c) Continuity Check Auto/Manual Mode – ‘ccm’ The mode of the continuity check can be changed using this command. If the command is issued whilst a test is in progress then a BADCMD error is returned. It takes one parameter as follows: 0 = auto mode 1 = manual mode The current mode of the continuity check can be retrieved using the query ‘ccm?’. The returned data is: CC MODE: <mode> ... where <mode> is either AUTO or MANUAL.

d) Continuity Check Channel Select – ‘ccc’ Whilst running a continuity check in manual mode, this command can be used to toggle a channel on or off (depending on its previous setting). If used when running a test on Port B, it takes one parameter which is the channel number (1-16).

e) Leak Check Units – ‘lcu’ The units used in the leak check test can be one of three values. This command can be used to select those units. This command only changes the units of the current (or last used) profile and it does not flag for storage to EEPROM (use the ‘ldu’ command further on for that). The command has one parameter, which is: 0 = PSI 1 = PSI/min 2 = mbl/sec Note that if the parameter passed is ‘2’ and the leak check pipe length parameter (for the current profile) is set to 0, then a BADCMD error is returned. The pipe length is needed to use mbl/sec units and as such must be set to a non-zero value first (see front panel operation or ‘lpl’ command later). The current leak check units can be retrieved using the query ‘lcu?’. The returned data is as follows: LC UNITS: <units> ... where <units> is either PSI, PSI/min or mbl/sec.

f) Flow Test Reference/Run Mode – ‘frr’ Use this command during a flow test to change the mode of the flow test between reference and run. The command takes one parameter: 0 = Reference mode 1 = Run mode The current mode can be retrieved by using the query ‘frr?’. The data returned is: FT MODE: <mode> ... where <mode> is either REFERENCE or RUN.

10.2.3 Pre-Test Setup Parameter Commands All of the settings available under the Setup menu for each test can be changed using the following remote commands. Note that when settings are changed with any of the following, they are NOT stored to non-volatile memory until the ‘ees’ command is issued. If power is removed from the PIT100-MK2 before the ‘ees’ command is issued then any changes made by these commands will be lost.

a) Continuity Time – ‘crt’ This command changes the setup parameter for the time that the pressure is applied per channel during the continuity check. The one parameter is an integer value from 1-60 seconds. The current time setting can be retrieved with the query ‘crt?’. Data returned is: CC TIME: <time> seconds

b) Continuity End Wait time – ‘cew’ This command changes the setup parameter for the additional wait time that can be applied at the end of the continuity test before pressure is removed. It takes one parameter which is an integer value from 0-60 seconds. The current end wait time setting can be retrieved using the query ‘cew?’. The returned data is: CC END WAIT: <time> seconds

c) Continuity Mode – ‘cmo’ Use this command to change the mode of operation parameter of the continuity check. The one parameter signifies the mode, as follows: 0 = Sequence mode 1 = Stacked mode The current mode is retrieved with the query ‘cmo?’. The data returned is as follows: CC MODE: <mode> .. where <mode> is either SEQUENCE or STACKED.

d) Continuity Start channel – ‘csc’ This command changes the start channel setup parameter for the continuity check. It has one parameter which is an integer number from 1-16. The current start channel setting can be retrieved using the query ‘csc?’. Returned data is: CC START CH: <channel number>

e) Continuity End channel – ‘cec’ This command changes the end channel setup parameter for the continuity check. It has one parameter which is an integer number from 1-16. The current end channel setting can be retrieved using the query ‘cec?’. Returned data is: CC END CH: <channel number>

f) Continuity threshold pressure – ‘cth’ This command changes the threshold pressure used during the continuity check – that is the pressure at which the channel must reach before it is deemed to be ‘On’. The command takes one parameter, which is the threshold pressure in PSI, between 1.0 PSI and 15.0 PSI. The current threshold pressure can be retrieved using the query ‘cth?’. The data returned is: CC THRESHOLD: <threshold in PSI>

g) Continuity default operating mode – ‘cdo’ This command changes the default operating mode (that is, the mode that the continuity check is set to on power up). This command takes one parameter which is: 0 = auto mode 1 = manual mode The current default operating mode can be retrieved using the query ‘cop?’. Returned data is: CC DEF MODE: <mode> ... where <mode> is either AUTO or MANUAL.

.

h) Leak Check Fill Time – ‘lft’ Use this command to change the time that the internal valve remains open, for applying the test pressure on the connector. The command has two parameters, the first of which is the profile number: (Current firmware only supports a single profile for both ports) 0 = Port A and Port B

... and the second parameter which is the time and can be from 5-600 seconds. Note that the value for this setting has a granularity of 5, so any value entered that isn’t a multiple of 5 will be rounded accordingly. The current fill time setting is retrieved for all profiles using the query ‘lft?’. The data returned is: LC FILL TIME (<Port A/B>): <time> seconds

i) Leak Check Stability Time – ‘lst’ This command changes the stability time setup parameter (the time the PIT100-MK2 waits after ‘filling’ before starting the test timer). Again It has two parameters, the first being the profile: (Current firmware only supports a single profile for both ports) 0 = Port A and Port B ... and the second being the time which can be a value from 5-300 seconds. Note that the value for this setting has a granularity of 5, so any value entered that isn’t a multiple of 5 will be rounded accordingly.

The current stability time for all profiles can be retrieved with the query ‘lst?’. The data returned is: LC STAB TIME (<Port A/B>): <time> seconds

j) Leak Check Test Time – ‘ltt’ This command changes the test time setup parameter for the amount of time the actual leak test runs for after the fill and stability periods. The first of two parameters is again the profile number: (Current firmware only supports a single profile for both ports) 0 = Port A and Port B ... and the second is an integer value between 10 and 600 seconds. Note that the value for this setting has a granularity of 10, so any value entered that isn’t a multiple of 10 will be rounded accordingly. The current test time, for all profiles, can be found by using the query ‘ltt?’. The returned data is: LC TEST TIME (<Port A/B>): <time> seconds

k) Leak Check Tolerance – ‘lto’ Use this command to change the tolerance percentage setting (the % difference between leak check start and end pressures, that is allowed for the leak check to pass). It takes two parameters, the first of which is the profile: (Current firmware only supports a single profile for both ports) 0 = Port A and Port B

... and the second which is a floating point value that can be from 0.05 to 99.95%. The granularity of this value is 0.05% so any entered value that is more precise will be rounded accordingly. To retrieve the current tolerance percentage for each profile, use the query ‘lto?’. The data returned is: LC TOLERANCE (<Port A/B>): <tolerance percentage> %

l) Leak Check Pipe Length – ‘lpl’ This command is used to set a known pipe length so that the mbl/sec units can be used in the leak test. A setting of 0 (the default) assumes no pipe length is known, and as such the mbl/sec units will not be able to be set using the front panel or the ‘lcu’ command (above). The two parameters for this command are the profile: (Current firmware only supports a single profile for both ports) 0 = Port A and Port B

... and the length, given in millimetres, from 0-20000. The current pipe length for each profile is retrieved with the query ‘lpl?’ and the data that is returned is: LC PIPE LENGTH (<Port A/B >): <pipe length> mm

m) Leak Check Default Units – ‘ldu’ Use this command to select the default leak check units (that is, the display units that the leak check is set to on power up) for each profile. It has two parameters, which are: (Current firmware only supports a single profile for both ports)

0 = Port A and Prot B ... and ... 0 = PSI 1 = PSI/min

2 = Percent 3 = mbl/sec Note that if the second parameter passed is ‘3’ and the current leak check pipe length parameter for the given profile is set to 0, then a BADCMD error is returned. The pipe length is needed to use mbl/sec units and as such must be set to a non-zero value first (see front panel operation or ‘lpl’ command above). The current default leak check units for all profiles can be retrieved using the query ‘ldu?’. The returned data is as follows:

LC DEF UNITS (<Port A/B>): <units> ...where: <units> is either PSI, PSI/min, Percent or mbl/sec.

n) Flow Test Flow Time – ‘fft’ This command is used to set the time that gas is flowed on each channel during a Flow Test on Port B (this setting is ignored when testing on Port A). The one parameter is the time which can be between 1 & 60 seconds. The current flow time can be retrieved using the query ‘fft?’. The data returned is: FT TIME: <time> seconds

o) Purge function Purge Time – ‘ppt’ This command is used to set the time that gas is flowed during a Purge function. The one parameter is the time which can be between 1 & 60 minutes. The current purge time can be retrieved using the query ‘ppt?’. The data returned is: PG TIME: <time> minutes

10.2.4 Other Commands

a) Query Firmware Version – ‘ver?’ This query returns the current firmware version numbers, as reported on comms when the PIT100-MK2 starts up. The returned string is as follows: VER: PIT100-MK2;<firmware version>

b) Query Serial Number – ‘ser?’ This query returns the serial number of the PIT100-MK2 that was assigned before it left the factory. The returned data is: SER: <serial number>

c) Query Last Self Test Result – ‘str?’ This query returns the result of the last Self Test for information purposes. The returned data is either: LAST ST: <result> ... where <result> is either PASSED, FAILED or UNTESTED

Section 11 - Webserver Operation The webserver is an easy way for the user to change the device and test settings and to access channel data. The webserver can be accessed by entering the device IP Address into a browser URL bar. The webserver is divided into multiple sections (Pages) that control different aspects of the device. Note the Factory Tools page is password protected and beyond the scope of this manual.

11.1 Main screen The main screen/ Live Data is the first page the user will see upon opening the webserver. Along the top the tabs are always visible and allow the user to navigate between pages. The sidebar is also always visible, allowing the user to start and stop tests, it is also possible to rezero all channels and change the selected test.

11.2 Channel cfg tab The channel Config page is where you can change the test settings for each of the tests as you would on the setup screen on the HMI, all 4 tests are split into 4 different sections. The following screenshots indicate the test setup sections. Leak Check setup Fill Time, Stability Time & End Time are in seconds Minimum Pressure threshold is in psi

Continuity Check setup. Time and End wait are in seconds Threshold is in psi

Flow Test & Purge Function setup. Flow time is in seconds. Purge time is in minutes.

11.3 Control Cfg From this tab the user can change the TCP IP Address and the subnet mask of the device.

Section 12 - Service and Calibration

12.1 Service

There are no user serviceable parts inside the instruments. Should any difficulties be encountered in the use of the PIT100-MK2, it is recommended that you contact Chell Instruments Ltd for advice and instructions.

12.2 Adjustment

There are no user adjustments in the instrument, indeed, the presence of lethal voltages within the instrument means that the user is strictly forbidden from removing the covers. If the internal test pressure regulator requires adjustment you should contact Chell Instruments Ltd.

12.3 Cleaning

A dirty instrument may be wiped clean with a soft cloth that has been sprayed with a proprietary ‘foaming cleaner’, then wiped dry immediately.

Under no circumstances should the instrument be wetted directly or left damp

Section 13 - Appendices 13.1 Appendix A – PIT100-MK2 Command Set Summary Purpose Cmd Query Parameters Notes Start/Stop Continuity Check tcc --- 0-2 P1: 0 = Stop test

1 = Start test on Port A (Cablerange) 2 = Start test on Port B (SQDC)

Start/Stop Leak Check tlc --- 0-3,[0-1] P1: 0 = Stop test 1 = Start test with Port A profile 2 = Start test with Port B profile P2 (optional): 0 = Show PASS/FAIL when complete 1 = Show channel readings and status when complete

Start/Stop Flow Test tft --- 0-2,[0-1] P1: 0 = Stop test 1 = Start test on Port A (Cablerange) 2 = Start test on Port B (SQDC) P2 (optional): 0 = No continuous output 1 = Continuous output

Start/Stop Self Test tst --- 0-1,[0-1] P1: 0 = Stop test 1 = Start test P2 (optional): 0 = Minimum output 1 = Verbose output

Channel Selection mode (for leak check, flow test and purge ONLY!)

man man? 1-3,0-1 P1: 1 = Leak Check 2 = Flow Test 3 = Purge P2: 0 = Auto selection mode 1 = Manual selection mode

Manual channel selection mch 1-3,1-16 P1: 1 = Leak Check 2 = Flow Test 3 = Purge P2: Channel number

Continuity Check auto/manual mode

ccm ccm? 0-1 P1: 0 = Auto mode 1 = Manual mode

Continuity Check channel select

ccc --- 1-16 P1: Channel number

Leak Check current units lcu lcu? 0-2 P1: 0 = PSI, 1 = PSI/m, 2 = Percent, 3 = mbl/sec (pipe length must be > 0 to select mbl/sec)

Flow Test ref/run mode frr frr? 0-1 P1: 0 = Reference mode 1 = Run mode

Continuity Check apply time crt crt? 1-60 P1: Time in seconds Continuity Check end wait time

cew cew? 0-60 P1: Time in seconds

Continuity Check mode cmo cmo? 0-1 P1: 0 = Sequence mode 1 = Stacked mode

Continuity Check start chan csc csc? 1-16 P1: Channel number Continuity Check end chan cec cec? 1-16 P1: Channel number Continuity Check threshold cth cth? 1.0-15.0 P1: ‘On’ pressure threshold, in PSI Continuity Check default operating mode

cdo cdo? 0-1 P1: 0 = Auto mode 1 = Manual mode

Continuity Check external brick configuration

cex cex? 0-9999 or xxx.xxx.xxx.xxx

P1: PBS number or IP address

Leak Check fill time lft lft? 0,5-600 P1: 0 = Port A/Port B profile P2: Time in seconds (in 5 sec increments) Query returns fill time of all profiles

Leak Check stability time lst lst? 0,5-300 P1: 0 = Port A/Port B profile P2: Time in seconds (in 5 sec increments) Query returns stability time of all profiles

Leak Check test time ltt ltt? 0,10-600 P1: 0 = Port A/Port B profile P2: Time in seconds (in 10sec increments) Query returns test time of all profiles

Leak Check tolerance lto lto? 0, 0.05-99.95

P1: 0 = Port A/Port B profile P2: Percentage in 0.05% increments Query returns tolerance of all profiles

Leak Check pipe length lpl lpl? 0, 0-20000

P1: 0 = Port A/Port B profile P2: Length in millimetres Query returns pipe length of all profiles

Leak Check default units ldu ldu? 0,0-3 P1: 0 = Port A/Port B profile P2: 0 = PSI, 1 = PSI/m, 2 = Precent, 3 = mbl/sec (pipe length must be > 0 to select mbl/sec) Query returns default units of all profiles

Flow Test flow time fft fft? 1-60 P1: Time in seconds Purge function purge time ppt ppt? 1-60 P1: Time in minutes Firmware version --- ver? Returns: VER: PIT100-MK2;<firmware

version> Serial number --- ser? Returns: SER:<serial number> Last Self Test result --- str? Returns: LAST ST: <res>

<res> is PASSED, FAILED or UNTESTED

13.2 Appendix B – Factory Default Settings

Setting Default Value Additional Information Continuity Check apply time

5 in seconds

Continuity Check end wait time

5 in seconds

Continuity Check mode

0 Sequence mode

Continuity Check operating mode

0 Auto mode

Continuity Check start channel

1

Continuity Check end channel

16

Continuity Check ‘On’ threshold pressure

8.0 in PSI

Leak Check fill time

5 (profile A & B) in seconds

Leak Check stability time (all profiles)

60 in seconds

Leak Check test time (all profiles)

60 in seconds

Leak Check tolerance (all profiles)

0.33%

Leak Check minimum pressure (all profiles)

7.0 in PSI

Leak Check pipe length (all profiles)

0 no pipe length

Leak Check units (all profiles)

0 PSI units

Flow Test flow time

5 in seconds

Purge function purge time

10 in minutes

13.3 Test Criteria

13.3.1 Self-Test Section 5.8 describes the self-test criteria. This will test the leak integrity of the PIT100-MK2 and ensure its readiness to test to the criteria stated. As documented, the self-test criteria is 10% of the test pressure in 60 seconds. With an internal volume of 850mm3, this equates to a volume leak of 17mm3 of gas per minute. NOTE : Chell test the PIT100-MK2 systems to a volume leak rate of less than 5.7mm3 per minute during manufacture (without any additional volume added). These tests are carried out in a temperature controlled environment.

13.3.2 Test Criteria

The following table and graph show the various test criteria used. It also shows the equivalent temperature change to produce the same leak rate (assuming the temperature is falling). The table below highlights the temperature effects and suggests some minimum test tolerances used for various temperature environments.

Table Showing the Interrelation of the Test Criteria and temperature effects.

PIT1

00-M

K2 Lo

om S

pec

SQDC

Spe

c

PIT1

00-M

K2 C

hell

Test

(0

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15)

TE /

Chel

l Sc

anne

r Spe

c

PIT1

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K2 S

elf-T

est

Spec

Loom

Leng

th

Test

Vol

ume

Percentage Drop (%FS/min) 0.01 0.02 0.092 0.147 0.33 0.67 1 2 m mm3

Volume Leak (mm3 per min) 5.70 17.00 0.00 PIT100-MK2 Only 850

Volume Leak (mm3 per min) 0.43 0.86 3.98 6.35 14.27 28.96 43.23 86.46 2.50 4323 Volume Leak (mm3 per min) 0.63 1.26 5.78 9.24 20.74 42.11 62.85 125.70 5.00 6285 Equivalent Temperature Change (ºC) 0.03 0.06 0.27 0.43 0.97 1.96 2.93 5.86

Table Showing the effects of average temperature change and suggested minimum test tolerances.

Environmental temperature Change (±ºC) 0.1 0.2 0.5 1 2 5 Apparent volume leak in 5m loom (mm3/min) 2.15 4.29 10.73 21.45 42.90 107.25 Equivalent min leak rate (%FS/min) 0.03% 0.07% 0.17% 0.34% 0.68% 1.71% Suggested minimum test tolerance (%FS/min) 0.10% 0.20% 0.51% 1.02% 2.05% 5.12%

integrity test set pit100-mk2...chell instruments ltd folgate house folgate road north walsham...

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