anexo cy688 series oxygen analyzer instruction manual

CY688 Series Oxygen Analyzers

Instruction Manual

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Oxygen Analyzer Instruction Manual

Contents

1. Introduction ................................................................................................................................................................ 1

1.1 Instrument ................................................................................................................................................................ 1

1.2 Sensor ....................................................................................................................................................................... 1

1.3 Application Range .................................................................................................................................................. 1

2. Technical Specifications ......................................................................................................................................... 1

3. Installing the Analyzer ............................................................................................................................................. 3

3.1 Open the package and check with eyes ........................................................................................................... 3

3.2 Instrument Installation .......................................................................................................................................... 3

3.3 Connection Ports.................................................................................................................................................... 4

3.4 Sensor Installation ................................................................................................................................................. 5

3.5 The Connection of Sampling Gas Paths .......................................................................................................... 5

4. Debugging .................................................................................................................................................................. 7

4.1 Turn on the Instrument.......................................................................................................................................... 7

4.2 Program Design ...................................................................................................................................................... 7

4.2.1 Set Alarm Points .................................................................................................................................................. 7

4.2.2 Set Alarm Mode.................................................................................................................................................... 8

4.2.3Return to Standard Measuring Mode .............................................................................................................. 9

4.2.4 Set Output Value................................................................................................................................................ 10

4.2.5 Calibration............................................................................................................................................................11

5. Setting Alarm Value................................................................................................................................................ 12

6. Spare Parts and Maintenance .............................................................................................................................. 13

7. Transportation and Storage ................................................................................................................................. 13

7.1 Transportation ....................................................................................................................................................... 13

7.2 Storage .................................................................................................................................................................... 13

8. A complete set of the instrument ....................................................................................................................... 14


Notices

1. Please read this manual prior to using the analyzer to insure safe and proper operation.

2. Installation and maintenance should be undertaken by the qualified person.

3. To reduce the electrical noise, all signal circuits should be far away from cable with strong electricity

and relay with big power.

4. Make sure the voltage of power supply is complied with the analyzer’s voltage, and electrical-wire is

connected correctly, the power can be switch on.

5. DO NOT use this analyzer in that occasion where exists flammable or explosive gas.

6. The contents of this instruction may be modified without further notification.


CY688 Series Oxygen Analyzers Instruction Manual

1. Introduction

1.1 Instrument

CY688 series oxygen analyzers are a kind of intelligentized instruments in which the microprocessor plays a key

role. An analyzer has a programmable alarm points, one programmable electric current (4-20mA) output port, and

one RS232 data communication port (optional part). According to the different sensors mounted in the oxygen

analyzer, it can accurately measure the oxygen concentration from 100ppm to 100% in nitrogen and oxygen

mixture gas.

1.2 Sensor

The sensor used in the oxygen analyzer is the imported solid ion current oxygen sensor, which has such

remarkable characteristics as good interchangeability, high test precision, good stability, long calibration cycle,

small volume, low power consumption and temperature compensation. The sensor can be classified as the

following models according to the measuring range.

Model Measuring Range PCH 100ppm -25.00%

PCL 10.00-99.99%

1.3 Application Range

CY688 series oxygen analyzers are suitable for measuring the oxygen concentration in nitrogen and oxygen

mixture gas or the air. And they can be used in several industries widely. For example, in air separation plant; in

medical and health industry (such as in high pressure oxygen warehouses, baby incubators, life-support machines,

anaesthesia machines); in chemistry and smelting industries (such as in the protection gas of semiconductors and

in the gas sent into high temperature smelting furnaces). And it can also be used to measure the oxygen

concentration in the process of raising creatures and plants, processing and storing vegetables and food; Besides,

the oxygen analyzer may be used to measure the oxygen concentration of the air in such places as home, naval

vessels, underground control centers, tunnels, deep wells, civil air defense projects, city galleries.

2. Technical Specifications

Monitor: A four-digit dynamic numerical LED monitor

Visible display window: 72mm×25mm.

Page 1 www.ci-ele.com


Measuring Range

According to different measuring ranges, the instrument model, corresponding sensor model and measuring range

are listed in the following table.

Model Sensor Model Measuring Range

688F PCH 100ppm –25.00%

688L PCL 10.00-99.99%

NOTE: The above oxygen analyzers of different models have different measuring ranges; when the oxygen

concentration is bigger than or is equal to 1%, the display resolution is 0.01%. When the display value is beyond

the measuring range of the oxygen analyzer, the degree of accuracy of measuring oxygen concentration won’t get

guaranteed.

The Service Life of Oxygen Sensors

The normal service life is 20000 hours

Sampling Air

The airflow loop between the gas to be measured and the oxygen sensor should be shortened as far as possible in

order to measure accurately; the conduit of the sampling air should not have any leakage. In order to reduce the

influence of any reverse diffusion, the vent hole of the oxygen sensor should be equipped with a vent pipe of at

least 300mm. The gas flow velocity is controlled between 100 ml/min and 300 ml/min; the temperature range of the

sampling gas is from -5 ℃ to +50 ℃ and there’s no dew; (the sensor may be customized to use in the

temperature range of -10℃—+300℃.) The pressure of the sampling gas is from 86kPa to 106kPa.

Analog Output

The instrument has an analog output port 4-20mA. The corresponding output range may be set arbitrarily in the

measuring range of the oxygen sensor

Alarm Output

The instrument has one programmable alarm points, and its alarm points and alarm mode may be set arbitrarily in

the measuring range. The fixed lag value of the alarm points is ±2%, and the instrument has a separate alarm light.

The contact power capacity of the switches is AC 125V 0.3A, DC 110V 0.3A, and DC 30V 1A.

Data Interface (Optional part): a RS232 data communication port.



Power Supply

85V-265V.AC, 50/60Hz, the power loss is smaller than 10VA.

Dimensions: shown in figure 1 and figure 2.

Alarm2

SS-0128

MENU

Alarm1

General Co.,Ltd

ppm

CYC

％

P1001 APTITUDE ANALYZERGeneral

20.62

Fig. 1 Oxygen analyzer Dimension

Fig. 2 View and sizes of the sensor

3. Installing the Analyzer

3.1 Open the package and check with eyes

Please open the package correctly, and long-piece cutters are prohibited when opening the package so as not to

damage the instrument. Check the instrument and make sure that the appearance of the instrument is in good

condition, the oxygen sensor hasn’t been deformed, and that the connection lead is perfect. Then go into the next

installation step.

3.2 Instrument Installation

The instrument should be installed in the place where the ambient temperature is between 0℃ and 50 ℃, the

environment humidity is smaller than the 80%RH, and the oxygen analyzer won’t receive strong electromagnetic



disturbance, strong vibration, and collision. After the installation place of the dial plate have been determined, at

first open a 92mm×92mm foursquare installation hole on the dial plate in advance. Then take down the installation

supports of the instrument and slip the instrument from the front into the installation hole. Install the supports of the

instrument again; at last fasten the installment bolts on the supports. Concrete installation dimensions are shown in

figure 3.

Fig. 3 Installation sketch map of the instrument

and the sizes of the dial plate hole

3.3 Connection Ports

The junction hole of the instrument and sensor, the analog output port 4-20mA, the data communication port,

on alarming switches, and the power supply all lie in the back of the instrument; each connecting wire must be

linked according to the nameplate on the back of the instrument. Various ports and port names are listed in the

following table:

Port Port Name Port Port Name 1 4-20mA anode 9 2 4-20mA cathode 10 BLUE (connecting blue wire) 3 RS232 GND 11 BROWN (connecting brown wire) 4 RS232 TX 12 RED (connecting red wire) 5 RS232RX 13 WHITE (connecting white wire) 6 85-265V.AC power supply L 14 Alarm public contact COM 7 85-265V.ACpower supply N 15 Alarm constant closed contact CN 8 FG 16 Alarm constant open contact ON

The oxygen sensor and the instrument are connected by a 4-core cable. One end of the cable is connected to

SENSOR mark on the back of the instrument; the other end is connected with the oxygen sensor in the analzyer.

Note that the direction of the locating slot in the socket must be in accordance with that of the locating raised



platform; otherwise the instrument will be damaged. The standard length of the connection cable is 30cm, and the

cable within 10 meters may be customized according to users’ need. It should be paid attention to that the cable

length has been determined by debugging the oxygen sensor before leaving factory. So the length can’t be

changed arbitrarily, otherwise measuring errors will come into being. In order to reduce the interference of

electronic noises, the electric cable should be far away from such disturbance sources as electric cables with big

electric current, high power relays, and electric motors. You’d better screen the electric cable. The connection ports

on the back of the instrument are shown in figure 4.

Fig.4 The back view of the instrument

3.4 Sensor Installation

The oxygen sensor should be mounted in the place where the ambient temperature is between 0℃ and 50 ℃, the

environment humidity is less than the 80%RH, and the oxygen sensor won’t receive strong electromagnetic

disturbance, strong vibration, and collision. The oxygen sensor is a solid cylinder on whose foundation there are

three installation holes.

3.5 The Connection of Sampling Gas Paths

The sampling gas sent to the oxygen sensor must be clean and not corrosive. The sample gas with impurity and

corrosive substances can be sent to the oxygen sensor only after having been processed with a filter or chemical

absorbent. The oxygen sensor can’t work in the atmosphere with increasing or reducing gas pressure, and it



should work in stable air pressure from 86kpa to 106kpa, otherwise measuring errors will come into being. The

pipeline connection must be extremely good when low concentration oxygen is measured. The part between the

conduit of ppm measuring components and the air intake of the oxygen sensor must be metal tubing or rigid plastic

tubing. If the flowmeter and air bleed pump are mounted in the air intake of the oxygen sensor, they must be

suitable for processing ppm concentration. The airstream loop between the gas to be measured and the oxygen

sensor should be shortened as far as possible in order to measure accurately and reduce lag time. The gas flow

velocity should be controlled between 100 ml/min and 300ml/min. If the gas path is too long, which results from the

limitation of scene installation conditions, a three-way valve and an exhaust pipe whose length must be more than

300mm may be installed near the air inlet of the oxygen sensor for increasing the gas flow velocity and gas

replacement speed of the gas path. It’s very important to install an exhaust pipe of at least 300mm at the

connection part of the oxygen sensor’s air outlet for preventing the air from reverse pervasion. Because reverse

pervasion may occur even if the sampling gas flows outwards, which results from the difference of oxygen partial

pressure between the sampling gas and the air. All the connecting pipes should use the standard metal pipe whose

diameter is 6mm as far as possible, and the transition tie-in is of sealing rigid connection. Gas paths are connected

according to figure 5, and the connection of the gas paths is finished after all the gas paths have been checked and

been assured that there’s no air leakage.

Fig.

FIG.6 Sampling gas path connection sketch map



4. Debugging

4.1 Turn on the Instrument

When all the parts of the analyzer have been linked, the power may be turned on. After the power has been turned

on, the instrument self-checks the monitor at first, and all the digital tubes and LBD are lightened, twinkling. The

monitor will display the model of the analyzer for 8 seconds, and then the sensor begins to be preheated; when

d288 is counted down to d001, the oxygen concentration of the sampling gas that is supplied to the oxygen sensor

will be read. The analyzer has been calibrated before transportation and can be used at any moment. Concrete

display contents are shown in figure 6.

Fig.8 The model of the analyzer、preheat in manner of cutting down, oxygen concentration display process

4.2 Program Design

4.2.1 Set Alarm Points

When the analyzer is in standard measuring mode, press the “MENU” key for 4 seconds and the analyzer enters

the menu mode. And clicking the up key or the down key can choose the menu options. The menu options are AL

(set alarm value), E (set alarm mode), UP (output upper value, LO (set output lower value), CAL (calibration), and



go—(return to the measuring mode).

When AL is chosen, press the “MENU” key for one second and the analyzer enters the setting mode of alarm value.

Clicking the “CYC” key (to shift digit) may change the twinkling digit of current unit or value, and Clicking the up key

or down key may change the unit or value of current twinkling digit. After the value and unit have been adjusted,

press the “MENU” key for one second, current value and unit are stored, and the analyzer returns to the menu

mode.The program design process of alarm points is shown in figure 7.

Fig. 7 Program design of alarm points

4.2.2 Set Alarm Mode

In the menu mode, clicking the up key or the down key can choose the menu options. When E is chosen (set alarm

mode), press the “menu” key for one second and the analyzer enters the setting mode of alarm pattern. Clicking



the up key, or the down key, or the “CYC” key can change current alarm mode. O represents no alarm, H

represents high alarm and L represents low alarm. After the alarm mode has been adjusted, press the “MENU” key

for one second and current alarm pattern is stored; the analyzer returns to the menu mode automatically. The

program design process of alarm mode is shown in figure 8.

Fig. 8 Program design of alarm mode

4.2.3Return to Standard Measuring Mode

In the menu mode, clicking the up key or the down key can choose the menu options. When the “go—” menu is

chosen, click the “MENU” key, the analyzer exits the menu mode and returns to standard measuring mode. The

program operating process is shown in figure 9.



Fig.9 Return to standard measuring mode

4.2.4 Set Output Value

When the analyzer is in the menu mode, clicking the up key or the down key may choose the UP menu (set output

upper value). Press the “MENU” key for one second, and the analyzer enters the mode of setting output upper limit.

Click the “CYC” key (to shift digit) to change the twinkling digit of current unit or value; clicking the up key or the

down key may change the unit or value of current twinkling digit. After the value and unit have been adjusted, press

the “menu” key for one second, current value and unit are stored, and the analyzer returns to the menu mode. The

setting output value is in the range of 0.00-99.99%. The same method is used to adjust the unit or value of LO

(output lower value). Note that the value of UP cannot be smaller than that of LO; otherwise the output will be

deviant and the unit of the measured value in standard measuring mode will twinkle. Set the output value, for

example, set the value of UP as 95.00% and the value of LO as 20.00%. When the oxygen concentration is smaller

than or equal to 20.00%, the corresponding output of 4-20mA is 4mA. When the oxygen concentration is bigger

than or equal to 95.00%, the corresponding output of 4-20mA is 20mA. When the oxygen concentration is between

the upper limit value and the lower limit value, the output is linear with the input correspondingly. The program

design process of the output range is shown in figure 10.



Fig.10 Set Output range

4.2.5 Calibration

When the analyzer is in the menu mode, clicking the up key or the down key can choose the menu options. When

CAL is chosen, press the “MENU” key for one second, and the analyzer enters the calibration mode. The analyzer

will display “PASS” for 4 seconds, reminding the user to input the password. In this mode, the calibration right

password should be input at first and only if the password is right, can calibration begin, otherwise the analyzer will

return to the menu mode until the password is right. The fixed password of the analyzer is 0918. The input method

of the password is as the following: click “CYC” to change the twinkling digit of current numerical value; clicking the

up key or the down key may change the value of current twinkling digit. When the value has been adjusted as 0918,

press the “MENU” key for one second, and the analyzer enters the calibration state.

Each oxygen sensor is provided with a unique corresponding Pre-Amp processing circuit board for convenient use

and maintenance. The Pre-Amp processing circuit boards of any two oxygen sensors can’t be exchanged

arbitrarily; otherwise the oxygen sensors will be damaged.

Production serial number and the characteristic values of the oxygen sensor are shown on the nameplate of the

Pre-Amp processing circuit board. After the analyzer enters the calibration state, standard gas is sent into the



sensor for about 30 minutes until the sensor is completely stable, and then calibration begins. Click the “CYC” key

(to shift digit) to change the twinkling digit of current unit or value; clicking the up key or the down key may change

the unit or value of current twinkling digit. Input the concentration of standard gas into the analyzer. Press the

“menu” key for 2 seconds, and the analyzer will display the sensor’s output current value for 6 seconds. The unit of

electric current is μA, current value is stored and the analyzer returns to the menu mode. New analyzers have

been calibrated correctly before transportation; you’d better not modify it. When the sensor of the analyzer needs

to be replaced, the analyzer can work normally after being calibrated again. The calibration process of oxygen

sensors is shown in figure 12.

Fig.11 Calibration program design of the analyzer

5. Setting Alarm Value

The analyzer has two programmable alarm points, namely AL1（X）and AL2（X）. When the measured value is

bigger than the alarm value, the corresponding alarm indicator lights Alarm1 and Alarm2 will twinkle; the buzzer will

sound, and the corresponding relay will respond. The analyzer has two ways of prompt for errors. The unit

indicator light will twinkle when the setting of the output range of the analyzer is wrong (namely the value of UP is



smaller than that of LO). The output range should be reset; otherwise the output value of the analyzer won’t work

normally. The number displayed on the analyzer will twinkle when the oxygen concentration of the gas to be

measured is bigger than the sensor’ measuring range. You should make sure that the oxygen concentration of the

gas to be measured is the middle value of the measuring range of the oxygen sensor when buying sensors.

Prompt for monitor alarm is shown in figure 14.

FiFig.12 Prompt for monitor alarm

6. Spare Parts and Maintenance

In the whole set of the oxygen analyzer, only the oxygen sensor and its corresponding Pre-Amp processing circuit

board can be replaced, and the design life of all the other parts is 100,000 hours. The instrument should be sent

back to GENERAL Company or the local office for service if there’s something wrong with the instrument. If you

have some questions when ordering the oxygen sensor, please give the serial number and model number of the

product. And the above parameters have been given on the nameplate that lies on the right part of the instrument.

7. Transportation and Storage

7.1 Transportation

The oxygen analyzer that has been well packed may be transported by such vehicles as automobile, airplane,

steamboat and train. And the oxygen analyzer should be protected from rain and snow during transportation. Care

should be taken to put it down carefully and lightly, and avoid heavy pressure when conveying the oxygen analyzer.

7.2 Storage

Products that have been well packed should be preserved in the storehouse where the temperature is -5～40℃,

relative humidity is not bigger than 95%RH at 25℃, and there is no corrosive substances such as acidic matter

and alkaline matter.



8. A complete set of the instrument

1. An analyzer

2. An oxygen sensor

3. A connection cable


Shanghai ChangAi Electronic Science & Technology Co., Ltd

Add: 17J, 1138 ChangAn Road, Zhabei, Shanghai, P.R. China 200070

Tel：021-51068326

Fax：021-51068327

Web：www.ci-ele.com

Email：[email protected]

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anexo cy688 series oxygen analyzer instruction manual

Documents

gas flow velocity

programmable alarm points

program design process

standard measuring mode

oxygen mixture gas

current twinkling digit

sampling gas paths

set alarm mode