HENAN HANWEI ELECTRONICS CO., LTD WD6200 User manual

HENAN HANWEI ELECTRONICS CO., LTD
WD6200
Fixed gas detector
Operation manual
Read this manual carefully before using the device
Ver：HWWM161229CG

SAFETY INFORMATION
Before using this product, please read the following safety instruction
carefully and comply with related operation regulation strictly.
Please don't use defective detector. Before using, please check if there is
crack or spare part missing. If yes, please contact to the seller.
WD6200 detector had been calibrated in manufacturer’s factory,
however, it is still suggested to calibrate it at your working spot before
using it.
In order to assure the user’s safety and assure the detector work
normally, the users are suggested to do impact test on the detector with
high concentration level-known gas (put the detector into the target gas
whose concentration is higher than the high alarm level) If the displayed
value is exceeding the correct range, please calibrate the detector.
Please don't expose the device to the gas whose concentration is
exceeding the range. Otherwise, it will influence the accuracy and
shorten the sensor life.
Please cut off power supply before open the detector. Please don’t open
the detector or replace the sensor in the places where danger gas
possibly exists.
Installation must abide by the national and local regulations.
The detector must be earthed, so as to avoid RF interference.
Please don’t paint the detector.
Please use the specified spare parts during maintenance and repairing.
Please don’t put the gas sensor into organic solvent or flammable
solution.
Please don’t expose the detector to high concentration gas which is
exceeding the detection range. Otherwise, it will shorten the sensor life.
Please don't expose the device to electric shock, strong magnetic field or
serious continuous mechanic shocking.

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Table of content
1. BRIEF INTRODUCTION.................................................................................. 2
2. TECHNICAL SPECIFICATION .......................................................................... 2
3. STRUCTURE.................................................................................................. 4
4. INSTALLATION.............................................................................................. 5
4.1 INSTALLATION POSITION .....................................................................................5
4.2 INSTALLATION DIMENSION..................................................................................5
4.3 INSTALLATION METHOD......................................................................................6
5. WIRE CONNECTION...................................................................................... 9
6.POWER ON.................................................................................................. 12
7.MENU OPERATION ...................................................................................... 13
7.1 REMOTE CONTROLLER .....................................................................................13
7.2LOW ALARM SETTING.......................................................................................15
7.2 HIGH ALARM SETTING .....................................................................................15
7.3 ZERO TRANSLATION.........................................................................................15
8.CALIBRATION .............................................................................................. 16
9. SENSOR REPLACEMENT.............................................................................. 17
10. TROUBLE SHOOTING GUIDANCE............................................................... 19

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1. Brief introduction
WD6200 adopt high quality gas sensor and MCU technology, has good
repeatability and stability. It is widely used in the fields of oil processing
plants, chemical factories, metallurgy, power plants etc. With 4-20mA signal
output, it can be connected with the control panel of KB2160.
Main features:
High sensitivity, stable performance, long life span;
4-20mA signal output;
Relay output of low alarm, high alarm and fault alert;
High quality LCD screen can work in -40℃environment.
Setting through remote controller, easy for operation;
Specific installation rack, easy for the installation;
Sensor module design, easy for maintenance and replacement;
Indication functions of re-calibration remind and sensor overdue.
2. Technical specification
Sensor type: Catalytic or electrochemical or infrared
Gas sampling: Natural diffusion
Working voltage: DC 24V±6V Consumption: ≤5W
Accuracy: ≤±5%F.S
Status indication: Yellow LED: Fault Red LED: gas leak alarm
Response time (t90): ≤30s (LEL)/ ≤60s (Toxic gas / O2)
Temperature: -40℃～70℃(LEL) / -20℃～50℃(toxic gas / O2)
Humidity: ≤95%RH
Explosion-proof: ExdⅡCT6Gb
Ingress protection: IP65
Environment pressure: 86kPa～106kPa
Signal output: 4-20mA output Relay output

3
Screw thread: G3/4
Cable requirement: 3-line, ≥1.5 mm2,
Cable outer diameter between 6mm and 12mm
Distance to the panel: ≤1000m
Sensor life:
Catalytic 3 years; Electrochemical: 2 years; Infrared: ≥ 5 years
Dimensions and weight: 293 mm×263mm×108mm
Weight: about 2.7kg
Target gas
Detection range
Resolution
Standard gas flow
CH4
0～100%LEL
0～5%VOL
0～100%VOL
1%LEL
0.1%VOL
500ml/min
C3H8
0～100%LEL
1%LEL
500ml/min
H2
0～100%LEL
1%LEL
500ml/min
C4H10
0～100%LEL
1%LEL
500ml/min
CO
0～1000ppm
1ppm
200±50ml/min
H2S
0～100ppm
1ppm
200±50ml/min
O2
0～30%VOL
0.1%VOL
300±50ml/min
NH3
0～100ppm
1ppm
400±50ml/min
SO2
0～500ppm
1ppm
600ml/min
NO2
0～20ppm
1ppm
1000±50ml/min

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3. Structure
NO.
Name
NO.
Name
1
Top thread
9
Front cover
2
Earth nut
10
Installation rack
3
Thread connector
11
Top thread
4
adaptor
12
Sensor assembly
5
Cable protector
13
Name plate
6
ALARM indicator
14
chains
7
Remote control receiver
15
LCD screen
8
FAULT indicator
WD6200 Structure schematic drawing

5
4. Installation
4.1 Installation position
1) For petrol gas, oil gas and alcohol gas etc. which is heavier than the air,
the position is 0.3m-0.6m higher than the ground.
2) For natural gas, CH4 etc which is lighter than the air, the position is
0.5m-2m higher than the gas source.
Note: Gas density more than 0.97kg/CBM, then it's heavier.
3) Gas density less than 0.97kg/CBM, then it's lighter.
4) Choosing suitable position should first consider the air flow speed and
direction, relative position to the potential leakage source and air
ventilation. The installation be convenient for maintenance and
calibration.
5) The position should be far away from shocking, shattering, strong
electromagnetic interference. Around the position, there should be at
least 0.5m empty place.
6) There should not be fast air blow. Otherwise, it will influence the testing
result.
4.2Installation dimension
Installation rack

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4.3 Installation method
When installing the detector, the sensor head should be downwards, so as to
avoid dust or rain falls onto the sensor and assure the target gas can be better
detected
According to the working place situation, the user can choose a suitable
method of the following 3 methods.
Wall mounted type installation
1). Drill suitable screw holes on the wall according to the installation rack.
2). As shown in the below picture, assemble the installation rack and tighten
them by the M5 screws. Please remember to add the light spring washer onto
the screws.
Unit: MM
WD6200 Dimension

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3) Fix the installation rack assembly tightly on the wall through M6
expansion bolts.
4) Hang the detector onto the rack. Please make sure the hanging is firm and
steady. Then fix both the detector and the rack by using 2pcs of M5 screws.
1 fixed mount
2 Installation rack
3 light washer
4 screws
1 WD6200 detector
2 hanging accessories
3 fixing mount
4 installation rack
5 M5 screws（2pcs）
6 wall

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Horizontal / vertical pipe installation:
On the installation spot, if there is horizontal or vertical pipe whose diameter
is not more than 75mm, the user can first assemble the installation rack set,
then fix rack set on the pipe. Details as shown on the following picture:
Hang the detector onto the rack. Please make sure the hanging is firm and
steady. Then fix both the detector and the rack by using 2pcs of M5 screws

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5. Wire connection
Warning:
Before connecting the wires, please cut off the power supply.
Please make sure the detector is earthed.
Steps of wire connection:
1. Screw off the front cover and take out the PCB by pulling the pull-tab.
1 Front cover
2 PCB
3 pull tab

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2. Take out the rotary union, washer and rubber sealing plug, and then pass
the wire through the rotary union, washer and rubber sealing plug as
shown on the below picture.
3. All the wires should be connected to the terminals inside the detector.
Below is the terminal drawing and instruction.
1 Washer
2 rubber sealing plug
3 rotary union
4 cable protector

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If L-alarm relay output is configured to active voltage output, then there is
changes on the terminals as follows:
NO.
Mark
Function
12
COM
Cathode of
voltage output
13
NC
Voltage Anode
NC output
14
NO
Voltage Anode
NO output
4. After all the wire connection is ok, please pull out the useless wire and
then screw on the rotary union, tighten the rubber sealing plug and the
wire.
Note: The outer diameter of the wire between the control panel and
detector should not be less than 6mm.
5. Install PCB, screw on the front cover.
Note: According to the spot situation, the user can first install the
NO.
mark
function
NO
.
mark
function
1
NC
Fault relay NC
8
To earth
2
NO
Fault relay NO
9
Iout
4-20mA output
3
CO
M
Fault relay COM
10
24-
power
4
NC
High alarm relay
NC
11
+24
power
5
NO
High alarm NO
12
COM
low alarm relay
COM
6
CO
M
High alarm COM
13
NC
Low alarm relay NC
7
14
NO
Low alarm relay NO

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detector and then connect the wire; or first connect the wire and then
install the detector.
6.Power on
Note：The working voltage of the detector is DC 24V±6V. Voltage over
30V may damage the detector irremediably.
Power on
1) Connect the detector with the power source.
The screen displays all the icons. Then in turns it will display the
software version number (such as V1.01) and the sensor module
software version number (“○
S” icon on the top right corner ).
2) Detector starts warm up, wait until the warm up is completed. (the time
depends on the sensor type).
3) After warm up, the screen displays the gas level and detector status and
sends relative signals to the control panel. Detailed display is shown
like the below picture.

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4) Different working status as different display shown in below table.
Status
LED
LCD
Relay
Normal
Off
Gas
level
—
L-alarm
Red alarm LED
flickers twice per
second
Gas
level
L-alarm relay
closed
H-alarm
Red alarm LED
flickers 5 times per
second
Gas
level
H-alarm and
L-alarm relays
closed
Calibration data
wrong
Yellow fault LED on
E-01
Fault relay closed
Sensor fault①
Yellow fault LED on
E-02
Fault relay closed
Communications
fault
Yellow fault LED on
E-03
Fault relay closed
Sensor not
calibrated
Yellow fault LED on
E-05
—
High
concentration
protection②
—
FULL
All the relays
closed
Note: ①/②: These 2 functions only available for combustible type.
7.Menu operation
7.1 Remote controller
1) All the settings and calibration are operated through the remote
controller IR03.
2) The remote controller must be operated within 1 meter near the detector

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and the operation angel is±15°(based on the middle line of the screen.)
3) If not used for long time, please take out the batteries.
4) Below is the picture of the remote controller IR03
5) In power off situation, press for 1~2s to open the remote controller,
and then again press for 1~2s will close the remote controller. If
there is no any button been pressed down in 6 minutes, the remote
controller will power off automatically.
6) If you press both the button and , the remote controller will
change between IR03 mode and IR05 mode, WD6200 detector require
to be operated within IR03 mode.
There are totally 4 menu options which can be shown on WD6200 screen.
The below table will give you a detailed explanation.
Menu
Function
Description
F--1
L-alarm setting
Set the low alarm level
F--2
H-alarm setting
Set the high alarm level
F--3
Zero translation
Translate zero point
F--4
Calibration
Calibration

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7.2Low alarm setting
1) In normal status, press “ ” once and it will display [F--1]. Then
press “ ”, it will display the pre-set low alarm level.
2) You can change this figure by pressing “ ” or “ ”.
3) After setting completed, press “ ” to save the setting. If the screen
display “OK”, then the setting will be effective.
4) After above operation, press “ ” to continue the other settings. Or,
press “ ” to return to the normal working status.
7.2 High alarm setting
1) In normal status, press “ ” twice and it will display [F--2]. Then
press “ ”, it will display the pre-set high alarm level.
2) You can change this figure by pressing “ ” or “ ”.
3) After setting completed, press “ ” to save the change. If the screen
display “OK”, then the setting will be effective.
4) After the above operation, press “ ” to continue the other settings. Or,
press “ ” to return to the normal working status.
7.3 Zero translation
After the detector have been used for some time, if you reinstall it and put it
in a new environment, it may not display “0”in clean air, this is called zero
drift. Zero drift usually happens due to great change of temperature and
humidity of the detecting environment, it can be corrected by zero
translation.
1) Make sure the detector is put in clean air environment, after the detector
works over 10 minutes, operate with remote controller and press the
button for three times, the detector will display [F--3], then press
the button , the screen will show indication “OK？”, then press

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to execute zero translation.
2) During zero translation, the screen will show the current A/D value.
How long does it take depend on the sensor type and how much the
sensor drifted. For small drift, zero translation can be done immediately.
3) After zero translation is done, the detector will go back to show [F--3],
you can press to continue other setup or press to go back to
normal working situation.
Note: Zero translation cannot correct the sensitivity deviation which caused
due to long time use, it is normally used when zero calibration is
inconvenient to proceed. Even though you have done zero translation, it is
highly suggested to do calibration once every 180 days.
8.Calibration
WD6200 has calibration remind function, if less than 30 days left for next
calibration, the detector will display flashing“○S”in normal working status,
press can check how many days left for next calibration, if it shows
“D020”, it means 20 days left for next calibration. Please calibrate the
detector within 20 days.
Calibration steps:
1) After the detector works over 10 minutes, press the button for four
times, the screen will show [F--4], then press the button .
2) On the screen it shows default calibration concentration, press the
button or to change the figure to be same with the
concentration of your calibration gas, then press the button .
3) Input the calibration gas, keep the input gas flow steady and
continuously, and it should last for 2～3 minutes.
4) The screen shows the current A/D value, and the figure is changing,
after the figure is steady, press to confirm the value, the detector
will remember the current A/D value and calibration will be effective

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immediately.
5) After calibration is done, the screen display [F--4], you can press
to continue other setup or press to go back to normal working
status.
Note: It is suggested to do Zero calibration first, and then do Span
calibration. And you can calibrate more than one point.
9. Sensor replacement
In normal working status, if the mark of “○
S”display on the screen(not
flashing), it means the sensor is about to lose effect, please replace the sensor
on time. Press button for twice, you can see how many days left for
sensor overdue. For example,“E020”means the sensor will lose effect after
20 days.
To replace the sensor, open the cover of the main body is not necessary, only