118.00
φ
8.00
140.00
φ
8.00
φ
8.00
1
0
2
.3
0
2
0
6
.0
0
89.00
2. Steps of Installation
Connect wire to correspondent terminals. Don't work with power on. The arrangement of terminals
differs according to the type of transmitter. The definition of different wires:
Red: positive-input of power (12 to 24V)/24V+ Black:
ground wire of power/24V
Yellow:4-20mA output.
Orange: RS485A
Blue: RS485B
Brown: Free
Fix the detector on the wall with expansion bolt, make sure the transmitter is downward, or the detector
cannot work property. Users can also separate the bracket and transmitter according to the condition on
spot, fix the bracket before connection.
For the sake of safety and interference reduction, please connect the housing with reliable ground wire.
For the wire between the transmitter and the main engine, the shorter, the better. And protect the wire with
iron pipe.
Method of Calibration
To guarantee the measurement accuracy of the transmitter, regular calibration and maintaining
rigorous record is necessary.
Devices needed for calibration: a bottle of sample gas used for range calibration (60%F.S standard gas in
normal site),relief valve, flow meter of 0~1000ml/min, transparent and smooth conduit for gas, standard gas
housing, digital multimeter, stopwatch and etc.
Note: The value of transmitter WB (4mA) , WC (20mA) , Wz (zero potentiometer), WA (range
potentiometer, also known as calibration potentiometer) and host alarm has been set right before it leaves
the factory. User should not adjust casually. It is the value of zero potentiometer (Z) and calibration
potentiometer (S) needed to be set on spot.
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