Automatikprodukter
Ammonia detector - Manual
NH3/ENH3
April.10
Electrochemical Transmitter
4.1
Wiring connection
•
Unscrew cover of enclosure.
•
Unplug basic PCB from terminal blocks.
•
Connect cable leads to terminal block X4.
•
Plug the PCB in the fixed terminal blocks on base.
•
Screw cover on base
5 Commissioning
Consider commisioning instructions at any exchange of sensor elements.
Only trained technicians should perform the following:
•
Check mounting location.
•
Select output signal form: Current or voltage, and starting point 0 o 20%. See fig.4
•
Check supply voltage.
•
Check PCB for proper mounting at X4 and X5.
•
Check for correct sensor element at terminal X3 PCB EC-S.
•
Addressing of the transmitter in the GCD-05_Bus mode..
•
Calibration of the transmitter (if not factory-calibrated).
Note:
Prior to calibration the sensor element must be fully stabilized by applying power voltage for at least 18 hours
without interruption.
Please observe proper handling procedures for test gas bottles according to TRGS 220!
NH
3
calibration gas is toxic, never inhale the gas!
Symptoms at high concentrations: Loss of motility and consciousness.
Procedure if exposed: Get the victim into fresh air at once, consult doctor.
5.1
Calibration
Depending on the version and the control mode there are three different possibilities to calibrate the transmitter:
Manual calibration
Manual calibration is only possible if the transmitter is equipped with the push-button ”Zero” and the potentiometer
”Gain” (= version for manual calibration).
Manual calibration is possible both in analog mode and in DGC-05_Bus mode.
In the GCD-05_Bus mode the jumper V-A has to be set before manual calibration.
Only by doing so the control voltage is available at the test pins X6.
Remove the jumper after calibration
Calibration with the Service Tool DGC-05
In the standard version (equipped with the communication connector X12) the transmitter is delivered for tool and/
or software calibration.
In the analog mode the service tool calibration is only possible with the 3-wire technique of the transmitter!
In the GCD-05_Bus mode calibration is always possible.
