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WIKA operating instructions, model GDM-RC-100
EN
14385258.01 04/2020 EN/DE
7. Maintenance, cleaning and recalibration
7.3 Calibration
The gas density monitor can be calibrated via a special calibration system for gas
density measuring instruments (e.g. WIKA BCS-10).
The gas density monitor with test connection and shut-off valve can be isolated from the
gas compartment using the shut-off valve, without the gas density monitor needing to be
dismounted. With gas density monitors that do not offer a test connection and shut-off
valve, the gas density monitor must be dismounted professionally. In this case, it may be
necessary to take the entire system temporarily out of service.
Calibration of the gas density monitor with test connection and shut-off valve
(using the example of model GDM-100-CV)
CAUTION!
Discontinuity in the monitoring function
During calibration, the gas density monitor must be isolated from the gas
compartment being monitored. In the event of a leakage, no alarm will be
able to be given.
▶
After calibration, open the shut-off valve again.
Tightening torque shut-off valve:
1.2 Nm ±10 %
Tightening torque test connection: 60 Nm ±10 %
1.
Pull out the plug for valve setting (1).
2.
Insert the socket wrench insert into the valve setting (2).
3.
Turn the valve setting to the “CLOSE” position (3) with the aid of the socket wrench.
■
Socket wrench insert can no longer be pulled out.
■
Gas density monitor is isolated from the gas compartment.
4. Connect the test gas and test standard with the test connection.
5. Make the calibration.
6. Isolate the test gas and test standard from the test connection.
7.
Turn the valve setting to the “OPEN” position (3) with the aid of the socket wrench.
■
Socket wrench insert can now be pulled out again.
■
Gas density monitor is connected to the gas compartment.
1
2
3
