User Manual
TRAQC-8 DPC
TRAQC-8 DPC 11/2016 EN Rev.3
Sheet 14
3.2.2
Precautions before bring on pressure to test connections
Failure to comply to the measuring range will destroy the measuring element. Ensuring pressures are within
specified ranges is the responsibility of the operator.
At the attachment you will find the pneumatic schematics of this instrument and the manual of the Heise
volume controller.
Please read the pneumatic schematics of this instrument carefully before operating this instrument!
Wrong operating of this instrument will cause serious damage of the differential pressure sensor!
The valves T1700 have a soft seat and a tight shut-off. It is not necessary to close them with
excess force. See §7.1.4 for instructions.
3.2.3
Bring on pressure to test connections
If all preparations as noticed at 3.2.1 have been carried out, the test procedure can be start:
If available, connect the power connection of the calibrator to an external power supply
If available, connect the refilling connection of the calibrator to an external pressure
supply, maximum 200 bar
Push the power button to turn on the calibrator
Connect the test connections of the calibrator to the instrument to be tested
Turn the Bottle shut off valve counter clockwise or open the external pressure supply to
bring on pressure to the system
Turn the Pressure control valve clock wise, till the test pressure is reached at
Manometer 1
Now close the Supply valve fully clockwise to ensure no pressure will leak out of the test
circuit
During the test, the Supply valve must be closed!
If during the test the Supply valve will be opened, probably the pressure sensor will be damaged
so it has to be replaced
!
The Balance valve of the Heise volume controller must be set into Test mode (push)
Turn the Mode selector valve to ‘Measure’
During the test, the Mode selector valve must stay in the ‘Measure’-position!
If during the test the Mode selector valve will be set into Equalize-position, then the pressure
sensor possibly will be damaged so it has to be replaced!
Now a differential pressure between Test + connection and Test – connection can be set.
Therefore, turn the Heise volume controller clock wise to bring on positive differential
pressure. The differential pressure can be read at the display
The range of the differential pressure sensor is from 0 to 1000 mbar above line pressure.
To fine tune the differential pressure you must use the Heise volume controller
Do not use the Relief valve to release pressure during a test. When you do, probably the
differential pressure will lower too fast and too low, which may cause such a low pressure that the
pressure sensor will be damaged so it has to be replaced!
Let stabilize the test pressure before taking measurement point
