Inficon PCG550 - Troubleshooting Gauge and Sensor Errors

tina56e1-f (2015-09) 59
If the pressure value 4.99×10
-5
mbar is output at the
measurement value output or on the LCD display, the
adjustment has been successful. Otherwise, repeat the
adjustment procedure.
6.2 Adjusting the Atmospheric Pressure Sensor
The ambient pressure of the gauge is measured by a separate
atmospheric pressure sensor built into the electronics unit of the
gauge.
The atmospheric pressure sensor can be calibrated against the
diaphragm capacitive sensor in the gauge. The gauge
electronics compares the output signals of the two sensors and
carries out the necessary adjustments to the atmospheric
pressure sensor signal.
The adjustment of the atmospheric pressure sensor can
only be carried out via
• the diagnostic port (→  [3])
• the DeviceNet, Profibus, EtherCAT and RS485
interface (→  [3], [4], [5], [6]).
6.3 Troubleshooting
In the event of a fault or a complete failure of the output signal,
the gauge can easily be checked.
Required tools / material
• Voltmeter / ohmmeter
• Allen wrench, AF 2
• Spare sensor (if the sensor is faulty)