Maintenance, Repair
GA09420_002_C0 – (2016-10) –
Leybold
39
6.2.2 Zero Point Adjustment
A zero point adjustment is recommended
• after the sensor has been exchanged
• as part of the usual maintenance work for quality assurance
• if "FAIL 5" is shown on the display
Required tools
• Pin approx. ø1.3 × 50 mm (e.g. a bent open paper clip)
Procedure
The push button <FULL SCALE> is also used for the zero point adjustment
(→ Illustration in "Adjustment at Atmospheric Pressure").
Operate transmitter for approx. 10 minutes at a pressure of 1×10
-4
mbar.
Insert the pin through the opening marked <FULL SCALE> and push the
button inside for 2 s.
The adjustment is done automatically and ends after 2 minutes.
The zero point of the transmitter is now adjusted.
6.3 What to Do in Case of Problems
In the event of a fault or a complete failure of the output signal, the transmitter can
easily be checked.
Required tools / material
• Voltmeter / ohmmeter
• Allen key, size 2.5 mm
• Spare sensor (if the sensor is faulty)
Troubleshooting
The output signal is available at the sensor cable connector (Pin 2 and Pin 12).
In case of an error, it may be helpful to just turn off the mains supply and
turn it on again after 5 s.
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