Readjustment - thyracont VSP63D Betriebsanleitung

5.7

Readjustment

The transducer is adjusted ex works with 24V voltage supply in upright position,
flange to the bottom.
Other orientation, operation under different climatic conditions, extreme
temperature changes, ageing or contamination can result in the need for
readjustment of the sensor.
Adjust High AH
Adjustment of the Pirani sensor at atmosphere pressure.
Adjust Low AL
Adjustment of the Pirani sensor at zero pressure. For this purpose actual
pressure must be less than 5,0x10
Adjust Low AL[p]
It is also possible to adjust the Pirani sensor at a certain reference pressure in
the range 1x10 ... 1x10
-4
together with the pressure value [p] as reference pressure.
This can be of advantage, if a suitably low pressure for zero adjustment cannot
be applied.
-5
mbar. Command AL then has to be transmitted
-1
To achieve optimum results of the adjustment we recommend
to consider a warm-up of at least 10 minutes at the appropriate
calibration pressure before any adjustment.
mbar.
47
VSP-de-171005