38
Display unit and orientation can be changed by software command, see section
5.5.
4.3 Readjustment
The transducer is adjusted ex works with 24 V voltage supply in upright position,
flange to the bottom. Other orientation, operation under different climatic conditi-
ons, extreme temperature changes, ageing or contamination can result in the need
for readjustment of the Pirani sensor.
Readjustment by Pushbutton
Digital readjustment at atmosphere or zero pressure can be done by means of the
»Adj« pushbutton, see operation scheme below. The transducer will notice auto-
matically which adjustment point is relevant.
For zero adjustment actual pressure should be less than
5.0x10
-5
mbar.
To achieve optimum results of the adjustment we recommend to
consider a warm-up of at least 10 minutes at the appropriate cali-
bration pressure before any adjustment.
VSP/VCP-RS485-200116
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