Readjustment - thyracont VSM77D Betriebsanleitung

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4.3

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 Pirani sensor.
Readjustment by pushbutton
Readjustment on atmosphere or zero pressure can be done by means of the
ADJ pushbutton of the VSM (see operating scheme below). The transducer will
notice automatically which adjustment point is relevant.
For adjustment first remove the rubber cap above the ADJ button (1), then press
the pushbutton several times by means of a screwdriver or other suitable tool (2)
until the status LED starts quickly flashing orange. After further 3s a slowly
flashing status LED signalizes that the transducer now can be readjusted by
pushing the button once again. Finally insert the rubber cap again.
VSM-de-171005
Downloaded from www.Manualslib.com
For zero adjustment actual pressure should be less than
-5
5,0x10 mbar.
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.
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