Thyracont VCC200MA4, Operating Instructions Manual

Page: 27 / 36

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4.2 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.
To achieve optimum results of the adjustment we recommend to
consider a warm-up of at least 15 minutes at the appropriate cali-
bration pressure before any adjustment.
Readjustment at Zero or Atmosphere Pressure
Digital readjustment at zero or atmosphere pressure can be done by means of the
»Adj« pushbutton. The transducer will notice automatically which adjustment point
is relevant.
For zero adjustment actual pressure should be less than
5,0x10
-5
mbar, alternatively the unit can be adjusted on a variable
zero reference pressure (see below).
For adjustment first remove the rubber cap above the »Adj« button (1), then press
the pushbutton by means of a screwdriver or other suitable tool (2). When suc-
cessfully adjusted the transducer’s output signal will correspond to the value for
1000 mbar or respectively measurement under range »ur« . Finally insert the rub-
ber cap again.
VSP/VCP-0-10 V-201126