thyracont VSP63MA4 Betriebsanleitung Seite 28

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Adjustment at a User-Defined Zero Reference Pressure
The Pirani sensor can alternatively be adjusted at a user-defined zero reference
pressure below 1,0x10
For this purpose remove both rubber caps above the pushbuttons (1), then press
the »Set« button by means of a screw driver or other suitable tool (2). For 5 s now
a voltage is provided at the signal output which corresponds to the actual zero re-
ference pressure (setting ex works: signal for »ur« pressure underrange).
By means of the »Adj« button this value can be incremented according to the
pressure-voltage relation in section 4.1 up to max. 1.0x10
the voltage will again restart at the signal level for »ur« . When the voltage output
is correctly adjusted to the actual reference pressure, the adjustment procedure is
carried out automatically after 5 s without further keypress. Finally insert the rubber
cap again.
Normal zero adjustment by a single stroke on the »Adj« button as
described in the previous paragraph will from now on adjust the
output signal to the edited zero reference value.
VSP/VCP-4-20 mA-201126
-2
mbar.
-2
mbar (3), whereafter