Readjustment - thyracont VSP63D Betriebsanleitung

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Setting E: Relay closes in case of a device error.
Setting !E: Relay opens in case of a device error.
Setting U: Relay closes in case of pressure underrange.
Setting !U: Relay opens in case of pressure underrange.
Setting T0: Open relay by software command (off).
Setting T1: Close relay by software command (on).
The control LEDs on top of the transducer will be on as soon as
the related relay is closed.

5.7 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 conditions, extreme tempera-
ture changes, ageing or contamination can result in the need for readjustment of
the Pirani 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
-4
range 1.0x10 ... 1.0x10
with the pressure value p as reference pressure. This can be beneficial, if a suita-
bly low pressure for zero adjustment cannot be applied.
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
-5
mbar.
-1
mbar. Command AL then has to be transmitted together