Thyracont B_VSR53, Инструкция по сборке

Страница: 14 / 16

14
B_VSR-de-141013
3.3 Transducer Adjustment
To achieve maximum precision when operating the transducer with the new
sensor head it will be necessary to adjust the Pirani sensor at atmospheric and
zero pressure. This procedure adapts the electronics to sensor tolerances and
stores the new calibration data in a parameter memory.
After exchanging the sensor reconnect the transducer to the voltage supply.
For the Pirani sensor readjustment at atmosphere or zero 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.
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.
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.