10
300360490_002_C0 - 09/2016 - © Leybold
4.2
Adjustment
The transducer is adjusted ex works in upright position with 24V voltage supply.
Through contamination, ageing or extreme climatic conditions the need for
readjustment may arise.
Readjustment on atmosphere or zero pressure is done digitally by means of the
"up" and "down" buttons. The transducer will notice automatically which
adjustment point is relevant.
To achieve optimum results of the adjustment consider a
warm-up of at least 10 minutes at the appropriate calibration
pressure before any adjustment.
4.2.1 Zero Adjustment
The adjustment at zero pressure is an offset compensation of the measurement
signal.
For zero adjustment real pressure must be less than 0.1 mbar.
An adjustment at zero pressure is only possible, if the DI2000
pressure reading is below 100 mbar.
The output signal at zero pressure should equal 4.000 mA (DI2000 / DI2001) or
2,000 V (DU2000 / DU2001).
For adjustment first remove the rubber caps from both buttons (1), then -by
means of a screw driver or other suitable tool- push button "up" to increase the
output signal or button "down" to decrease the output signal (2). If a button is
permanently pressed the signal will change continuously in the respective
direction.
If no further button is pressed for an interval of 5s, the adjusted value is set.
Now insert the rubber cap again.
