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20901134_EN_DVR 3pro_V1.4_060420
Operation
6.2.3
6.2.3 Adjustment under vacuum
Adjustment under vacuum
NOTICE
NOTICE
The adjustment at vacuum always occurs to the final
measured value with 0 mbar.
>
Pump down to an ultimate vacuum as low as possible.
>
Check the accuracy of the ultimate vacuum with a calibrated
reference vacuum gauge.
Adjustment under vacuum
1.
Connect the gauge to a vacuum pump which pumps to a pre‑
cise vacuum, e. g., a rotary vane pump down to < 0,5 mbar.
+
2.
Press and hold the
UP/DOWN
UP/DOWN
key at the switched‑off gauge
and then press
ON/OFF
ON/OFF
.
5
Display adjustment mode ‑ only active for approx. 20
seconds.
Display only at vacuum less than < 20 mbar (15 Torr).
3.
Press key
UP/DOWN
UP/DOWN
repeatedly until 0 mbar is displayed.
Changing pointer direction with
MODE key
MODE key
= decrease value /
= increase value
5
Value for vacuum < 0,5 mbar.