Readjustment Of The Vacuum Gauge - vacuubrand DVR 2 Mode D'emploi

Readjustment of the vaccum gauge
The equipment has been adjusted at the factory. In general, there is no need for adjustment by the user
because of the excellent longtime stability.
Depending on operation conditions, type of application and accuracy requirements, an inspection and
readjustment may become necessary.
Adjustment at atmospheric pressure
Admit air to the vacuum gauge. Make sure that the vacuum connection at the vacuum gauge is at atmospheric
pressure.
Attention: Determine the exact actual atmospheric pressure, e. g. by using an accurate barometer or get
accurate reading from the weather service, e. g. at the next airport, etc. (take into account the difference in
altitude between e. g. airport and laboratory).
+
Adjustment under vacuum
Evacuate the vacuum gauge to a pressure <0.5 mbar (<0.4 Torr) e. g. by applying a good rotary vane pump.
+
Attention: Adjustment under vacuum with a pressure higher than 0.5 mbar (0.4 Torr) reduces the accuracy
of measurement. If the pressure is significantly higher than 0.5 mbar (0.4 Torr), adjustment to a reference
pressure is recommended.
➨ Press key UP/DOWN simultaneously with key
ON/OFF.
☞ The vacuum gauge switches to the adjustment
mode (indicated by a warning triangle).
☞ The arrow in the right direction indicates that
the pressure value can be increased by using
key UP/DOWN.
➨ Press key UP/DOWN to increase the reading
to actual atmospheric pressure.
To reduce the reading:
➨ Press key MODE to change arrow direction to
the left.
➨ Then press key UP/DOWN to reduce the read-
ing.
➨ Press key ON/OFF to confirm adjustment and
to terminate mode.
➨ Press key UP/DOWN simultaneously with key
ON/OFF.
☞ The vacuum gauge switches to the adjustment
mode (indicated by a warning triangle)
☞ The reading is adjusted automatically to "zero".
➨ Press key ON/OFF to confirm adjustment and
to terminate mode.
12.12.2002