VACUUBRAND PC 3012 NT VARIO Duo - Manual (Page 84)

page 78 of 145
The vacuum gauge was adjusted using factory standards,
which are traceable through regular calibration in an ac-
credited laboratory (DAkkS calibration laboratory) to the
German national pressure standard. Depending on the
process and/or accuracy requirements, check the adjust-
ment and readjust if necessary. For readjustment, the
device has to be adjusted both at atmospheric pressure
as well as under vacuum but only if the reference pres-
sures are known with certainty. The adjustment mode can
be activated only if the process control is inactive. Press
”START/STOP” key, if necessary. In the range between 15
to 525 Torr (20 to 700 mbar) no adjustment is possible;
---- Torr is displayed.
NOTICE
Adjustment at atmospheric pressure
An adjustment at atmospheric pressure is only
possible if the pressure is higher than 525 Torr
(700 mbar).
Vent the measurement connection of the CVC
3000 and/or the vacuum system. Make sure
that the pressure transducer is at atmospheric
pressure.
➨
In ”Configuration” menu, select program ”Adjustment” at the controller.
➨
Use the selection knob to adjust the reading to the current atmospheric
pressure.
➨
Press the selection knob to confirm.
1013 mbar
Note: To determine the actual atmospheric pressure, use an accurate
barometer or get accurate reading from the weather service, or a nearby
airport or other reliable source (taking into account the difference in alti-
tude between the source and the laboratory).
Readjustment of CVC 3000