Calibration In The Factory; Replacement Of The Battery - vacuubrand DVR 2 Mode D'emploi

Adjustment at reference pressure
Evacuate the vacuum gauge to an exact known reference pressure within the range of 0 .... 20 mbar (0 ....
15 Torr). Switch vacuum gauge to the adjustment mode (see "Adjustment under vacuum").
Attention: The accuracy of the value of the reference pressure will directly affect the accuracy of the
adjustment. If the nominal ultimate vacuum of a diaphragm pump is used as "reference" vacuum, the
accuracy of the adjustment of the vacuum gauge might be doubtful. The diaphragm pump may not achieve
the specified value due to condensate, poor state, failure of the valves or the diaphragm.

Calibration in the factory

Control of measuring equipment
The VACUUBRAND DKD calibration laboratory is accredited by the Physikalisch-Technische Bundesanstalt
(PTB; German national institute for science and technology and the highest technical authority of the
Federal Republic of Germany for the field of meteorology and certain sectors of safety engineering) for the
measurable variable pressure in the pressure range from 10
the general criteria for the operation of testing laboratories defined in the standard EN ISO/IEC 17025:2000.
Calibration in the VACUUBRAND calibration laboratory:
- To meet the requirements of the DIN ISO 9000ff and 10012 series of standards regarding the calibration
of inspection, measuring and test equipment at specified intervals.
- To document that the vacuum gauges calibrated are traceable to the national standard of the PTB.
DKD recalibration ...................................................................................................................... 90 02 17

Replacement of the battery

Note: Some of the components on the printed circuit board are sensitive to electrostatic discharge.
Do not touch components. If necessary, ground the printed circuit board and the person replacing the
battery suitably.
Attention: Use only a battery of the recommended type (see "Technical data").
The battery must not be charged or connected to an external voltage.
printed circuit board
battery
➨ Unscrew the four countersunk head screws at the rear side
of the housing by using a Phillips screw driver.
➨ Disassemble the housing parts carefully.
➨ Remove the battery.
➨ Insert the new battery in the battery compartment correctly
matching the positive and negative polarity (as shown by
the engraving inside the compartment).
☞ When reassembling the vacuum gauge, make sure that the
switch pad and the printed circuit board are positioned cor-
rectly.
➨ Carefully screw both parts of the housing together.
switch pad
15.07.2003
➨ Press key UP/DOWN to adjust the display from
"0" ("zero") to the actual reference pressure in
the vacuum line in the range of 0 to 20 mbar (0
to 15 Torr).
➨ Press key ON/OFF to confirm adjustment and
to terminate mode.
-3 mbar to 1000 mbar in accordance with