VACUUBRAND DVR 3 - Manual (Page 13)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual: 999072 / 12/01/2011
page 13 of 18
Control of measuring equipment
The VACUUBRAND DKD calibration laboratory is accredited by the Physikalisch-Technische Bunde-
sanstalt (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 engineer-
ing) for the measurable variable pressure in the pressure range from 10 -3 mbar to 1000 mbar in
accordance with the general criteria for the operation of testing laboratories defined in the DIN EN ISO/
IEC 17025:2000 series of standards.
Calibration in the VACUUBRAND calibration laboratory:
- To meet the requirements of the DIN ISO 9000ff and 10012 series of standards regarding the calibra-
tion of inspection, measuring and test equipment at specified intervals.
- To document that the vacuum gauges calibrated are traceable to national standards of the PTB.
Evacuate the vacuum gauge to an exactly known reference pressure within the range of 0 .... 20 mbar
(0 .... 15 Torr). Switch the 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 ac-
curacy 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.
➨ Press key ”UP/DOWN” to adjust the reading
from ”0” (”zero”) to the actual reference pres-
sure in the vacuum line in the range of 0 to 20
mbar (0 to 15 Torr).
➨ Press key ”ON/OFF” to confirm the adjust-
ment and to terminate the adjustment mode.
Adjustment to a reference pressure
Calibration in the factory
DKD calibration ...........................................................................................................................900217