VACUUBRAND DVR 2 - Manual (Page 12)

page 12 of 17
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-no.:
999001 / 04/04/2012
Control of measuring equipment
The VACUUBRAND DAkkS calibration laboratory is accredited by the Deutsche Akkreditierungsstelle
GmbH (national accreditation body of the Federal Republic of Germany) for the measurable variable
pressure in the pressure range from 7.5*10 -4 Torr to 975 Torr (10 -3 mbar to 1300 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 (accreditation number D-K-15154-01). The DAkkS is signatory to the multilateral
agreements of the European cooperation for Accreditation (EA) and of the International Laboratory Ac-
creditation Cooperation (ILAC) for the mutual recognition of calibration certificates.
Rely on 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
(Physikalisch-Technische Bundesanstalt; German national institute for science and technology and
the highest technical authority of the Federal Republic of Germany for the field of metrology and
certain sectors of safety engineering).
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 ”UP/DOWN” key 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 ”ON/OFF” key to confirm the adjust-
ment and to terminate the adjustment mode.
Adjustment to a reference pressure
Calibration in the factory
DAkkS calibration DVR 2 ............................................................................................................900217