GMC-I Messtechnik GmbH 31
13 Recalibration
The measuring tasks performed with your instrument, and the
stressing it’s subjected to, influence aging of its components any
may result in deviation from the specified levels of accuracy.
In the case of strict measuring accuracy requirements, as well as
in the event of use at construction sites with frequent stress due
to transport and considerable temperature fluctuation, we recom-
mend a relatively short calibration interval of once per year. If your
instrument is used primarily in the laboratory and indoors without
considerable climatic or mechanical stressing, a calibration inter-
val of once every 2 to 3 years is sufficient as a rule.
During recalibration* at an accredited calibration laboratory (DIN
EN ISO/IEC 17025), deviations from traceable standards demon-
strated by your measuring instrument are documented. Ascer-
tained deviations are used to correct displayed values during later
use of the instrument.
We would be happy to perform DKD or factory calibration for you
at our calibration laboratory. Further information is available at our
website:
www.gossenmetrawatt.com ( Services DKD Calibration
Center or FAQs Question and Answers Regarding Calibra-
tion).
Recalibration of your instrument at regular intervals is essential for
the fulfillment of requirements according to quality management
systems per DIN EN ISO 9001.
* Examination of the specification, as well as adjustment, are not included in calibra-
tion. However, in the case of our own products, any required adjustment is per-
formed and adherence to the specification is confirmed.
14 Appendix
14.1 Sample Connection Layouts for Insulation Resistance
Measurement
Insulation Resistance Measurement per DIN VDE 0100, Part 600
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