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DPI 740 User Manual
4 CALIBRATION
The instrument is supplied with a calibration certificate. For
the instrument to stay accurate it is recommended that it is
checked every 12 months.
The recommended equipment for calibration is a
compensated deadweight pressure standard or similar
equipment to provide the required accuracy.
The following procedures should be carried out in a
controlled environment by qualified instrument
calibration personnel
If the accuracy of the instrument is not within the
specification, carry out a calibration adjustment
procedure.
The manufacturer offers a comprehensive and, if required,
NAMAS accredited calibration service.
Calibration Check
A calibration check should be carried out at chosen intervals. The
readings of the instrument should be compared with a pressure
standard and, after any adjustments for accuracy (traced to National
Standards), the differences recorded. The adjusted differences can then
be compared with the required accuracy for the instrument. If
necessary a calibration adjustment can be carried out.
The recommended procedure is to check at increasing and then
decreasing intervals of 0, 20, 40, 60, 80 and 100% of full-scale
.
.
K0200 Issue No. 1
33
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