Mensor/WIKA Operating Instructions Series CPG 2500
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Digital Pressure Gauge
SERIES CPG 2500
10. Calibration
The CPG 2500 automatically adjusts the pressure reading for the effects of temperature
and non-linearity within the calibrated temperature range of 15-45°C. The process is
referred to as dynamic compensation because each reading is so adjusted before it is
output to the display or to a communication bus. Thus, a calibrated CPG 2500 operated
within its temperature band, and with proper zero and span adjustments, will provide
accurate pressure measurements.
The CPG 2500 should have the calibration verified periodically to insure stability. The
recommended calibration cycle is six months.
10.1 Environment
For maximum accuracy, allow the CPG 2500 to warm up a minimum of 15 minutes in
ambient temperature within the compensated range prior to a calibration. In addition
the instrument should be at rest on a stable platform that is free of excessive vibration
and shock.
10.2 Pressure Standards
Mensor recommends the use of appropriately accurate primary pressure standards
when calibrating this instrument. Such standards should be sufficient so that when the
techniques of the ISO Guide to the Expression of Uncertainty in Measurement (GUM)
are applied, the instrument meets its accuracy statements as required by ISO/IEC
17025:2005, or other applicable standards.
10.3 Media
The recommended calibration medium is dry nitrogen or clean dry instrument air. A
height variation between the standard and the CPG 2500 can cause significant errors.
See “6.5.2.3.2 - Head Correction” in Section 6, Local Operation, for further information.
Summary of Contents for SERIES CPG 2500
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