mensor CPG2500, Руководство по эксплуатации

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70 Operating Instructions - CPG2500
Precision Pressure Indicator
CPG2500
10 Calibration
The CPG2500 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 CPG2500 operated within its temperature band, and with proper zero and span adjustments,
will provide accurate pressure measurements.
The CPG2500 should have the calibration verified periodically to insure stability. The recommended
calibration cycle is one year or six months depending on the transducer range.
10.1 Environment
For maximum accuracy, allow the CPG2500 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. Hydraulic media can
be used above 15 psi. A height variation between the standard and the CPG2500 can cause significant
errors. A calculation should be made to compensate for this difference.