High-End Pressure Controller
CPC8000
70
Operating Instructions - CPC8000
7.5.2.1 Calibration Environment
For maximum accuracy, allow the CPC8000 to warm up for a minimum of 30 minutes in an ambient
temperature within the compensated range prior to commencing a calibration. In addition the instrument
should be at rest on a stable platform that is free of excessive vibration and shock.
7.5.2.2 Calibration Pressure Standards
Mensor recommends the use of appropriately accurate pressure standards when calibrating this instru-
ment. Such standards should be sufcient so that when the techniques of the ISO Guide to the Expres-
sion of Uncertainty in Measurement (GUM) are applied, the instrument meets its accuracy statements as
required by ISO/IEC 17025:2005, or other applicable standards.
7.5.2.3 Calibration Media
Gas media are required for calibration. The recommended medium is dry nitrogen or clean, dry, instru-
ment air.
7.5.2.4 Calibration Setup
Refer to the calibration setup illustration on the following page (
see fgure 7.5.2.4 - Calibration Setup
).
The illustration shows a typical calibration setup for absolute and gauge pressure instruments.
The ‘Pressure Standard’ is normally a deadweight tester, a precision piston balance or a precision
manometer. The ‘Volume Controller’ refers to a hand operated variable-volume pressure vernier device.
A diaphragm type vacuum gauge is recommended over the gauge tube type of vacuum sensor for
calibrating sub-atmospheric pressures (shown in the illustration under “Setup for Absolute Pressure”). A
vacuum source with a capacity to generate 600 millitorr absolute is recommended.
Summary of Contents for CPC8000
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