WIKA CPG2300 Series, Руководство по эксплуатации

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Operating Instructions CPG2300 Series 39
Portable Digital Pressure Gauge
CPG2300 Series
9. Calibration
The CPG2300 automatically adjusts the pressure readings for the effects of temperature
and non-linearity within the calibrated temperature range of 0-50°C. Thus, a calibrated
CPG2300 operated within its temperature band, and with proper zero and span set-
tings, will provide accurate pressure measurements.
The sensor should have the span verified periodically to insure its stability. Initially, the
recommended period between calibrations is 180 days. This period may be extended
as confidence is gained in the span stability.
9.1 Environment
Whenever possible, calibrate the CPG2300 at the same ambient temperature as
its normal operating environment. The temperature should be stable and within the
specified calibration range. In addition, for maximum accuracy, see that the CPG2300 is
at rest on a stable platform which is free of vibration and shock, and oriented similar to
its operating attitude.
9.2 Equipment
The following equipment is needed to calibrate a gauge transducer (see Figure 9.2):
1. A pressure source with a line-pressure regulator to cover the full scale pressure
range of the CPG2300.
2. A hand operated variable-volume pressure vernier (volume controller).
3. A metering valve and two isolating valves for Vent and Supply Pressure.
4. A pressure calibration standard.
5. Tubing and fittings adequate for the pressure range.
Additional equipment required to calibrate sub-atmospheric transducers (absolute,
vacuum or bi-directional pressure types) is illustrated in Figure 9.2. These items are:
6. A vacuum pump capable of pumping down to 300 millitorr.
7. A vacuum standard to measure pressures down to 300 millitorr.
8. One additional valve to isolate the vacuum line.