Pressure Measurement; Zero Point Setting Of Gauge Pressure Sensors; Offset Correction For Absolute Pressure Sensors - WIKA CPH6000 Betriebsanleitung

6. Commissioning, operation
6.4

Pressure measurement

For pressure calibration, connect the test item to the test item connection. Choose a reference sensor that is suitable for the
pressure range and accuracy.
CAUTION!
Incorrect pressure
Pressure sensors may be damaged and/or injuries may occur to the personnel due to a too high pressure
loading.
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For a better understanding with respect to overpressure and burst pressure, follow the specifications laid
down in these operating instructions (see chapter 10 "Specifications").
When a too-high pressure is applied, Overflow is shown on the display. An intermittent audio alarm sounds and the display
only shows lines, rather than a measured value.
As soon as these signals occur, the pressure must be reduced immediately to prevent damage or possible physical injury.
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The aforementioned signals occur when the pressure exceeds 110 % of the nominal range of the reference pressure
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sensor.
If the measured value of the CPH6000, with a connected reference pressure sensor and a vented test assembly, is not
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equal to zero, then a zero point or offset correction can be carried out, see following chapters.
6.5

Zero point setting of gauge pressure sensors

If the measured value shown on the CPH6000, with a reference pressure sensor connected and the test assembly vented
to atmosphere, is not equal to zero, then by pressing the [CLEAR] button twice (within five seconds), the zero point can be
corrected.
Maximum permissible correction value is equal to 2-times the class accuracy.
6.6

Offset correction for absolute pressure sensors

For absolute pressure sensors, an offset correction can be made via the menu (see chapter 6.9.3 "Reference sensor").
WIKA operating instructions, pressure calibrator model CPH6000
Test item (mechanical)
EN
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