Zero Point Setting And Offset Correction; Reference Pressure Sensor Cpt6000 - WIKA CPH7650 Betriebsanleitung

4. Design and function
Available units, including their conversion factors in relation to the unit bar
bar
mbar
EN
hPa
psi
inHg (0 °C)
cmHG (0 °C)
MPa
kPa
Pa
mH O (4 °C)
2
cmH O (4 °C)
2
mmH O (4 °C)
2
kg/cm
2
inH O (60 °C)
2
mmH O (0 °C)
2

4.5.3 Zero point setting and offset correction

Zero point setting for overpressure sensors
If the measured value shown on the CPH7650, with an overpressure 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
allowable correction value is twice the magnitude of the class accuracy).
Offset correction for absolute pressure sensors
For absolute pressure sensors, an offset correction can be made via the menu (see
chapter 6.4.3 "SETUP additional menu items: Reference sensor").

4.5.4 Reference pressure sensor CPT6000

For the model CPH7650 pressure calibrator, there are many reference pressure sensors
to choose from, with accuracies of 0.025 % which can be interchanged quickly and
without tools. When the pressure calibrator is switched on, the reference pressure sensor
attached is recognised automatically, so that no further configuration of the sensor is
needed.
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1.00000E+00
1.00000E-03
1.00000E-03
6.89475E-02
3.37690E-02
1.33322E-02
1.00000E+01
1.00000E-02
1.00000E-05
9.80670E-02
9.80670E-04
9.80670E-05
9.80665E-01
2.48800E-03
1.33322E-03
WIKA operating instructions, model CPH7650