34
WIKA operating instructions, model CPH65I0
14061681.02 03/2013 GB/D
GB
6. Commissioning, operation
6.7 Measuring pressure
For pressure calibration, connect the calibrator with an appropriate adapter. Select the
pressure setting for the display being used. The calibrator is equipped with one or two
internal reference pressure sensors.
Choose a sensor that is suitable for the pressure range and accuracy.
CAUTION!
Pressure sensors may be damaged and/or injuries may occur to
the personnel due to improper application of pressure. For a better
understanding with respect to overpressure and burst pressure, follow
the specifications laid down in these operating instructions (see chapter
3 "Specifications"). Vacuum should not be applied to any gauge pressure
sensor.
The calibrator display will indicate
"OL"
when an inappropriate pressure
is applied. As soon as
"OL"
is observed on any pressure display, the
pressure should be reduced immediately to prevent damage or possible
physical injury.
"OL"
is displayed if the pressure exceeds 110 % of the
nominal range of the sensor or if a vacuum in excess of 140 mbar (2 psi)
is applied on a gauge pressure sensor.
Figure 2: Pressure measurement
Valve