Measuring Pressure; Media Compatibility - WIKA Obsolete CPH65I0 Betriebsanleitung

6 Commissioning, operation
6.6

Measuring pressure

To measure pressure, connect the calibrator using an appropriate fitting. Choose a pressure
setting for the display being used. The calibrator is equipped with one or two internal sensors. Be
sure to choose the sensor based on working pressures and accuracy.
WARNING!
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 the nominal range by 120
% or when a vacuum in excess of 140 mbar (2 PSI) is applied on gauge range
sensors.
Use the "ZERO" key to zero the pressure sensor once it is vented to atmospheric pressure.
To protect sensor integrity and prevent damage to the sensor, the calibrator will
display OL [overload] when the applied pressure exceeds 120% of the full scale
calibrated range of the sensor.
To ensure accuracy of the calibrator it is necessary to zero the calibrator before a
device is calibrated.

6.6.1 Media compatibility

The calibrator utilizes a media isolated sensor to prevent sensor contamination. Whenever
possible, clean, dry air is the media of choice. If that is not always possible, make sure that the
media is compatible with Nickel Plated Brass and 316 Stainless Steel.
WIKA Operating Instruction, Model CPH65I0
GB
25