WIKA CPH7600 - Handbuch (Seite 28)

28 WIKA operating instructions, model CPH7600
14051628.01 11/2012 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 an internal
pressure sensor and optional external pressure modules are available. 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").
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 110 %.
Use the ZERO key to zero the pressure sensor once it is vented to
atmospheric pressure.
6.7.1 Media compatibility
CAUTION!
The calibrator should only be used with clean, dry gases! To prevent
contamination by the test pieces, the use of a dirt trap is recommended
(see chapter 10 "Accessories")!