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WIKA operating instructions, model CPH7650
EN
14261987.02 01/2019 EN/DE
6. Commissioning, operation
6.3 Switching on the pressure calibrator
By pressing any button, the model CPH7650 portable pressure calibrator will be switched
on. The calibrator requires a warm-up for a few minutes (max. 5 minutes) to reach its
specified accuracy. Large changes in ambient temperature may make a longer warm-up
period necessary. The pressure display of the calibrator should be zeroed before starting
the pressure calibration.
Instrument features
The instrument features 3 operating modes:
MEASURING
/
CALIBRATION
/
SWITCH
TEST
, which offer the maximum convenience in relation to its application. For supplying
the test items and to read their measuring signals, there are electrical inputs and outputs
available.
MEASURE
and
CALIBRATION
In the
MEASURING
(with test item) and
CALIBRATION
operating modes, the measured values of both the reference
pressure sensor and the test item, as well as their deviation,
are displayed in both current pressure units and in %. In this
way the operator is immediately informed online whether the
test item meets the class accuracy or not.
SWITCH TEST
The calibration data in
CALIBRATION
mode are stored
internally and can later be transferred onto printable
certificates through software (WIKA-Cal).
With respect to the transfer of data to a PC, the model CPH7650 pressure calibrator has a
USB interface, selectable via menu.
SETUP menu
Using the
[SETUP]
button, one can access the
SETUP
menu, where the required
operating mode (
MEASURING
/
CALIBRATION
/
SWITCH TEST
) can be selected and
configured, a stored function can be recalled or a general instrument setting (such as the
menu language) can be changed.