Zero Button; Pressure Connections; Overpressure Protection - WIKA CPC2000 Manual De Instrucciones

4. Design and function

4.5.4 ZERO button

Button for manually correcting the zero point of the integrated sensor.
External influences such as temperature, pressure, mounting position or
EN
surroundings, can alter the zero point of the instrument, i.e. the display
when the pressure ports are open. During zero adjustment, the device
automatically detects these changes and corrects them in the current
pressure display. The zero point adjustment requires a change of the
internal valves, which is not possible without loss of pressure.
(If this should interfere with the application, the automatic zero point
adjustment can be switched off.)
4.6

Pressure connections

Differential pressure instruments are connected to the
■
instrument.
Relative pressure instruments are connected to the
■
open to atmosphere).
Instruments for negative gauge pressure are connected to the
■
( connection is open to atmosphere).
j
Only connect test and calibration installations once the system has been
depressurised!
Never perform functional tests with compressed or medical air. This can
damage instruments with low pressure ranges.
The connection to the low-pressure controller is made via a 6.6 x 11 mm pressure
connection. The hose diameter should be 6 mm.
4.7

Overpressure protection

The maximum permissible pressure must not be exceeded:
Pressure range
1 mbar
10 mbar
50 mbar
100 mbar
500 mbar
1,000 mbar
16
j
connection (
j
Overload
5 times overload
5 times overload
5 times overload
5 times overload
2 times overload
2 times overload
WIKA operating instructions, model CPC2000
and the connections of the
i
connection is
i
connection
i