WIKA CPH7600 - Handbuch (Seite 27)

27 WIKA operating instructions, model CPH7600
14051628.01 11/2012 GB/D
GB
6. Commissioning, operation
6.6 First usage and various operating modes
The model CPH7600 hand-held pressure calibrator is supplied with a special
low-volume calibration hose to enable faster pressure generation and quick pressure
stabilisation. Included in delivery are "Quick-fit" hose connectors and various adapters.
It is recommended that this hose is used in order to achieve the best results. As soon as
the fittings are installed and the calibrator is connected to the test item the calibrator is
ready for use.
The calibrator offers 3 operating modes.
6.6.1 Pressure supply via external compressed air
Turn the "MAIN SELECTOR" rotating selection knob to the left, to P2. The calibrator
can only be supplied with an external air pressure of a max. 8.3 bar on the pressure
connection P1. Via the "REGULATOR" pressure control valve, air pressure to a max.
of 7 bar is delivered through the calibrator to the pressure connection P2, to which the
test item is connected. By turning the pressure regulating valve anti-clockwise, the
pressure in the system is increased; clockwise, the pressure is reduced. The calibrator
simultaneously measures the pressure and indicates this on the display.
6.6.2 Pressure supply via integrated pump
Turn the "MAIN SELECTOR" rotating selection knob to the middle, to P3. The calibrator
can now generate pressure through the integrated electric pump at the press of a
button. Before generating pressure, select whether the pump should generate pressure
"PRESSURE" or should draw a vacuum "VACUUM". With the fine-adjustment knob
"FINE ADJUSTMENT", the pressure can be set very accurately. On the fine-adjustment
knob is the vent valve "VENT". Using this, the pressure can be released, so that the
system is completely vented.
By pressing the pump button "PUMP", the pressure is applied to the pressure
connection P3, to which the test item is connected. As long as "PUMP" is pressed,
pressure will be generated. As soon as "PUMP" is released, the pump will stop running.
After the pump has stopped, it can take a few seconds before the pressure is stabilised.
With the fine-adjustment knob, the pressure can be set very accurately. The calibrator
simultaneously measures the pressure and indicates this on the display. The integrated
pump can generate pressures from -0.8 … +20 bar.
6.6.3 Pressure measurement with integrated sensor
Turn the "MAIN SELECTOR" rotating selection knob to the right, to P4. The calibrator
measures pressure from -0.8 … +20 bar, which is applied on P4.