Wika CPH6000 Manual de usuario descargar pdf (Pagina 47)

47WIKA operating instructions ProcessCalibrator, model CPH6000

11069023.04 11/2012 GB/D

Figure A

With this example, the denition of individual test points/pressure steps for a calibration

is claried. It is possible to prepare up to 16 calibrations, each with up to 32 test points.

■

Accessing the menu points:

Via

and selection of the menu point: CALIBRATION (see chapter

7.3.3 "CALIBRATION mode")

Enter the desired test points in the way described on the previous page.

With the calibration of pressure measuring instruments with electrical output signals

(pressure transmitters/transmitters) the reference is calibrated to the display (i.e. the

pressure is always adjusted so that the reference value matches the setpoint exactly).

Since in all cases, an exact setting of the pressure is not always possible, along with the

actual value (test item value) and the setpoint (reference value), the true reference value

is also recorded.

With "PrintCal“ software one of the two combinations can be listed in the calibration

certicate.

If the calibration is to follow DKD/DAkkS guidelines, then the measured

value for the subsequent test point should not be recorded until a

dened time has passed (for example 30 sec.), consisting of a load

change time and settling time (see g. A Calibration cycle to DKD/

DAkkS directive 6-1 for measurement uncertainty > 0.6 % of measuring

span).

7. Commissioning, operation

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Wika CPH6000 Manual de usuario Pagina 47