Wika CPH7600 Manuel d'utilisateur télécharger pdf (Page 37)

37WIKA operating instructions, model CPH7600

14051628.01 11/2012 GB/D

6. Commissioning, operation

Figure 6: CPH7600 with a pressure transmitter with %-Error function

6.11.4 %-Error function

The calibrator features a special function which can calculate the error in the pressure

value from the mA value as a percentage of the 4 ... 20 mA span. The %-Error mode

uses all three screens and has a special menu structure. It displays pressure, mA and

%-Error simultaneously.

Example:

Suppose a pressure transmitter under test has a full scale range (measuring range) of

20 bar and gives a corresponding 4 ... 20 mA output signal. The user can programme in

a 0 ... 20 bar pressure span into the calibrator and the calibrator will then calculate and

display the deviation or %-Error value from the 4 ... 20 mA output. This then eliminates

manual calculations of the test item deviation.

Use small-volume hose lines, as for as

possible

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Wika CPH7600 Manuel d'utilisateur Page 37