WIKA CPH6300 - Handbuch (Seite 18)

6 Commissioning, Operation
18 WIKA Operating Instruction, Model CPH6300
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6.4 Special Features
6.4.1 Different Pressure Units
Depending on the connected sensors different units can be selected via menu (Unit). The
measuring range of the sensors may restrict the choice!
User-Unit
For pressure units, which are not covered by the ones printed on the display, there can be done a
manual setting for a “user-defined” unit.
Example:
To enable a reference pressure sensor CPT6200 to display the unit kg/cm
2 , following settings
(bold) have to be entered:
kg/cm 2
Torr atm at
bASE user: bar mbar bar bar
DP user: .0000 .0000 .0000 .0000
FACt user: 1.0197 .7433 0.9869 1.0197
6.4.2 Different measuring rates
Three different kinds of pressure measuring are supported. Two of them (P.dEt and FASt) are
working with high measuring frequency of more than 1000 measurings per second.
6.4.2.1 Standard measuring (slow)
Measuring rate 4 Hz, averaging and filter functions are active.
Application: Measuring of slowly changing or static pressures, e.g. leak testing,
atmospheric pressure, etc.
Highest accuracy, high noise immunity, low power consumption.
6.4.2.2 Peak detection (Peak detection)
Measuring rate >1000 Hz, the value is displayed unfiltered.
Application with logger function: Measuring of short pressure peaks or fast changing
pressures with a resolution of <1 ms. The cyclic logger function records the arithmetic
mean value, the highest and the lowest peak of the referring time interval.
This measuring is sensitive to noise (EMI, ...) and power consumption is
enhanced.
6.4.2.3 Fast filtered measuring (fast)
Measuring rate >1000 Hz, but the value is filtered (higher noise immunity than P.dEt,
short peaks will be filtered out), apart from that identical behavior like rAtE-P.dEt.
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