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WIKA operating instructions pneumatic high pressure controller, model CPC7000
0019104001D 10/2018 EN
EN
9.2.9 Linearization
The Linearize Application provides a place to record upscale and downscale calibration data and to linearize each
transducer using that data. An “as found calibration” can be performed by connecting a suitable pressure standard
to the Measure/Control port of the CPC7000 being calibrated, and supplying between 3 and 11 pressure points
across the complete range. The pressure points may be entered using both upscale and downscale pressure points,
or only one direction. The record of the pressures from the pressure standard and the corresponding reading from
the instrument’s transducer can be recorded and transcribed into the Linearization Matrix. Linearization of each
transducer can be performed by selecting each transducer range from the setup screen.
Figure 9.2.9-A Linearization App Data Matrix
The Linearization Application automatically populates the screen with equidistant increments from the low to high pressure
corresponding to the range of the transducer selected. These values can be changed to reflect the values generated by the
reference standard and the corresponding readings taken from the CPC7000. Each value from the reference standard can be
entered under the reference column, corresponding Upscale and Downscale readings from the instrument can be entered in the
“Actual” column or “Upscale” and “Downscale” columns. To enter a value simply press the number and a key pad will appear where
the number can be entered. Press the check mark [
] to accept each value. With upscale and downscale on, the “Average”
column automatically averages the upscale and downscale values.
When satisfied that all values have been entered correctly, press the adjust button and then the save button to save the new
calibration data in the transducer memory.
Figure 9.2.9-B Linearization Values
9. Maintenance and Recalibration
