Operating Instructions - CPC3050
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High-Speed Pressure Controller
CPC3050
To calibrate the”High Point”:
5. The “High Point” Calibration is done in a similar way as the “Low Point”.
6. Supply a pressure to the Measure/Control Port of the CPC3050 being calibrated, using a pressure
standard. This pressure should be as close as possible to the full scale value of the selected trans-
ducer or at least within 20% of the active transducer’s span.
7. After the pressure stabilizes, record live reading shown on the Two Point Cal screen and enter this
value as the “High Reading” by pressing the High Reading button and entering the number followed
by the check mark [
] or press main reading button. Record the “true pressure” obtained from the
reference standard and enter it as the “High Reference” value in the same manner.
8. After all four values (High Reference, High Reading, Low reference, & Low reading) have been en-
tered, the Adjust button will become active. Press the Adjust button to check and accept the calibration
data then press the Save button. The instrument will then prompt with the question “Save Cal Data?”.
Pressing the check mark [
] in this screen will save the calibration to the memory of the transducer.
Figure 10.8 B - Two Point Calibration
10.9 Linearization
The Linearization 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 per-
formed by connecting a suitable pressure standard to the Measure/Control port of the CPC3050
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 Lineariza-
tion Matrix shown in Figure 10.9-A. Linearization of each transducer can be performed from
this screen by selecting each transducer range from the setup screen. The “Clear Linearization”
selection sets linearization back to its default settings (slopes set to 1, intercepts set to 0). This
may be used when overlaying a new correction upon an old correction fails.
