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WIKA operating instructions hydraulic high pressure controller, model CPC8000-H
PN 0018708001B 11/2020 EN
EN
11. Accessories
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Barometric reference sensor (for pressure emulation)
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Barometric reference calibration sled
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CPR8000 reference pressure sensor calibration sled with power supply
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CPR8050/8850 reference pressure sensor calibration sled with power supply
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Operating fluid: Sebacate or Shell Tellus.
11.1 Barometric Reference Sensor
The CPC8000-H can be ordered with an internal barometric reference sensor. It is a very stable, absolute pressure transducer,
used to accurately measure local atmospheric pressure. It is used to display the barometric pressure (reading appears on the
bottom right side of the display) or as a barometric reference for pressure emulation. The barometric reference sensor is installed
inside the CPC8000-HC controller.
11.1.1 Emulation Mode Accuracy
The accuracy in emulation mode is different than native mode.
The barometric reference has six significant digits and has a guaranteed drift of 0.0000041 psi over a 24 hour period.
The absolute uncertainty of the barometric reference must be considered in the emulated pressure uncertainty.
11.1.2 Barometric Reference Calibration
The Barometric Reference Transducer can be calibrated in exactly the same manner as the other installed components as
described in Section 8.2 Recalibration. Alternatively the barometric reference can be calibrated outside of the instrument using a
calibration sled or adapter (Section 11.2 Barometric Reference Calibration Sled).
11.2 Barometric Reference Calibration Sled
The Barometric Reference Calibration Sled Kit is available to provide a way to calibrate the barometric reference remotely.
Calibration of the Barometric Reference can be performed remotely using the Cal sled, a PC and the software provided.
Figure 11.2 Barometric Reference Calibration Sled
11.3 Reference Pressure Calibration Sled
The CPC8000-H can be ordered with up to two internal reference pressure transducers. These are used to monitor pressure on the
Measure/Control port. These transducers can use a calibration sled with power supply and software to perform calibrations at their
required calibration interval.
11. Accessories