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Operating Instructions - CPG2500
Precision Pressure Indicator
CPG2500
10.10 Head Pressure
The Head Pressure Application provides an automated way to calculate the head pressure offset be-
tween a device being tested and the CPG2500 sensor, based on:
• Media: pneumatic or hydraulic
• Height: the difference between the device under test and the sensing element in the transducers (in-
ternal and external) in the CPG2500
• Media Density: the media density of the pressure media
• Media Temperature
• Local Gravity
The Head Pressure application is placed under the password protected area of the operator interface to
safeguard against inadvertent activation. It is intended to be used to accurately measure the pressure at
an external source that is at a different elevation from the CPG2500 transducer sensing that pressure.
The four parameters are used to calculate the pressure that is a result of the different elevations. It should
not be used when calibrating CPG2500 transducers. The Head height should be set at zero before cali-
brating the transducers of the CPG2500.
i
Notice
The Head Pressure should not be active when calibrating CPG2500 transducers.
The Head height should be set at zero before calibrating the transducers of the
CPG2500. Difference in height between the laboratory standard and the CPG2500
during calibration should be factored into the uncertainty analysis.
Figure 10.10-A shows the Head Pressure pneumatic screen. The height, media density (Nitrogen or dry
air), media temperature and local gravity can be entered here based on the specific setup of the system.
Figure 10.10-A - Head Pressure, Pneumatic
Содержание CPG2500
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