Meriam MFT 4010 Modular Calibrator_HART Communicator Manual do Utilizador descarregar pdf (Página 21)

Vacuum and Absolute Pressure Calibration

Vacuum calibrations can be performed with an x

DN sensor module by venting the high pressure connection to

atmosphere and applying the vacuum to the low pressure connection. Atmospheric pressure is the reference pressure

for all vacuum measurements.

Absolute pressure calibrations use a x

AI sensor module. These sensor modules have an internal absolute zero

reference. Simply connect the pressure (or vacuum) source to the single port on the module.

The following diagram shows the connection for both a vacuum and an absolute pressure measurement. If the

process maintains a stable pressure, it can be used as the pressure source in some calibrations. Process

compatibility and pressure ranges of the sensor modules need to be considered for each application.

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Meriam MFT 4010 Modular Calibrator_HART Communicator Manual do Utilizador Página 21