Meriam MFT 4010 Modular Calibrator_HART Communicator - Manual (Page 18)

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Over Pressurization - Pressure Modules
If the MFT pressure sensor is over pressurized above its full-scale pressure range, an “Over range” warning
appears on the LCD above the engineering units of the affected sensor. If the applied pressure exceeds 20% of
the sensor’s full-scale range, the affected pressure measurement is replaced by an “Over range” warning. If this
occurs, immediately release the pressure until the MFT displays a normal reading. Although pressures are
displayed up to 20% over full-scale range, specified accuracy is guaranteed for full-scale range only.
xGI (Gauge Isolated) and xAI (Absolute Isolated) Modules are capable of withstanding up to 2x the sensor
range without sustaining damage.
xDN (Differential Non-Isolated) Modules are capable of withstanding up to 2x the sensor range when
pressurized on the high side only. When pressure is applied to both the high and low side simultaneously, all
xDN sensors have a 150 PSI pressure limit.
x is a place holder for the sensor module accuracy designator. See information in the Appendix for additional
sensor module information.
Note: Subjecting pressure sensor modules to pressure limits beyond those listed above may damage
the sensors and void the warranty.
Media Compatibility - Pressure Sensors
Differential (xDN) pressure sensors are for use with clean, dry, non-corrosive gases only.
Differential (xDI), Gauge (xGI) and Absolute (xAI) pressure sensor modules are compatible with fluid and gas
media compatible with 316 stainless steel.