Emerson EPRO EZ1900-040 Pressure Transmitter

Configured for pressure measurement and signal conversion in industrial process networks, the EPRO EZ1900-040 (EZ1900-040 Pressure Transmitter) provides direct physical/electrical execution.

Hardware Specifications

Signal Loop Integrity and Piezoresistive Measurement

The transmitter utilizes an internal piezoresistive sensing element to convert mechanical pressure variations into proportional piezoresistive bridge voltage changes. Signal conditioning circuitry processes the raw bridge output to deliver a linear 4-20 mA two-wire current loop response. Internal temperature compensation networks actively adjust for thermal drift across ambient operating thresholds, preventing offset errors during rapid temperature shifts. The wetted parts feature corrosion-resistant stainless steel construction to withstand exposure to hydraulic fluids, pneumatic media, and aggressive industrial chemicals without degradation of the pressure boundary.

Frequently Asked Questions

Q: What is the nominal supply voltage requirement for the 4-20 mA loop?

A: The device operates on a standard loop power supply of 12 to 30 VDC, depending on total loop resistance and load calculations.

Q: Is the transmitter protected against reverse polarity connection?

A: Yes. The internal terminal electronics incorporate diode protection circuitry to prevent physical hardware failure if supply polarity is inadvertently reversed during wiring.

Q: What is the maximum overpressure limit before sensor damage occurs?

A: The burst pressure rating is established at 2 times the nominal full-scale range, while proof pressure limits permit up to 1.5 times full scale without calibration shift.

Field Installation Guidelines

1. Ensure the process media temperature and static pressure do not exceed the specified operational limits of the sensor diaphragm prior to mechanical mounting.
2. Apply appropriate thread sealant or an O-ring seal compatible with the process media to the G 1/4 process connection, tightening to recommended torque limits to prevent leakage.
3. Terminate the 4-20 mA loop using shielded twisted-pair cable, grounding the shield exclusively at one end to minimize electromagnetic interference from nearby power circuits.
4. Verify loop continuity and output scaling with a calibrated digital multimeter before energizing the control system input channel.