Epro Emerson PR9350/04 LVDT Sensor Probe

Configured for shaft displacement, position, and eccentricity measurement in steam, gas, and hydro turbines, the Emerson PR9350/04 (PR9350 LVDT Sensor Probe) provides direct physical execution.

Hardware Specifications

Signal Conditioning & Loop Dynamics

The sensor utilizes primary and secondary winding flux coupling via a movable core, operating with a carrier frequency of 3 to 5 kHz and 250 pF winding capacitance. System verification requires precise gap voltage validation and channel-to-channel isolation checks to eliminate signal cross-talk and maintain linear position feedback across thermal expansion cycles.

Frequently Asked Questions

Q: What power source is required to excite the LVDT windings? A: The sensor requires an AC excitation voltage of 5 Vrms driven at a carrier frequency between 3 and 5 kHz.

Q: How does ambient temperature affect measurement integrity? A: The core winding assembly limits total temperature-induced measurement drift to less than 3% across the entire -20 to 100 deg C operating range.

Field Installation Guidelines

• Ensure a minimum of 5 full threads of engagement when mounting into tapped turbine housing ports.
• Route LVDT primary and secondary wiring through grounded metal conduit away from high-voltage motor leads and variable frequency drive (VFD) outputs to prevent high-frequency interference.
• Verify that signal cable shielding is grounded at a single point (typically at the cabinet barrier/rack terminal) to eliminate ground loops.
• Use a feeler gauge or calibrated micrometer to establish mechanical zero clearance prior to initial power-up.