Product Description

The Bently Nevada 177313 series designates the electric-driven TK-3e Proximity System Test Kit, an industry-standard calibration instrument used to verify the operational integrity of proximity transducer loops and machinery protection monitors. By mechanically simulating actual shaft vibration and static position, the 177313 series allows instrument technicians to check loop linearity, verify sensor scale factors, and calibrate alarm trip points directly in the field or workshop. This kit is an essential component for preventive maintenance and turnaround verification in power generation, petrochemical refining, and heavy manufacturing facilities.

Suffix Breakdown & Ordering Matrix

The 177313 base model requires three specific suffix selections (177313-AA-BB-CC) to define the mechanical scale, power configuration, and hazardous area compliance:

• AA — Scale Units Option:
  • 01: English Imperial Micrometer (Calibrated in Mils, 0 – 1000 mils range)
  • 02: Metric Micrometer (Calibrated in Millimeters, 0 – 25.4 mm range)
• BB — Power Cord Type Option:
  • 01: American standard power cord (110 Vac configuration)
  • 02: European standard power cord (220 Vac configuration)
  • 03: United Kingdom standard power cord
  • 04: Australian standard power cord
• CC — Agency Approvals Option:
  • 00: No Approvals / Standard Commercial Option
  • 01: CSA/NRTL/C (Class I, Division 2, Groups A, B, C, and D)

Technical Specifications

Compatibility & Engineering Notes

• Target Material Specification: The target button and motorized wobble plate are manufactured from AISI 4140 alloy steel to match standard industrial turbomachinery shafts. Calibrating eddy-current proximity probes against non-standard metals (e.g., aluminum or stainless steel types other than 4140) will yield incorrect voltage scale factor readings.
• Test Instrument Requirements: No external oscilloscope is required to verify dynamic vibration amplitudes. Technicians can calculate exact peak-to-peak mechanical displacement using only a standard digital multimeter to read the corresponding change in DC voltage from the Proximitor Sensor.
• Voltage Compatibility Warning: Always verify the specific power cord option (BB) before applying mains voltage. Powering a 110 Vac unit (BB=01) with a 220 Vac source will result in immediate damage to the internal motor controller circuitry. Conversely, running a 220 Vac unit on a 110 Vac source prevents the drive motor from reaching its rated cpm.

Important Field Safety & Operation Advice

• Probe Tip Protection: Never adjust the physical clearance of the proximity probe while the wobble plate motor is spinning. Always position the probe and establish the baseline mechanical gap while the unit is completely stopped to prevent the steel target from striking and shattering the ceramic probe tip at high speed.
• Static Calibration Verification: Mount the probe into the spindle micrometer holder. Advance the micrometer until the target makes gentle contact with the probe tip, then set the micrometer zero. Back the probe away in precise, fixed increments (e.g., 10 mils or 0.25 mm) and verify that the Proximitor DC output matches the specified system scale factor (typically 200 mV/mil or 7.87 V/mm).
• Target Interface Maintenance: Prior to executing calibration routines, clean the AISI 4140 steel target surface to remove grease, dirt, or preservative oils. Scratches, pit marks, or particulate matter on the target introduce electrical runout that corrupts the sensor linearity data.