Overview
Configured for eddy-current probe signal conditioning in the Bently Nevada 7200 proximity transducer system, the Bently Nevada 18745-03 (18745-03 Five Meter Proximitor) provides direct electrical excitation and signal conditioning for compatible 5 mm and 8 mm probe assemblies. The unit uses a combined probe and extension cable length of 5 m.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 18745-03 |
| Brand | Bently Nevada |
| Product Type | Five Meter Proximitor |
| System | 7200 Proximity Transducer System |
| Compatible Probe Diameters | 5 mm and 8 mm |
| System Electrical Length | 5 m combined probe and extension cable |
| Power Requirement | -17.5 to -26 VDC |
| Maximum Consumption | 12 mA |
| Conditioned System Range | 2.0 mm, beginning approximately 0.25 mm from target |
| System Scale Factor | 200 mV/mil; calibration conditions apply |
| System Frequency Response | DC to 10 kHz; -5% at 10 kHz |
| Proximitor Temperature | -51 to +100 deg C |
| Relative Humidity | Up to 95%, noncondensing |
| Monitor Interconnection | Three-conductor shielded cable |
Eddy-Current Probe Scaling and Signal Conditioning
The 18745-03 excites the compatible 7200 series probe and conditions the resulting target-distance signal for the monitoring system. The complete sensing chain uses the Proximitor, probe, extension cable, and monitor as a matched electrical arrangement.
The specified system scale factor is 200 mV/mil under the applicable calibration conditions. The conditioned system range is 2.0 mm, with measurement beginning approximately 0.25 mm from the target.
The 18745-03 supports 7200 family probes with 5 mm and 8 mm diameters. Therefore, replacement selection should verify both the probe diameter and the complete probe-to-monitor configuration.
The specified frequency response extends from DC to 10 kHz, with a -5% response point at 10 kHz. The Proximitor requires a -17.5 to -26 VDC supply and has a maximum consumption of 12 mA.
Frequently Asked Questions
Q: What probe sizes can the 18745-03 support?
A: The supplied catalog data identifies compatibility with Bently Nevada 7200 family probes having 5 mm or 8 mm diameters.
Q: What electrical cable length does the 18745-03 represent?
A: The 03 configuration specifies a 5 m combined electrical length for the probe and extension cable.
Q: How does the 18745-03 connect to the monitoring system?
A: The supplied data specifies a three-conductor shielded cable for monitor interconnection.
Field Installation Guidelines
Install the 18745-03 as part of the specified Bently Nevada 7200 proximity transducer sensing chain. First, verify the Proximitor model, probe diameter, probe lead, extension cable, and monitor configuration before installation.
Route the three-conductor shielded interconnection cable separately from high-current power conductors and sources of strong electrical interference. Maintain the cable shield and grounding arrangement specified by the applicable 7200 system installation documentation.
Before energizing the circuit, verify the DC supply polarity and confirm that the available supply remains within the specified -17.5 to -26 VDC range. Do not substitute a different probe or cable length without checking the resulting system calibration.
After installation, verify the probe gap and signal conditioning against the applicable 7200 system calibration procedure. Also confirm that the physical product marking corresponds to 18745-03 before placing the channel into service.
Reviews
There are no reviews yet.