Configured for continuous machinery condition monitoring, the Bently Nevada 1900/65 167707-01 (1900/65 167707-01 General Purpose Equipment Monitor) provides direct physical signal acquisition and processing for vibration and speed parameters within industrial rotating machinery platforms.

Model Identification and Suffix Configuration

The 1900/65 monitor is designed as a standalone system for monitoring balance-of-plant equipment. The 167707-01 part number specifies a configuration optimized for standard sensor inputs, facilitating the interface of vibration and speed data into a localized monitoring framework without requiring complex backplane integration.

Hardware Technical Specifications

Rotor Dynamics and Mechanical Monitoring

The 1900/65 monitor utilizes eddy-current probe scaling to convert analog inputs into meaningful vibration data. Precise gap voltage validation at -24 VDC targets is maintained to ensure the transducer operates within the linear range. The monitor handles rotor dynamics data by applying a 0.09 Hz 1-pole low-pass bias filter to incoming signals, effectively suppressing noise while retaining phase information. Cross-talk suppression is managed through high-input impedance (10 kOhm for 3-wire voltage mode) and dedicated channel isolation, ensuring signal integrity across multiple speed and vibration measurement inputs.

Ordering Information

• 1 x 1900/65 167707-01 Equipment Monitor unit.

• 1 x Terminal block set for sensor and power connections.

• 1 x Installation and technical reference documentation.

Field Installation Procedures

• Mounting and Grounding

• Secure the monitor unit to a flat, grounded panel surface using the provided mounting holes to ensure thermal heat dissipation.

• Connect the chassis ground to the cabinet common to minimize EMI and protect the monitor against potential voltage surges.

• Signal Wiring

• Ensure all sensor cables are shielded and that shields are grounded at the monitor end only to prevent ground loops.

• Keep vibration signal cabling physically separated from high-voltage AC power lines to maintain input signal quality.

Frequently Asked Questions

• Does this monitor support hot-swapping?

  The 1900/65 is designed as a fixed-mount unit; while sensor inputs can be disconnected during operation, the module itself is not intended for hot-swap operations within a live power environment.

• How is the bias voltage set?

  The monitor provides a fixed -24 V bias for standard proximity probes, which is verified by checking the gap voltage at the sensor input terminal block.

• What is the role of the 2.4 kHz OK filter?

  The 2.4 kHz 1-pole low-pass OK filter is used to monitor the signal path health; if the signal exceeds this frequency, the monitor registers an OK fault condition.

• Can it handle 4 speed measurements simultaneously?

  Yes, the monitor is architected to process up to 4 distinct speed measurements concurrently using standard pulse-type inputs.

• Is the speed accuracy dependent on the rpm range?

  The speed accuracy is defined as +/- 0.5 rpm plus 0.015% of the reading, ensuring linearity across the 100 to 100,000 rpm measurement spectrum.

• How are vibration variables calculated?

  Vibration inputs are conditioned and scaled relative to the full-scale range, with an accuracy of +/- 1%, which is consistent across all standard monitoring channels.

• Does the monitor require software for configuration?

  The monitor is configured via a dedicated serial interface using manufacturer-specified software to define alarm setpoints and sensor scaling.

• Can I use this for TSI (Turbine Supervisory Instrumentation)?

  This monitor is primarily designated for "General Purpose" equipment; while capable of high-speed monitoring, it lacks the specific feature sets required for complex TSI turbine protection.