Overview
The Bently Nevada 1900/55, also cataloged as the 1900/55 Fan Monitor, operates as a dedicated hardware component for fan vibration and operating condition monitoring within industrial machinery monitoring systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1900/55 |
| Brand | Bently Nevada |
| Product Type | Fan Monitor |
| Origin | USA |
| Weight | 1.32 kg |
| Dimensions | 19.8 x 15 x 11 cm (shipping size) |
| Operating Temp | -20 deg C to +70 deg C |
| Storage Temp | -40 deg C to +85 deg C |
| Humidity | 5-95% RH, non-condensing |
| Vibration Resistance | 5 g at 10-500 Hz |
| Power Supply | 90-250 V AC |
| Power Consumption | <= 15 W |
| Frequency Range | 10 Hz to 1 kHz |
| Alarm Outputs | 2 programmable outputs |
| Output Signals | 4-20 mA |
| Accuracy | +/- 1% of full scale |
| Isolation | 1500 V AC input/output |
| Tariff Code | 8537101190 |
Eddy-Current Signal Processing and Mechanical Monitoring
The Bently Nevada 1900/55 Fan Monitor processes vibration-related input signals through defined measurement channels and converts monitoring values into 4-20 mA output signals. Therefore, the module supports continuous condition observation for fan rotating components.
The monitor design follows Bently Nevada mechanical monitoring practices, including signal scaling verification and measurement stability control. Additionally, the input/output isolation of 1500 V AC reduces electrical interference between field wiring and monitoring circuits.
For rotating equipment analysis, the unit supports vibration frequency evaluation from 10 Hz to 1 kHz. Moreover, the programmable alarm outputs allow configuration according to defined operating limits.
Frequently Asked Questions
Q: What type of output signal does the Bently Nevada 1900/55 provide?
A: The 1900/55 provides a 4-20 mA analog output signal for connection to monitoring or control systems.
Q: What power supply range does the 1900/55 support?
A: The unit operates with a 90-250 V AC power supply input.
Q: Does the 1900/55 provide isolated signal processing?
A: Yes. The monitor provides 1500 V AC input/output isolation to separate field signals from external circuits.
Field Installation Guidelines
Install the Bently Nevada 1900/55 in a suitable industrial enclosure with proper mechanical support and environmental protection.
Use shielded signal cables for vibration-related field wiring. Connect cable shields according to the site grounding practice to minimize electrical noise coupling.
Separate AC power wiring from low-level measurement signal cables. Maintain proper cable routing to prevent electromagnetic interference from motors, contactors, and high-current conductors.
Verify input signal polarity, power supply voltage range, and output loop wiring before energizing the monitor. Confirm alarm settings after installation and compare measured values with expected machine operating conditions.
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