Bently Nevada 1900/55 Fan Monitor

Description

Bently Nevada 1900/55 Fan Monitor

bently 190055

Model Introduction

Model: 1900/55 Fan Monitor Part Number: 1900/55 (full ordering code e.g. 1900/55‑02‑01‑01‑01) Device Type: Stand‑alone panel‑mount four‑channel seismic vibration monitor for fans/blowers, belongs to Trendmaster 2000 product family Manufacturer: Bently Nevada (Baker Hughes) System Compatibility: Can operate standalone; also integrates into Trendmaster 2000 system via TIM interface. Accepts Velomitor seismic transducer input (190501‑CT low‑frequency Velomitor for slow‑speed fans). Not a 3500 rack card, cannot install into 3500 rack.

Application Scenarios: Industrial fans, blowers, cooling‑tower fans, auxiliary rotating machinery. Multi‑channel housing vibration monitoring, local display, multi‑level alarm relay protection. Complies with API‑670 for auxiliary machinery protection. Country of Origin: United States Lifecycle Status: OEM discontinued; only aftermarket refurbished / surplus spare‑parts available.

Important note: ‑ 4‑channel seismic velocity monitor, optimized for low‑speed fan equipment (≥90RPM) ‑ Communication option: Trendmaster‑Pro bus or 4‑20 mA analog output depends on ordering suffix code ‑ Different from 1900/25 & 1900/27 (single‑channel units); 1900/55 supports four sensor inputs

Technical Introduction

Core Functions

‑ 4‑channel Velomitor seismic transducer input, measures peak housing velocity vibration ‑ Optimized low‑frequency response for slow‑speed fan applications (1.5 Hz‑1000 Hz with 190501‑CT) ‑ Front‑panel LCD display, view each channel measured value and status ‑ Per‑channel independent Alert / Danger alarm thresholds ‑ Multi‑relay dry‑contact outputs; configurable relay behaviour: latching/non‑latching, energized/de‑energized, time‑delay setting via front keypad (no hardware DIP‑switch) ‑ Built‑in TIM interface for Trendmaster 2000 host connection; optional 4‑20 mA analog output board ‑ Transducer fault detection (sensor short/open‑circuit) ‑ Front‑panel LED status indicators: OK, Alert, Danger, Fault

Key Technical Specifications

Mechanical Feature

Panel‑mount standalone blue‑face unit, not rack‑insert card. Front face: LCD display, membrane keypad, status LED. Rear terminal block for sensor wiring, power supply, relay contacts and communication interface. Not hot‑swap; power‑off before modifying field wiring.

bently 190055

Adaptive Quality Assurance & Test Protocol

3.1 Factory Adaptive QA Procedure

1. Power‑on self‑diagnostic verification
2. Multi‑channel signal injection test with vibration simulator; verify measurement accuracy for each of 4 channels
3. Alarm threshold test: Alert / Danger relay trigger, time‑delay, latching‑mode function validation
4. Transducer fault simulation test (short / open circuit)
5. Communication interface test: Trendmaster‑Pro bus or 4‑20 mA output according to unit configuration
6. Environmental screening: temperature cycling, EMC noise‑immunity test
7. Serial‑number traceability, full functional‑test report archived

3.2 On‑site Acceptance Test Protocol

1. Visual inspection: Check housing, front‑panel keypad & LCD, rear‑side terminals without damage or oxidation
2. Wiring check: 4‑channel Velomitor sensor inputs, DC power supply, alarm relay wiring, communication/analog wiring
3. Power‑on test: Confirm OK LED lit, self‑test completes without fault
4. Configure per‑channel Alert / Danger thresholds, relay parameters (delay, latching mode) according to machinery specification
5. Inject simulated vibration signal channel‑by‑channel; verify LCD reading, alarm LED status and relay action
6. If fitted with Trendmaster‑Pro: verify remote data reading from Trendmaster 2000 host; if 4‑20 mA fitted cross‑check against DCS reading
7. Record part‑number, hardware‑revision, ordering suffix code and test‑result snapshot for site QA archive

Field Engineer Technical Notes

Installation Guidance

‑ Panel‑mount installation; maintain adequate ventilation behind panel ‑ Use matched Velomitor transducer cables; separate from high‑voltage power cables to avoid interference ‑ For slow‑speed fan (<600RPM): must use 190501‑CT low‑frequency Velomitor to guarantee low‑frequency response ‑ Two available communication options: Trendmaster‑Pro bus for Trendmaster 2000 host OR 4‑20 mA for DCS; determined by factory ordering suffix, cannot freely swap on‑site without hardware modification.

Field note: 1900‑series monitors are obsolete legacy auxiliary‑monitor hardware. Many end‑users replace 1900/55 with 2300‑series multi‑channel monitors.

Commissioning Tips

‑ All configuration parameters (threshold, delay, latching, unit, point ID) are set via front‑panel keypad, no DIP‑jumpers required ‑ Cross‑validate: local LCD reading shall match remote host / DCS reading ‑ Set proper transducer fault alarm for sensor cable break protection

Troubleshooting Common Issues

1. No display / power fail: Check 18‑36 VDC power supply and rear‑terminal connection
2. Channel fault alarm: Inspect Velomitor sensor and cable for open‑circuit / short‑circuit
3. No communication: Verify bus address, termination resistor and wiring consistency with unit ordering option

Diagnostic: Observe front‑panel LED status: OK / Alert / Danger / Fault

Maintenance & Spare‑part Recommendation

‑ No field‑serviceable internal components; replace complete 1900/55 unit upon hardware failure ‑ Spare‑part suggestion: Retain spare 1900/55 for legacy fan‑monitoring systems. Confirm ordering suffix code (communication/output option) before purchasing replacement unit. ‑ Preventive inspection during shutdown: check rear‑terminal tightening status, cable shielding and aging.

bently 190055

1900‑series monitor comparison table