Bently Nevada 87199-01 | 6-Channel Rod Drop Monitor Analog Assembly for 3300 Series In Stock

Description

At-A-Glance Executive Brief

• Model: 87199-01
• Brand: Bently Nevada (Baker Hughes)
• Part Type: 6-channel Rod Drop Monitor Analog Assembly
• Lifecycle status: Legacy machinery monitoring module; stocked for brownfield 3300 series retrofits
• System compatibility: Bently Nevada 3300 monitoring rack, reciprocating compressor rod drop sensors, transmits 4–20mA analog and alarm data to DCS/SCADA
• Weight: ~0.75 kg

Technical Introduction

Failure of the 87199-01 interrupts rod drop displacement measurement for reciprocating compressors. Loss of rod drop monitoring removes protection against catastrophic crosshead or piston rod failure; the system cannot detect rod deflection, wear or looseness, and will stop sending measurement values and alarm status to the DCS HMI. The Bently Nevada 87199-01 is a 6-channel analog rod drop monitor card designed for the 3300 series machinery monitoring rack. It receives eddy current proximity probe signals from reciprocating compressor piston rods, measures real-time rod drop displacement and detects abnormal rod deflection caused by crosshead wear, loose connections or mechanical fatigue. Each channel supports independent alarm threshold configuration for alert and danger setpoints. The module converts raw gap signals into standard analog outputs and hardware relay alarms. It continuously monitors sensor health for open/short circuit faults. Process measurements, channel status and fault alarms are sent to the 3300 system host and mirrored to plant DCS for trending, asset health tracking and operator alarming. It is widely deployed in refineries, petrochemical and gas pipeline facilities on critical reciprocating compressors. Maintenance teams keep spare 87199-01 assemblies to restore rod drop protection quickly during planned outages.

• Best Suited For
  • Bently Nevada 3300 series rack machinery monitoring systems
  • Reciprocating piston compressor piston rod drop displacement monitoring and alarm protection
  • Direct drop-in replacement for existing Bently Nevada 87199-01 6-channel rod drop analog assembly hardware

Core Technical Specifications

Field Engineer’s Tech Notes

• Confirm rack firmware revision and probe compatibility before replacement; this module is dedicated to reciprocating rod drop measurements and cannot be used for standard shaft vibration by default.
• Lockout/tagout and sensor bypass procedures must be followed before removing the module to avoid unplanned compressor trips.
• Use properly shielded, grounded probe cabling; noise and ground loops cause erratic rod drop readings.
• After replacement, re-calibrate probe gap, configure alarm thresholds, perform channel loop tests, validate DCS analog values and clear fault alarms before removing bypasses.
• ESD protection mandatory while handling exposed PCB.
• Verify proximity probe and extension cable integrity; damaged probe assemblies are a common source of intermittent channel faults.

Adaptive QA & Testing Protocol

Each 87199-01 analog assembly is bench tested in a Bently Nevada 3300 rack test fixture. We verify backplane communication and rack recognition. All six channels are tested with proximity probe signal simulator across full measurement range. Alert/danger alarm trip points and sensor fault detection (open/short) are simulated and validated. 4–20mA analog output calibration and relay alarm action are checked. PCB, edge connector and component solder joints are visually inspected. Full test reports or bench test video clips are available upon request.

Buyer’s FAQ

Q: What is Bently Nevada 87199-01 used for? A: It is a 6-channel rod drop monitor analog assembly for the Bently Nevada 3300 rack, used to measure piston rod deflection on reciprocating compressors and trigger alarms before mechanical failure occurs.

Q: What warranty applies for refurbished and NSFP 87199-01? A: Refurbished and NSFP units carry a 12-month hardware warranty. Coverage excludes ESD damage, probe/cable faults, improper calibration, wiring noise, and incompatible 3300 rack firmware.

Q: What lead time should I expect? A: Stocked units ship 3–7 business days. If inventory is depleted, lead time increases while we source surplus Bently Nevada 87199-01 modules.

Q: Can 87199-01 monitor rotational shaft vibration? A: Not directly. It is purpose-built for reciprocating compressor rod drop displacement measurement; use dedicated 3300 vibration monitor modules for rotating shaft vibration.