3500/70M 176449-09+135489-01 Recip Impulse Velocity Monitor , China 3500/70M 176449-09+135489-01 Recip Impulse Velocity Monitor Manufacturers, Suppliers, Factory

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	3500/70M 176449-09+135489-01
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Specifications

Product Name	3500/70M 176449-09 + 135489-01
Type	Recip Impulse Velocity Monitor
Dimensions	2.5x25.6x24 cm
Weight	0.82 kg
Input Signal	Accepts 1 to 4 proximity probe signals
Input Impedance (Acceleration)	10 kΩ
Input Impedance (Velocity)	>1 MΩ
Special Inhibit	Contact closure, 5 VDC @ 390 µA typical
Power Consumption	7.7 W (nominal)
Input Sensitivity (Impulse Acceleration)	0.51–11.72 mV/(m/s²); 5–115 mV/g
Input Sensitivity (Acceleration 2)	0.51–11.72 mV/(m/s²); 5–115 mV/g
Input Sensitivity (Reciprocal Velocity)	3.54–22.64 mV/(mm/s); 90–575 mV/(in/s)
Input Sensitivity (Low Frequency Velocity)	3.54–22.64 mV/(mm/s)
Rack Space (Monitor Module)	1 full-height front slot
Rack Space (I/O Modules)	1 full-height rear slot
Buffered Outputs	One coaxial connector per channel (short-circuit protected)
Output Impedance	550 Ω typical
Recorder Output	+4 to +20 mA proportional to full-scale
Recorder Selection	One static data value per channel
Voltage Compliance	+12 V DC maximum
Load Resistance	600 Ω maximum
Resolution	0.3662 µA maximum
Update Rate	<100 ms
Accuracy	±0.05 mA typical; ±0.14 mA over temperature range
Impulse Acceleration Accuracy	±0.33% full-scale typical; ±1% maximum (excluding filters)
Band Start	0° to 359° (1° resolution)
Band Duration	1° to 360° (1° resolution)
Frequency Response (Bias Filter)	-3 dB at 0.01 Hz (1-pole)
Frequency Response (Low-Pass Not OK Filter)	-3 dB at 2400 Hz (1-pole)
Static Value Smoothing Filter	8-revolution average
High-Pass Filter	4-pole, 80 dB/decade, 24 dB/octave
Low-Pass Filter	4-pole, 80 dB/decade, 24 dB/octave
Alert Delay	1–60 s (1 s increments)
Danger Delay	0.1 s nominal or 1–60 s (1 s increments)

Description

The Bently Nevada 3500/70M 176449-09+135489-03 is a Recip Impulse Velocity Monitor designed specifically for reciprocating compressors, designed to handle mechanical loosening and cylinder impact signals. This module features crankshaft angle synchronization and, through precise signal conditioning and targeted detection, can identify valve malfunctions and piston wear, providing early warning and protection for large machinery.

Applications

Oil and gas refineries: Reciprocating hydrogen compressors used in hydrogenation units, using pulse speed monitoring to prevent valve breakage or connecting rod loosening.

Large fertilizer plants: Monitoring high-pressure reciprocating pumps in ammonia synthesis units, utilizing a "monitoring band" function to bypass normal mechanical noise and pinpoint critical stroke stages.

Chemical raw material plants: Operating in ethylene compressor units, integrating real-time impact data into the DCS system via a 4-20 mA recorder output.

Natural gas booster stations: Deployed in reciprocating drive units for pipeline transportation, utilizing high-precision filtering algorithms to ensure monitoring stability under extreme temperature variations.

Steel and iron smelting plants: Monitoring heavy-duty reciprocating air compressors in auxiliary power systems, achieving centralized online monitoring of the status of each cylinder stage through multi-channel input.

Maintenance and Troubleshooting

Troubleshooting: If the recorder output deviates, check if the load resistance is within 600 Ω. If background interference exists, adjust the cutoff frequency of the 4-stage filter or optimize the Band Start/Duration parameters via software.

Maintenance Recommendations: Regularly use the front panel buffer interface to acquire waveforms and verify the consistency of the physical sensor and monitor ranges. When replacing I/O modules, ensure the Special Inhibit contacts are wired correctly to prevent false alarm suppression.

FAQ

Q: What types of transmitter signal inputs does the 3500/70M 176449-09+135489-01 module support?
A: It receives signals from accelerometers or speed sensors to calculate pulse acceleration and reciprocating speed.

Q: How can I set a “monitoring band” on the 3500/70M 176449-09+135489-01 to avoid background noise?
A: Set Band Start (0–359°) and Band Duration (1–360°) via software for precise crankshaft monitoring.

Q: Does the Buffered Output interface on the 3500/70M 176449-09+135489-01 protect internal circuitry?
A: Yes. Each channel has short-circuit protection with 550 Ω impedance for safe external diagnostics.

Q: How accurate are the recorder outputs on the 3500/70M 176449-09+135489-01?
A: 4–20 mA output resolution is up to 0.3662 µA with ±0.14 mA accuracy across temperature range.

Q: How fast is alarm response on the 3500/70M 176449-09+135489-01 during severe impact?
A: Danger alarms can be set to 0.1 s delay for immediate trip protection.