330750-60-05 Accelerometer and Cable Assembly
Description:
The part number 330750-60-05 refers to a Seismic Transducer, specifically a 4-20 mA Vibration Transmitter from the Bently Nevada 330500 series or a similar product line. This device is designed for continuous monitoring of casing or structural vibration (velocity) on rotating machinery.
It is an integrated, two-wire loop-powered device that combines a velocity sensor and a signal conditioner into a single, ruggedized package. The transmitter measures the vibration velocity of the surface on which it is mounted and converts it directly into a standardized 4-20 mA analog signal, which is proportional to the vibration level. This signal can be easily sent to a PLC, DCS, indicator, or a monitoring system's 4-20 mA input card for machinery protection and monitoring.
Parameters & Specifications
The following table details the key parameters for this specific configuration based on common Bently Nevada product numbering schemes.
| Parameter | Specification / Interpretation |
|---|---|
| Part Number | 330750-60-05 |
| Device Type | 4-20 mA Vibration Transmitter (Velocity) |
| Measured Parameter | Vibration Velocity |
| Sensitivity / Range | -60- = 0 to 60 mm/s True Peak (0 to 2.36 in/s). This is a very high range for severe vibration applications. |
| Frequency Range | Typically 4.5 Hz to 1000 Hz (Standard for velocity transmitters). |
| Electrical Connection | -05 = Likely a 1/2" NPT conduit entry for connection. |
| Output Signal | Two-wire, 4-20 mA analog output. |
| Power Supply | Typically 12 to 30 VDC loop power (standard for two-wire 4-20 mA devices). |
| Scale Factor | (20 mA - 4 mA) / Range = 16 mA / 60 mm/s ≈ 0.267 mA/(mm/s) |
| Operating Temperature | Typically -40°C to +85°C (-40°F to +185°F) |
| Housing Material | Typically stainless steel. |
| Mounting | Typically a single 1/4"-28 UNF or M10 x 1.5 threaded stud on the base. |
| Typical Dimensions | Approx. 80 mm (H) x 60 mm (Diameter) - can vary by model. |
| Typical Weight | Approx. 0.9 kg (2.0 lbs) |
Important Note: *This part number follows a common Bently Nevada format for their 4-20 mA transmitters. The interpretations above are highly probable but must be verified with the official datasheet from* Baker Hughes *for this exact part number. The high 60 mm/s range is a key characteristic.*
Application Scenarios
This vibration transmitter is designed for continuous, reliable monitoring of overall vibration on industrial equipment where a high vibration range is expected or required. Its simple 4-20 mA output makes it ideal for integration into basic control and monitoring systems.
Casing Vibration Monitoring on Rough Machinery: The high 60 mm/s range makes it suitable for monitoring very rough or high-vibration machinery, such as:
Large Fans and Blowers
Crushers and Mills in mining and mineral processing
Large Pumps handling slurries or abrasive fluids
Reciprocating Compressors
Machine Protection in Severe Duty Applications: Used as a cost-effective protection solution for assets where vibration levels can be very high, and a standard 25 mm/s range transmitter might constantly saturate.
Continuous Monitoring of Auxiliary Equipment in Harsh Environments: Ideal for motors, gearboxes, and other equipment in heavy industries (e.g., mining, pulp & paper, steel) where robustness and a wide measurement range are critical.
Plant-Wide Vibration Monitoring on Low to Medium Criticality Assets: Its rugged design and simple installation make it suitable for deploying across a facility to monitor hundreds of assets that operate at higher vibration levels, providing a basic level of protection.
API 670 Compliance Support: For machinery where the API 670 standard mandates casing vibration monitoring, these transmitters provide a compliant solution, with this particular model being selected for its extended range.
Typical Machinery:
Induced Draft (ID) & Forced Draft (FD) Fans
Ball & SAG Mills
Large Centrifugal Pumps
Reciprocating Compressors
Conveyor Drive Motors and Gearboxes in heavy industry
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