Description

Bently Nevada 330425-01-00 Trendmaster Pro Accelerometer

Configured for casing vibration measurement in the Trendmaster Pro condition monitoring system, the Bently Nevada 330425-01-00 (330425 Trendmaster Pro Accelerometer) provides direct electrical conversion of mechanical acceleration into a calibrated voltage signal for continuous vibration acquisition and analysis.

Suffix Breakdown & Model Matrix

The supplied documentation defines the following ordering structure for the specified model.

Suffix	Specification
330425	Trendmaster Pro single-axis accelerometer
AA = 01	1/4-28 UNF integral stud mounting
BB = 00	Standard single-axis configuration with no additional options

Hardware Specifications

Parameter	Specification
Model	330425-01-00
Brand	Bently Nevada
Origin	USA
Weight	Approximately 99 g
Operating Temp	-54 deg C to +121 deg C
Product Type	Trendmaster Pro Accelerometer
Measurement Axis	Single-axis
Sensitivity	10.2 mV/(m/s^2) (100 mV/g) +/- 12 % at 100 Hz
Frequency Response (+/- 3 dB)	1 Hz to 10000 Hz
Frequency Response (+/- 10 %)	2 Hz to 5000 Hz
Amplitude Linearity	+/- 1 % to 490 m/s^2 (50 g) peak
Measurement Range	490 m/s^2 (50 g) peak
Broadband Noise Floor	0.039 m/s^2 RMS over 10 Hz to 10000 Hz
Electrical Isolation	Greater than 100 Mohm, case to shield
Shock Survivability	49050 m/s^2 (5000 g) peak
Relative Humidity	100 % RH, condensing, non-submerged when properly sealed
Magnetic Sensitivity	Less than 2.0 mm/s^2/gauss at 60 Hz
Housing Material	316L stainless steel
Connector	3-pin MIL-C-5015 top-exit receptacle
Mounting Thread	1/4-28 UNF integral stud
Maximum Mounting Torque	4.1 N m (36 in lb)

Rotor Dynamics Signal Acquisition

Within a Bently Nevada machinery monitoring installation, the accelerometer supplies a calibrated dynamic vibration signal for casing vibration measurement. High-frequency response supports detection of rolling element bearing and gear mesh vibration components while maintaining specified linearity over the rated acceleration range. Proper mechanical mounting, cable shielding, and connector integrity reduce unwanted signal coupling and preserve measurement quality during rotor dynamic analysis.

Frequently Asked Questions

Q: Does the 330425-01-00 measure multiple vibration axes?
A: No. The documented configuration is a standard single-axis accelerometer with the BB = 00 option.

Q: Is the accelerometer electrically isolated from the cable shield?
A: Yes. The specified case-to-shield insulation resistance exceeds 100 Mohm.

Q: Can the sensor operate in condensing humidity environments?
A: Yes, when used with the appropriate sealed boot and cable assembly, it is specified for 100 % relative humidity under condensing, non-submerged conditions.

Field Installation Guidelines

• Install the sensor on a clean, rigid mounting surface using the specified 1/4-28 UNF integral stud.
• Do not exceed the specified mounting torque of 4.1 N m.
• Route the sensor cable separately from high-energy power conductors to minimize electrical interference.
• Maintain connector cleanliness and ensure the 3-pin MIL-C-5015 connector is fully engaged before commissioning.
• Verify cable shield termination according to the system grounding practice used by the Trendmaster Pro monitoring system.
• Inspect the mounting surface for looseness or corrosion during maintenance, as mechanical integrity directly affects vibration measurement accuracy.

Specifications

• Brand: Bently Nevada

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems