370300 Accelerometer Transducer
Datasheet

Bently Nevada Machinery Condition Monitoring

115M8762 Rev. CDescription
The Bently Nevada 370300 accelerometers are designed toprovide high electrical isolation between the base of thetransducer and its internal electronics. This isolation offers
greater protection against arcing/electrostatic discharge(ESD), as high as 6,000 volts. The transducer provides anamplitude range of 80 g peak and a sensitivity of 100 mV/g.
Most common machine malfunctions (unbalance,misalignment, etc.) occur on the rotor andoriginate as an increase (or at least a change) inrotor vibration. For any individual casing
measurement to be effective for overall machine
protection, the system must continually transmit asignificant amount of rotor vibration to themachine casing, or mounting location of thetransducer.
In addition, be careful to install the accelerometertransducer on the bearing housing or machine
casing. Improper installation may decrease thetransducer amplitude and frequency response
and/or generate false signals that do not represent
actual vibration. Refer to the appropriate instruction
manuals and Application Notes.
Upon request, Bently Nevada provides engineering
services that can identify the appropriate machine
housing measurements and installation assistanceif needed.

370300 Accelerometer Transducer
Datasheet

115M8762 Rev. C

SpectralSpecifications
Parameters are specified from +20 to +30°C(+68 to +86°F) unless otherwise specified.
Operation outside the specified limits
may result in false readings or loss ofmachine monitoring.

Electrical

10 Hz

10 μg/√Hz (9.8 x 10-5m/sec2/√Hz)

100 Hz

5 μg/√Hz (4.9 x 10-5m/sec2/√Hz)

1000 Hz

5 μg/√Hz (4.9 x 10-5m/sec2/√Hz)Output
Impedance

100 Ω

Sensitivity

10.2 mV/m/s2 (100 mV/g) ±5%,25ºC

Impedance, between connector and baseDC>100 ΩAcceleration
Range

80 g peak (784 m/sec2)

100 Hz>100 MΩ

1.0 kHz>10 MΩ

10 kHz>1 MΩ

Amplitude±1% to 784 m/sec2 (80 g) peak.
Non-linearity
3 - 5kHz(180 - 300,000 CPM)
±5%Power Requirements
Excitation
Voltage+24Vdc nominal
18 ~ 30 Vdc

0.5 - 12kHz(30 - 720,000 CPM)
±3dB

3mA nominal
2 ~ 10 mA

Resonance
Frequency

Regulated
Current
Range

25 kHz (1,500 kCPM)+12VDC nominal

Transverse
Sensitivity,
Max

Output Bias
Voltage5% of axial

GroundingCase isolated, internallyshieldedFrequency
Response

1 - 7k Hz(60 - 420,000 CPM) ±10%Environmental Limits

Temperature -40 to +248° F
Range(-40 to +120° C)

Operating andStorage
Temperature-40°F to +248°F (-40°C to+120°C)

Temperature
Response-40°C -10%+120°C +10%

Electrical Noise

Shock
Survivability

49,050 m/s2 (5000 g) peak,maximum.

Broadband
2. 5 Hz to 25
kHz

Shock Limit,
Mounted2,000 g peak (19,600 m/sec2peak)Dielectricwithstandvoltage
betweenconnector
and surface

6,000 VDC1 min
5,000 VAC1 min

700 μg (6.9 x 10-3 m/sec2)

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370300 Accelerometer Transducer
Datasheet

115M8762 Rev. C

100% condensing, nonsubmerged. Case ishermetically sealed.

Relative
Humidity

Electromagnetic
70 μg/gauss (6.9 x 10-4sensitivity, equivm/sec2/gauss)g, maxPhysical
Weight(no cable)

4.35 oz (122 g)

Diameter

2.54 in (64.4 mm), including
mounting stud.

Height2.3 in (59 mm), including
mounting stud.

Connector

2-pin MIL-5015 Receptacle¼ - 28 UNF

Mounting
Torque,recommended

30in-lb/3.4 N-m

Integral
Mounting

M8 x 1.25

Mounting
Torque,recommended

40in-lb/4.5 N-m

Integral
Mounting

M6 x 1.00

Mounting
Torque,recommended

30in-lb/3.4 N-m

Case Material

303 stainless steel

Mounting
Angle

Any orientation

Sealing

hermetic<0.0002 g/μstrain(<1.9 x 10-3m/sec2/μstrain)

SensingElement Design

PZT, shear

Sensor Case
Material

stainless steel

Isolation
Material

ceramic
16 m (54 ft )Assuming max vibration of
Recommended 80 g, frequency 12 kHz, andCable Length
cable capacitance 200
pF/m. For longer lengths,
contact Bently Nevada TechSupport.

Mounting TorqueIntegral
Mounting

Base Strain
Sensitivity

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Datasheet

115M8762 Rev. C

Compliance andCertifications

Ordering Information

FCC

370300-AA-BB Accelerometer

This device complies with part 15 of theFCC Rules. Operation is subject to thefollowing two conditions:ll

A: Mounting Thread Option

This device may not cause harmfulinterference.
This device must accept any
interference received, includinginterference that may cause
undesired operation.

01

M8 X 1.2502¼-28 UNF

03

M6 x 1.0

B: Agency Approval Option
00

EMC

NoneInterconnect Cables

EMC Directive 2014/30/EU02173034

2- Conductor MIL-C-5015
shielded 0.382mm2 (22AWG)
cable. The cable has a splashproof boot over a female
connector at the transducer
end and is flush cut at themonitor end. The temperature
range of the cable is -55º to 125ºC (-67º to 257ºF). The cable isrecommended for highelectromagnetic noise
environments and European
Conformance (CE). The lengthof this cable is 32ft/10m.

Accessories
115M8763

4/6370300 Accelerometer UserGuide370300 Accelerometer Transducer
Datasheet

115M8762 Rev. C

Graphs and Figures

Figure 1: Acceleration Transducer Dimensional Drawing
Dimensions are in inches

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370300 Accelerometer Transducer
Datasheet

115M8762 Rev. C

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1631 Bently Parkway South, Minden, Nevada USA 89423
Phone: 1.775.782.3611 (US) or Bently.com/support
Bently.com

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