Bently Nevada 330500 Specifications
330500 Velomitor Piezo-velocity Sensor
Datasheet
Bently Nevada Machinery Condition Monitoring
Description
Bently Nevada Velomitor Piezo-velocity Sensors are designed
to measure absolute (relative to free space) bearing housing,
casing, or structural vibration. The 330500 is a specialized
piezoelectric accelerometer that incorporates embedded
integrated electronics in a solid-state design.
Because the 330500 incorporates solid-state electronics and
has no moving parts, it does not suffer from mechanical
degradation and wear, and can be mounted vertically,
horizontally, or at any other angle of orientation
Measuring Housings for Transducer
Placement
If you are measuring a machine housing to determine where
to place transducers, consider the types of measurements
you want to obtain. Most common machine malfunctions
like imbalance or misalignment originate at the rotor and
cause a change—usually an increase—in rotor vibration.
141632 Rev. P
If you integrate the 330500 Velomitor output to
measure displacement, electrical noise from
interference and the transducer circuit can be
amplified. The noise can degrade performance of
330500 transducers and produce inaccurate
displacement data.
To obtain high quality data, place the transducer in a
location where it can best detect machine vibration through
the bearing housing or machine casing. Choose a location,
grounding, and shielding that maximizes amplitude and
frequency response and lessens data that doesn’t represent
actual machine vibration.
Bently Nevada provides engineering services to determine the
optimum location to install transducers. For assistance, visit
Bently.com.
330500 Velomitor Piezo-velocity Sensor
Datasheet 141632 Rev. P
Specifications
Parameters are specified from +20 °C to +30 °C
(+68 °F to +86 °F) and at 100 Hz unless otherwise
indicated.
Operating the transducer outside the
specified limits may result in false
readings or loss of machine monitoring.
Electrical
Sensitivity
Frequency
Response
Temperature
Sensitivity
Velocity Range 1270 mm/s (50 in/s) peak.
Transverse
Sensitivity
Amplitude
Linearity
Mounted
Resonant
Frequency
Output Bias
Voltage
Dynamic Output
Impedance
Broadband Noise
Floor (4.5 Hz to 5
kHz)
Grounding Case isolated
Maximum Cable
Length
3.94mV/mm/s (100 mV/in/s)
±5%.
4.5 Hz to 5 kHz (270 cpm to 300
kcpm) ±3.0 dB.
6.0 Hz to 2.5 kHz (360 cpm to 150
kcpm) ±0.9 dB.
-14% to +7.5% typical over the
operating temperature range.
Less than 5% of sensitivity.
±2% to 152 mm/s (6 in/s) peak.
Greater than 12 kHz.
-12 ±3.0 VDC, over temperature
referenced to Pin A.
Less than 2400 Ω
0.004 mm/s (160 μin/s) rms,
nominal
305 metres (1,000 feet) of cable,
part number 02173006, with no
degradation of signal.
Base Strain
Sensitivity
Magnetic Field
Susceptibility
0.005 in/s/µstrain.
<51 µin/s/gauss (50 gauss, 50-
60Hz).
Physical
Weight 142 grams (5.0 oz), typical.
Diameter 25.3 mm (0.995 in).
Height 63.2 mm (2.49 in).
Case Material 316L stainless steel.
Connector
Mounting Torque 32-46 kg cm (24-40 in-lb) max.
Polarity
2-pin Mil-C-5015 hermeticallysealed, 316L stainless steel shell.
When the sensor case motion is
toward the connector, Pin A
becomes positive with respect to
pin B.
Environmental Limits
Operating
Temperature
Range
Shock Survivability 5,000 g peak, maximum
Relative Humidity
-55°C to 121°C
(-67°F to 250°F)
To 100% non-submerged; case
is hermetically-sealed.
2/11
330500 Velomitor Piezo-velocity Sensor
Datasheet 141632 Rev. P
Compliance and
Certifications
FCC
This device complies with part 15 of the
FCC Rules. Operation is subject to the
following two conditions:
l This device may not cause harmful
interference.
l This device must accept any
interference received, including
interference that may cause
undesired operation.
EMC
EMC Directive 2014/30/EU
RoHS
RoHS Directive 2011/65/EU
Maritime
330400and 330425 only
ABS 2009 Steel Vessels Rules
1-1-4/7.7,4-8-3/1.11.1,4-9-7/13
3/11
330500 Velomitor Piezo-velocity Sensor
Datasheet 141632 Rev. P
Class I, Div 2, Groups A, B, C, D
Install per dwg 167537
Hazardous Area
Approvals
For the detailed listing of country and product
specific approvals, refer to the Approvals Quick
Reference Guide (108M1756) available from
Bently.com.
CSA/NRTL/C
190501 (Agency Approval Options 01 through 04)
Ex ia IIC T4:
Class I, Div 1, Groups A, B, C, D.
Class II, Group E, F and G
Class III
Intrinsically
Safe
Intrinsically
Safe and
NonIncendive
330400,
330425
330500
AEx ia IIC T4:
Class I, Div 1, Groups A, B, C, D;
Class II, Groups E, F, G
Class III
Install per drawing 167536
T4 @ -40 °C ≤ Ta ≤ +100 °C
(-40 °F ≤ Ta ≤ +212 °F)
Ex nL IIC T4
Class I, Division 2, Groups A, B, C and D
AEx nA T4
Class I, Division 2, Groups A, B, C and D
Install per drawing 167536
T4 @ -40 °C ≤ Ta ≤ +100 °C
(-40 °F ≤ Ta ≤ +212 °F)
Ex ia IIC T4
AEx ia IIC T4
Class I, Div 1 Groups A, B, C and D
Class II, Groups E, F, and G
Class III
T4 @ -40°C ≤ Ta ≤ 100°C
Install per dwg 167538
Ex ia IIC T4
AEx ia IIC T4
Class I, Division 1, Groups A, B, C and D
Class II, Groups E, F, G
Class III
Install per dwg 167537
T4 @ -40°C ≤ Ta ≤ 100°C
Ex nL IIC T4
AEx nA IIC T4
330525
ATEX/IECEx
190501, 330400, 330425, 330500,
330525
190501
Entity Parameters
330400,
330425,
330500,
330525
Entity Parameters
T4 @ -40°C ≤ Ta ≤ 100°C
Ex ia IIC T4
AEx ia IIC T4
Class I, Division 1, Groups A, B, C and D
Class II, Groups E, F, G
Class III
T4 @ -40°C ≤ Ta ≤ 100°C
Ex nL IIC T4
AEx nA IIC T4
Class I, Div 2, Groups A, B, C, D
Install per dwg 167539
T4 @ -40°C ≤ Ta ≤ 100°C
II 1 G
Ex ia IIC T4 Ga
II 3 D
Ex na IIC T4 Gc
Ex tc III T130°C Dc
T4@ Ta = -55°C to 121°C
Zone 0/1 Zone 2
Ui= 30V Ui= 30V
Ii= 200mA Ii= 200mA
Pi= 0.75W Pi= 1.14W
Ci-27.2nF
Li= 0
II 1 G
Ex ia IIC T4 Ga
II 3 D
Ex na IIC T4 Gc
Ex tc III T130°C Dc
T4@ Ta = -55°C to 121°C
Zone 0/1 Zone 2
4/11
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