Bently Nevada 330505 Specifications
330505 Low Frequency Velocity Sensor
Datasheet
Bently Nevada Machinery Condition Monitoring
Description
The Bently Nevada 330505 Low Frequency Velocity Sensor is
specifically designed for hydroelectric turbines where slow
rotating speeds require detecting a low signal to noise ratio.
It detects vibration of the stator core, stator frame, and
bearing housing supports. It is designed to provide early
warning of pending machinery problems and to help you
diagnose problems before they become serious.
The sensor measures absolute vibration within the 0.5Hz to
1.0kHz range. Its two-wire design uses moving-coil technology
and embedded signal conditioning circuitry to provide a
voltage output directly proportional to the vibration velocity.
Stator core and stator frame vibration can cause fretting and
damage to the winding insulation. To detect these problems
before serious damage occurs, mount a 330505 sensor on
the outer diameter of the stator core and frame.
169872 Rev. F
Bearing housing vibration can distort levels of vibration
measured by shaft-observing proximity probes. To detect
premature failure of machine components and prevent
significant machine problems, place 330505 sensors in
locations that measure both shaft-relative and bearingabsolute vibration signals. You can mount 330505 sensors to
the bearing housing either as a stand-alone measurement
or in the same orientation as existing proximity sensors.
The 330505 Transducer connects to the 3500/46M Hydro
Monitor, meeting the requirements of International
Organization for Standardization (ISO) Standard 10816-5 for
mechanical vibration on non-rotating parts in hydraulic
power and pumping plants.
Due to the nature of high amplitude, low frequency velocity
events, the 330505 Low Frequency Velocity Sensor is not
recommended for automated machinery protection. Due to
capacitance constraints, this sensor is not approved for
hazardous areas.
330505 Low Frequency Velocity Sensor
Datasheet 169872 Rev. F
Specifications
Parameters are specified from +20 to +30°C
(+68 to +86°F) and 80Hz unless otherwise
indicated.
Operation outside the specified limits
may result in false readings or loss of
machine monitoring.
Electrical
Sensitivity 20 mV/mm/s (508mV/in/s) ±10%
Frequency
Response
Velocity
Range
Amplitude
Range
Amplitude
Linearity
Output Bias
Voltage
Maximum
Cable
Length
Environmental Limits
Operating
and storage
temperature
range
Shock
Survivability
0.5—1000 Hz (30—60,000 cpm)
±3.0 dB;
1—200 Hz (60—12,000 cpm) ±0.9
dB
102 mm/s (4 in/s) peak
See 330505 Vibration
Nomograph on page6.
±3%—102 mm/s (4 in/s) peak
-12 ±1 VDC
305 metres (1000 feet) with no
degradation of signal, when
used with 3500/46M
Maximum mounted surface
temperature
-40°C to +100°C (-40°F to
+212°F)
981 m/s2 (100g) peak
(typical)
Mounting See 330505 System Dimensional
Drawing on page7.
Case
material
Connector 2-pin Mil-C-5015 receptacle,
Mounting
Torque
Polarity Pin A becomes positive with
300 series stainless steel.
hermetically sealed, 300 series
stainless steel.
46 kg cm (40 in-lb) max.
respect to Pin B when the
applied velocity is from the base
to the top of the transducer.
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
Relative
Humidity
To 100% non-submerged; case
is hermetically sealed.
Physical
Weight < 375grams (13.2oz)
RoHS Directive 2011/65/EU
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330505 Low Frequency Velocity Sensor
Datasheet 169872 Rev. F
89411-01 Individual 1/4 - 28 UNF mounting
Ordering Information
For the detailed listing of country and
product specific approvals, refer to the
Approvals Quick Reference Guide
(108M1756) available from Bently.com.
330505-AA-BB-CC
89412-01 Individual 1/4 - 20 UNC mounting
89413-01 Individual 1/4 - 18 NPT mounting
04300015 Individual 5/8 - 18 UNF mounting
adapter
adapter
adapter
adapter.
A: Transducer Mounting Angle
0 1 0° ± 10°
0 2 90° ± 5°
0 3 180° ± 10°
B: Internal Mounting Thread
0 2 3/8-24 UNF-2B
C: Mounting Adapter Option
0 0 No Adapter
0 1 1/2 - 20 UNF
0 2 M8 x 1
0 3 1/4 - 28 UNF
0 4 1/4 - 20 UNC
0 5 1/4 - 18 NPT
0 6 5/8 - 18 UNF
161191 Individual 1/2 - 13 UNC mounting
adapter
Interconnection Cables
The following standard cable lengths are
available. You can order custom cable lengths
in increments of one foot at additional cost.
Some cables have a minimum and maximum
length. For details, see each part description
below.
Standard Cable Lengths
Feet Meters (approximate)
6 ft 1.8 m
8 ft 2.4 m
10 ft 3.0 m
12 ft 3.6 m
15 ft 4.5 m
0 7 3/8 – 16 UNC
Accessories
For more information, please refer to the
330505 Low Frequency Velocity Sensor User
Guide (document 169873).
Part
number
89409-01 Individual 1/2 - 20 UNF mounting
adapter.
89410-01 Individual M8 x 1 mounting
adapter
Description
17 ft 5.0 m
20 ft 6.0 m
25 ft 7.6 m
30 ft 9.0 m
33 ft 10.0 m
50 ft 15.2 m
99 ft 30.0 m
3/12
330505 Low Frequency Velocity Sensor
Datasheet 169872 Rev. F
Cable Part Numbers
Part number Description
† NOTE: Use ‘AA’ in the part numbers below to
specify the length (in feet) of the cable you
want to order.
02173034 Splash-Proof Interconnect
Cable
Recommended for high
electromagnetic noise
environment and European
Conformance (CE).
Shielded 0.382 mm2 (22
AWG) cable with a splash
proof boot over a female
connector at the transducer
end and flush cut at the
monitor end. Temperature
range -55 to 125°C (-67 to
257°F). See Graphs and
Figures.
CB2W100AAA†
Splash-Proof Interconnect
Cable
Shielded 0.382 mm2 (22
AWG) cable with splash proof
over molded boot, blunt cut
at the monitor end.
Temperature range -50 to
200°C (-58 to 392°F). See
Graphs and Figures.
Standard lengths:
Part number Description
9571-AA† Standard Interconnect Cable
Shielded 0.382 mm2 (22
AWG) cable with a moisture
resistant female connector at
the transducer end and ring
lugs at the monitor end.
Temperature range -29 to
121°C (-20 to 250°F). See
Graphs and Figures.
Minimum length 2 ft (0.60 m);
maximum length 99 ft (30 m).
84661-AA† Standard Armored
Interconnect Cable
Stainless steel armor over
shielded 0.382 mm2 (22 AWG)
cable with a moisture
resistant female connector at
the transducer end and ring
lugs at the monitor end.
Temperature range -29 to
121°C (-20 to 250°F). See
Graphs and Figures.
Minimum length 3 ft (0.91 m);
maximum length 96 ft (29 m).
89477-AA† Right Angle Interconnect
Cable
01515 ft (4.5 m)
03232 ft (9.8 m)
06464 ft (19.5 m)
112112 ft (34.1 m)
125125 ft (38.1 m)
150150 ft (45.7 m)
200200 ft (61.09 m)
Shielded 0.963 mm2 (18 AWG)
cable with a moisture
resistant right angle female
connector at the transducer
end and ring lugs at the
monitor end. Temperature
range -29 to 121°C (-20 to
250°F). See Graphs and
Figures.
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