Bently Nevada 190501-CT Specifications
190501 Velomitor CT Transducer
Datasheet
Bently Nevada Machinery Condition Monitoring
Description
The Velomitor CT Velocity Transducer is a low-frequency
version of our standard Velomitor Piezo-velocity Sensor. Its
design specifically measures casing vibration velocity on
cooling tower and air-cooled heat-exchanger fan assemblies
that operate at or above 90 rpm (100 to 300 rpm typical).
The Velomitor CT Transducer can measure vibration
amplitudes at these frequencies as well as the vibration
frequencies generated by the fan motor and speed reducer.
If you are measuring a machine housing to determine
where to install transducers, consider what kinds of
data you need to obtain. Most common machine
malfunctions (imbalance, misalignment, and so forth)
originate at the rotor and cause a change in rotor
vibration. The location you select on the housing must
accurately conduct rotor vibration to the transducer.
Install the transducer carefully. If you don't, the
transducer may not accurately detect vibrations and
can transmit invalid data. Bently Nevada provides
engineering services to accurately measure machine
housings and to install transducers.
141636 Rev. AC
190501 Velomitor CT Transducer
Datasheet 141636 Rev. AC
kHz) Typical Low Frequency Noise
Specifications
Parameters are specified from +20 °C to +30 °C
(+68 °F to +86 °F) and 100 Hz unless otherwise
indicated.
Operating the transducer outside the
specified limits will result in false
readings or loss of machine monitoring.
Base Strain
Sensitivity
Grounding Internal electronics are isolated
Maximum
Cable
Length
Floor on page16.
0.43 mm/s/μstrain (0.017
in/s/μstrain).
from case.
305 metres (1,000 ft.) of cable
(part number 02173006) with
no degradation of signal.
Electrical
Maximum continuous length of cable
Sensitivity 3.94 mV/mm/s (100 mV/in/s)
±5%.
Frequency
Response
3.0 Hz to 900 Hz (180 to 54,000
cpm) ±1.0 dB
available is 91.44 metres (300 ft.) If
longer lengths are required they must
be spliced or have a connector
installed on them.
Temperature
Sensitivity
Velocity
Range
Transverse
Response
Amplitude
Linearity
Mounted
Resonant
Frequency
Output Bias
Voltage
1.5 Hz to 1.0 kHz (90 to 60,000
cpm) ±3.0 dB
-8% to +5% typical over the
operating temperature range.
63.5 mm/s pk (2.5 in/s pk) see
Operating Range for Metric
Units on page14. See Operating
Range for English Units on
page15.. Vibration
components in excess of 10g pk
above 1 kHz can significantly
reduce this range.
Less than 5% of the axial
sensitivity.
±2% to 63.5 mm/s pk (2.5 in/s
pk)
9 kHz, minimum (stud
mounted, except quick
disconnect)
10.1 Vdc ± 1.0 Vdc, Pin A
referenced to Pin B
Environmental Limits
Operating
Temperature
Storage
Temperature
Shock Limit 5000 g pk, maximum.
Humidity
Limit
Magnetic
Field
Susceptibility
-40 °C to +85 °C (-40 °F to +185
°F).
-40 °C to +100 °C (-40 °F to +212
°F).
100% condensing,
non-submerged.
<0.0068 mm/s/gauss (0.268
mil/s/gauss) @ 50 gauss, 5060Hz
Dynamic
Output
Impedance
Broadband
Noise Floor
(1.5 Hz to 1
<400 Ω typical
0.229 mm/s (0.009 in/s) pk.
For more information, see
2/17
190501 Velomitor CT Transducer
Datasheet 141636 Rev. AC
Mechanical
Weight <297 g (10.5 oz.), typical.
Mounting
Surface
Height 82 mm (3.2 in).
Case
Material
Connector 2-pin 316L stainless steel MIL-C-
Mounting
Torque
Polarity Pin A goes positive with respect
Mounting
Angle
For more information on this product,
please refer to the Velomitor CT PiezoVelocity Transducer User Guide (document
125389).
33 mm diameter (1.3 in
diameter).
316L stainless steel
5015, top.
4.5 N-m ± 0.6 N-m (40 in–lbf ± 5
in-lbf).
to Pin B when velocity is from
base to top of the transducer.
Any orientation.
3/17
190501 Velomitor CT Transducer
Datasheet 141636 Rev. AC
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
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)
Intrinsically
Safe
Ex ia IIC T4:
Class I, Div 1, Groups A, B, C, D.
Class II, Group E, F and G
Class III
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)
Intrinsically
Safe and
NonIncendive
330400,
330425
330500 Ex ia IIC T4
330525 Ex ia IIC T4
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
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
Class I, Div 2, Groups A, B, C, D
Install per dwg 167537
T4 @ -40°C ≤ Ta ≤ 100°C
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
4/17
190501 Velomitor CT Transducer
Datasheet 141636 Rev. AC
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
ATEX/IECEx
190501, 330400, 330425, 330500, 330525
190501
Entity
Parameters
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
Ci-10.8nF
Li= 0
330400, 330425,
330500, 330525
Entity
Parameters
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
Ui= 28V Ui= 28V
Ii= 150mA Ii= 150mA
Pi= 0.84W Pi= 1.26W
5/17
190501 Velomitor CT Transducer
Datasheet 141636 Rev. AC
Hazardous Area Conditions of Safe Use
ATEX/IECEx
Zone 0/1:
Equipment must be connected to equipment,
which meets the abovelisted entity parameters.
The cables type A or B (in compliance with EN
60079-25) must respect the cable parameters
listed with the entity parameters.
Zone 2 :
The supply electrical parameters shall not
exceed the values mentioned in the tables
above.
6/17
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