330450 High Temperature Acceleration
SystemDatasheet

Bently Nevada Machinery Condition Monitoring

169885 Rev. FDescription
The standard 330400 Accelerometer has a limited
temperature range it can be exposed to, due to its signal
conditioning electronics being located in the same case as
the sensing element. Temperature limitations of theelectronics limit its maximum operating temperature to+100°C (+212°F).
The 330450 High Temperature Acceleration System (HTAS)
has a fundamentally different construction to solve thisproblem. Its design segregates the sensing element from thesignal conditioning electronics, with the two permanently
connected via a hardline cable. Current versions (see notebelow) of these sensors allow the sensing head to bemounted on surfaces with temperatures as high as +400°C(+752°F). Due to the segregated design, the signal
conditioning electronics can be installed in a cooler location.
This achieves overall transducer system performancecomparable to other acceleration transducers, but permits
use at significantly higher temperatures. By eliminating
connections between the sensing head and its associatedsignal conditioning electronics, a significant source ofpotential transducer failures (connector problems) iseliminated.
If housing measurements are being made for overall
protection of the machine, thought should be given to theusefulness of the measurement for each application. Most
common machine malfunctions (imbalance, misalignment,etc.) originate at the rotor and cause an increase (or at leasta change) in rotor vibration. In order for any housing
measurement alone to be effective for overall machine
protection, a significant amount of rotor vibration must be
faithfully transmitted to the bearing housing or machine330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

casing, or more specifically, to the mounting
location of the transducer.
In addition, care should be exercised in thephysical installation of the transducer.
Improper installation can result in adegradation of the transducer’s performance,
and/or the generation of signals which do not
represent actual machine vibration.
Upon request, Bently Nevada can provide
engineering services to determine theappropriateness of housing measurements forthe machine in question and/or to provide
installation assistance.
The previous version limited the sensor
head to +300°C (+572°F). The current versions
will have the letter “G” preceding the serial
number.

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330450 High Temperature Acceleration SystemDatasheet

169885 Rev. F

Environmental Limits

Specifications

Operating and storage temperature range
Maximum mounted surface temperature

Parameters are specified from +20 to +30°C(+68 to +86°F) and 100Hz unless otherwise
indicated.

Sensing Head-55°C to +400°C(-67°F to +752°F)

Integral Hardline -55°C to +400°
Cable(-67°F to +752°F)

Operation outside the specified limits may
result in false readings or loss of machinemonitoring.

ElectricalElectronics-55°C to +100°C(-67°F to +212°F)

ShockSurvivability

24,535 m/s2 (2500 g) peak

Relative
humidity:

To 100% non-submerged; case is hermeticallysealed.

PhysicalSensitivity

10.2 mV/m/s 2 (100 mV/g) ±5%.

Acceleration
Range

785 m/s 2 (80 g) peak overall acceleration within
the 15 to 10000 Hz frequency span.

Weight (typical)

Amplitude
Linearity

2 metres635 grams (1.40 lb)±2% to 785 m/ s 2 (80 g) peak.

4 metres794 grams (1.75 lb)

Broadband Noise
Floor (10 Hz to 15kHz)

6 metres953 grams (2.10 lb)

0.059 m/s2 (0.006 g) rms.

8 metres1111 grams (2.45 lb)

Mounting

See Graphs and Figures on page 8.

Case material

300 series stainless steel.

40 to 4000 Hz(2400 to 240,000 cpm) ±5%

Connector

3-pin Mil-C-5015 receptacle, hermeticallysealed, 304 stainless steel shell.

Transverse
Sensitivity

Less than 5% of axial.

Polarity

Pin A goes positive with respect to Pin C when theapplied force is from the base to the top of thesensing head.

MountedResonant
Frequency

Greater than 15 kHz.

Maximum Cable
Length305 metres (1000 ft) with no degradation ofsignal.

Frequency
Response

15 to 10000 Hz(900 to 600,000 cpm) ±3dB;

Minimum bend radius of 51mm (2.0in)
Bend RadiusPower requirements
Input Voltage-24 ± 0.5 Vdc.

Bias Current

2 mA nominal.

Output BiasVoltage-12 ± 0.5 Vdc.

GroundingCase isolated.

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Please read and understand the 330450
User Guide (document 139976) before
attempting to install and use this product.

330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

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

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

EMC
EMC Directive 2014/30/EU

RoHS
RoHS Directive 2011/65/EU

Maritime
330400 and 330425 only
ABS 2009 Steel Vessels Rules
1-1-4/7.7,4-8-3/1.11.1,4-9-7/13

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330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

ATEX/IECEx

Hazardous Area Approvals

330450, 350900, 330750, 330752

For the detailed listing of country and productspecific approvals, refer to the Approvals Quick
Reference Guide, Document 108M1756, atBently.com.

II 1 GEx ia IIC or IIB Ta, T4 492°C

CSA/NRTL/C

330450, 350900, 330750,330752

Ex ia IIC T4:
AEx ia IIC T4:
Class I, Div 1, Groups A, B, C, D.
Class II, Div 1, Groups E, F, G;
Class III, Div 1

330450

Ta, T1, T4 492°C
Ta, T4, T1 492°C

Install per drawing 168078
T4 @ Ta (-40°C to 100°C)
Enclosure Type 4X
Ex nL IIC T4:
Ex ec IIC T4:
Class I, Zone 2Class II, Div 2, Groups A, B, C and D

Temperature Class

Temperature
Range

Equipment

T4-40°C to +100°C

ElectricalHousing

T1-40°C to +400°C

Sensor andCable

T1-40°C to +482°C

Sensor andCable (3509000

Install per drawing 168078
T4 @ Ta (-40°C to 100°C)
Enclosure Type 4X
Ex ia IIC T4
AEx ia IIC T4
Class I, Zone 0
Class I, Division 1, Groups A, B, C and D;Class II, Division 1, Groups E, F, and G; Class III,Division 1

350900

Entity Parameters for Zone 0/1 and Zone 2Group

When installed with an approved zener barrier per
BN drawing 167923.
T4 @ T4 = 100°C
Ex nL IIC Class 1, Zone 2
Ex ec IIC Class 1, Zone 2Class I, Division 2 (non-incendive),
Groups A, B, C, and D
when installed per BN drawing 168077.
Ex ia IICClass I, Zone 0, AEx ia IIC

330750,330752

II 3 GEx na IIC or IIB Ta, T4, T1
492°C Gc
Ex ec IIC or IIB Ta T4, T1
492°C Gc

Class I, Division 1, Groups A, B, C and D
Class II, Division 1, Groups E, F and G
Class III, Division 1
Ex nL IIC
Ex ec IICClass I, Division 2, Groups A, B, C and D

5/13

IIC

IIB

330450330750330752

Type330450
Type S

330750Type S

330752Type S

Ui

30V

28V

28V

28V

29.2V

Ii

200mA

120mA

120mA

153mA

279mA

Pi

1.5W

1.0W

1.0W

.84W

1.95W

Ci

7 ηF

1 ηF

1 ηF

37 η F37 η F

Li

30 μH

30 μH

30 μH

30 μH

30 μH

350900 350900

330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

Hazardous Area Conditions of Safe
Usel

ATEX/IECExlZone 0/1:
Equipment must be connected to equipment,
which meets the above listed entityparameters.

lThe cables type A or B (in compliance with EN60079-25) must respect the cable parameterslisted with the entity parameters.

lSpecial Notes for 330450, 330750, 330752
and 350900
lllllll

This equipment is intrinsically safe andcan be used in potentially explosiveatmospheres.
This system is intrinsically safe whenconnected to an associated intrinsicallysafe power supply meeting the entity
parameters.
Operating ambient temperature -40°C to+100°C (Electronic Housing)Operating ambient temperature -40°C to+400°C (Sensor and Cable)
Operating ambient temperature -40°C to+482°C (Sensor and Cable for 350900).

Zone 2 :The supply electrical parameters shall not
exceed the values mentioned in the tablesabove.
Special Notes for 330450, 330750, 330752
and 350900
lll

The equipment is safe when connected
to an associated source, containing a
reliable material limiting current andvoltage meeting the entity parameters.
Operating ambient temperature -40°C to+100°C (Electronic Housing)Operating ambient temperature -40°C to+400°C (Sensor and Cable)

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Operating ambient temperature -40°C to+482°C (Sensor and Cable for 350900).
The mating part of the connector shallprovide IP54 ingress protection or better
according to requirements of IEC 60079-0
and IEC 60079-7 or IEC 60079-15.
Provisions shall be made for ensuringthat the rated voltage and current are
not exceeded while in service.
Shall be supplied from Class II limited
energy source according torequirements of C22.2 No 61010-1-12 andUL 61010-1 3rd Edition.
Transient protection shall be provided
that is set at a level not exceeding 140 % of
the peak rated voltage value at thesupply terminals to the equipment.

330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

Ordering Information
For the detailed listing of country and productspecific approvals, refer to the Approvals Quick
Reference Guide, Document 108M1756, atBently.com.

330450-AA
A: Length20

2 metres40

4 metres60

6 metres80

8 metres7/13

330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

Graphs and Figures

Figure 1: 330450 System Dimensional Drawing
Dimensions are in millimeters (inches)

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330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

Figure 2: Acceleration Amplitude

Figure 3: Acceleration Phase Error

9/13330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

Table 1: Interconnection Cables and Accessories
APPLICATIONPARTNUMBERDESCRIPTION†Note: AA - Specifies the length (in feet) of cable requiredStandard Interconnect
Cable

16925AA†

3-conductor shielded 22 AWG (0.5 mm2) cable with 3-socket
plug at one end, terminal lugs at the other end. Minimum lengthof 2.0 ft (0.6 m), maximum length of 99 ft (30 m). See Figure 4Standard ArmoredInterconnect Cable

16710AA†

3-conductor shielded 22 AWG (0.5 mm2) armored cable with 3socket plug at one end, terminal lugs at the other end. Minimum
length of 3.0 ft (0.9 m), maximum length of 99 ft (30 m). SeeFigure 5

Interconnect Cablewith Boot130539AA†

3-conductor shielded 18 AWG (1.0 mm2) cable with 3-socket plugand fluorosilicone elastomer boot at one end, terminal lugs at theother end. Minimum length of 2.0 ft (0.6 m), maximum length of
99 ft (30 m). A manual is available to assist with installation of thiscable (part number 133080-01). See Figure 6Spare MatingConnector

00531080

Electronics Housing
Strap

03818073 1 inch rigid conduit strap for securing the electronics housing.

Electronics Mounting
Hub03818071

Seal Ring

03818072 1 inch sealing lock ring used to mount the electronics housing.
Two rings are required to mount the electronics.

Cable Clamp

169546

Mating connector for 330450 HTAS.

1 inch weather tight hub used to mount the electronics housing ina weatherproof enclosure.

Stainless steel mesh tie down clamp for the hardline cable. For
temperatures greater than 260°C (500°F).

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330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

Standard Lengths
Feet

Metres (approx.)

6

1.8

8

2.4

10

3.0

12

3.6

15

4.5

175.0

20

6.0

25

7.6

30

9.0

33

10.050

15.2

99

30.0

Non-standard/custom
lengths can also beordered at additional
cost.

Figure 4: Standard Interconnect Cable
Standard Lengths
Feet

Metres (approx.)

6

1.8

8

2.4

10

3.0

12

3.6

15

4.5

17

5.0

20

6.0

25

7.6

30

9.0

33

10.0

50

15.2

99

30.0

Non-standard/custom
lengths can also beordered at additional
cost.

Figure 5: Standard Armored Interconnect Cable

11/13

330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

Standard Lengths
FeetMetres (approx.)

6

1.88

2.4

10

3.0

12

3.6

15

4.5

17

5.0

20

6.0

25

7.6

30

9.0

33

10.0

50

15.2

99

30.0

Nonstandard/custom
lengths can also beordered at additional
cost.

Figure 6: Standard Right Angle Interconnect Cable

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330450 High Temperature Acceleration System
Datasheet

169885 Rev. F

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consequential or special damages, claims for lost profits, or third party claims arising from the use of theinformation, whether a claim is asserted in contract, tort, or otherwise. Baker Hughes reserves the right to makechanges in specifications and features shown herein, or discontinue the product described at any time without
notice or obligation. Contact your Baker Hughes representative for the most current information.
The information contained in this document is the property of Baker Hughes and its affiliates; and is subject tochange without prior notice. It is being supplied as a service to our customers and may not be altered or its content
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1631 Bently Parkway South, Minden, Nevada USA 89423
Phone: 1.775.782.3611 or 1.800.227.5514 (US only)
Bently.com

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