BRUEL & KJAER 4511-W-006 User manual

BN1100 Revision: 0Initial Issue: 21/08/2012
ATA 31-10-04
HUMS Accelerometer
Types 4511-W-006 and 4524-W-001
Abbreviated Component Maintenance Manual
Copyright © 2011, Brüel & Kjær Sound & Vibration Measurement A/S
All rights reserved. No part of this publication may be reproduced or distributed in any form or by any means, without prior
written consent from Brüel & Kjær Sound & Vibration Measurement A/S, Nærum, Denmark
The document reference is online, please check the correspondence between the online documentation and the printed version.

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List of Revisions:
Rev. No. 12345678
Rev. Date
List of Effective Pages:
Page 1 of 18 August 2012 Page 7 of 18 August 2012 Page 13 of 18 August 2012
Page 2 of 18 August 2012 Page 8 of 18 August 2012 Page 14 of 18 August 2012
Page 3 of 18 August 2012 Page 9 of 18 August 2012 Page 15 of 18 August 2012
Page 4 of 18 August 2012 Page 10 of 18 August 2012 Page 16 of 18 August 2012
Page 5 of 18 August 2012 Page 11 of 18 August 2012
Page 6 of 18 August 2012 Page 12 of 18 August 2012
NFL 00–0015C Statement of Conformity
VALIDATION OF OPERATIONS DESCRIBED IN THIS
MANUAL VALIDATION DES OPERATIONS DECRITES DANS CE MANUEL
The maintenance operations described in this manual have
been verified in the manufacturer's workshop by carrying
out exactly, dismantling, reassembly, test and repair
according to the instructions which are detailed in this
document.
The operations are those in use at the latest revision date
of the document.
Les opérations de maintenance décrites dans le présent
manuel ont été vérifiées dans les ateliers du fabricant, par
exécution fidèle des consignes de démontage, remontage,
essais et dépannages, détaillées dans ce document.
Ces opérations sont celles en vigueur à la date de la
dernière révision du document.
The document reference is online, please check the correspondence between the online documentation and the printed version.

BN1100 Revision: 0Initial Issue: 21/08/2012
ATA 31-10-04
Contents
SECTION 1
General Description and Operation................................................................................................. 4
1.1 Purpose...................................................................................................................................................... 4
1.2 Technical Data ........................................................................................................................................... 6
Specification –Type 4511-W-006................................................................................................................6
Specification –Type 4524-W-001............................................................................................................... 8
SECTION 2
Testing............................................................................................................................................. 10
2.1 General .................................................................................................................................................... 10
2.2 Test Conditions .........................................................................................................................................10
2.3 Procedure ................................................................................................................................................ 10
Appearance.............................................................................................................................................. 11
Transducer Sensivity Control................................................................................................................... 11
Electrical Test .......................................................................................................................................... 12
SECTION 3
Disassembly.................................................................................................................................... 13
SECTION 4
Standard and Special Tools........................................................................................................... 14
4.1 Standard Tools......................................................................................................................................... 14
4.2 Special Tools ........................................................................................................................................... 15
4.2.1 References of special tools............................................................................................................. 15
4.2.2 Control of special tools.................................................................................................................... 16
SECTION 5
Consumables.................................................................................................................................. 17
SECTION 6
Cleaning, Storage and Transportation.......................................................................................... 18
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Section 1
General Description and Operation
1.1 Purpose
The accelerometer 4511-W-006 is intended to measure the vibration of the mechanical gearbox for HUMS purposes. It consists of a
piezoelectric element and an electronic charge converter enclosed in a hermetic housing. The output provides a voltage signal
proportional to the acceleration. It is powered by a constant current line drive supply on the same wire as the output signal.
Fig. 1Accelerometer monoaxial 4511-W-006
Fig. 2Dimensions : All dimensions in millimeters
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BN1100 Revision: 0Initial Issue: 21/08/2012
ATA 31-10-04
The accelerometer is intended to measure the vibration of the rotor for HUMS purposes on three axes: X, Y and Z. It consists of a
triaxial piezoelectric element and an electronic charge converter enclosed in a hermetic housing. The output provides a voltage
signal proportional to the acceleration for each axis. It is powered by a constant current line drive supply on the same wire as the
output signal on each axis.
Fig. 3Accelerometer 4524-W-001
Fig. 4Dimensions : All dimensions in millimeters
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1.2 Technical Data
1.2.1 Specification –Type 4511-W-006 –Monoaxial
General Characteristics
Accelerometer Type IEPE – monoaxial
Voltage Sensitivity (at 159.2 Hz) 10 mV/g
Sensitivity Tolerance ±5% on the whole frequency range
Measuring Range ±500 g pk
Output Full Scale Voltage ±5 V
Frequency Response ±5% from 2Hz to 25 kHz
Resonance Frequency 43 kHz
Precision (Residual Noise):
10 Hz
100 Hz
1kHz
0.01 gmax
1.6e-3 Hzms 2
5.0e-4 Hzms 2
1.6e-4 Hzms 2
Linearity ±1%
Transverse Sensitivity 5% max.
Temperature Response –10% +15% max. from –51°C to +150°C (referring to sensitivity at
20°C)
Measurement Axis Perpendicular to the mounting surface
Protection Against Crossed polarity and short circuit
Electrical Characteristics
Output Impedance 2Ω max
DC Output Bias Voltage 12 Vdc ±1 Vdc at room temperature and 4 mA
12 Vdc +1 –2 for whole temperature and current range
Supply Current +2 mA (min.) to +10 mA (max.)
Supply Voltage +23 Vdc to +32 Vdc
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BN1100 Revision: 0Initial Issue: 21/08/2012
ATA 31-10-04
Insulation Resistance >100 MΩ
Dielectric Strength 500 Vdc
Signal Ground Isolated from housing
Connection Through a bifilar cable (double-shielded recommended)
Single-shielded possible if connected to structure in both ends
Environmental Characteristics
Temperature Normal Operational Range –51°C to +150°C
Temperature Survival Range –55°C to +150°C
Max. Operating Sinusoidal Vibration 500 g
Max. Shock Level (peak)
(Max. Non-destructive Shock (peak))
±5000 gpk (half sine, 1ms)
Humidity Hermetically sealed
Physical Characteristics
Dimensions See outline drawings in Fig. 2
Weight <35 gram
Case Material Stainless steel AISI 316–LS
Connector GLENAIR type 8070-1072Z15-3CN
Mounting Centre bolt
Mounting Screw (optional accessory) DIN 912 M4×18 (with safety wire hole)
According to SPX902A0002A01
Environmental Constraints
According to DO160E
Marking Supplier Name, NATO code, p/n, S/N, Date and Measurement axis (1)
Calibration chart
Acceptance test summary report
Included Deliverables
Certificate of conformance
All values are typical at 25°C unless measurement uncertainty is specified.
The document reference is online, please check the correspondence between the online documentation and the printed version.

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1.2.2 Specification –Type 4524-W-001 - Triaxial
General Characteristics
Accelerometer Type IEPE –triaxial
Voltage Sensitivity (at 159.2 Hz) 100 mV/g
Sensitivity Tolerance ±5% on the whole frequency range
Measuring Range ±50 g pk
Output Full Scale Voltage ±5 V
Amplitude Response ±5% from 2Hz to 2kHz
Phase Response ±5° from 2Hz to 2kHz
Resonance Frequency >18 kHz
Precision (Residual Noise) 0.3 g max.
Linearity ±1%
Transverse Sensitivity 5% max
Temperature Response ±10% max from –45°C to +125°C
(referring to sensitivity at 20°C)
Measuring Axes z-axis perpendicular to the mounting surface
x-,y-,z- right-hand coordinates
Protection Against Crossed polarity and short circuit
Electrical Characteristics
Output Impedance 2Ωmax.
DC Output Bias Voltage 12 Vdc ± 1 Vdc for whole temperature range
Supply Current +2 mA (min.) to +10 mA (max.)
Supply Voltage +23 Vdc to +32 Vdc
Insulation Resistance >100 MΩ
The document reference is online, please check the correspondence between the online documentation and the printed version.

BN1100 Revision: 0Initial Issue: 21/08/2012
ATA 31-10-04
Dielectric Strength 500 Vdc
Signal Ground Isolated from housing
Connection Through a quadrifilar cable
(Double-shielded recommended. Single-shielded possible if connected
to structure in both ends.)
Environmental Characteristics
Temperature Normal Operational Range –45°C to +125°C
Max operating sinusoidal vibration 50 g pk
Max. Shock Level (peak)
Max. Non-destructive Shock (peak)
5000 gpk (half sine, 1ms)
Humidity Hermetically sealed
Physical Characteristics
Dimensions See outline drawings in Fig. 4
Weight <50 gram
Case Material Stainless steel AISI 316-LS
Connector GLENAIR type 8070-1072Z16-4CN
Mounting 3 holes in isosceles triangle position
Mounting Accessories
(optional)
3 × DIN 912 A2 M4 × 12 screw
3 × DIN 433 A2 M4 washer
According to SPX902A0002A01
Environmental Constraints
According to DO160E
Marking Supplier Name, NATO code, p/n, S/N, Date and Measurement axis (3)
Calibration chart
Included Deliverables
Acceptance test summary report
All values are typical at 25°C unless measurement uncertainty is specified.
The document reference is online, please check the correspondence between the online documentation and the printed version.

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Section 2
Testing
2.1 General
•In addition to the standard tool kit, special tools will be necessary for some operations. These tools will besupplied by the
manufacturer
•Tools and special tools supplied by the manufacturer are illustrated and listed under “Standard and Special Tools”.
2.2 Test Conditions
Ambient temperature:25°C ±5°C
2.3 Procedure
2.3.1 Appearance
1) Check labelling.
2) Check overall dimensions.
3) Check electrical connections.
Note:
•For Type 4511-W-006, see Fig. 2for specification of overall dimensions
•For Type 4524-W-001, see Fig. 4for specification of overall dimensions
2.3.2 Transducer Sensitivity Control
The transducer must be calibrated at a temperature around 25°C ±5°C.
This calibration operation will not only test the transducer, but also the measurement chain “transducer-cable-DMAU”.
Control process:
1) Dismount the transducer from its bracket. Do not disconnect the electrical cable.
2) Using Calibration Exciter Type 4294, mount the transducer with a “finger-tight” mounting torque (max. 0.5 Nm) directly onto
the calibrator’s vibration table as shown in Fig. 5.
For 4511 W006, use the mounting adaptor WA-1740
For the 4524W001, use the mounting adaptor WA-1732
The document reference is online, please check the correspondence between the online documentation and the printed version.