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Related Manuals for BRUEL & KJAER 2663
Summary of Contents for BRUEL & KJAER 2663
- Page 1 Technical Documentation Preamplifiers Types 2663 and 2663-B English BE 1068 – 12...
- Page 2 Preamplifiers Types 2663 and 2663 B User Manual BE 1068 – 12...
- Page 4 Preamplifiers Types 2663 and 2663 B Revision April 2003 Brüel & Kjær Preamplifiers Types 2663 and 2663 B BE 1068 – 12 User Manual...
- Page 5 All rights reserved. No part of this publication may be reproduced or distributed in any form or by any means without prior consent in writing from Brüel & Kjær Sound & Vibration Meas- urement A/S, Nærum, Denmark. Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual...
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Page 6: Table Of Contents
Contents 1. Introduction ........................... 1 About this Manual ......................2 Preamplifiers Types 2663 and 2663 B................2 Uses and Features ......................2 Description ........................3 2. Operation ..........................5 Environment ........................6 Mounting .......................... 6 Accelerometer Input Connection ..................7 Single-ended Connections .................. - Page 7 Output Connector ..................... 32 Measuring and Recording Instrumentation ..............33 5. Specifications ........................35 Specifications ........................36 6. Service and Repair ......................37 Service ..........................38 Repair ..........................38 A. Appendix – Ground Loop Noise ................. 39 Ground Loop Phenomena....................40 Index ............................
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Page 8: Introduction
Chapter 1 Introduction BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual... -
Page 9: About This Manual
About this Manual About this Manual This user manual is an overall guide to Types 2663 and 2663 B preamplifier hardware, including hardware descriptions, operating instructions and characteristics, specifica- tions, as well as service and repair. It is advisable to read this manual before operat- ing the preamplifier to ensure proper usage and measurement. -
Page 10: Description
Type 2663 has a preadjusted frequen- cy range of 0.5 Hz (–3 dB) to 33 kHz (–3 dB) whereas Type 2663 B has a frequency range of 0.5 Hz (–3 dB) to 100 Hz (–6 dB). - Page 11 The high frequency cut-off is determined by a 2-pole Butterworth low-pass filter pre- adjusted to 33 kHz (–3 dB) for Type 2663; 100 Hz (–6 dB) for Type 2663 B. The cut-off frequency may be adjusted between 250 Hz and 33 kHz, and with reduced specifica- tions to 200 kHz.
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Page 12: Operation
Chapter 2 Operation BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual... -
Page 13: Environment
They also contain an M 3 Metric Insert for grounding. Fig.2.1 Mounting of Preamplifier Types 2663 and 2663 B Ensure the preamplifiers are firmly fastened, where possible, on a vibration-free sur- face, and that connection cables are properly anchored. The preamplifiers can with- stand shock levels up to 100 g (6.5 ms) and meet the vibration requirements of MIL –... -
Page 14: Accelerometer Input Connection
Chapter 2 — Operation Accelerometer Input Connection Accelerometer Input Connection The input connector of Preamplifiers Types 2663 and 2663 B is a two-pole TNC sock- et, which can be used with three input configurations: Single-ended floating ● Single-ended grounded ●... - Page 15 Vibration Test Specimen 890748e Fig.2.3 A section of Type 2663/2663 B’s circuit board is shown with the side-cover removed. The Floating-Remove Jumper allows you to choose between a grounded or floating connection For a Single-ended Floating configuration, remove the connection (jumper) between the two pins on the stand.
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Page 16: Differential Connection
2.3.2 Differential Connection This section deals with the connection of Type 2663 or Type 2663 B to differential types of accelerometer which have both poles of their piezoelectric element isolated from their housing. The floating differential input of the preamplifier eliminates trans- ducer ground loop problems. -
Page 17: Output And Supply Connections
Chapter 2 — Operation Output and Supply Connections Fig.2.5 Connection of differential accelerometer to Type 2663/2663 B using double-screened, two- core, low-noise, accelerometer cable Differential Accelerometer grounded by Input vibration test specimen Preamplifier 2663 Vibration Test Specimen 890749e Since the shield of the accelerometer output socket is part of the accelerometer... -
Page 18: Output Signal - Pins A And B
Power is provided to pins E and F by a dual-polarity DC supply with voltage between ±20V and ±32V (see Fig.2.7), or by a single-polarity DC supply, between pins C and E with voltage between +20 V and +32 V (see Fig.2.8). BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual... - Page 19 Chapter 2 — Operation Output and Supply Connections Fig.2.7 Dual-polarity DC supply, signal-input and -output connections with Types 2663/2663 B ±20V to ±32V Signal Ground Chassis only Dual Polarity AC Output DC Supply DC Output mains Ground (max. 30mA) Signal Ground...
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Page 20: Circuit Adjustment For Acceleration Measurement
The basic formulae necessary for calculation of the resistor values required for particular parameter values are printed on the shield. Standard, metal film resistors should be used. Fig.2.9 Type 2663/2663 B with side-cover removed The following parameters are adjustable: Low frequency cut-off ●... -
Page 21: Low Frequency Cut-Off Adjustment
250 Hz and 33 kHz, and with reduced specifications to 200 kHz. The formula for the low-pass frequency, as printed on the circuit shield, is as follows: 1.59 ------------------------- - Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual... -
Page 22: Output Bias Adjustment
The sensitivity, or gain, is preadjusted to 1 mV/pC and can be adjusted between 1 and 100 mV/pC. The formula printed on the circuit shield is as follows: 1.69 Gain ------------------------- - -------- - BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual... -
Page 23: Grounded/Floating
Fig.2.10 Grounded/Floating connection shown with (left) Floating and (right) Grounded input config- uration This has already been discussed in section 2.3.1 and is used when choosing between single-ended grounded and single-ended floating input connections. Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual... -
Page 24: Circuit Adjustment For Velocity Measurement
The purpose of this section is to explain how to change the filter stages of the preamplifier to integrate the signal. Fig.2.11 Preset frequency response Types 2663/2663 B 10 dB 0 dB... -
Page 25: Changing The Low-Pass Filter
Fig.2.13. The value of resistor is determined by and is obtained from the formula printed on the preamplifier shield: 1.59 ------------------------- - Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual... -
Page 26: Changing The High-Pass Filter
The value of resistor frequency of the filter and is determined by the following formula: -------------------------------- - 2 Select a value for = 10 Hz. BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual... -
Page 27: Velocity Sensitivity
If the deviation is too large, the resistor values can be changed slightly; alternatively the value of can be changed and the resistor values recalculated. Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual... - Page 28 20 dB Ideal 30 dB 40 dB 1 Hz 2 Hz 5 Hz 10 Hz 20 Hz 50 Hz 100 Hz 200 Hz 500 Hz 1 kHz 892067/1e BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual...
- Page 29 Chapter 2 — Operation Circuit Adjustment for Velocity Measurement Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual...
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Page 30: Operating Characteristics
Chapter 3 Operating Characteristics BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual... -
Page 31: Lower Limiting Frequency
0.5 Hz (–3 dB). Two poles of the filter can be adjusted to give a cut-off frequency from 0.5 Hz to 1 kHz. Fig.3.1 Lower limiting frequency response of Types 2663/2663 B for different values of F 10 dB 0 dB... -
Page 32: Upper Limiting Frequency
Chapter 3 — Operating Characteristics Upper Limiting Frequency Fig.3.2 Lower limiting frequency response of Type 2663 with input resistances of 2 M , 4 M as well as the normal value (>10M ). Changing the lower limiting frequency of the preamplifiers to ... - Page 33 33 kHz. Fig.3.5 High frequency response of Type 2663 using different resistor values to change the cut-off frequency 1 dB 1.58 kΩ 0 dB...
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Page 34: Sensitivity
Chapter 3 — Operating Characteristics Sensitivity Fig.3.6 Frequency response of Type 2663 for different gain settings when operating beyond 33 kHz 1 mV/pC 0 dB 1 dB 10 mV/pC 2 dB 3 dB 50 mV/pC 4 dB 6 dB 8 dB... -
Page 35: Phase Response
The typical phase response of the the preamplifiers for the preset frequency range (0.5 Hz to 33 kHz) is shown in Fig.3.8. Note that changing the upper or lower limiting- frequency will alter the phase characteristics accordingly. Fig.3.8 Phase response of Type 2663 with 2 nF input load -100 -120 -140... -
Page 36: Output Noise And Dynamic Range
Fig.3.9 Third-octave noise spectrum produced by Types 2663 when powered from a ±28 V dual- polarity supply. The measurement was made using a Brüel & Kjaer Dual Channel Real-time Frequency Analyzer Type 2133 With higher values of input source capacitance, the output noise level increases, as shown in Fig.3.10. - Page 37 10 -3 pC 100 pC 1 mV / pC 100 mV / pC 50 pC 20 pC 10 pC Input Source Capacitance nF Accelerometer Cable (90 pF/m) length (m) 893290/1e Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual...
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Page 38: Accessories
Chapter 4 Accessories BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual... -
Page 39: Cables And Plugs
Fig.4.1 Front view of Adaptor Type JJ 0207 Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual... -
Page 40: Differential Input
Fig.4.2 Cable Connector set UA 0186 4.1.2 Differential input For connection of differential types of vibration transducer to Types 2663/2663 B, four types of screened, two-core cable are available on special order. These are shown in Table 4.2 and can be obtained with plugs already fitted. -
Page 41: Output Connector
4.6. Fig.4.5 6-pin Plug Type JJ 0615 output connector with solder connections supplied with Types 2663. Type 2663 B is supplied with Crimp Connector Type JJ 0624 Preamplifiers Types 2663 and 2663 B Brüel &... -
Page 42: Measuring And Recording Instrumentation
Measuring and Recording Instrumentation Brüel & Kjær supply a wide range of piezoelectric transducers, which are measuring and recording instrumentation that may be used with Types 2663 and 2663 B. For detailed information on equipment specifications, consult Brüel & Kjær directly or go www.bksv.com... - Page 43 Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual...
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Page 44: Specifications
Chapter 5 Specifications BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual... -
Page 45: Specifications
DISTORTION Type 2663: Type 2663: < 0.1%, 3 Hz – 3 kHz; < 0.3%, 0.5 Hz – 33 kHz 4-pole Butterworth preadjusted to 0.5 Hz (–3 dB) (3 Hz ±5%, re 160 Hz), Type 2663 B: <0.4%, at 80 Hz 2 poles adjustable to give cut-off frequency between 0.5 Hz and 1 kHz... -
Page 46: Service And Repair
Chapter 6 Service and Repair BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual... -
Page 47: Service
Service Service The design and construction of Preamplifier Types 2663 and 2663 B ensure that they will maintain their specification and operate satisfactorily for many years. If a fault does occur, which affects the operation or the safety of the preamplifiers, then dis- connect the power supply to prevent the risk of further damage. - Page 48 Appendix A Ground Loop Noise BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual...
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Page 49: Appendix - Ground Loop Noise
(see Fig.2.3 section 2.3.1); alterna- tively Switch should be opened. Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual... -
Page 50: Index
Index BE 1068 – 12 Preamplifiers Type 2663 and 2663 B User Manual... - Page 51 Low frequency Cut-off Adjustment ....... 14 error voltage ..............40 Extension Connector Type JJ 0032 .......30 mass ..................6 measured frequency response ....... 20 factory preset ..............25 Measured frequency response curves ....20 Preamplifiers Types 2663 and 2663 B Brüel & Kjær User Manual...
- Page 52 Velocity Measurement ..........16 radiation pickup Velocity Sensitivity ............11 ............20 ready-made cables ............10 Recording Instrumentation ........33 Repair ................. 38 www.bksv.com ............... 33 resistance ................. 18 BE 1068 – 12 Preamplifiers Types 2663 and 2663 B User Manual...
- Page 54 HEADQUARTERS: DK-2850 Nærum · Denmark · Telephone: +45 4580 0500 · Fax: +45 4580 1405 · www.bksv.com · info@bksv.com Australia (+61) 2 9889-8888 · Austria (+43) 1 865 74 00 · Brazil (+55)11 5188-8161 · Canada (+1) 514 695-8225 China (+86) 10 680 29906 · Czech Republic (+420) 2 6702 1100 · Finland (+358) 9-755 950 · France (+33) 1 69 90 71 00 Germany (+49) 421 17 87 0 ·...
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