Trig-Tek™ 201AP Charge Amplifier User Manual
Contents
1. STRONICS TEST SYSTEMS Trig Tek 201AP Charge Amplifier User Manual Publication No 980996 Rev A MODEL 201AP ACCEL CHARGE AMPLIFIER PVG Astronics Test Systems Inc 4 Goodyear Irvine CA 92618 Tel 800 722 2528 949 859 8999 Fax 949 859 7139 atsinfo astronics com atssales astronics com atshelpdesk astronics com _http Awww astronicstestsystems com Copyright 2012 by Astronics Test Systems Inc Printed in the United States of America All rights reserved This book or parts thereof may not be reproduced in any form without written permission of the publisher THANK YOU FOR PURCHASING THIS ASTRONICS TEST SYSTEMS PRODUCT For this product or any other Astronics Test Systems product that incorporates software drivers you may access our web site to verify and or download the latest driver versions The web address for driver downloads is http www astronicstestsystems com support downloads If you have any questions about software driver downloads or our privacy policy please contact us at atsinfo astronics com WARRANTY STATEMENT All Astronics Test Systems products are designed to exacting standards and manufactured in full compliance to our AS9100 Quality Management System processes This warranty does not apply to defects resulting from any modification s of any product or part without Astronics Test Systems express written consent or misuse of any product or part The warranty also does n2. AE a 1 MO ECT vajad O EE I d itl E EV AA AE E A Y 7 230719 434NS HLIM YAYI OL H3A09 HIVLILO Y YIADI 40 dOL OL 139 BFL NILLIIMIdAL VIVLIV QalsIWadS FISIMBIHLO SSIANN SALON UINHOT 3301NI Av SI Y Nid Figure 2 1 Filter Plug in Assembly Astronics Test Systems Operation 2 2 Publication No 980996 Rev A 201AP User Manual Chapter 3 Performance The following performance test should be run to verify that the unit is performing within the manufacturer s specifications Test Equipment Note Equivalent equipment can be substituted Digital Voltmeter Fluke 8000A Signal Generator Astronics Test Systems 346B Synthesized Calibrator Voltage to Charge Converter Astronics Test Systems 2030 built into the 346B Procedure 6 7 8 9 Connect the 12 to 18 Volts power of approximately 15 milliamps to the unit The 201AP has an internal jumper to select either pC or mV mode When shipped it will be in the pC Mode Connect a sine wave signal of 500 10 mV RMS and about 100 Hz to the input When in the picocoulomb mode connect the input through a voltage to charge converter Turn the GAIN potentiometer all the way clockwise and set the GAIN Switch to 1 11 Connect the AC Voltmeter to the output terminal marked AC The meter common to the terminal marked COM Observe an indication of 500 mV RMS or less Set the GAIN Switch to 0 1 1 1 Observe an indication of 50 mV or less Turn the GAIN
3. AP Charge Amplifier Figure 1 1 is designed to amplify the outputs from piezoelectric or mV type accelerometers force gauges microphones and pressure pickups The CHARGE output from the pickup expressed in millivolts or picocoulombs per g is then amplified and AC signal proportional to the input is brought out via a BNC connector The AC voltage output can be used to operate vibration monitors recorders analyzers etc The unit includes a four section low pass filter The cutoff frequency can be selected by a changing resistor values on a plug in assembly See Figure 2 1 Nominal 3dB cutoff is 20 kHz Cutoff frequencies up to 50 kHz and down to 500 Hz can be accomplished by changing the resistor values on the assembly MODEL 201AP ACCEL CHARGE AMPLIFIER Figure 1 1 Trig Tek 201AP Charge Amplifier Asironics Test Systems Introduction 1 1 201AP User Manual Publication No 980996 Rev A Specifications Input Changed by a movable jumper on the PC PC or mV board S1 location The 201AP is set to PC mode at the factory Frequency 3 dB 1 Hz to 100 kHz no filter Sensitivity 0 1 1 0 1 0 11 mV pC continuously in conjunction with the GAIN switch Pyro Electric Input Shunt Resistance Amplifier will not block Will operate with shunt resistance down to 1 MegOhm mV Mode 3 5 mA current optional Connector 10 32 microdot AC Output Impedance Less than 50 Ohms 10 ma
4. Voltage 5 Volts RMS full scale Frequency Response 15 5 Hz to 50 KHz no filter Amplitude Linearity 0 5 of full scale Harmonic Distortion Less than 1 Connector BNC Power Power 12 to 18 Volts DC at approximately 15 mA Dimensions P 5 25 long x 2 5 wide x 1 66 deep Dimensions 13 3 cm x 6 3 cm x 4 2 cm Introduction 1 2 Astronics Test Systems Publication No 980996 Rev A 201AP User Manual Chapter 2 Operation The Trig Tek 201AP Charge Amplifier provides a low cost unit packaged in a rugged container for mounting close to the accelerometer in the engine test cell or the vibration laboratory It will accept at its input an accelerometer output and provides gain from 0 1 to 1 1 mV pC or 1 to 11 mV pC as selected by the GAIN switch The unit requires 12 to 18 Volts power at approximately 15 milliamps The continuously variable gain adjustment should be set to accommodate the sensitivity of the pickup being used The unit can operate with either picocoulomb or millivolt type pickups GAIN Setting To properly set the gain of the amplifier it is necessary to know the sensitivity of the pickup being used the full scale g range and the mV g required at the output With this information the proper gain can be set Multiply the total full scale g range times the pickup sensitivity This gives the total millivolts or picocoulomb at the input Connect
5. a generator to the input set for the determined level and set the gain for the required output level For instance set the unit to accommodate a 50 pC or mV g pickup and provide a 10 mV g output connect a pC or mV signal from a generator to the input of the Charge Amplifier and set the generator for 1000 pC or mV at 100 Hz Dividing 1000 pC or mV by 50 pC or mV g equals 20 g s peak at the input to the Charge Amplifier Connect a voltmeter to the output of the Charge Amplifier and set the GAIN ADJ of the Charge Amplifier for a 200 mV Peak indication This calibrates the unit for 10 mV g Filter The 201AP has a four section low pass filter to roll off the high frequency end of the pass band The resistors for the filter are on an 8 pin plug in assembly Figure 2 1 The unit is normally set for 3 dB cutoff at approximately 20 kHz Should you want to change the cutoff the four equal resistors on the assembly can be increased to lower the cutoff frequency or decreased to increase the cutoff frequency Astronics Test Systems Operation 2 1 Publication No 980996 Rev A 201AP User Manual El Z60E some IGINNASSY YOLSISIA aone 310114 SSVd MOT pen pe mul u NAAA A ES O mn ME oe on vo sam moudmosan asao 38 aif tmp z e l S o 24 eva va fumavounsnoenes A CO COS CI tet IR poroso va mm A A e E N A ease sarao L ef gt t DSB MS MOE 9 SS MA EEE IN VJ RD BN ad ERA BG VO EE E E A A E POL Tm Be AA E A E E
6. d to the protective third wire earth ground If the instrument fails to operate satisfactorily shows visible damage has been stored under unfavorable conditions has sustained stress Do not operate until performance is checked by qualified personnel Publication No 980996 Rev A 201AP User Manual Table of Contents Chapter science oietdao n 1 1 MEMEO CN OI ata di nen 1 1 Specifications ganien e A A EA A te keh cided 1 2 Ub aaa tada 1 2 AG OUNDULS cise eh RE 1 2 PI ea ties 1 2 DIMENSIONS A Aer res 1 2 Chapter Lae 2 1 OPM a a td 2 1 GAIN Settings dans A di 2 1 Eli A A eR E Fen use delve eee 2 1 Chapter iii di eee 3 1 Performance saks 3 1 TEStHEGUIPMENT usual erindrer guden Greider addere idee eee 3 1 IA Re 3 1 Astronics Test Systems 201AP User Manual This page intentionally left blank Publication No 980996 Rev A Astronics Test Systems Publication No 980996 Rev A 201AP User Manual List of Figures Figure 1 1 Trig Tek 201AP Charge AMplifi8r oooooncninnidnnnccnnnnnnnncccnoncccconncnnornnano cn narcnrn rana nn 1 1 Figure 2 1 Filter Plug in Assembly Astronics Test Systems 201AP User Manual Publication No 980996 Rev A DOCUMENT CHANGE HISTORY Revision Date Description of Change A 12 3 2012 Document Control release Astronics Test Systems Publication No 980996 Rev A 201AP User Manual Chapter 1 Introduction The Trig Tek 201
7. ot apply to fuses software non rechargeable batteries damage from battery leakage or problems arising from normal wear such as mechanical relay life or failure to follow instructions This warranty is in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular use The remedies provided herein are buyer s sole and exclusive remedies For the specific terms of your standard warranty contact Customer Support Please have the following information available to facilitate service 1 Product serial number 2 Product model number 3 Your company and contact information You may contact Customer Support by E Mail atshelodesk astronics com Telephone 1 800 722 3262 USA Fax 1 949 859 7139 USA RETURN OF PRODUCT Authorization is required from Astronics Test Systems before you send us your product or sub assembly for service or calibration Call or contact Customer Support at 1 800 722 3262 or 1 949 859 8999 or via fax at 1 949 859 7139 We can also be reached at atshelodesk astronics com If the original packing material is unavailable ship the product or sub assembly in an ESD shielding bag and use appropriate packing materials to surround and protect the product PROPRIETARY NOTICE This document and the technical data herein disclosed are proprietary to Astronics Test Systems and shall not without express written permission of Astronics Test Sys
8. potentiometer all the way counterclockwise 10 Observe indication of 500 mV or more Asironics Test Systems Calibration 3 1 201AP User Manual Publication No 980996 Rev A 11 Set the GAIN Switch to 1 11 12 Observe an indication of 5 00 Volts RMS or more 13 Change the input frequency to 20 000 Hz 14 Observe an indication of 3 50 volts RMS 1 00 volts RMS on the AC Voltmeter 15 The frequency response of the unit can be checked by changing the frequency in the pass band region and observing the AC output voltage If you go below 30 Hz you have to use a DC coupled oscilloscope because the frequency of the AC meter may deteriorate below 30 Hz It should be 5 down to 5 Hz and the high will be controlled by the cutoff frequency of the low pass filter Calibration 3 2 Astronics Test Systems
9. tems be used in whole or in part to solicit quotations from a competitive source or used for manufacture by anyone other than Astronics Test Systems The information herein has been developed at private expense and may only be used for operation and maintenance reference purposes or for purposes of engineering evaluation and incorporation into technical specifications and other documents which specify procurement of products from Astronics Test Systems TRADEMARKS AND SERVICE MARKS All trademarks and service marks used in this document are the property of their respective owners e Racal Instruments Talon Instruments Trig Tek ActivATE Adapt A Switch N GEN and PAWS are trademarks of Astronics Test Systems in the United States DISCLAIMER Buyer acknowledges and agrees that it is responsible for the operation of the goods purchased and should ensure that they are used properly and in accordance with this document and any other instructions provided by Seller Astronics Test Systems products are not specifically designed manufactured or intended to be used as parts assemblies or components in planning construction maintenance or operation of a nuclear facility or in life support or safety critical applications in which the failure of the Astronics Test Systems product could create a situation where personal injury or death could occur Should Buyer purchase Astronics Test Systems product for such unintended application Buyer shall indemnif
10. y and hold Astronics Test Systems its officers employees subsidiaries affiliates and distributors harmless against all claims arising out of a claim for personal injury or death associated with such unintended use FOR YOUR SAFETY Before undertaking any troubleshooting maintenance or exploratory procedure read carefully the WARNINGS and CAUTION notices RISK OF ELECTRICAL SHOCK human life and safety and is capable of DO NOT OPEN inflicting personal injury h CAUTION This equipment contains voltage hazardous to If this instrument is to be powered from the AC line mains through an autotransformer ensure the common connector is connected to the neutral earth pole of the power supply Before operating the unit ensure the conductor green wire is connected to the ground earth conductor of the power outlet Do not use a two conductor extension cord or a three prong two prong adapter This will defeat the protective feature of the third conductor in the power cord 1 Maintenance and calibration procedures sometimes call for operation of the unit with power applied and protective covers removed Read the procedures and heed warnings to avoid live circuit points SENSITIVE ELECTRONIC DEVICES Do Before operating this instrument 1 Ensure the proper fuse is in place for the power source to operate 2 Ensure all other devices connected to or in proximity to this instrument are properly grounded or connecte
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