6084-084-DM2 1GS/s Digitizer and 6.5
Contents
1. Publication No 981000 Rev A 620C User Manual Sensitivity Switch Sensitivity Thumb Switch Selects 0 1 1 2 1 12 or 10 120 multiplier for the sensitivity thumb switch Four decade thumb switch sets the acceleration gain to accommodate the particular pickup being used Switch covers 1 to 12 range and works in conjunction with the sensitivity multiplier switch to cover the range of 0 1 120 pC g SE ISO DIFF Switch RP Provides isolated or single ended operation for pC SE for pC g and DIFF for differential pickups SINE RANDOM Burst Switch Selects RMS units at the input when in the RANDOM position and PEAK units when in the SINE position OVERTEST dB Set Thumb A six position switch to set 1 2 3 4 5 or 6 Switch dB and 0 is OFF UNDERTEST dB Set Thumb A six position switch to set 1 2 3 4 5 or 6 Switch dB and 0 is OFF If ON it will initiate when the 1dB point is passed TEST LEVEL Set Thumb Pot Used in conjunction with the ACCEL g s Switch Calibrated from 1 to 12 ACCEL g s Switch Selects 1 1 99 1 19 9 or 10 199 as the switch multiplier for the TEST LEVEL set thumb pot OPER Operate BYPASS OPER position is for normal operation The BYPASS position connects the compressor input to the compressor output jack RESET START Switch When mometarily pressed the RESET switch resets any fault condition if the original Fault is removed and sets2. 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 connected 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 981000 Rev A 620C User Manual Table of Contents Chapter discuss aia aida 1 1 Fr de 0 Lule do EE EN 1 1 Deseripion rss Sa v ha saat haa cae dca Sa sec gta saad ha alenaiie eda ade Sas eave gta saad badet 1 1 Specification Doo seder Seen 1 2 O EEE PA EE A OE AE humane u r 1 2 Ref Frequency Mputa eaea a a rea e 1 2 Compressor Input svare sendes dd lina dd deta 1 3 Compressor Output cassie sees ate a a a aaa aa aa aa aan thie 1 3 Ae IKONENE PARAE T EA E tt ts oa 1 3 Velocity Outputs sic ia 1 3 DisplacementOllpUtiuiinn A nestle are ened 1 4 Toma Sii hited eee den sales tie site eden Melee aac ln adn de ae 1 4 COMO Senor aora o io AT 1 4 O 1 5 Dimensions arabe nakne ee boas 1 6 Power Requirement inssrndpedissjvrdeva i feddumedeidad rad edndidrnusfidkt sd 1 6 GR pler Liu lia diia 2 1 Operations area sata nen 2 1 Start Up Procedure oi os 2 2 Initial Instrument Sete sisi aa taba 2 2 SING MOd6 anne ee ke ai Ai 2 2 Random Mode wc rd Ska
3. 10 00 Set the generator frequency to 140 Hz and the level to 707 5 millivolts RMS 13 14 15 Observe an indication of O 0 25 dB on the DEVIATION meter Change the generator level to 1 41 V RMS Observe an indication of 6dB 0 25 dB on the DEVIATION meter Performance Test 3 2 Astronics Test Systems Publication No 981000 Rev A 620C User Manual Chapter 4 Calibration Procedure The 620C Article Protector s circuitry is packaged on a single circuit board The adjustments are all accessible from the top when the instrument cover is removed The locations of the various adjustments are marked on the PC board The following procedure provides the method to make the adjustments Test Equipment Note Equivalent equipment can be used Function Generator Trig Tek 45EMD Calibrator Voltage to Charge Converter Trig Tek 2030 AC DC Digital Voltmeter Keithley 191 Instrument Setup Remove the top cover of the unit and connect the power cord to AC power between 90 and 230 Volts RMS Switch Settings Note Refer to Figures 1 2 and 1 3 for switch and connector locations Refer to Figures 4 1 and 4 2 for variable resistor locations on the main motherboard and A3 daughter board Place these switches in the following settings e mV pC g switch to 1 12 e SENSITIVITY switch to 10 00 e ACCEL g s switch to 10 120 e SET LEVEL switch to 100 0 e SE ISO DIFF switch rear panel to ISO e PC mV CURR switch real panel to PC e SIN
4. 2 620C Rear View Specifications Accel Input Level pC accel 0 1 pC g to 120 pC g mV accel 0 1 mV g to 120 mV g Frequency Range 2 Hz to 10 kHz Impedance PC accel Greater than 10 meg Ohms mV accel Greater than 100 k Ohms Constant current source for accelerometers with built in charge converter with ON OFF switch Differential Greater than 10 meg Ohms Connectors Microdot and BNC for pC and mV and three pin for differential accelerometers Ref Frequency Input Level 0 1 to 20 V RMS Impedance Greater than 250 k Ohms Frequency Range 2 Hz to 10 kHz Wave Form Any recurring waveform Connector BNC isolated Introduction 1 2 Astronics Test Systems Publication No 981000 Rev A Compressor Input 620C User Manual Level 0 to 10 V RMS Sine 0 to 2 V RMS Random Impedance 100 k Ohms Gain BNC isolated Compressor Output Level 0 to 10 V RMS Sine 0 to 2 V RMS Random Impedance Less than 50 Ohms 5 mA max Gain 0 dB 1 dB ZERO compression 80 dB FULL compression Accel Output Level Sine 0 to 10V RMS Random 0 to 2V RMS Sensitivity 10 mV g Impedance 50 Ohms 5 mA max Frequency Range 2 Hz to 10 kHz Amplitude vs Frequency Dynamic Range 3 of reading 0 5 FS 70 dB minimum Connector BNC isolated Velocity Output Level Sine 0 to 10V RMS Random 0 to 2V RMS Sensitivity 10
5. OPER LED is GREEN 6 The SIGNAL LOSS and FAULT LEDs turn RED if the INPUT signal goes below 30 dB Operation 2 2 Astronics Test Systems Publication No 981000 Rev A 620C User Manual Random Mode 1 When the RESET START is depressed all LEDs except the OPER are GREEN When the FEEDBACK passes the 1 dB detection the OPER LED turns GREEN This arms UNDERTEST and SIGNAL LOSS detection The DISPL OVERTRAVEL is OFF 4 When a fault occurs the detected fault and the FAULT LED turns RED and Burst Mode Controls FAULTS the COMPRESSOR Shutdown and the SHUTDOWN relays are activated 1 When the FAULT RESET is depressed all LEDs are GREEN 2 The UNDERTEST SIGNAL LOSS and DISPL OVERTRAVEL are OFF 3 4 When an OVERTEST FAULT occurs the OVERTEST and FAULT LEDs turn The OVERTEST is active RED and shutdown occurs When any of the preset limits are exceeded the FAULT LED will blink RED and the system will shut down go to FULL compression Also the SHUTDOWN relays will energize The time required to shutdown when a FAULT occurs is comprised of two parts the detection time and the compressor attenuation time The compressor attenuation time is fixed at three milliseconds The detection time is controlled by frequency when in the SINE mode and is fixed when in the random mode Both the amount the limit is exceeded by and the frequency will affect the shutdown time Table 2 1 shows the shutdown time for over
6. for more than 12 months without maintenance unless a component fails Test Equipment Note Equivalent equipment can be used Function Generator Trig Tek 346B AC DC Digital Voltmeter Keithley 191 Switch Settings Note Refer to Figures 1 2 and 1 3 for switch and connector locations Place these switches in the following settings e mV pC g switch to 1 12 e SENSITIVITY switch to 10 00 e ACCEL g s switch to 10 120 e SET LEVEL switch to 100 0 e SE ISO DIFF switch RP to SE e PC mV CURR switch RP to mV e SINE BURST RANDOM switch to SINE e OPER BYPASS switch to OPER e POWER switch to ON Performance Procedure 1 Connect the signal generator to the ACCEL INPUT jack Set the generator for 61 4 0 2 Hz and 100 0 0 5 millivolts RMS 2 Connect the AC Voltmeter to ACCEL AC OUTPUTS jack 3 Observe an indication of 100 3 millivolts RMS on the AC Voltmeter Astronics Test Systems Performance Test 3 1 620C User Manual 9 DE CO TO qe 12 Publication No 981000 Rev A Place the SENSITIVITY thumb switch to 01 00 Observe an indication of 1000 30 millivolts RMS on the AC Voltmeter Comnect the AC Voltmeter to the VELOCITY AC OUTPUTS jack Observe an indication of 1000 50 millivolts RMS on the AC voltmeter Change the generator frequency to 44 3 0 2 Hz Connect the AC Voltmeter to the DISPL AC OUTPUTS jack Observe an indication of 1000 50 millivolts RMS on the AC Voltmeter 11 Return the SENSITIVITY switch to
7. mV IPS Impedance 50 Ohms 5 mA max Frequency Range 5 Hz to 2000 Hz Frequency Response Follow a 6 dB octave slope 10 Hz to 1 000 Hz 3 of reading 1 FS 5 Hz to 2000 Hz 5 of reading 1 FS Astronics Test Systems Introduction 1 3 620C User Manual Publication No 981000 Rev A Dynamic Range 50 dB minimum Connector BNC isolated Displacement Output Terminals Controls Level 0 to 3 V RMS RANDOM Sensitivity 707 V in Impedance 50 Ohms 5 mA max Frequency Range 5 Hz to 2 000 Hz Frequency Response Follows a 12 dB octave slope 10 Hz to 500 Hz 4 of reading 1 of FS 5 to 1000 Hz 5 of reading 1 of FS Dynamic Range 40 dB minimum Connector BNC isolated Shutdown NORMAL Relay NO COM NC contacts relay energizes when any set in limit is exceeded it remains energized until the condition is RESET Shutdown DELAY Relay NO COM NC contacts relay energizes approximately 500 milliseconds after the shutdown relay It remains energized until the condition is RESET RESET START Normally Terminal at GND opens to RESET Shut down Normally Terminal at GND opens to SHUT DOWN BYPASS Normally Terminal at GND opens to BYPASS POWER Switch Turns power ON INPUT Switch RP Selects either pC g mV g or mV g CURR Introduction 1 4 Astronics Test Systems
8. 0 0 1 dB indication on the DEVIATION Meter 4 Change the generator level to 1414 10 millivolts RMS 5 Adjust the DEV GAIN ADJ R3 Figure 4 1 for a 6 0 1 dB indication on the DEVIATION Meter 6 Change the generator level to 1000 10 millivolts RMS 7 Move SINE BURST RANDOM switch on the front of the 620C to RANDOM 8 The DEVIATION Meter on the front panel should show 0 0 2dB Astronics Test Systems Calibration Procedure 4 3 620C User Manual Publication No 981000 Rev A This page was left intentionally blank Calibration Procedure 4 4 Astronics Test Systems
9. A sTRONICS Trig Tek 620C Article Protector User Manual Publication No 981000 Rev A DEVIATION SET OVERTRAVEL BURST SET LEVEL my OPER w RANDOM Bi BYPASS LEVEL SI A s ON DISPL FEED SIG UNDER OVER OV POWER BACK LOSS OPER TEST TEST TRAVEL BYPASS INTERUPT FAULT ov RO UNDER TEST OFF TEST TRIG TEK MODEL 620C ARTICLE PROTECTOR 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 atshelpdeskQastronics com http www astronicstestsystems com Copyright 2014 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 proce
10. Document Control release Astronics Test Systems Publication No 981000 Rev A 620C User Manual Chapter 1 Introduction The Trig Tek 620C Article Protector Figures 1 1 and 1 2 monitors the feedback from an accelerometer on a shaker and provides rapid shutdown when preset limits for acceleration overtest undertest displacement overtravel signal loss or power interrupt is encountered The shutdown is accomplished by an independent compressor circuit which provides a controlled shutdown The time required for shutdown is the total of the detection time plus the compression time When in the SINE mode the detection time is varied by the excitation frequency Itis approximately 100 milliseconds at 20 Hz and changes to about 5 milliseconds at 2000 Hz Time after detection to full compression is about 3 milliseconds When in the RANDOM mode the detection time is preset for 330 milliseconds The ACCEL input is Dual mode and will also operate with Differential accelerometers SENSITIVITY dB SETTINGS DEVIATION SET OVERTRAVEL SET LEVEL BURST OPER SITE ES SINE 2 1 h J J 0 ue RANDOM BYPASS s F POWER i LEVEL SI OVER ERO 0 2990 be z TEST OFF TEST JE 12 4 J 10 120 HUT FEED DER OVER MILLS DA BACK Loss OPER West TEST TRAVEL BYPASS NN TER UPT FAULT eet ee ee acc y TRIG TEK MODEL 620C ARTICLE PROTECTOR Figure 1 1 620C Front View Description A built in dual mode charge amplifier accommoda
11. E BURST RANDOM switch to SINE Astronics Test Systems Calibration Procedure 4 1 620C User Manual Publication No 981000 Rev A Figure 4 1 Main Board Variable Resistor Locations Charge Amplifier Adjustment 1 Connect the signal generator to the ACCEL INPUT jack 2 Set the rear panel SE ISO DIFF switch to SE and the CURR mV pc switch to mV 3 Set the generator for approximately 500 Hz and 707 4 millivolts RMS 4 Connect the AC Voltmeter to the ACCEL AC OUTPUT jack 5 Set the ACCEL FS ADJ R1 Figure 4 1 for 707 5 mV RMS on the AC Voltmeter Velocity and Displacement Adjustments Figure 4 2 A3 Board Resistor Locations Calibration Procedure 4 2 Astronics Test Systems Publication No 981000 Rev A 620C User Manual 1 Set the generator at the ACCEL INPUT for 61 4 0 1 Hz and 707 4 millivolts RMS 2 Connect the AC Voltmeter to the VEL Velocity AC OUTPUT jack 3 Set the VELOCITY ADJ R1 Figure 4 2 on the A3 W34A Integrator Module for a 1000 5 mV RMS indication on the AC Voltmeter 4 Connect the AC Voltmeter to DISPL AC OUTPUT jack 5 Set the generator frequency for 44 3 0 1 Hz 6 Set the DISPL ADJ R2 Figure 4 2 on A3 for a 707 5 millivolts RMS indication on the AC Voltmeter Deviation Meter Adjustments 1 Return the AC meter to the ACCEL AC OUTPUTS jack 2 Set the generator at the ACCEL INPUT for approximately 500 Hz and 707 4 millivolts RMS 3 Set the dB ADJ R2 Figure 4 1 for a 0
12. b Switch The SET OVERTRAVEL monitors the displacement at the protector input This SET OVERTRAVEL switch provides settings from 300 to 2990 MILS P P It should be set to a displacement below the travel of the shaker In the Random and Burst modes the OVERTRAVEL is disabled SINE BURST RANDOM Switch This instrument is designed to monitor and protect test systems that are being subjected either to SINE BURST or RANDOM excitation When the input to the unit is a sine wave the switch should be in the SINE position When Random excitation is being used placing this switch to RANDOM configures the system to a fixed shutdown detection time of approximately 330 milliseconds For a sine burst waveform place the switch to BURST position Tables 2 2 and 2 3 list some of the shutdown times as they related to the overtest level and frequency The last line shows the timing for random noise when the SINE BURST RANDOM switch is placed to RANDOM Astronics Test Systems Operation 2 5 620C User Manual Publication No 981000 Rev A This page was left intentionally blank Operation 2 6 Astronics Test Systems Publication No 981000 Rev A 620C User Manual Chapter 3 Performance Test The procedure in this chapter provides a method of testing the 620C Article Protector for compliance to manufacturer specifications In the event that a reading is out of tolerance the unit may require calibration see Chapter 4 The unit should operate
13. dd a 2 3 Burst Mode naud eli il eat esas dee el At eee Me 2 3 CONTIOIS evden vive Oe AA AA AAA re leas eve av en eee 2 3 FAUST 2 3 RESET START SWite Me spani a ita a a diker begins keen 2 4 SHUTDOWN SWIC estad dt dd da 2 4 MV pC g Switch and Sensitivity Thumb Switch o occccnicnnnnnnnnnccnncccnnoncnn nara nnncnnncc narran ranma 2 4 CURR mV pC Switch Rear Panel mnannnnnnvrnnnnrnnnnnvnnerrrnnnrrvnnnrnnenvennsrrnnnnrnnnnnnnrerressnrnnsnnnnnenne 2 4 SE ISO DIFF Switch Rear Panel masnnnnnnnrnannrnnannvnnenrvnnnrnnnnnvnnnnvennnrrnannnnnnnnnnnnnresnnrnnsnnnenennee 2 4 ACCEL g s Switch and GAIN SET LEVEL Thumb Switch ersnnrnnnrrnnnnvnnnnnvnnenrnnrrrrrnnnrnnennenennr 2 5 OVERTEST and UNDERTEST dB Set Switches oooonccccnccconococonccoconccononananannnanoccnarnnn anna cnn 2 5 SET Displacement OVERTRAVEL Thumb Switch saronannrnnannvnnonrnnnnrrnnnnrnnnnvenrnrrennnrnnnnnnnnennn 2 5 SINE BURST RANDOM Switch cooooocccnccccocccononinononannnoccnnnc conca cn ronca rra 25 O 3 1 Performance Test 3 1 Astronics Test Systems 620C User Manual Publication No 981000 Rev A Test Equipment A AAA Ao GE 3 1 SWITCH SeEtiNGS rt a aia 3 1 Performance Procedure sic cited eae Sia en en Ae i a ene eee e 3 1 deen EE EE 4 1 Calibration Procedure iio el eerie 4 1 O O 4 1 Instrument No AEE FE TE Lic 4 1 Switch Setting Seea a a a a a a ea E e a e A A snr 4 1 Charge Amplifier Adjustment rannnnnannvnnnrronnnrnnannvnnnnvvnn
14. 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 indemnify 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 inflicting A CAUTION This equipment contains voltage hazardous to Q SENSITIVE ELECTRONIC DEVICES DO NOT OPEN personal injury 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 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
15. hes controls and indicators Initial Instrument Setup When a test is ready and all the instruments are ON the 620C RESET START push button switch should be depressed This resets any fault and places the unit in the start up condition CAUTION If the REF input is not used set the START UP switch on the rear panel to OFF NOTE Before RESET the ACCEL and REF inputs must be zero no signal Sine Mode When the RESET START switch is depressed all LEDs should be GREEN except the OPER LED which will be RED The start up sequence will go through the following steps 1 The SET Displacement OVERTRAVEL UNDERTEST and OVERTEST should be set as appropriate for the test To turn off the OVERTRAVEL set switch to 0000 2 If the INPUT signal doesn t pass the 30 dB detector after the REF input is detected the FEEDBACK LED will turn RED and the FAULT LED illuminates and shuts the test down 3 When the INPUT level passes the 1 dB detector the OPER LED turns GREEN and the LEVEL holds at the 0 dB point If it doesn t hold 0 dB when the OVERTEST SET LEVEL is reached the OVERTEST and FAULT LED turns RED and shuts the test down indicating the wrong set g LEVEL or CONTROLLER setting 4 When the OPER LED turns GREEN the DEVIATION meter should be at 0 deviation and all LEDs green Minor adjustment of the ACCEL g s control may be needed to set a 0 deviation 5 The UNDERTEST and SIGNAL LOSS is armed when the
16. nd 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 Systems 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
17. nrrnnnnrnnannnnnenvennnrnnnnnnnnannennenrennnrnsennnenennenen 4 2 Velocity and Displacement Adjustments 0coooonnccccnnnnnccanononccnnnnonnnnnnnnnn cnn nro nn narrar 4 2 Deviation Meter AdjUStMent ssr ranan aE E naar rn nn 4 3 Astronics Test Systems Publication No 981000 Rev A 620C User Manual List of Figures Figure 1 1 620C Front View E A TT IR TS A DI A er 1 1 Figure 1 2 6200 Rear Vi Westin iria dasaasteceauetdecusdbbatecave ude bedaastaveausten aan 1 2 Figure 2 1 Simplified System Block Diagram usnrrnannvnnenvonnnvrvnnnrnnnnnnnrnrrennnrnnnnnnnnrnrenrsrresnnrnnennenrnnn 2 1 Figure 4 1 Main Board Variable Resistor Locations oooccninicocicccnnncnnnnononccnnnnnnnnnnono nc conca ncnnnnn rca 4 2 Figure 4 2 A3 Board Resistor Locations ccececeeceececeeeeeeeeeaeaeeeeeeeeeeeaaaeaeeeeeeesencaaeeeeeeeeeeeesnnaees 4 2 Astronics Test Systems iii 620C User Manual Publication No 981000 Rev A This page was left intentionally blank iv Astronics Test Systems Publication No 981000 Rev A 620C User Manual List of Tables Table 2 1 Sine 3dB OvertestaL miivssnsseneslkemide beud eulkemikdestredvenlkeaie 2 3 Table 2 2 Random White Noise oooonoccccnnnoccccnonocccccnnoncncnononccnnnnoncncnnnonnnnnnnn acc c RE E ARON 2 4 Astronics Test Systems v 620C User Manual vi DOCUMENT CHANGE HISTORY Publication No 981000 Rev A Revision Date Description of Change A 1 16 2014
18. omb output The mV position provides the ability to use mV g signals with no current at the input SE ISO DIFF Switch Rear Panel When the pC Input is selected by the CURR mV pC Switch the charge amplifier input can be operated either in the SE single ended mode or in the ISO isolated mode When in the ISO mode the picocoulomb input to the charge amplifier is floating and is isolated from both chassis and signal ground This position will be used when the pickup is grounded at the mounting point If the pickup is not grounded the SE position of the switch should be selected When mV g is selected the input is always SE In the DIFF position the PC position of the CURR mV pC is selected and the input is via the three pin connector as the plus and minus inputs are being driven Operation 2 4 Astronics Test Systems Publication No 981000 Rev A 620C User Manual ACCEL q s Switch and GAIN SET LEVEL Thumb Switch The GAIN SET Level Switch works in conjunction with the ACCEL g s switch to provide a means to set from 1 to 200 g s as the SET LEVEL Set these switches for the g level that the test is to be run at OVERTEST and UNDERTEST dB Set Switches Each of the switches have six positions to select 1 to 6dB as the OVERTEST or UNDERTEST level The ZERO position turns the function OFF The switch should be placed to the appropriate position as determined by the conditions of the test being run SET Displacement OVERTRAVEL Thum
19. pt LED Illuminates RED if the Power is interrupted It stays lit until the RESET START switch is pressed Fault LED Illuminates RED if any fault occurs or if a signal is present at the compressor input when the RESET START button is pressed Dimensions 3 1 2 inches high 9 inches deep 19 inches wide Power Requirement 90 to 230 V RMS 50 to 400 Hz approx 25 W Introduction 1 6 Astronics Test Systems Publication No 981000 Rev A 620C User Manual Chapter 2 Operation The 620C Article Protector is designed to provide a means of monitoring a Vibration Test System using a controlled vibration exciter This device s purpose is to protect the test article and the shaker The unit monitors the level of vibration in both the Displacement and Acceleration parameters and does an automatic shutdown should any of the preset limits be exceeded This chapter provides a start up sequence and then describes each control and provides a method to best achieve the means of protection for the device being monitored A simplified system block diagram is shown in Figure 2 1 CONTROLLER OLA Output COMPRESSOR OUTPUT PROTECTOR MONITOR SYSTEM BLOCK DIAGRAM SHUTDOWN Relay Figure 2 1 Simplified System Block Diagram Astronics Test Systems Operation 2 1 620C User Manual Publication No 981000 Rev A Start Up Procedure Refer to Figures 1 1 and 1 2 for the location of the various switc
20. sses 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 not 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 atshelpdeskOastronics 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 surrou
21. tes accelerometers with 0 1 to 120 pC mV g sensitivities and also differential accelerometers A built in current source with an ON OFF switch provides power to accelerometers with built in electronics An mV g input can be used with the current OFF The normalized acceleration signal is integrated to velocity and again to displacement and the three parameters Acceleration Velocity and Displacement are simultaneously brought out as normalized AC signals A SINE RANDOM switch selects RMS units at the INPUT for the RANDOM position and PEAK units for the SINE position The acceleration test level is set by a MULTIPLIER and DECADE switch for levels between 0 1 to 100 g s Once the test level is set the OVERTEST dB set and UNDERTEST dB set switches can be set in any of six settings from 1 dB to 6 dB independently In the Sine mode a separate DISPLACEMENT OVERTRAVEL is provided that is responding to the Pk Pk Displacement with up to 2990 MILS in 10 MIL steps A DEVIATION meter provides a monitor to verify the test settings and observe the deviation from the set position Loss of signal detection is Astronics Test Systems Introduction 1 1 620C User Manual Publication No 981000 Rev A provided during the start up mode and when the 1dB REF point is passed the unit switches to the OPERATE mode If there is no feedback to the controller the detector will do a controlled shutdown when the OVERTEST setting is reached Figure 1
22. test dB and frequencies of 5 50 100 500 1K and 5K Table 2 2 shows the Random Shutdown times Table 2 1 Sine 3dB Overtest Frequency Hz Shutdown Time mS 5 110 10 60 50 40 100 25 500 20 1000 20 5000 20 Astronics Test Systems Operation 2 3 620C User Manual Publication No 981000 Rev A Table 2 2 Random White Noise Overtest dB Shutdown Time mS 1 60 3 250 6 1200 NOTE All FAULTS must be removed before RESET The ACCEL and Compressor inputs must be ZERO RESET START Switch This is a push button switch when pressed it resets any fault and sets the unit for start up mode SHUTDOWN Switch This is a push button switch that shuts the system down in 3 milliseconds after being mometarily pressed When the unit is turned on the switch should be tested to assure it is working The FAULT LED should remain illuminated until reset MV pC q Switch and Sensitivity Thumb Switch MV pC g Switch selects the sensitivity range of the Input sensor The Sensitivity thumb switch sets the sensitivity in that range CURR mV pC Switch Rear Panel The CURR mV pC switch provides a means of selecting pC or mV operation of the charge amplifier The mV CURR position turns the Current ON to operate integrated sensors When this switch is placed in the pC position the charge amplifier is configured to accept a charge input from a standard accelerometer with a picocoul
23. up the START condition SET Displacement OVERTRAVEL Thumb Switch START UP OFF ON Switch Provides adjustment from 0 300 to 2 999 MILS for the displacement overtravel set points 0000 disables the DISPLACEMENT OVERTRAVEL Provides a way to disable the REF input as part of the start up sequence Indicators Deviation Level Set Meter 3 1 2 digit digital voltmeter to display the monitor input level Astronics Test Systems Introduction 1 5 620C User Manual Publication No 981000 Rev A Feedback LED Normally illunimates green If Feedback signal is not detected in the start time interval the LED turns red and indicates a fault SIG Loss Illuminates RED turns GRN if FEEDBACK is detected before timer expires Oper LED Illuminates RED and turns GRN when the g level reaches 90 Under Test LED Illuminates RED when the dB SET setting is exceeded It remains lit until the RESET START switch is depressed Over Test LED Illuminates RED when the dB SET setting is exceeded It remains lit until the RESET START switch is pressed Displ Displacement OV Over llluminates RED when the overtest set Travel LED level has been exceeded It remains lit until the RESET START switch is pressed Setting 0000 on the SET OVERTRAVEL thumb switch disables the function Bypass LED Illuminates RED when BYPASS on the OPER BYPASS switch is selected Power Interu
Download Pdf Manuals
Related Search