Страница 1: ...xcess underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals De...
Страница 2: ...Model 247 High Voltage Supply Instruction Manual Contains Operating and Servicing Information Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 3: ...NEITHER KEITHLEY INSTRUMENTS INC NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT INDI RECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE E...
Страница 4: ...Q 1990 Keithley Instruments Inc Test Instrumentation Group All rights reserved Cleveland Ohio U S A December 1992 Sixth Printing Document Number 31834 Rev F Artisan Technology Group Quality Instrument...
Страница 5: ...r registered trademarks of Keithley Instruments Inc Other brand and product names are trademarks or registered trademarks of their respective holders Artisan Technology Group Quality Instrumentation G...
Страница 6: ...own circuit before measuring Inspect the connecting cables test leads and jumpers for possible wear cracks or breaks before each use For maximum safety do not touch the voltage supply test fixture tes...
Страница 7: ...mVp p 3kV 6mA lmV 3mVp p lkV lmA lOHz 1OOkHz SE ITLING TIME 4 seconds to within 1V with full resistive load OVERLOAD PROTECTIONr Short circuit proof arc protected self restoring METER Monitors voltage...
Страница 8: ...of 247 wit Photomultipliers 2 4 2 8 2 Application of 247 to Resisfivify Measurements 2 4 2 8 3 Application of 247 with Ionization Chambers 2 4 SECTION 3 Theory of Operation 3 1 FUNCTIONALDESCRTMTON 3...
Страница 9: ...List of Tables SECTION 4 Maintenance Table 41 Recommended Test Equipment 41 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 10: ...Figure 2 4 PhotomultiplierCircuit 2 4 Figure 2 5 Resistivity Measurement 2 4 Figure 2 6 Ionization Chamber Circuit 24 SECTION 3 Theory of Operation Figure 3 l High Voltage Power Supply Block Diagram...
Страница 11: ...front panel controls and a polarity selector switch The rear panel features a HV output connector line power plug fuse and a voltage selector switch The unit is arc and short circuit protected for saf...
Страница 12: ...while still under warranty less than 12 struction Manual If there is a need to exercise the War ranty contact the factory to determine the proper action months since date of shipment will void the to...
Страница 13: ...PANEL CONTROLS AND TERMINALS Power Switch A rocker switch turns the line power on or off to the entire instrument The rocker switch has a built in pilot lamp that is lit when the power switch is on V...
Страница 14: ...oltage Selector The line voltage selector selects the appropriate line voltage 90 127VAC or MO 254V AC Output Connector The output connector is a h4lW type UG931 U connector It mates with a h4HY type...
Страница 15: ...rcuit that automatically drops the output voltage to a safe level when the rated output current is exceeded by 20 Refer to the Maximum Current specification when operating the unit at reduced output v...
Страница 16: ...d with a picoammeter or electrometer With a source voltage of 1000 volts or more higher resis tance materials may be measured Flexible materials such as PVC rubber or paper may be tested with the Mode...
Страница 17: ...is a function of a control voltage which per forms the function of control and regulation A sample of the output voltage is compared against a reference volt age in the sensing circuit The sensing ci...
Страница 18: ...voltage Output voltage control is obtained by varying the command voltage fed to the error amplifier The error amplifier compares the command voltage and the signal from the output voltage sense circ...
Страница 19: ...mal safety precautions are not observed WARNING To prevent a shock hazard remove the line cord and all test leads from the instrument before removing any cover 4 2 RECOMMENDED TEST EQUIPMENT The recom...
Страница 20: ...d and full voltage 3000V at 6mA by using the load resistor E on the output Adjust R178 until the voltage drops off and then back off of R178 approximately l 8 of a turn Potentiometer R173 is a Frequen...
Страница 21: ...only the low voltage B and the unregulated 20 volt power supplies operable Turn on the AC line power and measure the DC voltage obtained across R101 See Figure 4 l for location This voltage should be...
Страница 22: ...SECTION 4 Mainfenance R171 RI73 R178 R172 Power Switch y z output InltanP Assembly Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 23: ...nstrument Model Number 2 Instrument Serial Number 3 Parts Description 4 Circuit Description if applicable 5 PartNumber 5 3 FACTORY SERVICE If the instrument is to be returned to the factory for serv i...
Страница 24: ...WI Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 25: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 26: ...ries and fuses are OK a Checked all cables u Calibration only 0 Data required a Certificate of calibration required attach any additional sheets as necessary Show a block diagram of your measurement s...
Страница 27: ...st Instrumentation Group Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44 139 Printedin the U S A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg co...
Страница 28: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...
