Keithley 7058, Instruction Manual

Page 1: ...t Service Center Repairs Experienced Engineers and Technicians on staff in our State of the art Full Service In House Service Center Facility InstraView Remote Inspection Remotely inspect equipment be...

Page 2: ...Model 7058 low Current Scanner Plug In Card Instruction Manual Contains Operating and Servicing Information...

Page 3: ......

Page 4: ...w Current Scanner Plug In Card Instruction Manual 0 1991 Keithley Instruments Inc Test Instrumentation Group All rights reserved Cleveland Ohio U S A October 1991 Second Printing Document Number 7058...

Page 5: ...or jacks or test fixtures 111 American National Standards lostitute ANSI stam that a shock hazard exists wheo voltage levels greater than 30V RMS 42 4V peak or 60VDC are present A good safety practice...

Page 6: ...rsooal cootect with these voltages TIE WARNING beading in A manual enplaios dangers that might result in personal injury or death Always read the associated information wy carefully hcfore ptxformiog...

Page 7: ...A typical COMMON MODE VOLTAGE X 3 peak GENERAL OPERATING ENWRONMEM 0 10 50 C up lo 35 C at 70 RH STORAGE ENVIRONMENT 25 C lo 65 C DIMENSIONS WEIGHT 32mm high X 114mm wide X 4 X 10 Net weight 0 54kS 19...

Page 8: ...rformanceVerification 8 SECTION I REPLACEABLE PARTS Introduction 13 ReplaceablePans 13 Ordering Information 13 FactoryService 13 Component Layout and Schematic Diagram 13 LIST OF FIGURES Typical Multi...

Page 9: ...put resistance for making voltage measurements AC or DC signals up to lOOmA or 28V may be switched Triaxial input and output connec tions to the scanner plug in card ere easily made through the rear p...

Page 10: ...aoolications where current sources are to be sc ned That is ch source is short circuited when it is not being selected This short it is made through a removesblejumper located on the underside of the...

Page 11: ...fect Extreme environmental conditions can also cause the offset current to go beyond 1pA If the scanner has been exposed to very high humidity and or temperature ifor instance during shipping1 the boa...

Page 12: ...when all the relay8 are off relay K311 not energized Relay K311 is an isolation relay that isolates all circuitry on the card from the output connectors when no channel is selected The modification i...

Page 13: ...unsoldered to prevent the possibility of flux vapor from contaminating the in Sulators 4 If it becomes necessary to solder the jumpers back an to the card the solder ing should be done carefully and...

Page 14: ...nnect the Model 7024 3 triaxial cable from one of the OUTPUT connec tors on the Model 7059 to the input of the electrometer Set the elec trometer to the 10 A range and LB Ocheck C Inself the Model 705...

Page 15: ...nels and also with all relays off Figure 4 Test Set Up For Offset Current Test Figure 5 Test Set Up For Signal Path Resistance Test MODEL 7023 JIGITAL 1 LECTRO itl COAXIAL CABLE DIELECTRIC STRENtJTH 1...

Page 16: ...st 1OVto OV transition on the display should be less than Gmsec E The time for the contaciz to completely close should be less than Gmsec F Set the oscilloscope to I trigger G Verify that the time to...

Page 17: ...eter out of ZERO CHECK Program the channel under test es open and other channels as closed E Take the reading on the electrometer The reading should be less than 1 x lOt3A Using Ohm s Law calculate th...

Page 18: ...Oscilloscope J Square Wave Generator K Accessory Triaxial Cables 21 L Tdaxial Connector lFemalel Specifications Sensititin to 10 12A 1v full range Triaxial cable 3 foot long c 10 sensitivity Triaxial...

Page 19: ...ription lif applicable 5 Keithky Pan Number 4 4 FACTORY SERVICE If the instrument is to be returned to the factory for sewice please complete the ewice form which follows this section and return it wi...

Page 20: ...Slot Fil Head Screw 20 required l 4 Flat Brass Washer 12 required No 4 40 x 114 Nylon Slot Roung Head Screw 4 required Bracket Front Connector Mounting 27079 Connector Triax 16 required cs 161 Shield...

Page 21: ...Figure 9 Model 7059 Component Location Drawing 15...

Page 22: ...i L I II i 1 I Figure 10 Model 7058 Schematic Diagram 17...

Page 23: ...Service Form...

Page 24: ...Keithley Instruments Inc Test Instrumentation Group 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A...

Page 25: ...t Service Center Repairs Experienced Engineers and Technicians on staff in our State of the art Full Service In House Service Center Facility InstraView Remote Inspection Remotely inspect equipment be...