Manuali utente per Keithley 2701/E Digital-Multimeter, DMM,

Sommario

• Introduction

  1
• Verification test requirements

  1
• Environmental conditions

  1
• Warm-up period

  1
• Line power

  1
• Recommended test equipment

  1
• Verification limits

  1
• Example reading limit calculation

  1
• Calculating resistance reading limits

  1
• Restoring factory defaults

  1
• Performing the verification test procedures

  1
• Verification test summary

  1
• Test considerations

  1
• Model 2701 verification

  1
• Verifying DC voltage

  1
• Verifying AC voltage

  1
• Verifying DC current

  1
• Verifying AC current

  1
• Verifying resistance

  1
• Verifying temperature

  1
• Verifying frequency

  1
• Model 7700 verification

  1
• Verifying DC voltage

  1
• Verifying AC voltage

  1
• Verifying DC current

  1
• Verifying AC current

  1
• Verifying resistance

  1
• Verifying temperature

  1
• Verifying frequency

  1
• Verifying ratio and average

  1
• Connections for Model 2701 DC volts verification

  1
• Connections for Model 2701 AC volts verification

  1
• Connections for Model 2701 DC current verification

  1
• Connections for Model 2701 AC current verification

  1
• (100ΩΩ to 10MΩ ranges)

  1
• (100MΩ range)

  1
• Connections for Model 2701 frequency verification

  1
• Connections for Model 7700 DC volts verification

  1
• Connections for Model 7700 AC volts verification

  1
• Connections for Model 7700 DC current verification

  1
• Connections for Model 7700 AC current verification

  1
• (100Ω to 10MΩ ranges)

  1
• (100MΩ range)

  1
• verification

  1
• Connections for Model 7700 frequency verification

  1
• Recommended verification equipment

  1
• DCV reading limits

  1
• ACV reading limits

  1
• DCI limits

  1
• ACI limits

  1
• Limits for resistance verification

  1
• Thermocouple temperature verification reading limits

  1
• Four-wire RTD temperature verification reading limits

  1
• Plug-in module DCV reading limits

  1
• Plug-in module ACV reading limits

  1
• Plug-in module DCI limits

  1
• Plug-in module ACI limits

  1
• Limits for plug-in module resistance verification

  1
• reading limits

  1
• reading limits

  1
• Introduction

  2
• Environmental conditions

  2
• Warm-up period

  2
• Line power

  2
• Calibration considerations

  2
• Calibration code

  2
• Front panel calibration code

  2
• Remote calibration code

  2
• Comprehensive calibration

  2
• Calibration cycle

  2
• Recommended equipment

  2
• Aborting calibration

  2
• Front panel calibration

  2
• Remote calibration

  2
• Manufacturing calibration

  2
• Recommended test equipment

  2
• Calibration card preparation

  2
• Unlocking manufacturing calibration

  2
• Measuring function generator signal amplitude

  2
• Front panel manufacturing calibration

  2
• Remote manufacturing calibration

  2
• Model 7700 calibration

  2
• Recommended test equipment

  2
• Calibration card connections

  2
• Model 7700 calibration

  2
• Low thermal short connections

  2
• Connections for DC volts and ohms calibration

  2
• Connections for DC and AC amps calibration

  2
• Connections for AC volts calibration

  2
• calibration

  2
• Recommended equipment for comprehensive calibration

  2
• Comprehensive calibration procedures

  2
• DC volts calibration summary

  2
• Ohms calibration summary

  2
• DC current calibration summary

  2
• AC voltage calibration summary

  2
• AC current calibration summary

  2
• DC voltage calibration programming steps

  2
• Resistance calibration programming steps

  2
• DC current calibration programming steps

  2
• AC voltage calibration programming steps

  2
• AC current calibration programming steps

  2
• Recommended equipment for Model 7700 calibration

  2
• Introduction

  3
• Setting the line voltage and replacing the line fuse

  3
• Replacing the front terminal AMPS fuse

  3
• Replacing Model 7700 plug-in module amps fuses

  3
• Replacing non-volatile RAM battery

  3
• Plug-in module relay closure count

  3
• Closure count commands

  3
• Reading relay closure count

  3
• Resetting relay closure count

  3
• Setting count update interval

  3
• Power module

  3
• Front terminal AMPS fuse

  3
• Model 7700 amps fuses

  3
• Power line fuse

  3
• Closure count commands

  3
• Introduction

  4
• Repair considerations

  4
• Power-on self-tests

  4
• RAM and EPROM tests

  4
• Flash memory tests

  4
• Front panel tests

  4
• KEY test

  4
• DISP test

  4
• Principles of operation

  4
• Power supply

  4
• Display board

  4
• Digital circuitry

  4
• Analog circuitry

  4
• Troubleshooting

  4
• Display board checks

  4
• Power supply checks

  4
• Digital circuitry checks

  4
• Analog signal switching states

  4
• Power supply block diagram

  4
• Digital circuitry block diagram

  4
• Analog circuitry block diagram

  4
• Ohms open-lead sense detection block diagram

  4
• Flash memory failure modes

  4
• Power supply components

  4
• Display board checks

  4
• Power supply checks

  4
• Digital circuitry checks

  4
• DCV signal switching

  4
• Ω2 signal switching

  4
• ACV and FREQ signal switching

  4
• Ω2/Ω4 reference switching

  4
• DCA signal switching

  4
• Ω4 signal switching

  4
• DCV signal multiplexing and gain

  4
• ACV and ACA signal multiplexing and gain

  4
• ACA signal switching

  4
• Ω2 signal multiplexing and gain

  4
• Ω4 signal multiplexing and gain

  4
• DCA signal multiplexing and gain

  4
• Switching device locations

  4
• Introduction

  5
• Handling and cleaning

  5
• Handling PC boards

  5
• Solder repairs

  5
• Static sensitive devices

  5
• Assembly drawings

  5
• Disassembly procedures

  5
• Case cover removal

  5
• Motherboard removal

  5
• Card cage removal

  5
• Front panel disassembly

  5
• Removing power components

  5
• Instrument reassembly

  5
• Input terminal wire connections

  5
• Power module wire connections

  5
• Input terminal wire colors

  5
• Power module wire colors

  5
• Introduction

  6
• Parts lists

  6
• Ordering information

  6
• Factory service

  6
• Component layouts

  6
• Model 2701 motherboard parts list

  6
• Model 2701 display board parts list

  6
• Model 2701 backplane board parts list

  6
• Model 2701 miscellaneous parts list

  6
• Model 7700 parts list

  6