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Keithley 2750 Service Manual

Keithley 2750
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2-20 Calibration Model 2750 Multimeter/Switch System Service Manual
Manufacturing calibration
The manufacturing calibration procedure is normally performed only at the factory, but
the necessary steps are included here in case the unit is repaired, and the unit requires
these calibration procedures.
NOTE If the unit has been repaired, the entire comprehensive calibration procedure
should also be performed in addition to the manufacturing calibration
procedure.
Recommended test equipment
Table 2-13 summarizes the test equipment required for the manufacturing calibration
steps. In addition, you will need the calibrator (Table 2-1) and signal generator to com-
plete the comprehensive calibration steps.
Extender board preparation
Before performing manufacturing calibration, short the output HI, LO, SHI, and SLO ter-
minals of the 7797 Calibration/Extender together using clean, solid copper wires. These
connections will form a low-thermal short necessary for the manufacturing calibration
procedure. The Calibration Extender Board should then be installed in scanner Slot #1.
Tab le 2- 13
Recommended equipment for manufacturing calibration
Stanford Research Systems DS345 Function Generator:
1V RMS, 3Hz, ±5ppm
1V RMS, 1kHz, ±5ppm
Keithley Model 2001 or 2002 Digital Multimeter:
1V, 3Hz AC, ±0.13%
Keithley 7797 Calibration/Extender Board

Table of Contents

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Keithley 2750 Specifications

General IconGeneral
InterfaceGPIB, RS-232, Ethernet
Switching SpeedUp to 500 channels/second
Maximum Voltage300V
Operating Temperature0°C to 50°C
Measurement FunctionsDCV, ACV, DCI, ACI, 2-wire Resistance, 4-wire Resistance, Frequency, Temperature
Resolution6.5 digits
Current1A
Maximum Current1A

Summary

Performance Verification

Model 2750 Verification Procedures

Covers verification for DCV, ACV, DCI, ACI, Resistance, Dry Circuit Resistance, Temp, Frequency.

Model 7700 Verification Procedures

Covers verification for Model 7700 plug-in module functions.

Calibration

Calibration Procedures

Details comprehensive, front panel, and remote calibration steps.

Manufacturing and Model 7700 Calibration

Covers specific procedures for manufacturing and Model 7700 calibration.

Routine Maintenance

Troubleshooting

Specific Troubleshooting Steps

Covers checks for display, power supply, digital circuits, signal switching, and errors.

Disassembly

Disassembly and Reassembly Procedures

Step-by-step instructions for disassembling and reassembling the instrument.

Accuracy and Optimization

Accuracy Calculations

Explains how to calculate DC, AC, dBm, and dB accuracy.

Calibration Reference

Calibration Program

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