Keithley 2750, Service Manual

Page: 16 / 179

1-4 Performance Verification Model 2750 Multimeter/Switch System Service Manual
Recommended test equipment
Table 1-1 summarizes recommended verification equipment. You can use alternate equip-
ment as long as that equipment has specifications at least as good as those listed in
Table 1-1 . In general, equipment uncertainty should be at least four times better than cor-
responding Model 2750 specifications. Keep in mind, however, that calibrator uncertainty
will add to the uncertainty of each measurement.
Table 1-1
Recommended verification equipment
Fluke 5700A Calibrator:
DC Voltage
AC Voltage
(1kHz, 50kHz) DC Current
AC Current
(1kHZ) Resistance
100mV:±14ppm
1.0V:±7ppm
10V:±5ppm
100V:±7ppm
1000V:±9ppm
100mV:±200ppm
1.0V:±82ppm
10V:±82ppm
100V:±90ppm
700V:±85ppm
20mA:±60ppm
100mA:±70ppm
1A:±110ppm
2.2A:±94ppm
1A:±690ppm
2.2A:±682ppm
1

:±95ppm
10

:±17ppm
100

:±17ppm
1k

:±12ppm
10k

:±11ppm
100k

:±13ppm
1M

:±18ppm
10M

:±37ppm
100M

:±120ppm
Fluke 5725A Amplifier:
AC Voltage, 50kHz: 700V, ±375ppm
DC Current, 3A, ±500ppm
AC Current, 1kHz, 3A, ±457ppm
Stanford Research Systems DS345 Function Generator:
1V RMS 1kHz, ±5ppm
General Radio 1433-T Precision Decade Resistance Box:
10

to 400

, ±0.02%
Miscellaneous Equipment:
Double banana plug to double banana plug shielded cables (2)
BNC to double banana plug shielded cable
Note: The Fluke 5725A amplifier is necessary only if you wish to verify the 750V AC range at 50kHz and 3A AC and DC current
ranges at 3A. Verification at 220V, 50kHz, and 2.2A on the current ranges using only the 5700A calibrator is adequate for most
applications. Calibrator 1

uncertainty is not four times better than Model 2750 1

range accuracy.