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
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