Factory Calibration; Recommended Test Equipment - Keithley 2182 Service Manual

2-12 Calibration
Saving calibration constants
After completing the calibration procedure, send the following command to save the new
calibration constants:
:CAL:PROT:SAVE
NOTE
Locking out calibration
After saving calibration, send the following command to lock out calibration:
:CAL:PROT:LOCK

Factory calibration

The following calibration procedures are normally performed only at the factory, but the
necessary steps are included here in case the unit is repaired (such as changing internal
components), and the unit requires these calibration procedures. The unit will also require
factory calibration if a +516, "Linearity Precal Lost" error occurs.

Recommended test equipment

Table 2-6
steps.
Table 2-6
Recommended factory calibration equipment
Description
DC Calibrator
Low Thermal Input Cable
Low Thermal Short
BNC-to-Clip Leads
* 90-day total uncertainty at specified output.
Calibration constants will not be saved unless the :SAVE command is sent.
Calibration constants can be returned using the :CAL:PROT:DATA? command. For
details, see "Miscellaneous commands, :DATA?" in Appendix B.
Default calibration constants and tolerances are listed in
summarizes the test equipment recommended for the manufacturing calibration
Manufacturer/model
Fluke 5700A
Keithley 2107
Keithley 2188
Appendix B (see Table B-2).
Specifications*
1V: ±7ppm
10V: ±5ppm