Calibration Data - Fluke 6080A Service Manual

The error tolerance is defined for each procedure as a range of readings around the
target value that the signal generator expects to receive when the adjustment is correct.
The division of responsibility between the controller and signal generator allows
measurement equipment from various manufacturers to be used. Adding a different
meter to the system requires only that a new driver module be written for the
controller.
The design of the controller software has a major impact on the accuracy
realized. One must carefully determine when the readings are settled and
average several readings before sending the result to the 6080A/AN.
Where applicable, the meter specific calibration factors should be applied
to the readings.
A sample program for each of the remote procedures is included in Appendix G. The
programs are written in Fluke BASIC and run on a Fluke 1722A controller.

Calibration Data

The calibration data is stored along with the compensation data in non-volatile
memory. A redundant storage scheme enhances the integrity of the data. One copy of
the data is stored in the battery backed RAM and an identical copy is stored in the
EEPROM.
The rear panel slide switch labeled CAL|COMP must be set to the 1 (ON) position
before a calibration procedure can be initiated. The CAL and COMP annunciators
flash when the switch is in the 1 (ON) position. When a calibration procedure is
initiated, the CAL and COMP annunciators stop flashing, and the CAL annunciator
remains lit during the procedure. When the switch is in the 0 (OFF) position, the data is
write protected in hardware.
The calibration data can be generated in one of two ways: by the Fluke factory or by
the user. Each calibration data segment contains a data origin tag which specifies how
the data was created.
Special function 05 displays the calibration and compensation data origin codes. If no
user calibration or compensation procedures have been performed, the special
function displays origin code 00 to signify that all of the data originated at the Fluke
factory. If any user calibration procedures have been performed, the corresponding
code is displayed. For example, if the AM calibration procedure has been performed
by the user, the data origin special function will display the code 528. A complete list of
the data origin codes is given in Appendix F.
NOTE
CLOSED-CASE CALIBRATION
3-4.
3-3