TB 9-6625-1493-35
20. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
SECTION V
CALIBRATION PROCESS FOR MICROVOLT POTENTIOMETER
JOHN FLUKE, MODEL 831AR/AN
21. Preliminary Instructions
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the results of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturers, manuals for the TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
22. Equipment Setup
WARNING
HIGH VOLTAGE is used or exposed during the performance of
this calibration. DEATH ON CONTACT may result if
personnel fail to observe safety precautions. REDUCE
OUTPUT(s) TO MINIMUM after each step within the
performance check where applicable.
a. Remove protective cover from TI only when necessary to make adjustments. Replace
cover after completing the adjustments.
b. If TI meters do not indicate 0, adjust to 0, using respective adjustment screw located
below meter face.
c. Position controls as listed in (1) through (3) below:
(1) POWER switch to ON.
(2) ELECTRONIC GALVANOMETER switch to CHECK.
(3) INT-EXT switch to INT. ELECTRONIC GALVANOMETER meter will
indicate in green area.
d. Set ELECTRONIC GALVANOMETER switch to OFF.
