Equipment Setup

TB 9-6625-2252-35

7. Equipment Setup

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 TI protective cover as required for adjustments.

Replace cover after

completing the adjustments.

b. Connect shorting link between TI INPUT LOW and GND.

c. Set switches as listed in (1) through (3) below:

(1) RANGE to 1.

(2) MODE to DC+.

(3) NULL SENS to TVM.

d. If TI does not indicate center scale (zero), adjust mechanical zero adjustment

(located under meter) until TI indicates center scale (zero).

e. Connect TI to a 115 V ac source.

f. Set POWER switch to ON and allow at least 1 hour for equipment to warm-up

and stabilize.

g. Short TI INPUT HI and LOW. If TI does not indicate center scale (zero), adjust

A5R4 SHT CKT ZERO (fig. 1) until TI indicates center scale.

h. Remove short from TI INPUT HI and LOW. If TI does not indicate center scale

(zero), adjust A5R6 OPEN CKT ZERO (fig. 1) until TI indicates center scale.

i. Connect multimeter INPUT HI and LO to TI rear panel RECORDER OUTPUT

and GND. If multimeter does not indicate 0 ±0.1 V dc, adjust A4R2 REC ZERO (fig. 1)

until multimeter indicates 0 ±0.1 V dc (R).