TB 9-6625-2267-24
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 protective cover from TI only to make adjustments and replace
upon completion.
b. Connect TI to a 115 V ac source.
c. Press POWER ON/OFF pushbutton to ON and allow at least 15 minutes for
stabilization.
8. Dc Voltage
a. Performance Check
and LO.
(1) Connect calibrator OUTPUT HI and LO to TI INPUT V-
(2) Press TI FUNCTION DCV pushbutton.
(3) Press TI RANGE pushbuttons and set calibrator output for settings listed in
table 3. If TI indications are not within limits specified, perform b below.
Table 3. Dc Voltage
Test instrument
Test instrument
RANGE
Calibrator
indications
pushbuttons
output settings
Min
Max
200 mV
190 mV
+189.90
mV
+190.10
mV
200 mV
-190 mV
-189.90
mV
-190.10
mV
2 V
1.9 V
+1.8995
V
+1.9005
V
2 V
-1.9 V
-1.8995
V
-1.9005
V
20 V
19
V
+18.995
V
+19.005
V
20 V
-19
V
-18.995
V
-19.005
V
200 V
190
V
+189.95
V
+190.05
V
1200 V
1000
V
+999.7
V
+1000.3
V
b. Adjustments
(1) Set calibrator for a 1 M
output.
(2) Press TI RANGE 200mV pushbutton.
(3) Adjust C24 (fig. 1) until TI indicates between -00.01 and +00.01.
(4) Set calibrator for a 190 mV dc output. Record TI indication.
(5) Set calibrator for a -190 mV dc output. Adjust C30 (fig. 1) until TI indication is
within 1 digit of indication recorded in (4) above. (R)
(6) Repeat (1) through (5) above until no further adjustments are required.