TB 9-4931-501-35
Test instrument voltage
test points
Digital voltmeter indications (V dc)
Min
Max
-15 V
-14.85
-15.15
+5 V
+4.9
+5.1
+15 V
+14.85
+15.15
+200
+180
+220
(7) Press TI POWER switch to off' Remove the time base from the right
compartment and install vertical amplifier into the right compartment.
(8) Remove the high voltage cover and connect digital voltmeter between -3000 V
TEST POINT (fig. 1) and chassis ground, using high voltage probe supplied with digital
(9) Pull TI POWER switch to on. Digital voltmeter should indicate between -
2940 and -3060 V dc.
(10) Press TI POWER switch to off and replace high voltage cover.
b. Adjustment
(1) Adjust -30 V R950 (fig. 2) until digital voltmeter indicates -30 V dc (R).
(2) Adjust +30 V R920 (fig. 2) until digital voltmeter indicates +30 V dc (R).
22. Final Procedure
a. Deenergize and disconnect all equipment and reinstall TI protective cover.
b. In accordance with TM 38-750, annotate and affix DA Label 80 (US Army
Calibrated Instrument). When the TI receives limited or special calibration, annotate
and affix DA Label 163 (US Army Limited or Special Calibration). When the TI cannot
be adjusted within tolerance, annotate and affix DA Form 2417 (US Army Calibration
System Rejected Instrument).
