High-Voltage Power Supply

TB 9-6625-149-50

Table 6. Low Voltage Power Supply Accuracy

Test instrument test point

Ac/dc voltmeter indication (V dc)

Min

Max

+ 100

103

+ 225

218.25

231.75

+ 350

339.5

360.5

+ 500

485

515

b. Adjustments. Repeat a(1) above and adjust -150 ADJ. R616 (fig. 1) for a -150 volt

indication on ac/dc voltmeter. (R)

20. High-Voltage Power Supply

a. Performance Check. Connect dc voltmeter (A5) between HV test point (fig. 2)

and chassis ground. If dc voltmeter does not indicate between -1310 and -1390 volts,

perform b below.

b. Adjustments. Adjust HV ADJ. R840 (fig. 1) until dc voltmeter indicates -1350

volts. (R)

21. Final Procedure

a. Deenergize and disconnect all equipment and replace TI within protective cover.

b. In accordance with TM 38-750, annotate and affix DA Label 80 (U.S. Army

Calibration System). When the TI cannot be adjusted within tolerance, annotate and affix

DA Form 2417 (Unserviceable or Limited Use tag).

SECTION V

PRELIMINARY OPERATIONS FOR CURRENT PROBE AMPLIFIER, TEKTRONIX

TYPES 131-1 THROUGH -4, WITH CURRENT PROBE, TEKTRONIX TYPE P6016.

22. Preliminary Instructions

a. The instructions outlined in this section are preparatory to the calibration process.

Personnel should become familiar with sections I, II, V, and VI of this bulletin before

beginning the calibration.

b. Items of equipment used in this procedure are referenced within the text by common

name and item identification number as listed in tables 2 and 3. For the identification of

equipment referenced by item numbers prefixed with A, see table 2, and for prefix B, see