Final Procedure

TB 9-4920-451-35

b. Adjustments

(1) Adjust R58 (fig. 2) for a reading of .1000 MΩ on digital indication.

(2) Adjust R64 (fig. 2) for a reading of .9500 MΩ.

17. 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 CONSOLIDATED AIRBORNE SYSTEMS, MODEL

TF20-1 AND TF579

18. Preliminary Instructions

a. The instructions outlined in paragraphs 18 and 19 are preparatory to the calibration

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 result 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 manufacturer's manual for this TI.

d. Unless otherwise specified, all controls and control settings refer to the TI.

19. 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 top protective cover as required for adjustments.

b. Connect autotransformer to 115 V, 400 Hz source and adjust for 115 V.

c. Connect TI to autotransformer using cables supplied with TI.

d. Set POWER ON/OFF switch to on and allow at least 30 minutes for warm-up and

stabilization.