Preliminary Instructions

TB 9-4910-555-35

Table 3. Accessories Required

Common name

Description (part number)

DC POWER SUPPLY NO. 1

Sorensen, Model DCS40-30E (13589313)

DC POWER SUPPLY NO. 2

Dynamic Industries Corp., Model 55314-104054

(MIS-38956)

HYDRAULIC COMPARATOR

3712-4-3 (13534038)

NITROGEN SOURCE

Compressed cylinder (7916197)

PRESSURE CONTROLLER

(MIS-10324)

PRESSURE REGULATOR

(MIS-10325, Type 2)

VACUUM PUMP

(7915882)

SECTION III

CALIBRATION PROCESS FOR

VEHICLE TEST METER (VTM)

6. Preliminary Instructions

a. The instructions outlined in paragraphs 6 and 7 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 tables 2 and 3.

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 TM 9-4910-571-12&P and TM 9-4910-571-34&P

for this TI.

d. Unless otherwise specified, all controls and control settings in this section refer to

the TI.

e. Label current probe, high-pressure transducer, and low-pressure transducer with

the following: "To be used only with VTM, Serial # ________ for VTM calibration to

be valid".

7. 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. Connect cable W2 to TI J4 connector.

b. Connect cable W5 to TI J1 connector.

c. Connect cable W5 red and black leads to the + (positive) and - (negative) terminals of

dc power supply No. 1. Observe polarity.