Table 2-1. Control Panel, Operating Controls, Indicators, and Connectors (continued).

TM 55-4920-325-14&P

Table 2-1. Control Panel, Operating Controls, Indicators, and Connectors (continued).

Name of Control,

Figure 2-1

Function

Indicator, or

Index

C onnector

Number

CAP-RES CHECK switch

to measure resistance

( S 1 0 3 ) (continued)

between aircraft tank unit

probe COAX A and UNSH B

connectors.

Similarly, when FUNCTION

SELECTOR switch is set to

TANK UNIT TEST-COMP

and CAP-RES CHECK

switch is set to MEGOHMS

C-GRD, test set measures

resistance between air-

craft tank unit COMP C

connection and ground.

Setting FUNCTION

SELECTOR switch to TANK

UNIT UNSH and CAP-RES

CHECK switch to MEG-

OHMS B-GRD allows test

set to measure resistance

between aircraft tank unit

probe UNSH B connector

and ground.

Setting test set CAP-RES

CHECK switch to MEG-

OHMS A-GRD allows test

set to measure resistance

between aircraft tank unit

probe COAX A connector

and ground.

When test set CAP-RES

CHECK switch is set to

MEGOHMS EXT RES, test

set can be used to measure

insulation resistance of any

aircraft system wiring.

MEGOHMMETER indicator

Displays measured resist-

ance in megohms. Oper-

ates in conjunction with

Megohmmeter RANGE

SELECTOR switch.

Resistance displayed on

indicator is a multiple of

setting selected on Meg-

ohmmeter RANGE

SELECTOR switch.

Operates in conjunction with

Megohmmeter ZERO ADJ

Megohmmeter RANGE

control (R107)

SELECTOR switch.

2-5