Figure 4-6. Setup for Checking Resistance Measuring Circuits Using TANK UNIT COAX A Connector and GROUND Terminal.

TM 55-4920-325-14&P

y. Set CAP-RES CHECK switch (13) to ME-

GOHMS A-GRD and repeat step w with 100 me-

gohm resistance standard connected across

T A N K UNIT COAX A connector (11) and

GROUND terminal (5) as shown in figure 4-6. Dis-

connect 100 megohm resistance standard.

Figure 4-7. Setup for Checking Resistance Mea-

suring Circuits Using TANK UNIT COMP C Con-

nector and GROUND Terminal.

Figure 4-6. Setup for Checking Resistance Mea-

suring Circuits Using TANK UNIT COAX A Con-

nector and GROUND Terminal.

z. Set CAP-RES CHECK switch (13) to ME-

GOHMS C-GRD B-GRD and repeat step w above,

with 100 megohm resistance standard connected

first across TANK UNIT COMP C connector (10)

and GROUND terminal (5) as shown in figure 4-7,

and then across TANK UNIT UNSH B connector

(12) and GROUND terminal (5) as shown in figure

4-8. Disconnect 100 megohm resistance standard.

aa. Set Power ON/OFF switch (2) to OFF and

disconnect standard resistance and all cables

from test set.

ab. Check continuity of main cable assembly

(part number 2688) as follows:

NOTE

Figure 4-8. Setup for Checking Resistance Mea-

suring Circuits Using TANK UNIT UNSH B Co

Use multimeter set to R X1 scale for all

nector and GROUND Terminal.

continuity checks.

4-4