Figure 4-3. Setup for Checking Resistance Measuring Circuits Using EXT RES Terminals.

TM 55-4920-325-14&P

Figure 4-3. Setup for Checking Resistance Mea-

Figure 4-4. Setup for Checking Resistance Mea-

suring Circuits Using EXT RES Terminals.

suring Circuits using TANK UNIT COMP C and

COAX A Connectors.

u. Substitute 100 megohm resistance stan-

dard for 10 megohm resistance standard (table 1-

3) across EXT RES terminals (18) and set Me-

gohmmeter RANGE SELECTOR switch to X100.

Check that MEGOHMMETER indicator (14) reads

100 megohms. Disconnect 100 megohm re-

sistance standard.

v. Connect 100 megohm resistance standard

across TANK UNIT COMP C (10) and TANK

UNIT COAX A (11) connectors as shown in figure

4-4 and set CAP-RES CHECK switch (13) to ME-

GOHMS A-C A-B.

w . Check that MEGOHMMETER Indicator

(14) reads 1 megohm 0.125 inch of scale. Dis-

connect 100 megohm resistance standard.

x. Repeat step w above with 100 megohm re-

sistance standard connected across TANK UNIT

COAX A (11) and TANK UNIT UNSH B (12) con-

Figure 4-5. Setup for Checking Resistance Mea-

ectors as shown in figure 4-5. Disconnect 100

suring Circuits Using TANK UNIT COAX A and

megohm resistance standard.

UNSH B Connectors.

4-3