Figure 7-6. Testing for shorts.

TM 5-6625-2691-13&P

Figure 7-6. Testing for shorts.

below (fig. 7-7) shows measuring the resistance of a

(4) Look at the needle.

temperature sending unit,

(a) If the needle swings to the far right over the

"0" on the top scale (on all three meters), the circuits

are shorted.

(b) If the needle doesn't move, the circuits are

not shorted.

(c) If the needle jumps or flickers, the circuits

are occasionally shorted.

d. Testing Resistance. To measure resistance in a cir-

cuit, do the following steps:

(1) Set up and "zero" the multimeter (figs. 7-2,7-3

or 7-4).

CAUTION

Failure to do the following step can

damage the multimeter.

(2) Disconnect the circuit being tested.

(3) If the test in this manual calls for an "ohms

range" different than" RXI" or " Xl", set the selector

switch to that range (such as" RX10" or" X10").

NOTE

"Zero" the meter whenever you change ranges.

(4) With all three multimeters, connect the probes

across the circuit or item to be measured. The example

Figure 7-7. Testing resistance.

7-6