TM 9-2330-356-14
(4) Read the meter. Interpret the results as
CAUTION
follows:
Failure to disconnect the battery ground
(a) If the needle swings toward the 0 on the
cable (or outside power source) can damage
top scale, the circuits are shorted (or the circuit is
the meter.
grounded, if testing to ground).
(b) If the needle doesn't move, the circuits
(2) Disconnect the battey ground cable at the
are okay.
battey. Then disconnect the circuit being tested.
(c) If the needle jumps or flickers, the
NOTE
circuits are shorted (or grounded) intermittently.
Whenever you change switch settings, zero
the meter again.
(3) Select the correct ohms switch setting
maximum allowable reading, use the Xl or RX1 scale
TA099765
or Grounds.
d.
depend on the circuit being tested, For most direct wiring
circuits (e.g., lighting), a maximum of 3 ohms within the
wiring is satisfactory. Where other ohms readings are
allowable (e.g., 10,000 ohms in the coil), they are specified
in the particular section dealing with that circuit or
TA099766
Reading means
Meter reads
How to read scale
Switch
400 ohms
4
Read the number on the scale
X1 or RX1
40 ohms
4
Multiply scale reading by 10
X1O or RX 1O
400 ohms
4
Multiply reading by 100
X1OO or RX1OO
--
Multiply reading by 1000
X1K or RX1K
--
Multiply reading by 10000
X1OK or RX1OK