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Page Title:
MEASURING RESISTANCE |
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 TM 5-2420-224-20-1
MEASURING
1.
Set and zero multimeter for OHMS RX1.
CAUTION
The multimeter can be damaged unless power is removed from the circuit
b e i n g tested.
2.
Disconnect circuit being tested from its power source. To be safe, check for voltage first (page 3-9).
NOTE
Zero multimeter every time you change ranges.
If test calls for an ohms range different than RX1 (or X1), set selector switch to that range (such as
3.
RX10 or X10).
4.
Connect probes to circuit or item to be measured.
Read multimeter scale. If it is set to RX1 or X1 range, take reading directly from OHMS
scale.
5.
multimeter is set to a different range, multiply reading on scale according to the table below.
OHMS SWITCH SETTING
X1 or RX1
Read number on scale
X10 or RX10
Multiply reading by 10
X100 or RX100
Multiply reading by 100
X1K or RX1K
Multiply reading by 1,000
X10K or RX10K
Multiply reading by 10,000
(REMEMBER: K=1,000)
For example, the multimeters below indicate the following readings:
OHMS SWITCH SETTING
READING (OHMS)
X1 or RX1
4
X10 or RX10
40
TS-352 B/U
SIMPSON 160
AN/PSM-45
3-7
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