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TM 10-3930-643-34
GENERAL MAINTENANCE PROCEDURES.
2-13.
Electrical Repair.
(e) Read the meter. If the meter switch
is on the RX1 or X1 range, the reading is taken
directly from the top scale.
If the meter
switch is on a different range,
multiply
the
reading on the scale according to
the table
below.
OHMS SWITCH SETTING
SCALE
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 1000
X10K or RX10K
Multiply reading by 10,000
For example, the meters show the following readings:
OHMS SWITCH SETTING
READING
X1 or RX1
40 ohms
X10 or RX10
400 ohms
(5) Using
the DC volts scale.
Setting up the meter. Before using the
multimeter to measure DC voltage, do the following steps pertaining to the
multimeter you have.
Multimeter must be set to a voltage range higher than that being
measured or multimeter could be damaged.
NOTE
Before using multimeter, check the mechanical zero of the meter.
If
the meter pointer is not exactly over the zero line, reset by
using
the proper size screwdriver to adjust the small screw.
(a) AN/URM-105.
Set meter switch to DC
volts range.
(To measure 24 volts DC, set
switch on 100 DC volts range).
2-13
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