24
d.
Open the grounded side of the circuit in which the current is being measured.
Connect the VOM in series with the circuit. Connect the red test lead to the
positive side and the black test lead to the negative side.
e.
Turn the power on. Read the current in milliamperes on the black DC scale.
For the 1 mA range, use the 0-10 figures and divide by 10. For the 10 mA
range, use the 0-10 figures directly. For the 100 mA range, use the 0-10
figures and multiply by 10. For the 500 mA range, use the 0-50 figures and
multiply by 10.
f.
Turn the power off and disconnect the test leads.
This range is only intended for measurements in low voltage circuits (under 25V
DC) such as the primary power in vehicles or their accessories.
4.9.3 Direct Current Measurement 0-10A Range
a.
Plug the black test lead into the -10A
jack and the red test lead into the +10A
jack.
b.
Set the range switch at 10 AMPS (dual
position with 10 mA).
c.
Open the grounded side of the circuit
in which the current is being mea-
sured. Connect the VOM in series with
the circuit, connecting the red test lead
to the positive side and the black test
lead to the negative side.
NOTE:
The function switch has no effect
on polarity for the 10 AMPS range.
d.
Turn the power on. Read the current
directly on the black DC scale. Use the
0-10 figures to read directly in am-
peres.
e.
Turn the power off and disconnect the
test leads.
The 10A range is
not
internally fused in the 260-8P.
When using the 10A range, never disconnect a test lead from a jack or from the
circuit while the circuit is energized. Doing so may damage the test jacks or leads
and the arcing may be hazardous to the operator. Turn off circuit power and wait
for the meter reading to drop to zero.
The polarity reversing feature of the function switch does not operate on the 0-
10A range. If polarity is found to be incorrect, turn off circuit power, wait for the
meter indication to reach zero and then interchange test lead connections to the
circuit.
!
Figure 4-12. Jacks and Switch
Positions for Measuring Direct
Current
D.C
.
D.C
.
500 MA.
50 A.
AMPS.
100MA.
10MA.
AMPS.
1MA.
-10 A.
+
COMMON
-
- D.C.
+ D.C.
260
ALL TERMINALS 1 V MAX
+10A
50 AMPS.
250 MV.
+
!
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