Simpson 260-8P, Инструкция по эксплуатации, Страница: 16 / 32

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4.4 Test Leads
Test leads are provided with accessory screw-on alligator clips which may be
attached to the probe tips. Eliminating the need to hand-hold test prods to a circuit
for extended periods, the test clips also reduce hand proximity to a high voltage
circuit while energized. Circuit power must of course be turned off and any charged
capacitors discharged before connecting or disconnecting clips to or from the
current.
4.5 DC Voltage Measurement
Before making voltage measurements, review the SAFETY PRECAUTIONS listed
in paragraph 4.1. Also, when using the 260 as a millivoltmeter, take care to pre-
vent damage to the indicating instrument from excessive voltage.
4.5.1 DC Voltage Measurement 0-250 mV Range
Before using the 250 millivolt range, use the 1.0-volt DC range to determine that
the voltage measured is not greater than 250 millivolts (or .25 volt DC).
a.
Set the function switch at +DC (Figure 4-1).
b. Plug the black test lead in the -COMMON jack and the red test lead into the
+50
μ Amps/250mV/10A jack.
c. Set the range switch at 50 μ Amps (COMMON) position with 50V.
d. Connect the black test lead to the negative side of the circuit being measured
and the red test lead to the positive side of the circuit.
e. Read the voltage on the black scale marked DC and use the figures marked
0-250. Read directly in millivolts.
NOTE: For polarity reversing see paragraph 4.2.
4.5.2 DC Voltage Measurement 0-1V Range
a. Set the function switch at +DC (Figure
4-1).
b. Plug the black test lead into the -COM-
MON jack and the red test lead into
the +1V jack.
c. Set the range switch at 1V (COMMON
position with 10V).
d. Connect the black test lead to the nega-
tive side of the circuit being measured
and the red test lead to the positive
side of the circuit.
e. Read the voltage on the black scale
marked DC and use the figures
marked 0-10. Then divide the reading
by 10.
NOTE: For polarity reversing see para-
graph 4.2.
Figure 4-1. Jacks and Switch
Positions for Measuring DC Voltages,
0 through 1V Ranges
!
D.C
.
D.C
.
10 V.
1V.
50 A.
AMPS.
+
COMMON
-
- D.C.
+ D.C.
260
ALL TERMINALS 1 V MAX
+1V.
+10A
50 AMPS.
250 MV.
+
- D.C.
+ D.C.