Common Dc Amperage Measurements; Ac Voltage Measurement; Wall Receptacles; Appliance Receptacles - GB Instruments GDT-190A Manual Del Propietário

circuit is 15 seconds, with a minimum intermission time of 30
seconds between tests.
1) Set the function/range switch to the 10 Amp range with the
leads in their proper jacks.
2) Touch the test leads to the circuit in series (in line with
the circuit) so that the circuit current passes through the
multitester. That means the test leads and the meter are
a "conductor" in the circuit. Read the amperage value
on the display.

5.1 Common DC Amperage Measurements

The DC 10 Amp range of this tester is primarily used in
automotive circuit measurements which use battery power.
Frequent applications encountered with the 10 Amp feature
include troubleshooting headlight wiring, trailer wiring, auto
stereo and speaker systems, RV appliance wiring and other
automotive accessories that draw current from 1 to 10 Amps.
Any circuit powered by batteries or DC generators which
generate 1 to 10 Amps can be measured with this unit.
DO NOT APPLY VOLTAGE TO THE TEST LEADS
WHILE THE TESTER IS SET IN THE 10 AMP
! WARNING
RANGE. See #8 "For Your Safety"

6. AC Voltage Measurement

1) Set the function/range switch to the appropriate
AC V range.
2) Touch the test leads to the circuit under test. With AC
voltage, the polarity of the test leads is not a factor.
Read the voltage level of the circuit on the display.
6.1 Common AC Voltage Measurements

Wall Receptacles

If the receptacle is controlled by a switch, make sure the switch
is ON. Set the function/range switch to the 200 AC V setting.
Touch the test leads to the "hot" and "neutral" slots of the
receptacle (see fig. 4A). The display should read 120V AC. To
test for proper grounding of the receptacle, touch one test lead
to the "hot" (narrow) side of the receptacle, and the other test
lead to the ground slot (fig. 4B). The tester should read 120V
AC as before. To test for proper grounding of non-polarized
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receptacles (fig. 5), alternately touch the test leads between
the receptacle slots and the wall plate screw. The tester should
indicate 120V AC when one test lead contacts the "hot" side of
the receptacle. If ground contact cannot be made on the wall
plate screw, remove the wall plate and touch the electrical box
with the test lead in the same manner as before. The tester
should read 120V AC with one test lead touching the electrical
box and the other touching the live side of the receptacle. If
not, the receptacle is not properly grounded.
Figure 4
4A.
Figure 5

6.2 Appliance Receptacles

Set the function/range switch to the 750V AC setting. Touch
the test leads to the receptacle slots. The tester should read
240V AC between the two "hot" sides of the receptacle, and
120V AC between the neutral slot and either of the two "hot"
sides (fig. 6).
Figure 6
8
4B.