GR8-1200 OEM
Midtronics Inc. 7000 Monroe Street Willowbrook, IL 60527
www.midtronics.com
44
AC AMP
(requires the optional amp clamp)
The DC ammeter measures the magnitude and fl ow of the AC
current through a circuit during normal operations.
1. Select the amp clamp range.
1
70 AMP MAX.
2
700 AMP MAX
.
Press the
NE
X
T
soft key to continue.
2. The meter will zero itself.
3. Place the clamp’s jaws around the negative (–) cable.
4. The GR8 will display the measurement.
5. To return to the METERS menu, press the
END
so
ft key
.
Temp
The IR temperature sensor measures surface temperature
within a range of –20 to 200°C. The tool can be used for checking
the transmission for overheating, and the temperature levels
of the heater and air conditioner.
Figure 12
shows how to aim
the GR8’s temperature sensor at a component you are testing.
Ohm Meter
The meter is connected in parallel with the circuit under test
and uses the power supplied by the GR8’s internal batteries to
detect open or excessive resistance.
!
CAUTION
:
Always remove power from the circuit
before connecting the ohmmeter to avoid dam-
aging the analyzer.
1. Connect the DMM test lead to the GR8’s accessories port.
2. Select the meter’s icon.
3. Connect the clamps or probes in the correct polarity: red
clamp or probe to positive (+); black to negative (–).
4. The meter will autorange and display the measurement.
5. When
fi nished, press the
END
soft key.
6. To return to the METERS menu, press the
END
so
ft key
.
Diode
This test measures the voltage drop across components, such
as diodes.
1. Connect the probes test lead to the GR8’s accessories port.
2. Select the meter’s icon.
3. Connect the probes in the correct polarity: red clamp or
probe to positive (+); black to negative (–).
4. The meter will autorange and display the measurement.
5. When
fi nished, press the
END
soft key.
Volts/Amp
(requires the optional amp clamp)
The volts/amp meter simultaneously measures charging
voltage and charging current.
1. Connect the
amp clamp lead
to the GR8’s accessories port.
2. Select the meter’s icon.
3. Select the amp clamp range.
1
70 AMP MAX.
2
700 AMP MAX
.
Press the
NE
X
T
soft key to continue.
4. The meter will zero itself and display the amperage and
voltage measurements.
5. Place the clamp’s jaws around the negative (–) cable.
6. Connect the battery test cable to the GR8.
7.
Connect the battery test clamps in the correct polarity: red
clamp or probe to positive (+); black to negative (–).
8. The GR8 will display the measurement
.
9. To return to the METERS menu, press the
END
s
oft key
.
Multimeter Speci
fi
cations
The accuracy specifi cation is defi ned as ± (n% r [count
* resolution]) at 77 °F.
Table 16: DMM Speci
fi
cations
Range
Resolution
Accuracy
Overload
Protection
V
dc
0–60 V
0.01 V
0.05% + 2
120 Vrms
V
ac
0–24 Vac rms
0.01 Vac
0.1% + 3
120 Vrms
A
dc
0–70 A
0.01 A
± 3% of reading ± 1A 1000 Arms
0–700 A
0.1 A
± 3% of reading ± 1A 1000 Arms
A
ac
0–70 A
0.01 A
± 3% of reading ± 1A 1000 Arms
0–700 A
0.1A
± 3% of reading ± 1A 1000 Arms
Accuracies are speci
fi
ed from 2% to 100% of range.
Range
Resolution
Accuracy
Overload
Protection
O
hm
10
Ω
–2 M
Ω
1
Ω
2.0% + 4
120 Vrms
C
ontinuity
< 10
Ω
1
Ω
2.0% + 4
120 Vrms
D
iode
0–1.5 V
0.01 V
0.05% + 2
120 Vrms
T
emperature
-20–200 °F
1 °F
1.0% + 5
--------
Chapter 14: Digital Multimeter (DMM)
