MN42-EU - V1.1 – 07/2010
5
DC VOLTAGE MEASUREMENTS
CAUTION:
Do not measure DC voltages if a motor on the circuit is being switched ON or
OFF. Large voltage surges may occur that can damage the meter.
1.
Set the function switch to the highest VDC position.
2.
Insert the black test lead banana plug into the negative
COM
jack.
Insert the red test lead banana plug into the positive
V
jack.
3.
Touch the black test probe tip to the negative side of the circuit.
Touch the red test probe tip to the positive side of the circuit.
4.
Read the voltage in the display. Move the function switch to
successively lower VDC positions to obtain a higher resolution
reading. The display will indicate proper decimal point and value.
If the polarity is reversed, the display will show (-) minus before
the value.
DC CURRENT MEASUREMENTS
CAUTION:
Do not make current measurements at 10 Amps for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the meter and/or the test leads.
1.
Insert the black test lead banana plug into the negative
COM
jack.
2.
For current measurements up to 200mA DC, set the function
switch to the highest mADC position and insert the red test lead
banana plug into the
mA
jack.
3.
For current measurements up to 10A DC, set the function switch
to the 10A DC range and insert the red test lead banana plug into
the
10A
jack.
4.
Remove power from the circuit under test, then open up the circuit
at the point where you wish to measure current.
5.
Touch the black test probe tip to the negative side of the circuit.
Touch the red test probe tip to the positive side of the circuit.
6.
Apply power to the circuit.
7.
Read the current in the display. For mADC measurements, reset
the function switch to successively lower mADC positions to
obtain a higher resolution reading.
+
-
+
-
