Extech Instruments MN25 User Manual page 10

DC Current Measurements
CAUTION: Do not make current measurements on the 10A
scale 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 200m A
red test lead banana plug into the
(mA) jack.
3. For current measurements up to 10A
DC, set the function switch to the
10A 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. The display will indicate the
proper decimal point and value.
position and insert the
DC
10 MN25 Version 2.2 Aug 2003