ALWAYS START WITH THE HIGHEST RANGE FOR UNKNOWN CURRENT.
THE “mA INPUT” TERMINAL IS PROTECTED BY A 2000mA/250V F TYPE
FUSE AND “A INPUT” TERMINAL IS FUSED WITH 15A/250V T TYPE.
WARNING
MAKE SURE OF NO POWER BEFORE DISCONNECTING CIRCUIT. EVEN
SMALL AMOUNT OF CURRENT CAN BE DANGEROUS. DO NOT ATTEMPT A
CURRENT MEASUREMENT WHERE VOLTAGE IS ABOVE 600 V. IF THE
FUSE BLOWS, YOU MIGHT BE INJURED OR THE METER DAMAGED.
(1) Plug the red test leads into the “mA input” for less than 2000 mA/dc or into “A
input” terminal between 2000mA and 20A.
(2) Plug the black test leads into the COM input terminal.
(3) Verify dc or ac. Select the function (dc A or ac A) and set the range switch to the
desired volt range. For unknown current, always start from highest range and move
down to lower range to select scale for best reading.
(4) Connect the probe tips in series with the current source to be measured.
(5) Read current value on the Display.
(6) Fuse Replacement
l Disconnect and remove all connections from any live power source.
l Open the top case.
l Locate the defective fuse and remove it in input board.
l Install a new fuse of the SAME SIZE AND RATING.
l Close the top case.
** 20 A ac/dc Measurement - “Max . 15sec each 15minute”
3-3 Resistance Measurement
Resistance is an obstacle that is hindering the current flowing through a conductor.
Ohm is the unit of this resistance.
l The resistance displayed in meter is the total resistance through all possible
paths between red and black probes.
l Resistance must always be measured with meter in series with the circuit.
l Resistance in test lead is about 0.1 - 0.2 ohm
l Be sure that the contact between the probes and the circuit is clean. Contact
resistance coming from dirt, oil, paint, etc. can affect accuracy seriously.
CAUTION
ALL RESISTANCE MEASUREMENTS SHOULD BE TAKEN ON DE-
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