15
Auto Range Digital Multimeter - USB Interface
Current measurement
To avoid damage to the meter or injury if the fuse blows, never
attempt an in-circuit current measurement where the open-circuit
potential to earth is greater than 250V.
To avoid damage to the meter, check the meters fuse before
proceeding. Use the proper terminals, function, and range for your
measurement. Never place the probes in parallel with a circuit or
component when the leads are plugged into the current terminals.
The multimeter's current ranges are 600.0
µ
A, 6000
µ
A, 60.00mA, 600.0mA,
6.000A and 10.00A.
To measure current:
1. Turn 'O
OF
FF
F' power to the circuit. Discharge all high voltage capacitors.
2. Set the dial to the
µµ
A
A,, m
mA
A or A
A range.
3. Press the S
SE
EL
LE
EC
CT
T key to select 'D
DC
C A
A' or 'A
AC
C A
A' measuring mode.
4. Connect the black test lead to the C
CO
OM
M terminal and the red test leads to the
m
mA
A terminal for a maximum of 600mA. For a maximum of 10A, move the red
test lead to the A terminal.
5. Break the circuit path to be tested, touch the black probe to the more negative
side of the break and touch the red probe to the more positive side of the
break. (Reversing the leads will give a negative reading, but will not damage
the meter.)
6. Turn power 'O
ON
N' to the circuit; then read the display. Be sure to note the
measurement units at the right side of the display (
µ
A, mA or A).
When only the figure 'OL' displayed, it indicates overrange situation and the
higher range has to be selected.
7. Turn 'O
OF
FF
F' power to the circuit and discharge all high voltage capacitors.
Remove the meter and restore the circuit to normal operation.
PC-Link
The meter has a serial data output function. It can be connected to a PC by USB
interface, so the measured data can be recorded, analysed, processed and
printed by a PC. Before using this function, you need to install the 'PC-Link'
software and then connect the USB driver in your PC.
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