3.2.9
Current measurement
I
To avoid damage to the Meter or injury if the
I
I
fuse blows, never attempt an in-circuit current
measurement where the open-circuit potential
I
I
to earth is greater than
250K
To avoid damage to the meter, check the meter's
I
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
The Meter's current ranges are 400.OpA, 4000p4,
40.00mA, 400.0mA, and 10.00A.
To measure current:
1. Turn off power to the circuit. Discharge all high voltage
capacitors.
2. Set the rotary switch to the
pA,
mA or A range.
3. Press the
=J-
key to select DCA or ACA measuring
mode.
4. Connect the black test lead to the COM terminal and the
red test leads to the
mA terminal for a maximum of
400mA. For a maximum of 1 OA, 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; 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 on power to the circuit; then read the display. Be
sure to note the measurement units at the right side of
the display
(FA, mA or A). When only the figure "OL"
displayed, it indicates overrange situation and the
higher range has to be selected.
20
7. Turn off power to the circuit and discharge all high voltage
capacitors. Remove the Meter and restore the circuit to
normal operation.
4
TECHNICAL SPECIFICATIONS
4.1
GENERAL SPECIFICATIONS
*
Environment conditions:
IOOOV CAT.
I1
and 600V CAT.
Ill
Pollution degree: 2
Altitude
<
2000m
Operating temperature:
0-40"C, 32°F-122'F (<80% RH, cl O'C non-condensing)
Storage temperature:
-1
0-60
"2,
14°F-140°F (<70%
RH,
battery removed)
'
Temperature Coefficient:
0.1
specified
accuracy)
I
'C (<I 8'C or >28%)
*
MAX.
Voltage between terminals and ealth ground:
750V AC rms or
1000V DC.
*
Fuse Protection:
pA
and mA: F 500mN250V 05x20;
1 OA: F 10N250V 06.3~32.
Sample Rate: 3 timeslsec for digital data.
'
Display:
3 314 digits LCD display. Automatic indication of functions
and symbols.
Range selection: automatic and manual.
Over Range indication: LCD will display "OL".
Low battery indication:
The
"m"
is displayed when the battery is under the
proper operation range.
Polarity indication:
"-"
displayed automatically.
Power source: 9V
-
21
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