Caution
n
If the value of current to be measured is unknown,
use the maximum measurement position (10A)
and 10A terminal, and reduce the range step by
step until a satisfactory reading is obtained.
n
When current measurement has been
completed, switch off the power in the circuit
and disconnect the connection between the
testing leads and the circuit under test.
D. DC CURRENT MEASUREMENT
(see figure 6)
Never attempt an in - circuit current measurement
where the open circuit voltage between terminals
and ground is greater than 60V DC or 30V rms.
(figure 6)
Red
Black
~
V
W
CAP
NPN
PNP °C
m
A
mA
10A
CE
OFF
OFF
Hz
SELECT
RANGE
HOLD
Hz/DUTY
hFE
FUSED
10A/15SEC.
MAX
400mA
1000V MAX
V mA
W
COM
10A
207 MK-1(T)
399.9
E
E B C
~
~
~
~
!
!
16
!
Warning
Use proper terminals, function, and range for
the measurement. When the testing leads are
connected to the current terminals, do not
parallel them across any circuit.
The AC current measurement has 5 measurement
positions on the rotary switch : 400
m
A, 4000
m
A,
40mA, 400mA, 10A.
To measure AC Current, connect the meter
as follows :
1)
Turn off power to the circuit. Discharge all
High - Voltage capacitors.
2)
Insert the red test lead into the mA or 10A terminal
and the black test lead into the
COM
terminal
3)
Set the rotary switch to an appropriate
measurement position in Current range.
4)
Break the current path to be tested. Connect
the red test lead to the positive side of the path
and the black test lead to the negative side of
the path.
5)
Turn on power to the circuit.
The measured value is shown on the display.
(figure 5)
Red
Black
~
V
W
CAP
NPN
PNP °C
m
A
mA
10A
CE
OFF
OFF
Hz
SELECT
RANGE
HOLD
Hz/DUTY
hFE
FUSED
10A/15SEC.
MAX
400mA
1000V MAX
V mA
W
COM
10A
207 MK-1(T)
399.9
E
E B C
~
~
~
~
!
!
15