The AC Voltage measurement has 5 measurement
positions on the rotary switch : 400mV, 4V, 40V,
400V and 750V
To measure AC Voltage, connect the Meter as
follows :
1) Insert the red test lead into the
V
W
terminal
and the black test lead into the
COM
terminal.
2) Set the rotary switch to an appropriate
measurement position in V ~ range.
3) Connect the test leads across with the object
being measured.
The measured value is shown on the display, which
is effective value of sine wave (mean value response).
Caution :
n
If the value of voltage to be measured is
unknown, use the maximum measurement
position (750V) and reduce the range step by
step until a satisfactory reading is obtained.
n
The LCD displays “1“ indicating the existing selected
range is overloaded, it is required to select a
higher range in order to obtain a correct reading.
n
When AC Voltage measurement has been
completed, disconnect the connection between
the testing leads and the circuit under test.
C. AC CURRENT MEASUREMENT
(see figure 5)
Warning :
Never attempt an in - circuit current
measurement where the open circuit voltage
between terminals and ground is greater than
60V DC or 30V rms. If the fuse burns out during
measurement, the Meter may be damaged or the
operator himself may be hurt.
!
14
Caution :
n
If the value of voltage to be measured is
unknown, use the maximum measurement
position (1000V) and reduce the range step by
step until a satisfactory reading is obtained.
n
The LCD displays “1” indicating the existing
selected range is overloaded, it is required to select
a higher range in order to obtain a correct reading.
n
In each range, the Meter has an input impedance
of approx. 10M
W
. This loading effect can cause
measurement errors in high impedance circuits.
If the circuit impedance is less than or equal to
10k
W
, the error is negligible (0.1% or less).
n
When DC voltage measurement has been
completed, disconnect the connection between
the testing leads and the circuit under test.
B. AC VOLTAGE MEASUREMENT
(see figure 4)
Warning :
To avoid harm to you or damages to the Meter
from electric shock, please do not attempt to
measure voltages higher than 1000V or 750V
rms although readings may be obtained.
( Figure 4 )
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
~
~
~
~
!
!
!
13
