HTC DM 81, User Manual

Page: 5 / 8

5
8. Diode and Continuity Test
Range Description Measuring Condition
Read approximate forward
voltage of diode
Forward DC current approx. as
1mA;
Inverse DC voltage approx. as
2.8V
Built-in buzzer will sound if
resistance is less than 50Ω,
display resistance approximate
value Open circuit voltage
approximate as 2.8V
-- Overload Protection: 250V effective value
9. The transmission signal detection of infrared remote controller and live wire
recognition (
△
), see operation instruction.
V. Operating Instruction
Pay attention to the “ ” besides the input jack, which shows that the input voltage
or current should be within the specified value. In addition, the range switch should be
at right position for the testing.
1.
Measuring DC Voltage
1> Connect the black test lead to COM jack and the red to V/Ω jack.
2> Set the rotary switch at the desired “V
” range position, connect test leads across
the source or load under
measurement, you can get reading from LCD. The polarity of the red lead connection
will be indicated along
with the voltage value.
NOTE:
a.
When the value scale to be measured is unknown, set the range selector at the highest
position.
b.
When only the figure’1’ is displayed, it indicates over-range situation and the higher
range has to be selected.
c.
“ ” means you can’t input the voltage more than 1000V, it’s possible to show higher
voltage, but it may destroy the inner circuit or pose a shock.
d.
Be cautious against shock when measuring high Voltage
2.
Measuring AC Voltage
1> Connect the black test lead to COM jack and the red to V/Ω jack.
2> Set the rotary switch at the desired “V~” range position, connect test leads across the
source or load under
measurement.
NOTE