5
forward voltage of this diode.
5) Connect the test leads to two point of circuit, if the resistance is lower than approx. 100Ω,
the buzzer sounds.
Note:
Make sure the power is cut off and all capacitors need to be discharged under this
measurement.
3.7 Frequency and Duty cycle measurement
1) Connect the black test lead to "
COM
" socket and red test lead to the "
VΩHz
" socket.
2) Set the selector switch to desired “
Hz
” position.
3) Press “
Hz/DUTY
” key to choose
Frequency
or
Duty cycle
measurement.
4) Connect the probe across the source or load under measurement.
5) Read the result from the LCD panel.
3.8 Data Hold
On any range, press the “
HOLD
” key to lock display value, and the “
DH
” sign will appear on
the display, press it again to exit.
3.9 MAX/MIN Hold
Press the “
MIN/MAX
” key to lock
MAX
or
MIN
value, and the “
MAX
” or “
MIN
” sign will
appear on the display, press it over 2 seconds to exit. It can not display bar graph on
MAX/MIN HOLD
mode.
3.10 Relative measurement
Press the “
REL
△
” key, you can measure the relative value and “
△
” sign will appears on the
display, the auto range mode be changed to manual range mode. Press it again to exit
relative measurement and “
△
” sign disappears, but you can not go back to auto range mode.
This function is non effective on
Hz /DUTY
measurement. It can not display bar graph on
Relative measurement
mode.
3.11 Auto/Manual range
The auto range mode is a convenient function, but it might be faster to manually set the
range when you measure values that you know to be within
a certain range.
To select manual range, repeatedly press “
RANGE
” key until the display shows the desired
range. The range steps upward as you press “
RANGE
” key. The meter will go back to auto
range mode when you press “
RANGE
” key for more than 2 seconds. It can not select
manual range mode on
Hz/DUTY, capacitance
and
temperature
range.
Caution:
while using the manual range mode, if “
OL
” sign appears on the display,
immediately set range to a higher.
3.12 Back Light
On any range, press the “
HOLD
” key over 2 seconds
to light the back light, press it again for
more than 2 seconds to wink the light. The light can wink automatically after 10 seconds
too.
4. Battery replacement
1) When the battery voltage drop below proper operation range, the “
”
symbol will appear on the LCD display and the battery need to changed.
2) Before changing the battery, set the selector switch to “
OFF
” position.
Open the cover of the battery cabinet by a screwdriver.
3) Replace the old battery with the same type battery.
4) Close the battery cabinet cover and fasten the screw.
Caution:
Dispose the used batteries according to the rules, which are defined
by each community.
5. Fuse replacement
