4. OPERATING INSTRUCTION
4.1 READ HOLD
If you need data hold when measuring,
you can put on “HOLD” button, it will
hold the reading; if you put the button
again, data hold is not continue.
4.2 BACK LIGHT
If the light is dark to make the reading
difficult when measuring, you can put
on “LIGHT” button to open the back
light.
NOTE:
•
LED is the main source of back light.
Its working current is large, although
the meter has the timer equipment
(time is 5 seconds and it will off
automatically after 5 seconds); often
use back light will shorten the battery
life, you’d better not to use the back
light so frequently if it’s not
necessary.
•
When the battery voltage is less than
7V, it will show “
”. But if you use
back light at the same time, maybe
“
” will come up even if the battery
20 Digital Multimeter