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8. ZERO ADJUSTMENT
Put the meter into the clean air environment ( not
contain any CO value ), power on the meter by
pressing the " Power Button " ( 3-2, Fig. 1 ), wait
about 30 seconds to warm up the meter.
If the display not show " Zero " CO value, then pressing
" Alarm Button " ( 3-6, Fig. 1 ) continuously at
least two second will offset the display value and
show " 0 PPM ".
* The zero adjustment procedures are effected only
existing Display value is within 10 PPM.
9. SYSTEM RESET
If the meter happen the troubles such as :
CPU system is hold ( for example, the key button can
not be operated... ).
Then make the system RESET will fix the problem.
The system RESET procedures will be either following
method :
During the power on, use a pin to press the " Reset
Button " ( 3-13, Fig. 1 ) once a while will rest the
circuit system, After execute the " System reset " the
setting value of : Advanced Setting " will be cleared
and return to default value.
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