However after execute the " Calibration clear ".
then make the calibration again. if the Display
still show the " Err " ( error information ), then
the " Standard solution " or the pH electrode "
may existing problem.
The calibration procedures are :
1)Power on the instrument by pressing the " Power button "
( 3-2, Fig. 1 ).
2)Press the " Hold button " ( 3-3, Fig. 1 ) once.
the display will show the " HOLD " symbol.
Press the " button " ( 3-4, Fig. 1 ) once, the display▼
will show following screen in sequence.
screen 1
CAL flashing
screen 2
7.00
CAL
3)Press the " button " ( 3-4, Fig. 1 ) once 3 times,▼
the display will show :
screen 3
CLr
CAL
9
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