Ph Electrode Quality Check - Lutron Electronics PPH-2108 Operation Manual

7. pH ELECTRODE QUALITY CHECK

If the pH electrode output value already beyond
± 1.2 pH, the electrode's quality is bad, it can not be
used any more and should change the new electrode.
Install the pH electrode, power on the meter, use the
two fingers to press both "
" Button " ( 3-6, Fig. 1 ) Button continuously more
▲
than 2 seconds until the Display show the text " CHK "
and flashing 6 times, then if Display show " oK " ,
means the quality of the electrode is oK.
if Display show " Err ", means the electrode is already
out of life and need to change the new electrode.
8. SYSTEM RESET
Power on the meter, use the two fingers to press " Set
Button " ( 3-4, Fig. 1 ) and " PH/Temp. Button " ( 3-7,
Fig. 1 ) continuously more than 5 seconds until the
Display show the text " rSt ", release the buttons. After
" rSt " text flashing 2 times will return to the normal
screen. The meter system will be reset, all the
calibration data will be cleared, the meter's internal
function will return the default value.
Button " ( 3-5, Fig. 1 ) and
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