[NAFEX] pH meter use
jfruth at uslink.net
Wed Dec 7 10:10:15 EST 2005
To get accurate readings using a 'cheap' pH meter, the user must use a
scrubby, such as a Scotch-brite pad to polish the (oxidized) tip. If the
tip is gray in color, it is oxidized and won't give an accurate reading.
The tip needs to be a sparkling silver color. Equally important is that the
medium to be tested be thoroughy saturated - if too much water is added, the
pH reading will be affected by the pH of the water. Before expecting a pH
reading, allow the material to completely drain before taking a reading.
Pequot Lakes, MN
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