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Labmate™ Hand-held pH Meter Model
P-II $21.50
Labmate™
Hand-held pH Meter Model
P-III (ATC) $26.00
How to Use it:
1. Remove the protective cap and switch on the
unit.
2. Before using, the electrode must be cleaned by
distilled or deionied water to minimize contamination. Wipe the electrode with
tissue paper. During the first time to use, before measuring a sample solution,
dip the electrode in the pH 7 buffer solution. If the display does not show
between 6.9 and/or 7.1, you should adjust the trimmer on the back of the meter
with a screw driver to pH 7.0 (at 25 ºC). Rinse the electrode with distilled
water and wipe it with tissue paper, then you have acquired a read-to use pH
meter.
3. Dip the electrode into the sample solution. Stir
gently and wait for approx. 5 minutes, then the pH value will become
stable.
4. After using, wash the electrode again with
distilled or deionied water, then wipe it with tissue paper and switch off the
unit. Store the electrode with a few drops of pH 7.0 buffer solution, then
replace the protective cap.
5. If the unit cannot be switched on or the display
fades, replace all the batteries with attention to their polarity.
6. When operating above 50 ºC, warm the pH 7.0
buffer solution to the temperature of the sample solution, then calibrate the
meter by adjusting the trimmer.
Related Information: User's Guide to pH Meters
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