2. HELPFUL OPERATING TECHNIQUES
1)The electrode is shipped in a plastic bottle containing a
solution of pH 4 buffer and potassium chloride. The
electrode should remain in the bottle until it is used. If
the electrode is used infrequently the bottle and its
solution should be saved and the electrode stored in it
(see the Electrode Storage Section).
2)During shipment the air bubble in the electrode's stem
may move into the bulb area. If bubbles are seen in the
bulb area, hold the electrode by its top cap and shake
downwards as is done with a clinical thermometer.
3)Vigorously stir the electrode in the sample, buffer or rinse
solution. This action will bring solution to the electrode's
surface more quickly and improve speed of response.
4)After exposure to a sample, buffer or rinse solution,
shake the electrode with a snap motion to remove
residual drops of solution. This action will minimize
contamination from carryover.
5)As a rinse solution, use a part of the next sample or buffer
which is to be measured. This action also will minimize
contamination from carryover.
6)When calibrating, use a buffer close in value to that
expected from the sample. This action will minimize span
errors.
7)Keep buffers and samples at the same temperature. This
action will eliminate the need to correct values for
temperature effects.
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