Techniques and Tips for Best Performance
DO
DO: (ISFET non-glass probe ONLY) Soak the probe in pH 7.00 buffer for
at least five minutes if the probe is new or has been stored dry for an extended
period. This will hydrate the sensor and dissolve any reference material,
which may have crystallized on the sensor surface.
DO: (ISFET non-glass probe ONLY) Clean the probe regularly with a
toothbrush and mild detergent.
DO: (ISFET non-glass probe ONLY) STORE THE PROBE DRY with the
black protective cap covering the probe tip. No electrode storage solution is
required.
DO: (BNC probe ONLY) Store the probe in electrode storage solution.
DO: Always begin each measuring session with a two-point calibration.
Update often with one-point or two-point calibrations.
DO: Use fresh buffers and deionized rinse solution.
DO: Use buffer solutions with pH values no greater than three pH units apart.
Buffers should bracket the anticipated values of the samples to be measured.
DO: Choose buffer solutions that most closely mimic the chemical nature and
conductivity level of the sample solutions to be measured.
DO: Use deionized water to rinse residual buffer and sample solutions from
the probe after calibration and measurement.
DO: Calibrate at the same temperature as the sample solution. Although the
meter has automatic temperature compensation, best results will be achieved if
the calibration buffers and sample are the same temperature.
DO: Keep the connectors clean and dry. Dirty or damp connectors can cause
unstable readings.
DO: Be sure the surface of the sensor in the probe is free from any deposits or
films. See the cleaning instructions in this manual.
DO: Contact IQ Scientific Instruments if your pH testing involves monitoring
small pH changes over time (i.e. titrations).
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