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DISPLAY MESSAGES
„ CAL Reminder
When the TRACER is turned on for the 15th time, without recalibration the
CAL icon will appear on the display indicating the the TRACER may require
calibration. Some applications may require recalibration of the electrode
sooner than others. The
electrode is recalibrated.
„ RENEW
A flashing "RENEW" warning indicates that the probe may be nearing the end
of its useful life. If cleaning or recalibration does not cause the
disappear, replace the electrode (see optional accessories). The
appears when the output of the pH electrode fails a diagnostic test.
pH TESTING
pH is a unit of measure (ranging from 0 to 14 pH) indicating the degree of
acidity or alkalinity of a solution. pH tests are the most commonly performed
measurements in water analysis, using the negative log of the hydrogen ion
activity of a solution which is an indicator of acidity or alkalinity. Solutions with
a pH of less than 7 are considered acidic, solutions with a pH of higher than
7 are known as bases, and solutions with a pH of exactly 7 are considered
neutral.
The pH scale is logarithmic, so, for example, if Sample A is 1 pH less than
Sample B, this means that sample A is 10 times more acidic than Sample B.
A difference of 1 pH represents a ten-fold increase or decrease in acidity.
„ pH Display
When the electrode is placed in a solution, the main display and bar graph will
indicate the pH reading while the lower display will read temperature. Readings
flash until they have stabilized. The bar graph is 'center zero', i.e. at pH 7 there
is no display. As the pH rises, the bar will move from the center to the right. If
the pH drops, the bar will move from the center to the left.
„ Getting Started
1. Remove the cap from the bottom of the TRACER to expose the electrode
glass surface and reference junction.
2. Before first use or after storage, soak the electrode (with cap removed) in a
pH 4 buffer or tap water for 10 minutes.
3. Before first use, hold the meter by the top battery compartment and swiftly
tap the back of the meter downward into your palm (not a hard surface).
This assures that the internal electrolyte solution moves to the very tip of
the electrode. The electrolyte should fill the circular junction window at the
tip of the electrode.
4. White KCl crystals may be present in the cap. These crystals will dissolve in
the soak or they can be rinsed off with tap water.
CAL display is a reminder and will turn off when the pH
4
Renew icon to
Renew display
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