Myron L TH1 - Manual (Page 12)

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IV. AFTER USING the TechPro II
A. Maintenance of the Conductivity Cell (TPH1& TP1)
Rinse out the cell cup with clean water. Do not scrub the cell. For oily films,
squirt in a foaming non-abrasive cleaner and rinse. (ref. Conductivity or
TDS, pg. 20). Even if a very active cbhemical discolors the electrodes,
this does not affect the accuracy; leave it alone.
B. Maintenance of the pH Sensor (TPH1 & TH1)
The sensor well must be kept wet with a solution. Before replacing the
rubber cap, rinse and fill the sensor well with Myron L pH Sensor Storage
Solution. If unavailable, use an almost saturated KCl solution, pH 4 buffer
(ref. pH Buffer Solutions, pg. 24) or a saturated solution of table salt and
tap water. NEVER USE DISTILLED WATER (ref. pH, pg. 20).
V. SPECIFIC RECOMMENDED MEASURING PROCEDURES
Verify proper solution setting (KCl, NaCl, or 442), (ref. Solution Selection, pg. 9).
NOTE: After sampling high concentration solutions or temperature
extremes, more rinsing may be required. When sampling low conductivity
solutions, be sure the pH cap is well seated so that no solution washes
into the conductivity cell from around the pH cap.
A. Measuring Conductivity & Total Dissolved Solids (TDS)
1. Rinse cell cup 3 times with sample to be measured. (This conditions
the temperature compensation network and prepares the cell.)
2. Refill cell cup with sample.
3. Press or .
4. Note value displayed.
B. Measuring pH (TPH1 & TH1)
1. Remove protective cap by squeezing its flat sides and pulling up.
2. Rinse sensor well 3 times with sample to be measured. Shake
out each sample to remove any residual liquid.
3. Refill both sensor wells with sample.
4. Press .
5. Note value displayed.