Myron L 6Psi and 4P - Manual (Page 14)

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B. Measuring Resistivity
Resistivity is for low conductivity solutions. In a cell cup the value may
drift from trace contaminants or absorption from atmospheric gasses, so
measuring a flowing sample is recommended.
1.
Ensure pH protective cap is secure to avoid contamination.
2. Hold instrument at 30° angle (cup sloping downward).
3. Let sample flow continuously into conductivity cell with no aeration.
4. Press key; use best reading.
NOTE: If reading is lower than 10 kilohms display will be dashes:
[ - - - - ]. Use Conductivity.
C. Measuring pH (6Psi)
1. Remove protective cap by rotating while grasping and pulling up.
2. Rinse pH/ORP sensor well and conductivity cell cup 3 times
with sample to be measured. Shake out each sample to
remove any residual liquid.
3. Refill both sensor well and cell cup with sample.
4. Press .
5. Note value displayed.
6. IMPORTANT: After use, fill pH/ORP sensor well with Myron L
pH Sensor Storage Solution and replace protective cap.
If Myron L pH Sensor Storage Solution is unavailable, use a
strong KCl solution, a pH 4 buffer, or a saturated solution of
table salt and tap water (ref. Cleaning Sensors, 2. pH/ORP, pg.
32). Do not allow pH/ORP sensor to dry out.
D. Measuring ORP (6Psi)
1. Remove protective cap by rotating while grasping and pulling up.
2. Rinse sensor well and cell cup 3 times with sample to be
measured. Shake out each sample to remove any residual liquid.
3. Refill both sensor well and cell cup with sample.
4. Press .
5. Take reading.
NOTE: When ppm free chlorine units are selected (ref. free chlorine
feature, pg. 48), annunciators alert you when the concentration is outside
the specified measurement range. “Or” (over range) will display when the