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

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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 (6Pfc)
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. ORP and Free Chlorine Modes
The Ultrameter III features the ability to measure the activity of oxidizing
or reducing chemicals in solution as ORP mV and the level of residual
sanitizer as ppm free chlorine. mV and ppm free chlorine are the two
most commonly used sanitizer measurement units in water quality
management.
1. ORP Mode Selection
ORP mode selection allows the user to choose to display ORP readings
in either ORP millivolts (mV) or as converted to parts per million (ppm)
free chlorine. Use ORP to measure the effectiveness of all oxidizing
and reducing sanitizers, such as ozone, bromine and chlorine. Use Free
Chlorine in systems sanitized by chlorine only. To select between ORP
and Free Chlorine modes:
1.
Press .
2. Press and hold for approximately 3 seconds.
The current preference for ORP units of measure is displayed. Factory
setting for this preference is mV.