14
C. 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.
Take reading. A display of [- - - -] indicates an overrange
condition.
D. 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:
[ - - - - ]. Measure solution Conductivity instead.
E. Measuring Alkalinity
Prepare the materials required for titration: Reagent: A1, cell extender,
T-plunger, and 100µL pipette with a clean tip installed.
NOTE: If you do not complete each titration point within the 3-minute
timeout period, the unit exits the Alkalinity function. Start the titration
process over.
If you make a gross error in your titration method, e.g., you forget to add
sample to the cell, “Err” will display. Start the titration over.
1.
Ensure pH protective cap is secure to avoid contamination.
2.
Install the cell extender by pushing the base of the cell extender
into the conductivity cell until it is fully seated.
3.
Rinse the conductivity cell cup and cell extender 3 times with
solution to be measured.
4.
Refill cell cup and cell extender with sample solution.
5.
Insert T-plunger into open cell extender until the “T” rests flush
on the lip of the cell extender. This will cause fluid beyond what
is required for titration to overflow the cell extender.
Summary of Contents for POOLPRO PS9TKB
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