Measurement Procedure
• Press the ON/OFF button to turn the checker
on. All segments will be displayed for a few
seconds, followed by “Add”
,
“C.1” with “Press”
blinking.
• Fill the cuvette with 10 mL of unreacted sample
and replace the cap. Insert the cuvette into the
checker and close the cap.
• Press the ON/OFF button. When the display
shows “Add”
,
“C.2” with “Press” blinking, the
checker is zeroed.
Note:
Any chlorine present in the sample
will interfere with the reading. To remove
the chlorine interference add one drop
of
HI93755-53
Chlorine Remover to the
unreacted sample.
• Remove the cuvette and unscrew the cap. Using
a 1 mL syringe carefully add exactly 1 mL of
HI775S
Alkalinity reagent
to the sample.
Replace
the cap and invert gently 5 times.
Note:
Pay attention not to spill reagent
otherwise full color development may be
inhibited.
• Insert the cuvette into the checker and close the
cap. Press the ON/OFF button. TThe instrument
displays the alkalinity concentration in ppm of
CaCO
3
. Alkalinity conversion:
1 ppm CaCO
3
= 0.02 meq/L
= 0.056 dkH
The checker automatically turns off 2 minutes
after reading.
×1
1 mL
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