Hanna Instruments HI 83215 - Manual (Page 45)

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• Press the Zero key. The display will show “-0.0-” when the meter is zeroed and ready for measurement.
• Remove the cuvette and add the content of one packet
of HI 93750B-0 reagent. Replace the cap and gently mix
for one minute by slowly turning the cuvette upside down.
• Reinsert the cuvette into the instrument.
• Press Timer and the display will show the countdown prior
to the measurement or, alternatively, wait for 2 minutes
and press Read. When the timer ends the meter will
perform the reading. The instrument displays the results in
mg/L (ppm) of potassium (K).
• Press or to access the second level functions.
• Press the Chem Frm key to convert the result in mg/L of potassium oxide (K
2
O).
• Press or to return to the measurement screen.
INTERFERENCES
Interferences may be caused by:
Ammonium above 10 ppm
Calcium above 10000 ppm as CaCO
3
Chloride above 12000 ppm
Magnesium above 8000 ppm as CaCO
3
Sodium above 8000 ppm
Potassium MR