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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.
• Add 4 drops of HI93733A‑0 Ammonia High Range Reagent A.
Replace the cap and swirl the solution.
• Reinsert the cuvette into the instrument and close the lid.
• Press Timer and the display will show the countdown prior to the measurement or, alternatively,
wait for 3 minutes and 30 seconds and press Read. When the timer ends the meter will perform
the reading. The instrument displays the results in mg/L of ammonia nitrogen (NH
3
-N).
• Press or to access the second level functions.
AMMONIA HIGH RANGE
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