Hanna Instruments HI 95715 - Manual (Page 14)

14
• Replace the cuvet into the holder and ensure
that the notch on the cap is positioned securely
into the groove.
• Hold READ/TIMER for three seconds. The
display will show the countdown prior to
measurement.
Alternatively, wait for 3 minutes and 30 seconds
and just press READ/TIMER.
In both cases “SIP” will blink during
measurement.
• The instrument directly displays concentration
in mg/L of ammonia nitrogen (NH
3
-N) on the
Liquid Crystal Display.
• To convert the reading to mg/L of ammonia
(NH
3
), multiply by a factor of 1.216.
or
INTERFERENCES
• Organic compounds like: chloramines, various aliphatic and aromatic amines, glycine,
(positive error).
To eliminate these interferences distillation is required.
• Organic compounds like: aldehydes, alcohols (e.g. ethanol) or acetone (negative error).
To eliminate these interferences distillation is required.
• Sulfide (S 2- ): may cause turbidity.
• Hardness above 1 g/L as Calcium Carbonate (CaCO
3
).