18
Alternatively, wait for 3 minutes and 30 seconds and just press
READ /TIMER.
In both cases, the lamp, cuvette and detector icons will appear on the display, depending on
the measurement phase.
• At the end of measurement, the instrument directly displays concentration in mg/L of ammonia
nitrogen (NH
3
‑N) on the LCD.
• To convert the reading to mg/L of ammonia (NH
3
), multiply by a factor of 1.216.
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
).
MEASUREMENT PROCEDURE
