21
METHOD PROCEDURE
• Insert the cuvette into the holder and ensure that the
notch on the cap is positioned securely in the groove.
• Press
Read
and the display will show a 5 minute countdown prior to the measurement.
To skip the timer, press
Read
twice. When the timer ends the meter will perform the
reading. The instrument displays the results in
mg/L
of
phosphorus (P).
• Press the
key and use the functional keys to select
Chemical Form
.
• Use the functional keys and press
Select
to change the displayed chemical formula
to
mg/L
of
phospate (PO
4
3
¯)
and
phosphorus pentoxide (P
2
O
5
).
INTERFERENCES
Interference may be caused by:
• Sulfide
• Chloride above 150000 mg/L
• Magnesium above 40000 mg/L CaCO
3
• Calcium above 10000 mg/L CaCO
3
• Iron (Ferrous) above 100 mg/L
