165
PHOSPHA
TE LOW RANGE
• 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 press
Read.
When the timer ends the meter will perform the reading. The
instrument displays concentration in
mg/L of phosphate (PO
4
3
¯).
• Press
or
to access the second level functions.
• Press the
Chem Frm
key to convert the result to
mg/L of phosphorus (P) and phosphorus
pentoxide (P
2
O
5
).
• Press
or
to return to the measurement screen.
INTERFERENCES
Interference may be caused by:
Iron above 50 mg/L
Silica above 50 mg/L
Silicate above 10 mg/L
Copper above 10 mg/L
Hydrogen sulfide, arsenate, turbid sample and highly buffered samples also interfere.