62
63
Phosphate HR
• Add the content of one packet of HI 93717B-0 Phosphate
HR Reagent B to the cuvette. Replace the cap and shake
gently until completely dissolved.
• Reinsert the cuvette into the instrument.
• Press TIMER and the display will show the countdown prior
to the measurement or, alternatively, wait for 5 minutes
and press READ. When the timer ends the meter will
perform the reading. The instrument displays the results in
mg/L of phosphate (PO
4
3-
).
• Press the
or
to access the second level of functions.
• Press the
Chem Frm
functional key to convert the result in mg/L of phosphorus (P) and phosphorus
pentoxide (P
2
O
5
).
• Press the
or
to go back to the measurement screen.
INTERFERENCES
Sulfide
Chloride above 150000 mg/L )
Calcium above 10000 mg/L as CaCO
3
Magnesium above 40000 mg/L as CaCO
3
Ferrous iron above 100 mg/L
Phosphate HR
PHOSPHATE HIGH RANGE
SPECIFICATIONS
Range
0.0 to 30.0 mg/L
Resolution
0.1 mg/L
Accuracy
±1 mg/L ±4% of reading
Typical EMC Dev.
±0.1 mg/L
Light Source
Tungsten lamp with narrow band interference filter @ 525 nm
Method
Adaptation of the
Standard Methods for the Examination of Water and Wastewater,
18
th
edition,
Amino Acid method. The reaction between phosphate and reagents
causes a blue tint in the sample.
REQUIRED REAGENTS
Code
Description
Quantity
HI 93717
A
-0
Molybdate
10 drops
HI 93717
B
-0
Reagent B
1 packet
REAGENT SETS
HI 93717-01
Reagents for 100 tests
HI 93717-03
Reagents for 300 tests
For other accessories see page 73.
MEASUREMENT PROCEDURE
• Select the
Phosphate HR
method using the procedure de-
scribed in the
Method Selection
section (see page 12).
• Fill the cuvette with 10 mL of unreacted sample (up to the
mark) and replace the cap.
• Place the cuvette into the holder and close the lid.
• Press ZERO key. The display will show “-0.0-” when the meter
is zeroed and ready for measurement.
• Remove the cuvette.
• Add 10 drops of HI 93717A-0 Molybdate reagent.
10 mL
x 10
