User Manual

102 103
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 s or t to access the second level functions.
Press the Chem Frm key to convert the result in mg/L of phosphorus (P) and phosphorus pentoxide
(P
2
O
5
).
Press s or t to return 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 at 25 °C
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 93717A-0 Molybdate 10 drops
HI 93717B-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 128.
MEASUREMENT PROCEDURE
Select the
Phosphate HR
method using the procedure described
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 the 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