User Guide

123

Phosphate HR

• Press ZERO and “SIP” will blink on the display.

• Wait for a few seconds and the display will

show "-0.0-". Now the meter is zeroed and

ready for measurement.

• Remove the cuvet.

• Add 10 drops of HI 93717A

Molybdate reagent.

• Add to the cuvet 0.5 mL of the

solution prepared in the HI

93717B bottle. Replace the cap

and mix the solution.

• Reinsert the cuvet 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

DIRECT. In both cases "SIP" will blink during measurement.

• The instrument directly displays concentration in mg/L of phos-

phate (PO

3–

) on the Liquid Crystal Display.

INTERFERENCES

Interference may be caused by:

Sulfide

Chloride above 150000 mg/L

Calcium above 10000 mg/L as CaCO

Magnesium above 40000 mg/L as CaCO

Ferrous iron above 100 mg/L

x 10