44
45
Iron HR
• Reinsert the cuvette into the instrument.
• 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 iron.
INTERFERENCES
Interference may be caused by:
Molybdate Molybdenum above 50 ppm
Calcium above 10000 ppm (as CaCO
3
)
Magnesium above 100000 ppm (as CaCO
3
)
Chloride above 185000 ppm.
Iron HR
IRON HIGH RANGE
SPECIFICATIONS
Range
0.00 to 5.00 mg/L
Resolution
0.01 mg/L
Accuracy
±0.04 mg/L ±2% of reading
Typical EMC
±0.01 mg/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 525 nm
Method
Adaptation of the
EPA Phenantroline method 315B,
for natural and treated waters.
The reaction between iron and reagents causes an orange tint in the sample.
REQUIRED REAGENTS
Code
Description
Quantity
HI 93721-0
Powder Reagent 1 packet
REAGENT SETS
HI 93721-01
Reagents for 100 tests
HI 93721-03
Reagents for 300 tests
For other accessories see page 73.
MEASUREMENT PROCEDURE
• Select the
Iron 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 ZERO key. The display will show “-0.0-” the meter is
zeroed and ready for measurement.
• Remove the cuvette and add the content of one packet of
HI 93721-0 reagent. Replace the cap and shake until
dissolution is complete.
10 mL