User Manual

76 77
Manganese HR
Add the content of one packet of HI 93709B-0 Sodium
Periodate reagent. Replace the cap and invert to mix with
gently movements for 2 minutes.
Reinsert the cuvette into the instrument.
Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait
for 1 minute and 30 seconds and press Read. When the timer ends the meter will perform the reading.
The instrument displays the results in mg/L of manganese.
Press s or t to access the second level functions.
Press the Chem Frm key to convert the result in mg/L of potassium permanganate (KMnO
4
) and
permanganate (MnO
4
).
Press s or t to return to the measurement screen.
INTERFERENCES
Interference may be caused by:
Calcium above 700 mg/L
Chloride above 70000 mg/L
Iron above 5 mg/L
Magnesium above 100000 mg/L.
SPECIFICATIONS
Range 0.0 to 20.0 mg/L
Resolution 0.1 mg/L
Accuracy ±0.2 mg/L ±3% of reading at 25 °C
Typical EMC ±0.1 mg/L
Deviation
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,
Periodate method. The reaction between manganese and reagents causes
a pink tint in the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93709A-0 Citrate 1 packet
HI 93709B-0 Sodium periodate 1 packet
REAGENT SETS
HI 93709-01 Reagents for 100 tests
HI 93709-03 Reagents for 300 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
Select the
Manganese 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 the content of one packet of HI 93709A-0 Citrate
reagent. Replace the cap and invert to mix with gently
movements for 2 minutes.
Manganese HR
MANGANESE HIGH RANGE
10 mL