User Manual

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SPECIFICATIONS
Range 0.00 to 1.15 mg/L
Resolution 0.01 mg/L
Accuracy ±0.06 mg/L ±4% of reading at 25 °C
Typical EMC ±0.01 mg/L
Deviation
Light Source Tungsten lamp with narrow band interference filter @ 525 nm
Method Adaptation of the EPA Diazotization method 354.1 . The reaction between nitrite and
the reagent causes a pink tint in the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93707-0 Powder reagent 1 packet
REAGENT SETS
HI 93707-01 Reagents for 100 tests
HI 93707-03 Reagents for 300 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
• Select the Nitrite LR method using the procedure described
in the Method Selection section (see page 12).
• Fill the cuvette up to the mark 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 93707-0 reagent.
Replace the cap and shake gently for about 15 seconds.
Nitrite LR
NITRITE LOW RANGE
Nitrite HR
• Add the content of one packet of HI 93708-0 reagent.
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 10 minutes and press Read. When the timer ends the meter will perform the reading. The
instrument displays concentration in mg/L of nitrite.
• Press s or t to access the second level functions.
• Press the Chem Frm key to convert the result in mg/L of nitrogen-nitrite (NO
2
¯-N) and sodium nitrite
(NaNO
2
).
• Press s or t to return to the measurement screen.
10 mL