Hanna Instruments HI 83099 - Manual (Page 45)

89 88 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 ▲ or ▼ 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 ▲ or ▼ to return to the measurement screen.
Nitrite HR
NITRITE HIGH RANGE
SPECIFICATIONS
Range 0 to 150 mg/L
Resolution 1 mg/L
Accuracy ±4 mg/L ±4% of reading at 25 °C
Typical EMC ±1 mg/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 575 nm
Method Adaptation of the Ferrous Sulfate method. The reaction between nitrite and the
reagent causes a greenish-brown tint in the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93708-0 Powder reagent 1 packet
REAGENT SETS
HI 93708-01 Reagents for 100 tests
HI 93708-03 Reagents for 300 tests
For other accessories see page 132.
MEASUREMENT PROCEDURE
• Select the Nitrite HR 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 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.
10 mL