Hanna Instruments HI 83203, Instruction Manual

Page: 17 / 25

32 33
Nitrite HR
• 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 the or to access the second level of functions.
• Press the Chem Frm functional key to convert the result in mg/L of nitrogen-nitrite (NO
2
–
-N) and sodium
nitrite (NaNO
2
).
• Press the or to go back 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
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 46.
MEASUREMENT PROCEDURE
• Select the
Nitrite HR
method using the procedure described
in the Method Selection section (see page 11).
• 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 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 93708-0 reagent.
Replace the cap and shake gently until completely dissolved.
10 mL