User guide

14
• Remove the cuvette.
• Add the content of one packet of
HI 93707-0 Nitrite Low Range reagent.
Replace the cap and shake gently for
15 seconds.
• Replace the cuvette into the cuvette holder
and ensure that the notch on the cap is
positioned securely into the groove.
• Press and hold READ/ /TIMER for three
seconds. The display will show the
countdown prior to measurement. The
beeper is playing a beep at the end of
countdown period.
Alternatively, wait for 15 minutes and
just press READ/ /TIMER.
In both cases, the lamp, cuvette and
detector icons will appear on the display,
depending on the measurement phase.
• At the end of measurement, the
instrument directly displays concentration
in mg/L of nitrogen-nitrite (NO
2
¯-N) on
the LCD.
• To convert the NO
2
¯-N concentration to
the nitrite ion concentration (NO
2
¯),
multiply the reading by factor of 3.29.
• To convert the NO
2
¯-N concentration to
sodium nitrite concentration (NaNO
2
),
multiply the reading by factor of 4.93.