EN
Sample temperature needs to be below 30°C
Add 1 mL of sample to a photometer tube.
Fill to the 10 mL line with deionised water.
Use this to "blank" the instrument. Place in cell holder and press Blank.
Prepare sample by adding a Nitriphot No1 tablet. Then crush and stir.
Add a Nitriphot No2 tablet and crush vigorously, then stir.
Without delay, place tube in cell holder and press Measure.
Allow timer to count down 2 minutes. The concentration of Nitrite will then be displayed.
