Lovibond Maxi Direct, Инструкция по эксплуатации, Страница: 39 / 268

37
MaxiDirect_2c 03/2010
1.1 Methods
13. Close the vial tightly with the cap and swirl several times
to mix the contents (approx. 20 seconds).
14. Place the ammonia vial in the sample chamber making
sure that the marks are aligned.
15. Press TEST key.
Wait for a reaction period of 5 minutes .
After the reaction period is finished the measurement
starts automatically.
The result is shown in the display in mg/l Monochlor-
amine and mg/l free Ammonia.
The reading of Monochloramine is shown as:
mg/l Cl
2
mg/l NH
2
Cl
mg/l N
The reading of Ammonia is shown as N.
Conversion:
mg/l NH
4
= mg/l N · 1.29
mg/l NH
3
= mg/l N · 1.22
Notes:
1. Hold the bottle vertically and squeeze slowly.
2. To determine the ammonia concentration the difference between the chloramine (T1)
and the sum of chloramine and ammonia (T2) is calculated. If T2 exceeds the range limit
the following message is displayed:
NH
2
Cl + NH
4
> 0.5 mg/l
In this case the sample has to be diluted and the measurement repeated.
3. see also page 34
T1 accepted
prepare T2
press TEST
Countdown
5:00
*,** mg/l N [NH4]
*,** mg/l Cl2
*,** mg/l NH2Cl
*,** mg/l N [NH2Cl]