n
Reagent 2, indicator,
[HARDNESS 2]
n
Reagent 3, titration solution,
[HARDNESS 3]
1.
Fill the volumetric flask up to the 100 ml marking with the
softened water sample
ð
Take this water sample directly downstream of the water
softener.
2.
Add 2 full pipettes of
[HARDNESS 1] to the water sample.
ð
Shake the volumetric flask to mix the substances.
3.
Add 4 drops of
[HARDNESS 2] to the water sample.
ð
Shake the volumetric flask to mix the substances.
4.
Add one drop of
[HARDNESS 3] to the water sample.
ð
Shake the volumetric flask to mix the substances.
The contents of the flask will turn blue if the hardness is
correct and the water softener is suitable for further use.
Should the substance turn red, go to step 5.
5.
Regenerate the water softener. Repeat the water hardness
test after waiting for an hour.
Every 6 months:
n
Replace the water filter in the filter housing every six months or
if the water filter is brown.
n
Check the installed safety equipment, like drainage pipes and
ventilation to the outside, as well as other protection equip‐
ment.
10.2.4 Measuring the pH of the product
Measuring a fresh product is crucial for a correct assessment. The
pH determines the stability of the product. A pH between 9 ... 12
produces a stable product. A low pH can lead to a lower strength
product. The process water flow is measured. The system issues
an alarm and stops production if there is too great a deviation of
the process water flow. Apart from the pH value, temperature and
light, among other things, can affect stability. Take product from
the production tank. This sample can be used for the pH measure‐
ment. If the system is producing at the start of maintenance, a
good average value for the pH value can be obtained by taking a
sample from the product tank.
1.
Take a sample of the product from the product tank and
measure the pH value of the product.
2.
Note the pH value of the product on the maintenance
schedule.
10.2.5 Checking the brine tank
INFORMATION!: Check the brine tank before commencing mainte‐
nance.
1.
Check the volume of salt in the brine tank.
The brine tank should always be 2/3 filled with salt.
There should always be 1/3 water in the brine tank.
Procedure:
Maintenance checks and preparation for maintenance
58
Summary of Contents for Chlorinsitu-III
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