Lumiso
Pooltest
A Palintest Product
Blanking
The blank is a sample of the water to be tested that sets the
zero value on the instrument. This ensures that any colour or
cloudiness in the sample does not affect the final result.
Blanking is required whenever a different pool or spa is being
tested or if significant time has elapsed since the pool or spa
was last tested.
In the test instructions, blanking is not described specifically.
However, it is important that the photometer is blanked using
the water that is being tested.
If a result is above the range
of the test a ‘>’ symbol will
appear in front of the result.
In this case it will be necessary
to dilute the sample with
deionised water and repeat
the test.
Important: It is not valid to test
pH on diluted samples.
A dilution tube is available
from Palintest to simplify this.
Example for a x2 dilution:
Fill with sample to x2 line
and top up to 100 mL with
deionised water. Mix and use
this as the new blank and
sample for the test. Multiply
result by x2.
Sample Dilution
29
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