Technical data

136
Checking your meter
137
Checking your meter
7
 Subsequently hold the meter directly above a waste bin with the test
strip pointing downwards.
 Press the Test button to turn the meter off.
The used test strip drops out.
Before the meter turns off, it shows you the number of test strips
remaining in the drum (see Chapter 2.3.2).
 Wipe the tip of the dropper with a clean, dry paper towel and close
the bottle tightly.
Notes
i
The control solution you apply to a washable object must come
from a suspended drop. Do not use the drop if it has run down
the outside of the tip of the dropper. This may lead to results that
are too high.
i
Control solution that is to be drawn up by the test strip must just
have been freshly applied to the object. The control solution must
not be left exposed on the surface for any length of time, or it
may give results that are too high.
i
Results flagged as performance checks with the bottle symbol
are not included in the calculation of averages and lowest and
highest results.
i
You can dispose of empty or only partly used bottles of control
solution together with your regular household waste.
Please refer also to the notes in Chapters 4.3 and 4.4.
7.3 Possible causes of error during the performance of perfor-
mance checks
If the result is outside the stated concentration range, perform a second
performance check. If the result of this second check is outside the con-
centration range as well, please check the following points:
Did you perform the performance check as described above? yes
Did you wipe the tip of the dropper before you applied control
solution to the surface of the washable object?
yes
Did you use a suspended drop of control solution? yes
Was there prolonged contact between the control solution and
the washable object?
no
Did you bend the test strip either before or while you were
drawing up control solution?
no
Did you wait for the test strip symbol and drop symbol to flash
in the display before drawing up control solution with the test
strip?
yes