Technical data
138
Checking your meter
Farbe: P 021 – Prüfmittelnummer: 201
Have you observed the proper storage conditions for the 
meter, test strips and control solution (see Chapter 12 “Mea-
surement and storage conditions”, and the package inserts 
that came with the test strips and control solutions)?
yes
Are the test strip guide and measurement optics clean (see 
Chapter 9 “Cleaning your meter”)?
yes
Are the control solution and test strips past their expiry date 
(look next to the 
 symbol on the bottle and test strip con-
tainer label and look to see if exp is shown in the display)?
no
Has the control solution been open for less than three 
months? 
Once opened, control solutions are only stable for three 
months and must not be used after this period.
yes
If you have responded correctly to all these questions and still receive 
implausible results or error messages, please call your local customer 
support and service centre (see Chapter 19).
You may also receive implausible results or error messages if your 
meter has been dropped. In this instance, too, please call your local cus-
tomer support and service centre.










