EN-27
Blood Glucose Measurement
Problem
Cause
What To Do
The device does not
display a message
after inserting a test
strip.
Batteries exhausted.
Replace the battery
immediately and reset date
and time on the meter setting.
Test strip inserted upside
down or incompletely.
Insert the test strip with
contact bars end first and
facing up.
Defective device or test
strips.
Please contact customer
service.
The test does not start
after applying the
sample.
Insufficient blood sample.
Repeat the test using a new
test strip with larger volume
of blood sample.
Sample applied after the
device is automatically
turned off.
Repeat the test with a new
test strip. Apply sample only
when flashing “ “ appears on
the display.
Defective device.
Please contact customer
service.
The control solution
testing result is out of
range.
Error in performing the test. Read instructions thoroughly
and repeat the test again.
Control solution vial was
poorly shaken.
Shake the control solution
vigorously and repeat the test
again.
Expired or contaminated
control solution.
Check the expiration date of
the control solution.
Control solution that is too
warm or too cold.
Control solution, device, and
test strips should be at room
temperature (20°C to 25°C /
68°F to 77°F) before testing.
Defective test strip.
Repeat the test with a new
test strip.
Device malfunction.
Please contact customer
service.
Summary of Contents for 4Sure Smart Duo
Page 1: ...Sure and Simple OWNER S MANUAL Blood Glucose Ketone Monitoring System IDEAL FOR...
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