Roche Accu-Chek Performa Manuel De L'utilisateur page 30

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8. Press and release
level in the meter.
9. " OK" and the control result alternate
on the display if the result is in range.
The range is printed on the test strip
(example)
to set the control
(example)
container label. "Err" and the control
result alternate on the display if the
result is out of range. Remove and
discard the used test strip per facility
policy.