
STEP 2. Press the
button
While the “ ” symbol appears on the display, press the
button and then “CTL” will appear on the display. With
the “CTL” sign on the display, the meter will not store
your test result in memory. If you decide not to perform
a control solution test, press the button again, and the
“CTL” sign will disappear.
TD-4223
CODE
TD-4223
CODE
STEP 3. Obtain Control Solution
Shake the control solution vial well.
Remove the cap. Squeeze the vial,
discard the first drop, and wipe
off the dispenser tip to prevent
contamination. Squeeze the vial
again to get another drop and place
the drop on your fingertip first.
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