Accu-Chek Spirit User Manual page 58

Prepare the pump for use
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While holding steady pressure against the plunger rod
with your thumb, invert the insulin vial so that the
filling needle and cartridge are pointing upwards into
the insulin vial.
Make sure that the tip of the filling needle stays in the
insulin.
Slowly release the pressure against the plunger rod
and allow the insulin to flow into the cartridge.
Do not pull or push the plunger rod while it is moving
on its own (this would cause the formation of air
bubbles).
Slowly pull the plunger rod straight down to fill the
cartridge.
Remove any air bubbles by tapping on the cartridge to
dislodge them. Push the air bubbles back into the
insulin vial with the plunger rod.
The cartridge is completely filled when there are no
air bubbles in the cartridge and the plunger is at the
bottom of the cartridge.
Remove the filling needle from the insulin vial.