Plunger Assembly - Medtronic ACT Plus Manual Del Usuario

Plunger Assembly

The plunger assembly consists of the "daisy", the plunger and the "flag".
The "daisy" provides the upper seal for the reagent chamber and is the mechanical
sensing element for the formation of a clot. As the plunger rises and falls, the
"daisy" moves up and down through the test sample/reagent mixture. Clot
formation impedes the movement of the "daisy" through the sample.
The "flag" is located at the top of the plunger. A photo-optical system senses motion
of the plunger tang through the reaction mixture. When a decrease in the plunger's
fall rate is detected, the timer stops and the clotting time results are displayed.
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ACT Plus Operator's Manual English 15