Terumo BCT Trima Accel, Руководство по обслуживанию

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Valve System
The valve system operates by rotating valves in the valve assembly to pinch tubing closed between the
valve post bearing and the valve housing.
Each valve motor rotates the valve post to one of three positions: right, center, or left. When the valve
post is in the right or left position, it is pinching a section of the disposable tubing set between the valve
post bearing and the valve housing, which closes that part of the disposable tubing set. When the post is
in the center position, both sections of tubing are open. Only one valve moves at a time.
Figure 2-24: Valve system block diagram
Prerequisites
The valve system must meet the following electronic prerequisites for normal operation:
•
24 V DC source from the power supply must be within a 19.2 V DC to 28.8 V DC range
• 24 V DC switched from the motor driver CCA must be within a 19.2 V DC to 28.8 V DC range
• Safety CCA reset of 24 V shutdown (digital) indicates run or no reset (low)
• Safety CCA must activate the 24 V DC switch (digital) on the motor driver CCA
Valve System
Trima Accel
®
Automated Blood Collection System • Service Manual 2-31