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2.1.7 EFCS flowmeter system
2.1.7.1 EFCS VCM
The EFCS VCM is the core control component of the EFCS on the anesthesia machine. The EFCS
VCM controls the oxygen, nitrous oxide and air flow by regulating the proportional valves, and
monitors and feeds back the oxygen, nitrous oxide and air flow by using a flow sensor. In addition,
the EFCS VCM can identify the switch of the backup flowmeter system and control the backlight.
The EFCS VCM communicates with the main control board through the serial port.
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