VIASYS Vmax Encore, Техническое справочное руководство

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Technical Reference Manual
Vmax Encore
L2707
2–27
Chapter 2 System Description
PRESSURE BOARD
The Pressure Board is basically a mounting board for devices whose signals are processed on the
Mass Flow Sensor Board. The functions of the Pressure Board are listed below.
•
Houses the ambient temperature thermistor
•
Houses the direction (DIR) pressure sensor
•
Houses the mouth (PM) /sample pressure sensor
•
Busses the remote start signal to the Mass Flow Sensor Board
•
Houses solenoid 1 which acts as a solenoid shunt for the mouth (PM) or sample pressure
transducer
•
Houses solenoid 2, which switches between sampling gasses from the Breath-by-Breath
(BxB) port or Sample In (SI) port
•
Houses solenoid 3 which acts as a solenoid shunt for the direction (DIR) pressure trans-
ducer
SOLENOID BOARD
The Solenoid Board houses all the Pneumatics/Fan Assembly’s solenoids and regulators for Cal 1
and Cal 2 gasses. It busses all the solenoid drive signals from the Analyzer Control Board. It also
houses the. It busses drive signals for the Demand Valve Assembly. It also busses the variable
drive signal for the blower/fan and the Alarm from the Analyzer Control Board. The functions of the
solenoid valves are listed below.
•
Sol 1 Not Used
•
Sol 2 Not Used
•
Sol 3 Switches between Cal gas and INSP port
•
Sol 4 Switches from Cal gas/INSP (output of Sol 3) and DIL/MIX port (mixing chamber port
on side of blower/fan)
•
Sol 5 Switches between Hi and Low flow to the SO port
•
Sol 6 Switches to evacuate the Gas port
•
Sol 7 Provides drive gas to the Gas port balloon valve
•
Sol 8 Provides drive gas to the Spir port balloon valve
•
Sol 9 Provides drive gas to Sol 7 and Sol 8
•
Sol 10 Provides Cal 2 gas to Sol 3, BxB port, and the Cal Overflow port
•
Sol 11 Provides Cal 1 gas to Sol 3, BxB port, and the Cal Overflow port
•
Sol 12 Provides DL/O
2
gas to Sol 3, BxB port, and the Cal Overflow port
•
Sol 13 Switches to purge 3-Way Valve gas through the Test Mix port