Interlock Mechanism; Delivery Of Gas/Agent Vapor; Overview - Datex-Ohmeda Tec 7 User's Reference Manual

Interlock mechanism

Delivery of gas/agent vapor

Overview

1175-0013-000
6 Principle of Operation
The vaporizer locking lever is interlocked with the vaporizer percentage control dial so
that the control dial release, located at the rear of the dial, cannot be actuated until
the vaporizer locking lever is in the locked position.
With the vaporizer locking lever in the locked position, the dial release can be pressed
in toward the dial to operate the interlock mechanism, which allows the manifold port
valves to open, prevents an adjacent vaporizer from being turned on, and allows the
vaporizer to operate.
Turning the control dial to
allows the dial release to move out to lock the dial in the
manifold port valves and vents the vaporizer gas connecting ports, and allows an
adjacent vaporizer to be turned ON.
Turning the locking lever to the unlocked position releases the vaporizer allowing it to
be removed from the manifold.
The output concentration of the Tec 7 Vaporizer is regulated by the 'variable flow-split'
method described in the following text and shown in figures 6-1 and 6-2.
A total flow of fresh gas from upstream flowmeters enters the vaporizer from the
flowmeter where it is immediately split into two streams. One stream flows into the
fresh gas bypass circuit and the other stream flows through the vaporizing chamber
where it is enriched with the vapor of the liquid anesthetic agent.
automatically reverses the operating sequence, which
position, closes the
6-1