Terumo 801763, Operator'S Manual, Page: 39 / 359

System Overview
2-18
Electronic Gas Blender
The electronic gas blender is a module that is internally installed in the system base.
The gas blender provides control and monitoring of the gas output to an oxygenator.
An integrated oxygen analyzer measures the oxygen content of the gas blend.
The oxygen analyzer requires, at a minimum, daily calibration and can be calibrated
from the Central Control Monitor.
An air or 95% oxygen/5% carbon dioxide (95/5) inlet, an oxygen inlet, a gas outlet,
and an exhaust port are on the back of the system base. Use only medical grade
gases supplied at an inlet pressure of 50 psi ± 20 psi with the difference between the
two inlet gas pressures being no more than 18 psi.
The gas blender can be controlled from the Central Control Monitor by using the Gas
and FiO
2
slide bars or locally by using the control knobs on the front of the base. Gas
flow information is displayed on icons labeled Gas, %O
2
and FiCO
2
, if appropriate, on
the Perfusion Screen. An external, mechanical flowmeter, provided in the accessory
kit, should be connected to the gas outlet and be positioned between the vaporizer
and the oxygenator to monitor the gas flow in the event Central Control Monitor
capability is lost.
An alarm limit for Low FiO
2
can be chosen during case setup.
High and low pressure alarms are generated by the system if the inlet pressure of a
source gas exceeds 70 psi or falls below 30 psi. In the event of a pressure alarm, a
dual tone audible alarm sounds and an alarm message is displayed on the Central
Control Monitor.
Electronic Gas Blender
Controls
Front Panel Back Panel
Water trap