D-Tec Vaporizer
Page 5
O & M Manual Part No. 1107-0622-000
August 2001
2.2.5
Equi-Potential Stud
The equi-potential stud
Y
is located on the top of the vaporizer. It provides a means of connecting a
vaporizer to the anesthesia system to minimize any electrical potential difference between the vaporizer
casing and the anesthesia system.
2.2.6
Sump
The sump provides a means of containing the agent and includes the agent filling port, the drain, the
heaters and the agent level sensor.
The sump has a total nominal capacity of 390 milliliters (ml) which consists of a nominal 330 ml indicated
volume and a nominal 60 ml reserve.
2.2.7
Heater Elements
Two 100W heater elements, located in the base of the sump, heat the agent to a nominal 39
°
C (102
°
F) to
generate the working pressure.
Two 100W heater elements located in the upper part of the vaporizer help to prevent condensation of the
anesthetic agent in the vaporizer.
The current supplied to power the heaters alternates between the two heaters in the sump and the two
heaters in the upper part of the vaporizer. This minimizes the current requirement.
The casing of the vaporizer is normally warm to the touch while it is connected to the electrical supply.
2.2.8
Monitors
Electro/mechanical monitors are incorporated to monitor the fresh gas/agent vapor pressure balance and
the agent volume.
The monitors control the operational status display and activate the appropriate alarm indication if a
monitored parameter malfunction is detected.
2.2.9
Agent Level Sensor
An agent level sensing probe is mounted in the sump to measure the agent level. When the sump contains
between 60 and 390 ml of agent, the LCD level display indicates the level of agent in the sump. If the agent
level decreases below 60 ml, the amber LOW AGENT light on the display panel flashes and the auditory
alarm is activated. If the agent level decreases below approximately 20 ml,
the red NO OUTPUT light flashes and the auditory alarm is activated. Vapor output then ceases.
2.2.10
Tilt Switch
If the vaporizer is tilted for 10-15 seconds while it is in operational mode and delivering vapor, vapor
delivery will be stopped, as indicated by the flashing No Output light and auditory alarm.
