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22 SSCI - Suburban Surgical Company, Inc.
Chapter 2 - Description of Components
The time delay relay (Figures 23 and 25) determines how soon the
alarm will go off after a malfunction of the oxygen system occurs.
The relay controls the delay time from two to 300-
seconds (five minutes). We recommend a time
delay of about 30-seconds. This gives you ad-
equate warning of problems in the oxygen system
without alerting you to every minor, transient fault.
To reset the time delay, refer to Setting the Alarm
Time Delay Relay on Page 59.
32 - Main Terminal
Block
33 - Oxygen Sensor/
Fuel Cell
The main terminal block (Figures 23 and 26) is the primary junction
and distribution point for most of the electrical wiring in the Inten-
sive Care Unit.
The oxygen sensor (Figures 23 and 26) is located in the partition
wall between the electronics compartment and the filter/fans com-
partment. It senses the concentration of oxygen in the filter/fans
compartment and sends this information to the oxygen concentra-
tion meter for display. Also, refer to Figure 29.
The fuel cell powers the black calibration needle in the oxygen
concentration meter. The cell has an average life of about one year,
depending on frequency of use. Difficulty in moving the black
calibration needle is usually an indication of an exhausted fuel cell.
Order replacements from SSCI, Part Number 853396. For
information on replacing the fuel cell, refer to Replacing the Fuel
Cell on Page 68.
CAUTION: Before handling the fuel cell, please read
Fuel Cell Warnings on Page 4.
31 - Alarm Time
Delay Relay
Figure 25. Alarm Time Delay Relay