Chapter 2 - Description of Components

31 - Alarm Time

Delay Relay

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.

Figure 25. Alarm Time Delay Relay

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.

22

SSCI - Suburban Surgical Company, Inc.

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Suburban Mfg 12019-01-NGFREP manual Alarm Time Delay Relay, Main Terminal Block Oxygen Sensor/ Fuel Cell
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12019-01-NGFREP specifications

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