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PROPRIETARY AND CONFIDENTIAL DRAFT 28/Feb/03

Theory of Operation
Chapter 3: Theory of Operation

Theory of Operation

The MedPlus TotalAlert™ Alarm Network is a fully electronic monitoring
system. It monitors and displays the status of all piped gas and vacuum systems
that are in a typical healthcare facility by using Master Alarms, Area Alarms,
and Local Alarms that monitor the following:

• Medical gas and vacuum supplies
• Mainline pressure and vacuum

• Area zone pressure and vacuum
• Selected compressor operating conditions

• Selected vacuum pump operating conditions
• Selected manifold operating conditions 3

If the network communications option (alarm Web page accessibility) is
implemented; you can browse, download, configure, and troubleshoot Master
Alarms and Area Alarms with a personal computer that is either connected to
the facility’s Ethernet or connected to a serial port on your personal computer
(see “Configuring and Browsing the Master Alarm by Using the Web Pages”
on page 1-72). The alarm’s Web pages are built-in; no setup is required.

The Master Alarm can determine which Area Alarm Module or transducer has
an alarm by using their unique serial numbers, but the source equipment has to
be set up by the user.

All of the alarm conditions sent to the Master Alarm are logged onto the event
log and can be downloaded by using either the RS-232 communication
connector or the Ethernet connector on the Master Alarm Module (see
“Browse the Event Log” on page 1-99).

If the network communications option is not implemented, the Master Alarm
and Area Alarm work independently of one another. The Local Alarm is
always an independent component.

The Master Alarm monitors source equipment such as oxygen bulk supply,
oxygen and nitrous oxide manifolds, air compressors, and vacuum pumps. The
monitored signals are supervised in open-circuit loops.

MedPlus TotalAlert™ Alarm Network Operation and Maintenance Manual (man291ra) Page 3 - 3