Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual
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255098 (Rev.8) 07/08
Page 9
2.3 Area Alarm Panel
The Area Alarm Panel provides a digital display of the actual gas
line pressure or vacuum being monitored. The module has three
different color trend lights to indicate three different conditions of
the gas pressure. These colors are green, yellow and red for
normal, caution, and high or low pressure indications
respectfully. The trend lights and how they correspond to range
in pressure is explained in more detail while programming in
Chapter 5.2 on page 21. When an alarm detects a “LOW” or
“HIGH” condition the corresponding red LED on the Area Alarm
Panel will be illuminated and an audible alarm will sound from
the Annunciator Panel. The red LED will stay illuminated until the
alarm condition has been corrected and the “Reset” button is
pressed.
The two LED’s above the colored trend lights indicates which
unit of measure is being displayed. The units are English
(Standard) or Metric units for pressure or vacuum accordingly
and can be changed to whichever units when programming.
The Area Alarm Module has dry contacts on the backside to
connect to a pair of contacts on a Master Alarm Module for
remote monitoring purposes.
2.4 Master Alarm Panel
The Master Alarm Panel monitors dry contacts from source
equipment or area alarm panels. Each individual Master Alarm
Panel can monitor up to 10 signals. Each pair of contacts is
either configured for normally open or normally closed operation.
The default mode is normally closed per NFPA code. The
Master Alarm panel may be easily labeled to indicate each of the
conditions being monitored. A Dry Contact Master Alarm Module
is also available for computer interface or service to a building
management system.
In operation, the unit continuously monitors for alarm conditions.
Except for the green “POWER” indicator, all Master Alarm Panel
LED lamps will be off when there are no alarm conditions
present. When an alarm condition is detected, the
corresponding LED on the Master Alarm Panel will flash and the
audible alarm from the Annunciator Panel will sound. The LED
will continue to flash until the alarm condition has been corrected
and the alarm has been reset. If two or more alarm condition
occur at the same time, the most recent alarm will flash and the
other existing alarms will remain in constant illumination. Any
alarm will remain lighted until the respective alarm condition has
been corrected and the alarm has been reset.
