Applications; Basic Operation; Pressurization Modes - Siemens 125-2134 Owner's Manual

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Applications

Basic Operation

The DPM provides technology for monitoring differential pressure between a room and an
adjacent space (anteroom). The DPM displays the pressurization mode, the differential
pressure (optional) and all alarms, and the differential pressure of the anteroom. Each of the
alarms is annunciated by a horn.
Application 701 and 702 help healthcare facilities meet the Center for Disease Control's
recommendations for hospital isolation rooms. One or two Remote Pressure Transmitter(s)
(RPT) are wired to the DPM and measures the differential pressure between each isolation
room and the adjacent space.
In Application 703 and 704 are used in Laboratories, the Differential Pressure Monitor (DPM)
monitors the differential pressure of an occupied room and the anteroom. The DPM also
monitors the occupied room's entry door position (optional). One or two Remote Pressure
Transmitter(s) (RPTs) are wired to the DPM and measure the differential pressure between
each room and its adjacent space.

Pressurization Modes

The DPM has three pressurization modes; the active mode is displayed in the DPM's LCD.
Protective Isolation/Positive Pressurization – The DPM expects to detect air leaving the
patient room. This is achieved by supplying more air to the room than is being exhausted so
that contagious airborne pathogens are prevented from entering the room. The DPM monitors
the differential pressure, measured by the RPT, and compares it to the user-defined positive low
pressure limit. An alarm condition is created when the differential pressure falls below this limit.
Infectious Isolation/Negative Pressurization – The DPM expects to detect air entering the
patient room. This is achieved by exhausting more air from the room than is being supplied
so that contagious airborne pathogens are prevented from leaving the room. The DPM
monitors the differential pressure, measured by the RPT, and compares it to the user-defined
negative high pressure limit. An alarm condition is created when the differential pressure
becomes less negative than this limit.
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