ISO-TEK Space Pressurization Monitor
Specifications
Velocity Range
-1000 to +1000 fpm, full scale range adjustable to +/- 100, 250,
500, or 1000 fpm
Pressure Range
-0.100 to +0.100 "wc, full scale
Accuracy
Pressure: +/- 2% of set range
Velocity: +/- 10 fpm
Analog Resolution
Pressure: 0.0001 "wc
Velocity: 1.0 fpm
Digital Resolution
+/- 0.5 fpm, +/- 0.00005 "wc
Airflow Polarity
Selectable for Positive, Negative, Neutral, or Standby
4-20mA Output
Self-powered, 500 load maximum, Neutral is 12mA
Power Supply
24VAC, +/- 4V, <10VA
Communications
RS-485, half duplex, Open Protocol, N2 compatible available
upon request
Alarm Contacts
SPDT, 0.5A max.
Guide Specifications
Provide as indicated on the accompanying plans, electronic room
pressure transmitters, for the purpose of continuously monitoring
the room pressures on all critical areas.
The room pressure monitor shall consist of a transmitter with two
room sensors that are connected between the room and referenced
area, which will allow a volume of transfer air to pass over the
bi-directional thermal mass air flow sensor. This volume of air,
equal to no more than 14 CCMs (cubic centimeters per minute), will
be scaled by the microprocessor to either a velocity (fpm) or room
pressure ("wc) signal.
The range of the monitor/transmitter shall be user configurable
either by a setup tool or by dip switches, and has selectable ranges
including +0.1 to -0.1, +0.01 to -0.10, +0.005 to -0.005, and +.001
to -.001"wc. The 4-20mA output shall be proportional to the scaled
range.
The alarming feature will have N.C. and N.O. contacts for a hardwire
connection to the BMS, and will have a local room pressure display
which has 7 LEDs that change color between red and green relative
to the room pressure and its alarm limits. The alarms can be
configured for either latching or non-latching.
The audible alarm horn will be provided and will sound when an
alarm condition occurs which exceeds the selected time delay
periods of either 15, 30, 60 or 120 seconds to allow for the opening
and closing of the door for normal traffic. Personnel may silence the
horn by pressing the mute button on the display that has a
configuration jumper to allow the horn to be deactivated if so
desired.
The room display monitor shall be mounted on a 2" x 4" handi-box
with screws. The display shall be capable of being mounted up to 50
feet from the transmitter if the setup tool connection port is utilized.
The LEDs shall be visible at an angle up to 90degrees from center
and from fifty feet away, to permit viewing from down the hallway.
Tek-Air Systems, Inc.
41 Eagle Road • Danbury, CT 06810 • (203) 791-1400 • FAX: (203) 798-6534 • SALES FAX: (203) 730-9564 • www.tek-air.com
T-Iso-Tek • 5-05
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