Installation and Operating Instructions
CO
2
Room Sensor in the BAPI-Stat 3 Enclosure
with Common Ground Configuration
Specifications subject to change without notice.
26141_ins_room_CO2
1 of 6
rev. 04/27/18
Fig. 1:
BAPI-Stat 3 Room CO
2
Sensor
The BAPI CO
2
Sensor is an accurate and reliable way of incorporat-
ing demand controlled ventilation into a building’s HVAC strategy. It
measures the CO
2
in a range of 0 to 2,000 ppm with a field selectable
output of 0 to 5 or 0 to 10 VDC.
The non-dispersive infrared (NDIR) technology has been optimized
to reduce drift. The sensor is also altitude compensated for long-
term accuracy and stability. Changing air pressure, due to altitude
or weather patterns, can change the output of most CO
2
sensors by
as much as 17%. The BAPI unit has a built-in barometric sensor that
continuously compensates the output for accurate readings despite
inclement weather or the altitude of the installation.
The unit can be ordered as CO
2
alone, or with optional temperature
sensing, temperature setpoint, occupant override and humidity sens-
ing. The large format display is easy to read and alternates between
the measured values (CO
2
, Temperature or Humidity). The display is
also field adjustable between °F or °C and all the displayed values
may be turned on or off by an HVAC technician.
Optional indication of the CO
2
level as “Good, Fair or Poor” is avail-
able as a three-color LED on the unit or as an arrow on the display.
Identification and Overview
Specifications
Power for 0 to 5 VDC Outputs:
9 to 35 VDC @ 240mA (9 to 24 VDC recommended)
Power for 0 to 10 VDC Outputs:
15 to 35 VDC @ 240mA (15 to 24 VDC recommended)
Sensing Elements:
CO
2
– Single Beam Non-Dispersive Infrared (NDIR)
or Dual Channel NDIR for “24/7” Model
Humidity – Capacitive Polymer ±2% RH Accuracy
Temperature Sensor:
Thermistor, RTD or Semiconductor
Operating Environment:
32 to 122°F (0 to 50°C)
0 to 95%, RH non-condensing
Material
ABS Plastic, Material Rated UL94V-O
CO
2
Detection Range:
0 – 2000 ppm
Start-Up Time:
<2 Minutes
Response Time:
<2 Minutes for 90% step change typical (after start-up)
Mounting:
2”x4” J-Box or drywall – screws provided
Override Output:
Contact ....SPST, 24V AC/DC, 0.5A max
Sensor .....Shorts Out direct temperature sensor
Setpoint ...Contact in parallel, resistive setpoint only
LCD Display:
Main Display: 0.76” 4-digit Numeric Values
Minor Display: 0.34” 3-digit Alpha-Numeric
(PPM, %RH, °F, °C)
Occupancy BAPI Man Icon: (Blk=Occupied)
Measurement Offsets:
(Field Adjustable)
±5° (F or C) in 0.1° increments
±5% RH in 0.1% RH increments
CO
2
Accuracy:
(Single Channel Automatic Background Calibration model)
400 to 1,250 ppm: ±30ppm or 3% of reading,
whichever is greater
1,250 to 2,000 ppm: ±5% of r 30ppm
CO
2
Accuracy:
(“24/7” Dual Channel Model)
75ppm or 10% of reading (whichever is greater)
CO
2
Drift Stability (Dual Channel DCD “24/7” Units):
<5% of full scale over life of product.
LED CO
2
Level Indicator:
Good, Green < 1,000 PPM
Fair, Orange = 1,000 to 1,500 PPM
Poor, Red > 1,500 PPM
Certifications:
RoHS
Warranty Period:
5 Years from manufacture date
