Installation and Operating Instructions
VOC Room Sensor in the BAPI-Stat 3 Enclosure
with Differential Ground Configuration
Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA
Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:[email protected] • Web:www.bapihvac.com
Specifications subject to change without notice.
29156_ins_voc_room_dif_gnd
1 of 8
rev. 06/05/18
Fig 1:
BAPI-Stat 3 Room VOC Sensor
with Optional 3-Color LED
Humans exhale Volatile Organic Compounds (VOCs) as well
as CO
2
. The BAPI sensor is able to measure these VOCs,
therefore it is as good an indicator of space occupancy as a CO
2
sensor.
The BAPI Sensor is different from other VOC sensors because
it has been optimized for Demand Controlled Ventilation (DCV).
Using a calibration algorithm, the sensor value is converted to
an output with a high correlation to a CO
2
level. This lets you
use ASHRAE’s occupancy-based VRP schedule to ventilate.
(More information on this correlated output is available on our
website at www.bapihvac.com)
The sensor also picks up VOCs from other sources such as
building materials, perfumes, colognes and furniture off-gassing.
Using this sensor to ventilate is a way of achieving true indoor
air quality and not just CO
2
dilution.
The unit is available as a VOC sensor alone or in combination
with temperature and humidity. The optional display alternates
between the measured values and is field adjustable between
°F and °C. An optional three color LED indicates a “VOC Level”
of Good, Fair or Poor.
Identification and Overview
Specifications
Optional
3-Color LED
Power:
(No AC Power)
0 to 5 VDC Output Units:
9 to 35 VDC @ 50 mA Max (9 to 15 VDC recommended)
0 to 10 VDC Output Units:
15 to 35 VDC @ 50mA Max (15 VDC recommended)
Sensing Elements:
Humidity: Capacitive Polymer, ±2% RH Accuracy
VOCs: Micro-machined Metal Oxide
Temp Sensor
: Thermistor, RTD or Semiconductor
Mounting:
2”x4” J-Box or drywall mount – screws provided
VOC Detection Range:
0 to 2,000 CO
2
PPM equivalent
Response Time:
Less Than 60 Sec. (after Start-Up Time)
Start-Up Time:
15 minutes
Operating Environment:
32 to 122°F (0 to 50°C)
0 to 95% RH non-condensing
LCD Display:
Main Display: 0.76” 4-digit Numeric (Numeric Values)
Minor Display: 0.34” 3-digit Alpha-Numeric (PPM, %RH, °F, °C)
Occupied/Unoccupied BAPI Man Icon: (Blk=Occupied)
Measurement Offsets (field adjustable)
±5° (F or C) in 0.1° increments
±5% RH in 0.1% RH increments
±5% Contaminants in 0.1% increments
±100 ppp CO
2
Equivalent Contaminants in 2 ppm incre-
ments
Analog Outputs
(0 to 5, 0 to 10 or 2 to 10VDC [%RH only], >10KΩ impedance)
VOC Contaminants: 0 to 2,000 CO
2
PPM equivalent
%RH: 0 to 100% or 35 to 70% RH
Override Output:
Contact: SPST
Sensor: Shorts out direct Temperature sensor (Temp)
Setpoint: Contact in parallel, resistive setpoint only
LED CO
2
Equivalent Level Indicator:
Good, Green < 1,000 PPM
Fair, Yellow = 1,000 to 1,500 PPM
Poor, Red > 1,500 PPM
Material:
ABS Plastic, Material Rated UL94V-0
Certifications:
RoHS
Warranty Period:
5 years from manufacture date
Note:
The VOC contaminant output (CO
2
/VOC terminal on the circuit card) is scaled for 0 to 2,000ppm equivalent CO
2
for use in an ASHRAE Standard 62.1 Demand Control Ventilation algorithm. The display shows contamination to an
equivalent 5,000ppm CO
2
. This allows additional troubleshooting for a building manager to determine if there is a very
large VOC contamination when the transmitted output is at its maximum value
