REV6 9/2018
MADE IN USA
Digital Control Systems, Inc.
7401 SW Capitol Hwy Portland, OR 97219 USA: 503-246-8110 Fax: 503-246-6747 https://www.dcs-inc.net
Made in USA
CARBON DIOXIDE SENSOR (CO2)
Parameter Value
Operating Principle Dual beam non-dispersive infrared (NDIR)
Gas Sampling Method Diusion
Measurement Range 0-2000 ppm
(Other ranges available by request)
Repeatability ± 20 ppm CO2
Measurement Accuracy ± 30 ppm ± 2% of reading
Recommended Calibration Interval 5 years
Warm Up Time Less than 1 minute
Calibration “ONE POINT”single-button calibration
with AirSense Calibration Kit (PATENTED)
Warranty 7 years electronic components/ 3 years
NDIR Sensor
Your sensor comes factory-calibrated and does not need to be
calibrated upon initial installation. Calibration kits are available and
include all the necessary elements, including a 17 liter cylinder of
2000 PPM calibration gas (enough gas to calibrate 15-20 units).
Recommended calibration interval is 5 years.
CO2 Calibration ProcedureCalibration-Kit CO2 Calibration Indicator LEDs
ELECTRONIC
COMPONENTS
WARRANTY
7 YEAR
Green LED will blink
if the unit “PASSES”
calibration.
Red LED will blink
if the unit “FAILS”
calibration.
When calibration
sequence is acti-
vated, “CAL” LED
will blink yellow.
Calibration Process: using the AirSense Model 315-CAL kit
Remove the AirSense Model 315 cover plate and install the Calibration Cover Plate.1.
Attach the clear CO2 calibration gas tube onto the tting marked“1”.2.
Open the valve on the 2000 ppm CO2 bottle.3.
For best accuracy, allow calibration gas to ow for 15 seconds to ll the sensing cell, then press4.
and hold the (START) button for 3 seconds to activate the calibration sequence (until the yellow
LED begins to blink).
The yellow (CAL) LED will ash for 2 minutes to allow the reading to settle. During that time:5.
Do not remove electrical power during calibration. If power is lost no changes will be saved•
and the sensor will revert to using the previous calibration values.
Do not interrupt ow of the 2000 ppm CO2 gas.•
The procedure can be aborted by pressing the START button.•
At the end of the settling period, one of the following will occur:6.
The green (PASS) LED will ash continuously to indicate calibration was successful. In this•
case, press the (START) button within 3 minutes to save the new calibration to memory.
The red (FAIL) LED will ash continuously to indicate that the calibration failed due to an•
unstable measurement. In this case, press the (START) button to acknowledge that calibra-
tion was not successful and begin again with Step 4 above.
After calibration, the sensor will return to normal operation.7.
Close the valve on the 2000 ppm CO2 bottle, and remove the tubing.8.
Remove the Calibration Cover Plate and reinstall the Model 315 enclosure cover.9.
Reinstall the enclosure cover locking screw.10.
Overall Specication
Parameter Value
Power Requirements 18 - 30 VDC or 18 - 28 Vrms AC
Power Consumption 2.5 VA
Operating Temperature Range 0 - 50 0C
Operating Humidity Range 0 - 99% RH, non-condensing
Output
(for details see “eld-selectable output
setting diagram” page 1)
Current Output 4-20 mA
Voltage Output 0-10V
Voltage Output 0-5V
Optional Current Output (linear) 4-20 mA RLOOP < 600 Ω
Storage Temperature -10 to 60 0C
Dimensions 2.80”W x 4.57” H x .27”T
Enclosure Material UV and UL 94V-0 Fire Resistant ABS Plastic
Weight 5.85 oz (0.17 kg)
