Atal AT-VLC-ND-A1-PID User manual
1
User’s Manual
Carbon Dioxide Detector
Model: AT-VLC-ND-A1-PID
Specifications
General Data
Power supply
24VAC/VDC±10%
Consumption
3.5 W max. ; 2.0 W avg.
Analog outputs
One 0~10VDC/4~20mA for CO2 measurement
PID control output is selectable for CO2
LED light
3-color mode (default)
Green: ≤1000ppm
Orange: 1000~1400ppm
Red: >1400ppm
Red flashing: CO2 sensor faulty
Operation condition
0~50℃; 0~95%RH, non condensing
Storage condition
-10~60℃ / 0~80%RH
Net Weight / Dimensions
190g /117mm(L)×95mm(W)×36mm(H)
Installation
wall mounting with 65mm×65mm or 2”×4”wire box
Housing and IP class
PC/ABS fireproof plastic material, protection class: IP30
Standard
EMC approval
Carbon Dioxide
Sensing element
Non-Dispersive Infrared Detector (NDIR)
CO2 measuring range
0~2000ppm
CO2 Accuracy @22℃(72℉)
±60ppm + 3% of reading or ±75ppm (whichever is greater)
Temperature dependence
0.2% FS per℃
Stability
<2% of FS over life of sensor (15 year typical)
Pressure dependence
0.13% of reading per mm Hg
Calibration
ABC Logic Self Calibration Algorithm
Response time
<2 minutes for 90% step change typical
Signal update
Every 2 seconds
Display resolution
1ppm
Warm-up time
2 hours (first time) / 2 minutes (normal operation)
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Dimension and Mounting
◆Please note the power supply is 24VAC/VDC±10%. Don’t install the detector with over the voltage.
◆First of all, please prepare a flat head screwdriver and gently put it deep inside of the hole on the bottom
of the detector housing. Then slant the screwdriver and open the cover gently. Do not mount it near
diffuser or any steam source, in direct sunlight.
◆Mount the wall plate. Place the detector against the wall at desired location; make sure wires can be
passed through the notch on the wall plate.
◆Connect wires to terminal strips. Make sure wiring connection correct and secure.
◆Finally close the cover gently.
Wiring Diagram
Analog output selection
Open the cover, there are 3 black blocks J1 & S1~S2, the default analog output is 0-10V, refer to below
picture to adjust the analog linear output.
3
DIPs Setting
Cut off the power and open the cover, there are four DIP switches on the middle right side of circuit board.
DIP1=OFF Normal use DIP1=ON Set advanced parameter (not available) Default: OFF
DIP2=OFF Centigrade DIP2=ON Fahrenheit Default: OFF
DIP3=OFF Analog linear output DIP3=ON PID output Default: OFF
DIP4=OFF PID setpoint DIP4=ON Analog output max/min Default: OFF
(Note: refer to below table for DIP4, J2, J3 settings, J2 and J3 are located beside of J1)
DIP4
J2
(0: disconnect, 1: connect)
J3
(0: disconnect, 1: connect)
Function
OFF
(Default)
0
0
PID setpoint 1000ppm (default)
1
1
PID setpoint 1200ppm
0
1
PID setpoint 600ppm
1
0
PID setpoint 800ppm
ON
0
0
Linear output
1
1
AN1 output max. value
0
1
AN2 output max. value
1
0
AN1/AN2 output min. value
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