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Atal AT-VLC-R1D-RS3 User Manual

Carbon dioxide detector
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User's Manual
Carbon Dioxide Detector
Model: AT-VLC-R1D-RS3
Specifications
General Data
Power supply
Consumption
Relay output
RS485 interface
LED light condition selectable
OLED Display
Operation condition
Storage condition
Net Weight / Dimensions
Installation
Housing and IP class
Standard
Carbon Dioxide
Sensing element
CO
measuring range
2
CO
Accuracy @22℃(72℉)
2
Temperature dependence
Stability
Pressure dependence
24VAC/VDC±10%
3.5 W max. ; 2.0 W avg.
One relay output (resistive load max.5A) with the control mode
selection (control a fan or a CO2 generator)
Modbus protocol
4800/9600(default)/19200/38400bps; 15KV antistatic protection,
independent base address.
3-color mode (default)
Green:
≤1000ppm
Orange: 1000~1400ppm
Red:
>1400ppm
Red flashing: CO2 sensor faulty
Display CO2/Temp./ RH measurements
0~50℃; 0~95%RH, non condensing
-10~60℃ / 0~80%RH
190g /117mm(L)×95mm(W)×36mm(H)
wall mounting with 65mm×65mm or 2"×4"wire box
PC/ABS fireproof plastic material, protection class: IP30
EMC approval
Non-Dispersive Infrared Detector (NDIR)
0~2000ppm (default)
0~5000ppm (selected in the advanced setup)
±60ppm + 3% of reading or ±75ppm (whichever is greater)
0.2% FS per℃
<2% of FS over life of sensor (15 year typical)
0.13% of reading per mm Hg
Working light mode
Green on: working
Red flashing: CO2 sensor faulty
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Summary of Contents for Atal AT-VLC-R1D-RS3

  • Page 1 User’s Manual Carbon Dioxide Detector Model: AT-VLC-R1D-RS3 Specifications General Data Power supply 24VAC/VDC±10% Consumption 3.5 W max. ; 2.0 W avg. One relay output (resistive load max.5A) with the control mode Relay output selection (control a fan or a CO2 generator)

  • Page 2: Dimension And Mounting

    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) Temperature and RH (option) Digital integrated temperature and humidity sensor or Temperature sensor (selectable) NTC thermistor Measuring range...
  • Page 3 Instruction 1. Please always cut off the power before open or clean the detector. 2. As powered on, the indicating light is red through the middle end of the face cover, and the buzzer alarm is on, these indicate the transmitter working on. The number on OLED screen displays counts down from 10 seconds to 0, and then it starts displaying measured CO2, temperature and relative humidity values.

  • Page 4: Modbus Register

    Parameter Range of setup Default Temperature correction +-5C/+-41F Humidity correction -5.0%RH~5.0%RH CO2 correction +-300ppm Relay control logic selection 0- Increase CO2 1- Decrease CO2 Ineffective - - - PID control setpoint for CO2 400~5000ppm Modbus comm address 1~247 Modbus comm baud rate 4800/9600/14400/19200/38400bps 9600 1- None parity, 1 stop bit.
  • Page 5 CO2 Measurement Float inverse 0~5000 ppm Temperature Measurement Float inverse 0.0~50.0 ℃ Humidity Measurement Float inverse 0.1~100.0 %RH Starting Data Description Function Read/ Length Format Selection Default Register Write Decimal Modbus Address INT16 1~247 Modbus rate INT16 1-4800bps 2-9600bps 3-14400bps 4-19200bps 5-38400bps Modbus Stop Bit...