VT3000HVAC

Retransmission Output : 4~20mA or 0~10V

CO (Carbon monoxide) Measuring Method : Electrochemistry

CO₂ (Carbon dioxide) Measuring Method : NDIR Sensor

Communication Output : RS485 MODBUS RTU (option)

Temperature / Humidity sensing element : CMOSens sensor

Configured using a PC with free software and interface cable (option)

Process value offset adjustable (available on COwith Temperature and Humidity display type/option)

Digital keypad to adjust output calibration

Backlight LCD Indication to show CO/CO2 concentration

Specification
CO Measuring method	Electrochemistry
CO2  Measuring method	NDIR Sensor
Temperature / Humidity Sensing element	CMOSens sensor
Load Resistance	4~20mA Current output : max. 500Ω
	0~10V Voltage output : min. 600Ω
A / D Resolution	15 bits
Output Response Time	<200 ms
RS485	RS485 MODBUS RTU : N81、N82、O81、E81 Format
Baud Rate	2.4K、4.8K、9.6K、19.2K、38.4K、57.6K、115.2K
RS485 Address	1~255
Display Type (specify when ordering)	CO with Temperature and Humidity / CO / CO2
CO Response Time	60 seconds
CO2 Sampling Time	1 second
Temperature / Humidity Sampling Time	1~10 seconds available
CO Measuring Range	0~100ppm or 0~300ppm or 0~500ppm (specify according to customer’s requirement)
CO2 Measuring Range	0~2000ppm or 0~5000ppm (RS485 communication required for 0~10000ppm)
Operating Temperature and Condition	Temperature : -10~50°C
	Humidity : 0~100% RH (non-condensing)
CO Measuring Accuracy	±10ppm
CO2 Measuring Accuracy	±70ppm
Temperature / Humidity Measuring Accuracy	±3%RH (10~90%RH) (at 25°C)，±0.4°C (at 25°C)
	(power supply 24VDC, operating temperature at 25°C)
Backlight LCD Indication (other LCD colors available on request)	CO	Green : 0~9ppm	Blue : 10~30ppm	Orange : >31ppm
	CO2	Green : 0~600ppm	Blue : 600~1000ppm	Orange : >1001ppm
Power Supply	DC 24V
Current consumption	DC 50mA
Housing	ABS
Dimensions	Length 135mm x Width 85mm x Height 40mm

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