DA-500_COG-2Wire/3Wire (COKE OVEN GAS)
DA-500_COG-2Wire/3Wire (COKE OVEN GAS)
- Introduction
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DA-500_COG-2Wire/3Wire (COKE OVEN GAS) Wire detects various combustible & toxic gases leaked from industrial areas for gas producers, gas users, gas reservoirs, gas by-producers, and so on, in order to prevent any accidents in advance. DA-500 converts digital signal into the 4-20mA standard current output signal which can be transmitted to various devices such as PLC, DDC, or recorder to build comprehensive gas monitoring system. Also, DA-500 provides RS-485 communication signal and alarm relay contact. DC 4-20mA standard output signal realizes max 2500m long distance output signal transmission and RS-485 communication signal realizes max 1000m long distance signal transmission.
- Features
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Digital Process
Digital processor based on built-in micro processor realizes various artificial intelligent functions which result in convenient gas monitoring environment.
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Self diagnosis
Digital process automatically diagnoses the sensor signal and sends 2mA error signal output on the malfunction in the sensor.
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Auto-calibration without opening cover
You don¡¯t need to open front cover for calibration. You only have to touch cover window using magnetic bar. It is quite useful for the corrective work in the explosive area.
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LCD display with back light
LCD offers real-time display of gas density and back light offers easy reading even in dark area.
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User programming
User programming calibration density and detection rage offers user¡¯s own operating functions.
- Built-in HD(high dissolution) A/D converter for accurate output signal.
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Multi signal output
Various output signals - DC 4-20mA, 2 step-relay contact, & RS-485(option) – provides best networking with all kinds of devices & equipments.
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4-20mA transmitter
4-20mA output enables stable and long distance (maximum 2.5km) signal transmission.
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RS-485
RS-485 enables stables stable and long distance (maximum 1.2km) signal communication.
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Alarm output
SPST 2 step relay contacts (AL1/AL2).
- Specification
Specification
Detection principle |
NDIR (Nondispersive infrared) |
Gas sampling |
Diffusion type |
Target gas |
Please refer to the target gas list. |
Measurement range |
%LEL, PPM, %vol |
Response time |
Within 10 sec., 90% / full scale |
Accuracy |
¡Â¡¾2%/Full Scale |
Sensor displacement |
Zero - ¡Â¡¾1%LEL/6 Month, Span -¡Â¡¾1%LEL/6 Month |
User programmable |
Calibration density, detection range |
Input power |
DC 20~30V |
Output power |
4~20mA/Full Scale - 2.5km Transmission |
Operating temp.& humidity |
-30¡É~60¡É, 5~95% RH (Non-Condensing) |
Signal cable |
CVVS & CVVSB 1.5sq x 3 Wire - Shield Type |
Wire conduit |
1/2¡± or 3/4¡± PF, NPT |
Installation type |
Wall or Pipe Station |
Exterior material |
Cast Aluminum Alloy |
Explosion-proof |
Ex d IIC T5 - Korea Gas Safety Corporation |
Output |
2 step- Relay Contact (High/Low) |
Communication output |
RS-485 communication output(option) |
- Downlaod