Gas Detection (Australia) Pty Ltd Page 6 of 44
M-GDA-3000 Rev 1
1.
Introduction
The GDA-3000 is an infrared(IR)-type gas detector that is developed to prevent serious
accidents caused by gas leaks by detecting a variety of gases in hazardous areas such as
industrial plants, gas storage facilities and factories in the process of producing or consuming
flammable gases, CO or CO2.
When the GDA-3000, IR-type gas detector is installed in locations that may have gas leaks, it
will continuously monitor the ambient level of gas and display the measured gas value on its
integrated LCD or OLED. Additionally, it supplies DC 4-20mA standard output, isolated RS-
485 communication signal, HART and relay contact signal on occurrence of gas alarms.
For standard output of DC 4-20mA, output receiver can support up to 500 meters distance
away from gas detector to receive output signal(When CVVS or CVVSB 2.0 sq
↑
shield cable
is used). And communication signal of RS-485 can be transmitted up to 1,000 meters (when
RS-485 dedicated line is used).
2.
Structure
The body of GDA-3000 is made of aluminium alloy and its structure is designed to be
explosion-proof(Ex d IIC T6). The product can be installed in areas that may have flammable
gas leaks and explosions. The integrated liquid crystal display(LCD or OLED) displays current
gas leakage level on the spot.
The internal structure consists of LCD for gas level, connector delivering output such as
measured value(DC 4-20mA) or isolated RS-485 communication signal(optional), HART
communication and alarm signal, and two PCB boards. The outer structure is composed of
sensing parts for detecting gas leakage and cable inlets (2ea). The gas detector can be
calibrated from outside of the device using magnet-bar, which makes maintenance easier.
