Application
The GDS 305 system is designed to monitor gas levels from a number of sample-points, targeted at situations where the positioning of conventional gas sensors may not be practical.
This may be due to equipment security, cable routing, access for detector head installation/maintenance, harsh environment or a cost effective means of monitoring designated hazardous areas, typically – tunnels, marine applications, underground/high level voids, process control, landfill, multi storey car parks, brewing, horticulture, retail.
Operation
Gas samples are sequentially extracted for a timed period by a central control unit via fixed sample lines. A high rate sample is taken by the main pump during which a reduced rate sample is passed across the sensor device.
The central unit provides gas level readouts with two alarm trip points per line, providing a range of signal outputs for annunciator and control functions.
Technical Data
Sensor Points |
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Sensors |
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Measurements |
- Combustible gas L.E.L. % Vol
- Toxic gas P.P.M. % Vol
- Oxygen – % Vol
- Refrigerant – ppm
- Depletion/enrichment
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Power Supply |
- 230/115v AC 50/60 Hz
- 300W max
|
LED Indicators |
- System healthy
- Main power
- Standby power
- High gas alarm
- Low gas alarm
- System, flow, sensor fail
- Comms fail
- Skip/hold
- Sampling
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Display |
- 4 line alpha/numeric indicates all functions and status in text. Sample line locations (user settable)
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User interface |
- 8 panel mounted push buttons:- Reset, Scroll, Hold, Dim, Enter, Down, Up, Select
- PC – event log / data log, data to and from system controls
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Relay Outputs |
- Global Low S.P.C.O.
- Global High S.P.C.O.
- Global Fault S.P.C.O.
- Flow Fail S.P.C.O.
- Power Fail S.P.C.O.
- Cabinet Sensor S.P.C.O.
- 32 programmable relays
Additional 32 optional |
Communication |
- RS232– Data Stream
- Modbus 2 x RS485
- Can bus – internal
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General |
- Audible alarm all alarm conditions
- LED/display dimming
- User/Eng password
- LCD backlight
- Event logging
- Sample line size 8mm OD 6mmID
- Nylon, PTFE, Copper, Stainless Steel. Max length 200m specials 300m+
- Sample vent x 2-10mm
- Tubing entry enclosure base, side option
- Response time 15 to 45 seconds
- Colour- powder coat ash grey BSA01
- Size 800H x 600W x 350D
- IP 63
- Wall mount
- Weight 65kg
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Standards |
Maritime general requirements
- EN61010: 2001
- Electrical Safety – LVD
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