GDS Technologies GDS 302

TECHNOLOGIES LTD

GDS 302

Single line sample unit

Specification Sheet ref C910

• Continuous monitoring

• Flammable, oxygen or toxic gases

• Easily installed and maintained

• 2 alarm levels

• Alarm relay outputs

• Delay to alarm options

• 4~20mA analogue output

• Compact size

• Comprehensive fault monitoring

• Line blockage monitoring

• Pump failure monitor

• Optional remote pumped sensor unit

Application

The GDS 302 system is designed to monitor gas levels in 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, brewing, horticulture, livestock husbandry.

Operation

A gas sample is continuously extracted via a fixed sample line from the target area. The central unit provides gas level readouts with two alarm trip points, providing a range of signal outputs for annunciator or control functions.

Technical Data

Measurements

Power supply

Frequency

Consumption

Alarm Settings

Alarm delay

Outputs

•

Combustible Gas L.E.L %Vol, ppm

Toxic Gas - ppm, %Vol

Oxygen % Vol

•

230/115vAC or 24vDC ± 15%

The two voltages may be used simultaneously (standby batteries)

•

50/60Hz

•

10 watts

•

Digital setting (fully adjustable between zero and full scale)

•

T1 - 10 seconds, T2 - 30 seconds,

T1 + T2 - 10 minutes

•

Low alarm relay - S.P.C.O

•

High alarm relay - S.P.C.O

•

Fault alarm relay - S.P.C.O

•

Relays rated 5A/230vAC

ND or NE pre set normally de energised

•

Analogue 4-20mA/1-5v

•

24vDC - 100mA max

(Auxiliary equipment supply)

Indicators

Audible Alarm

Reset Switch

Test Switch

Inhibit

Protection

Environmental

Cable Entry

Sample Tube

Miscellaneous ref C910

•

Power - Green L.E.D.

•

Alarms - Low/High - Red L.E.D.

•

Fault - Amber L.E.D.

•

System test alarm L.E.D’s flashing

•

Low, High gas and Fault

Permanent mute option

•

Auto or Manual - pre set manual

•

Used to check alarm indicators, sounder and relay action

•

Isolation of alarm relays during service

•

IP65

•

Ambient temperature -5 to 45˚C

•

Storage temperature +10 to 60˚C

•

Humidity range 0 - 90 RH

•

Rear, side, top, bottom

•

6mm OD 4mm ID

•

Max. length 6m

•

Dimensions 240H 200W 60D

•

Weight 1.1kg

•

Cable entry - bottom, sides, rear

High

Low

Fault

Power

Reset

Test

GAS ALARM GDS-302

3 core cable - 1km

(24vDC Sig 4/2amA)

OUT

IN

Remote sensor unit

T1 –

T2 –

T1 & T2

LL –

O 2 –

RES –

TP1 –

Alarm delay - 10 secs

Alarm delay - 30 secs

Alarm delay - 10 minutes

Low/Low alarm

Oxygen sensor

Manual/Auto Reset

OV

TP2 +

TP3 –

TP4 +

TP5 –

]

] 4~20mA output

DPM span

TP6 and TP1 sensor supply mV=mA

0.5v=F.S.D

mV = mA

C915 ISO 9001

This document is not contractual and the equipment specification may be modified at any time without prior notice.

GDS Technologies Ltd

Fusion Point, Ash Lane

Garforth, Leeds LS25 2GA

Tel +44 (0)113 286 0166

Fax +44 (0)113 287 8178 [email protected]

www.gds-technologies.co.uk

TECHNOLOGIES LTD