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3 WIRE REDLINE (2 PCB) INFRA RED SENSOR

W +

Y SIG

P -

Fig 4

+24V

4~20mA

Panel

24V +

SIG

Panel

Transmitter

+24V

4~20mA

W +

Y SIG

P -

Panel

2 wire sensor

Transmitter

Panel

Combi direct sensor

Transmitter

Panel

Combi direct sensor

Transmitter

mV - pellistor / CV / IR

sensor Transmitter

W +

Y SIG

P -

Fig 4

SENSOR – 3 WIRE

SENSOR – 2 WIRE

INFRA RED SENSOR – 3 WIRE

Gas Detector

Control Unit

Detector Head

mV (pellistors) or 3 wire CV

W +

Y SIG

P -

Gas Detector

Control Unit

Transmitter

Gas Detector

Control Unit

Transmitter

24V +

SIG

Sensor

TOXIC

SENSOR CELL

OXYGEN

Fig. 5

RED ident

R = flammable

YELLOW ident Y = toxic
BLUE ident

B = oxygen

GREEN ident G = others

W +

Y SIG

P -

Fig 4

+24V

4~20mA

Panel

24V +

SIG

Panel

Transmitter

+24V

4~20mA

W +

Y SIG

P -

Panel

2 wire sensor

Transmitter

Panel

Combi direct sensor

Transmitter

Panel

Combi direct sensor

Transmitter

mV - pellistor / CV / IR

sensor Transmitter

3 WIRE SENSOR

2 WIRE SENSOR

Содержание 404+ Series

Страница 1: ...GDS TECHNOLOGIES LTD FUSION POINT ASH LANE GARFORTH LEEDS LS25 2GA UK www gds technologies co uk This document is not contractual and the equipment specification may be modified at any time without prior notice C1795 Manual No 043D6C Issue Av2 GDS404 SERIES OPERATING HANDBOOK ...

Страница 2: ...1 4 Alarm Board Component Layout 12 5 Sensor Termination 13 6 CV Transmitter Toxic Oxygen 14 7 CV Transmitter Flammable 15 8 XDI XDI win 30J Flammable Sensor 16 9 XDI XDI win 30J Toxic Oxygen Sensor 4 3 2 wire sensor 18 10 XDI XDI win 30J Prime Sensor 20 11 XDI XDI win 30J 4 20mA Input 22 SYSTEM DATA Manufacture date Works Order No Sensor type life life life life Gas Range Low alarm trip High alar...

Страница 3: ...optional standby battery is fitted loss of mains supply will result in the GREEN Mains ON Lamp changing to RED GAS ALARM will be indicated by a red LED and display channel changing to a red background with text indicationg the alarm status Fault conditions are indicated by amber displays SOUNDER initiated in the presence of a fault or gas alarm condition TEST when pressed for 15 seconds alarm indi...

Страница 4: ... CABLE Flammable catalytic 3 core 1 5mm screened cable mineral insulated copper sheathed or steel wire armoured maximum cable loop resistance 20 ohms Toxic Oxygen 3 core 0 5 mm screened cable mineral insulated copper sheathed or steel wire armoured maximum cable loop resistance 200 ohms POWER SUPPLY 230 110v AC 50 60Hz or 24v DC 21 30 volts tolerance POWER CONSUMPTION Per channel Normal operating ...

Страница 5: ... As the gas rises it draws air from the surroundings and creates a turbulence Resulting from this there occurs rapid dilution and unless a sensor is positioned within the plume there will be no initial indication of a leak As gas continues to escape the diluted concentration rises to ceiling level and begins to layer In time the concentration at ceiling level will increase and this in turn will di...

Страница 6: ...n the off condition Where an internal standby battery has been supplied the connectors should be made on JP11 and JP12 Re set alarms by pressing the reset button located on the front panel Allow ten minutes for the sensors to stabilise Any flammable or toxic sensors should be adjusted to read zero by means of appropriate ZERO POTENTIOMETER marked Z on the alarm module or for oxygen sensor adjust t...

Страница 7: ...ters Over range alarm AL3 is set using the potentiometer on the front panel PCB labelled RL4 This is a global alarm that applies to all four channels One sensor zero level should be raised up to the desired alarm level by turning that channel s zero pot The Alarm 3 set pot should then be turned until the third alarm just activates default setting F S D The zero pot can then be adjusted back to nor...

Страница 8: ...y down the procedure for dealing with a gas alarm or fault warning To ensure reliability an agreement should be negotiated for regular servicing When a service contract cannot be arranged an employee with suitable experience of electrical equipment should be trained to deal with the more simple servicing and instructed not to attempt to exceed the scope of such training Liaison should be establish...

Страница 9: ...1 C2 C3 C4 INDICATORS L E L Lower Explosive Limit PPM Parts Per Million vol Volume Hi High Alarm Red Lo Low Alarm Red C1 C4 Channel Sensor Fault Indicator Amber Power On Green Mains Fail Red Inhibit Amber Reset Sounder Alarms Test Electronic System Test Fig 1 ACTION TO BE TAKEN IF THE APPARATUS ALARM SOUNDS A Extinguish all naked flames including all smoking materials B Turn off all gas appliances...

Страница 10: ...1 TP5 DVM4 3V DVM4 5V DVM3 5V DVM2 5V DVM1 5V Option A Spare Jumpers Option B DVM3 3V DVM2 3V DVM1 3V DVM Lo Offset Alarm 3 set Fit to normally energise Fit to latch alarm NO C NC RL4 O R Relay OR Over range TP8 J22 TP10 TP2 TP7 SN1 TP6 0V 5V 3 3V J10 J26 J27 J30 J25 J26 S4 J1 USB Master Reset FSDA FClick J32 ...

Страница 11: ...Normally energised Normally de energised J1 Global Alarm Relay Normally de energised Common Fault Relay Normally energised Normally de energised J5 Inhibit Relay Normally de energised Channel relays 1 4 A B Lo Hi see alarm board page 14 SOUNDER PERMANENT MUTE JP10 remove STANDBY BATTERY Connect leads to JP11 and JP12 ...

Страница 12: ... Oxygen Alarm Set Low Low Alarm LL Time delay to alarm T1 10 secs T2 30 secs When used with GDS300 Flow sample systems FS SENSOR SELECTION 24v 4 20mA input P Pellistor mV input 4 20MA OUTPUT TP3 TP4 CALIBRATION TP1 TP2 ADJUSTMENTS Potentiometer RV1 Sensor Zero Potentiometer RV2 Sensor Calibration Potentiometer RV3 4 20mA signal output 4mA adjust Potentiometer RV4 4 20mA signal output 20mA adjust P...

Страница 13: ... Unit Transmitter W Y P 24V OV SIG Sensor Sensor Sensor TOXIC SENSOR CELL OXYGEN P W Y P Y Fig 5 RED ident R flammable YELLOW ident Y toxic BLUE ident B oxygen GREEN ident G others W Y P W Y SIG P Fig 4 W Y P 24V Hi Lo Ov 4 20mA Panel W Y P 24V OV SIG Panel IR Transmitter W Y P 24V Hi Lo Ov 4 20mA W Y P W Y SIG P Panel 2 wire sensor Transmitter Panel Combi direct sensor Transmitter Panel Combi dir...

Страница 14: ...here a digital panel meter is fitted to the CV card the reading may be adjusted by the DPM Z potentiometer zero Calibration With the digital meter connected to the test pins TP1 and TP2 and a reading of 4mV clean air apply test gas and wait until a maximum reading is obtained if necessary adjust the 20mA potentiometer for the required mV reading for the calibration gas being used Where 4 20mA span...

Страница 15: ... printed on the CV circuit board 4 For oxygen level monitoring remove the sensor terminal connector from the PCB J4 or yellow wire and adjust the 4mA potentiometer for 4mA 4mV 5 Where a digital panel meter is fitted to the CV card the reading may be adjusted by the DPM Zero potentiometer Reconnect the cell and allow reading to stabilise adjust the DVM reading for 17 3mA 20 8 ambient oxygen using t...

Страница 16: ...ate address is detected F indicates a fault present I shows that this sensor has its alarms inhibited under the O H L the v represent the direction of the alarms L is falling and H and O are rising A under the letter s OHLDFI represents a detected state so in this example the sensor would be in high alarm and a fault present Gas val 35 6 represents the value of the gas present at the sensor head P...

Страница 17: ...r is 15 seconds approximately and is reset back each time a magnet is near Waiting till timeout is acceptable but this timeout can be speeded up by placing a magnet near to the centre position SPAN is the next part of the menu and gas should be applied to the sensor at this time The left magnet increases the gain and the right magnet reduces gain The actual sensor value can be seen on the display ...

Страница 18: ... change the address of this sensor if required d Press N to select the number of decimal places to 1 or 2 ie dp 1 or dp 2 e With no gas applied and 4mV measured at test pins TP8 TP9 press Z to zero the gas reading see note f Then apply span gas and press S to enter span mode optain correct mV reading for test gas used by adjusting 20mA pot The displayed reading can be made HIGHER by pressing H or ...

Страница 19: ...ay will return to normal after a few seconds timeout The right magnet allows the CAN address of the sensor to be changed WHEN the ADDRESS menu is displayed with a prompt to remove the magnet and then the display shows the address and that the right magnet will decreases it whilst the left magnet will increase it This is then stored in internal non volatile memory and the display will automatically...

Страница 20: ...s that this sensor has its alarms inhibited under the O H L the v represent the direction of the alarms L is falling and H and O are rising A under the letter s OHLDFI represents a detected state so in this example the sensor would be in high alarm and a fault present Gas val 35 6 represents the value of the gas present at the sensor head Pressing R on the PC causes a reset to occur Gas type with ...

Страница 21: ...eve a zero reading on the display A timer is displayed on the LCD and when this reaches 0 the next menu is displayed This timer is 15 seconds approximately and is reset back each time a magnet is near Waiting till timeout is acceptable but this timeout can be speeded up by placing a magnet near to the centre position SPAN is the next part of the menu and gas should be applied to the sensor at this...

Страница 22: ...ssable 4 20mA Input 24 Hi Lo 0v 4 20mA 24 Hi Lo 0v 4 20 IN SO SK 4 20 IN SO SK 4 20 IN Command Use A Set CAN address Sets the CAN address G Select gas type Select the gas type from a list Z Zero Press when no gas on sensor to give zero S Span Use when calibration gas applied H and L change reading D Enter calibration date Enter the calibration date Y Toggle auto zero Auto zero is ON or OFF small d...

Страница 23: ......

Страница 24: ... T 44 0 113 286 0166 GDS TECHNOLOGIES LTD FUSION POINT ASH LANE GARFORTH LEEDS LS25 2GA UK www gds technologies co uk This document is not contractual and the equipment specification may be modified at any time without prior notice ...

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