GAS SENSE INSTRUCTIONAL MANUAL
Contents
1. 6 1 TECHNICAL DATA 6 2 NORMAL DEVICE 5 6 3 MOLECULAR WEIGHT TARGET 5 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense This document is intended to serve as an Instructional manual for fixed gas detection instrument offered by Zeta Alarm Systems a brand name of GLT Exports Limited namely the Gas Sense 2 1 ABOUT ZETA FIXED GAS SESNOR THE GAS SENSE It is designed to monitor propane gas leaks It has an external alarm output plus 3 volt free alarm relays With its rugged casing it is designed to withstand rough handling A 24V direct reading gas monitoring system with programmable 3 alarm levels It operates as standalone device and can also run with Zeta central gas control panel ZSC100 as a loop device 2 2 PRINCIPLE OF OPERATION A loop of Zeta Gas Sense currently up to 48 can be set up to transmit gas levels to central control panel ZSC100 This makes simultaneous monitoring of various gases of interests easy The units operate by continuously transmitting their sensor readings to the control panel which in turn monitors for changes to the programmed thresholds If the sensor reading exceeds the threshold the panel and detector display the gas concentration level in percentage of the lower explosive limit LEL Appropriate alarm level is triggered while the sounde2. Adjust ALARM1 30 LEL e Press the OK button again to prompt the right pointing edit arrow Adjust ALARM 30 LEL e the arrow prompts use either the 4 or buttons to increase or decrease the detector s ALARM 1 level 4 6 SETTING UP OR ADJUSTING ALARM 2 LEVEL e Press the buttons simultaneously to enter into the ACCESS menu screen Access Mode e Press the OK button and press the 7 button to move up till ALARM2 screen prompts Adjust ALARM1 45 LEL e Press the OK button again to prompt the right pointing edit arrow 15 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense Adjust ALARM1 45 LEL e Once the arrow prompts use either the 4 or buttons to increase or decrease the detector s Alarm2 level APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 16 Zeta Gas Sense 5 1 VERIFYING INSTRUMENT PERFORMANCE BUMP TESTING We recommend regular bump testing to verify instrument performance Apply appropriate concentration of target gas to the instrument at least every 90 days TEST REQUIREMENT Propane Gas Sense is shipped with white nozzle for controlled injection of gas Customer is advised to obtain hose appropriate concentration of target gas zeroed in air and fixed flow regulator TEST PROCEDURE e Insert the white nozzle onto the
3. 6 1 TECHNICAL DATA Operating Voltage Power Up Time Response time IP Rating Maximum Humidity Operating Temperature Detection Gas Programmable Alarm Levels Operating Modes System Connection Dimension 24V DC lt 30 Seconds lt 10 Seconds 65 0 99 RH 40 to 60 C Toxic Flammable and Oxygen gases 3 Stand alone and Central Controlled System 2 wire 20 x 13 x 7 cm Breadth x Width x Height 19 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense Quiescent Current Combustible 66 9 6 2 NORMAL DEVICE OPERATIONS To aid system commissioning and maintenance it is useful to note that e It takes lt 10 seconds for the screen to appear upon start up e detector on the loop that is communicating with the gas control panel displays SYS NORMAL screen Similarly normal operation in Standalone Mode appears on the screen as STD NORMAL 6 3 MOLECULAR WEIGHT OF TARGET GASES c02 NO2 H2S NH3 N BUTANE N HEPTANE N HEXANE N OCTANE N PENTANE PROPANE TOLUENE UNLEADED PETROL ACETONE BENZINE ISOPROPYL ALCOHOL ETHANOL ETHYL ACETATE APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 28 44 30 34 17 58 100 86 114 72 44 92 114 58 78 60 46 88 20 Zeta Gas Sense ETHYLENE METHANE METHANOL METHYL ETHYL KETONE OXYGEN AIR 28 16 32 72 32
4. DATE 28 05 2012 Zeta Gas Sense XXX XXX XXX Press OK button to return back to Normal Display 4 3 2 VIEWING THE ALARM LEVEL AS A LOOP DEVICE Press the buttons simultaneously to view the alarm levels PRE ALM ALM1 ALM2 XXX XXX XXX Press ESCAPE lt button to return back to Normal Display 4 4 SETTING UP OR ADJUSTING THE PRE ALARM LEVEL This is the first phase of the 3 alarm thresholds It gives an early warning about the concentration of the target gas The detector alarm indication moves from PRE ALARM into ALARM1 and ALARM 2 as the atmosphere gets more flammable or toxic Zeta Gas Sense has selectable values for the pre alarm Alarm1 and Alarm2 thresholds Press the buttons simultaneously to enter into the ACCESS menu screen Access Mode Press OK to display the PRE ALARM level Adjust PREALM 10 LEL Press the OK button again to prompt the right pointing edit arrow Adjust PREALM 10 LEL Once the arrow prompts use either the 7 buttons to increase or decrease the detector s PRE ALARM level 14 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense 4 5 SETTING UP OR ADJUSTING ALARM 1 LEVEL e Press the buttons simultaneously to enter into the ACCESS mode screen Access Mode e Press the OK button and press the 7 button to move up till ALARM1 screen prompts
5. connected to ZSC100 gas controller panel it is possible to temporarily reset the sounder by resetting the detector from the panel s reset button It is also possible to control any number of sounders connected to a particular zone from the gas controller panel For further information read the ZSC100 Gas Sense control panel manuals Once you are done with wiring place the front cover and drive the four bolts across the cover into the detector using Allen keys 12 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense 4 1 GAS SENSE ADDRESSING Addressing detectors is important especially when they are driven on a loop It is necessary to ensure that no two detectors have the same address Work through the following steps to get the detector addressed e Identify the 3 set of address switches on the detector s main PCB e Set each of them to desired device address For example to give a detector address number 5 as above Set switch 1 to 0 Set switch 2 to 0 and Set switch 3 to 5 4 2 USER CONTROLS There are 1 OK buttons 4 3 VIEWING THE ALARM LEVELS There are 3 adjustable alarm levels provided to warn of increasing gas levels namely PRE ALARM ALARM1 and ALARM2 4 3 1 VIEWING THE ALARM LEVEL AS A STAND ALONE DEVICE Press OK button to view the 3 alarm levels PRE ALM ALM1 ALM2 13 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED
6. 29 The molecular mass above is calculated from the chemical formula of the gas using C 12 H 1 and 16 For example Isopropyl Alcohol with chemical formula C3HgO would give a molecular mass of 12x3 1x8 16 60 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 21
7. SCREWS The Detector design consists of 2 chambers The main chamber houses all the electronics and is where all electrical connections are made The second chamber is where the sensor element is located This design allows the sensor element to be easily replaced by removing 2 external screws and 2 internal screws This avoids all contact with the main electronics The housing is made from flame retardant ABS The filter housing is made from stainless steel APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense 3 1 CONDUCTING SITE SURVEY A thorough site survey is strongly recommended prior to installation of Zeta Gas Sense The aim of the survey is to give the Commissioning Installation Engineer understanding of type of gas es that may be present at various locations within the site With knowledge of molecular weight of the gases he would be able to identify suitable location to place each detector Site survey studies will also advise on number of detectors needed for optimum coverage of site 3 2 PROPANE GAS SENSE SITTING AND SPACING There are no absolute guidelines in determining number of detectors and their locations Generally we recommend enough separation between the detector floor and ceiling bearing in mind the expected movement of the target gas Lighter Gases 30cm to 50cm Gases of Similar Weight to Air 1 2 to 2 0m Heavier Gases 30cm to 50cm For optimum coverag
8. Zeta Alarm Systems 72 78 Morfa Road Swansea SA1 2 UK Phone 44 0 1792 455175 Fax 44 0 1792 455176 E mail Visit us at yeta O N ALARM SYSTEMS HIGH LEVEL Propane Gas Sense Instructional Manual Zeta Gas Sense 1 CONTENTS lawns casas E Ee e nt 2 25 IN TIRODUG THON ca 4 2 1 ABOUT ZETA FIXED GAS SESNOR THE GAS 4 2 2 PRINCIPLE 4 2 3 DETECTOR OVERVIEW AND 2 5 2 3 1 DECSRIPTION OF NAVIGATION 5 2 3 2 5 2 3 3 4 eendornensis 6 2 4 INSTRUMENT 7 3 1 Gate dan a aioe 8 31 CONDUCTING SITE SURVEY wis cs ccc 8 3 2 PROPANE GAS SENSE SITTING AND 5 8 3 3 FIXING THE DETECTOR TO THE eter eeeeeeeeeeeaeesaeesaaeeaeeeaeeeaeeeaeee 9 3 4 WIRING THE GAS tended elec 10 3 4 1 IN STAND ALONE MODE 570 aiaia a 10 3 4 2 IN SYSTEM MODE SYS w
9. ai koi ee ede 11 3 5 CONNECTING SOUNDER TO STAND ALONE GAS 11 4 OPERATING THE GAS 524 13 41 5 a 13 4 02 USER GCONTROLS eaten arti 13 4 3 VIEWING THE ALARM 5 13 4 3 1 VIEWING THE ALARM LEVEL AS A STAND ALONE 2 0 22 13 4 3 2 VIEWING THE ALARM LEVEL AS A LOOP 14 4 4 SETTING UP OR ADJUSTING THE PRE ALARM 14 4 5 SETTING UP OR ADJUSTING ALARM 1 15 4 6 SETTING UP OR ADJUSTING ALARM 2 15 2 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense 5 FAULT FINDING AND MAINTENANCE PRACTICES 5 1 VERIFYING INSTRUMENT PERFORMANCE BUMP 5 2 DETECTOR SERVICING AND SENSOR REPLACEMENT 5 9 GENERAL FAULT FINDING 5 5 3 1 STDSAND SY SSFAULT RA a aa daR A aaa 6 TERMINATIONS AND TECHNICAL
10. anel to detectors during loop implementation It is used for data transmission between the panel and loop detectors If you are running a stand alone system you may consider a short pair of link wire to supply 24V from the VAUX2 to VLP2 within the detector This can save cable cost and provide neat wiring GAS SENSE 3 GAS SENSE 2 LOOP LOOP INTO THE CONTROL PANEL LOOP INTO THE CONTROL PANEL 24V FROM PSU S S R ZSC100 LOOP TERMINATION A single loop gas detection system wired in series 3 5 CONNECTING SOUNDER TO STAND ALONE GAS SENSE The detector has a 24V sounder output terminal On the main PCB identify the connection terminals SZONE and SZONE 11 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense e Connect SZONE from the main PCB to the IN terminal of the sounder e Connect the SZONE to the OUT terminal of the sounder e Connect an End of Line resistor 10K across the remaining pair of terminals OUT and IN terminals of the sounder to allow for fault monitoring GAS SENSE PCB SOUNDER TERMINAL ZETA CONVENTIONAL SOUNDER The sounder is energized as soon as the detector goes into an alarm condition To serve its urpose as a warning system the sounder de energizes and or automatically resets immediately the GasSense returns to Normal operation or gas concentration level reduces to zero When a detector associated to the sounder is
11. calibration cap of the detector e Connect one end of the hose to the white nozzle e Insert the other end of the hose to the fixed flow regulator of the gas cylinder e Turn the flow regulator to release gas onto the sensor until detector reads the F S 100 LEL 5 2 DETECTOR SERVICING AND SENSOR REPLACEMENT As part of scheduled maintenance arrange with GLT Exports or your local re seller for replacement sensor when it reaches its working life The removal for maintenance or a failure of any sensor should 17 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense not compromise the safety of the area being protected In compliance to EN 50073 code of practice we recommend a duplication of the detection instrument where continuous monitoring is required Repairs and servicing on the instrument should be carried out in a safe place outside the area being protected 5 3 GENERAL FAULT FINDING 5 3 1 STD AND SYS FAULT The instrument goes into FAULT when no sensor is attached when the sensor fails or when it is not recognized by the central control panel Check the loop wiring and cable terminations to ensure there is no loose connection s Re starting the system often corrects the fault Also confirm that the sensor has not reached its working life Contact GLT Exports to arrange replacement 18 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense
12. e Aminimum spacing distance of 5M 16ft between detectors Position the sensor near any potential leak source or in the path of the gas no more than 1 5m away e Target gas is heavier than air install propane detector as near as 50cm to the ground e Study the site Consider mounting on a pole or on the wall as this is strictly site specific APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense Other installation information for gas detectors where applicable could be obtained from BS EN 50073 1999 code of practice 3 3 FIXING THE DETECTOR TO THE WALL When you have decided the appropriate location for the Gas Sense using Allen keys remove the front cover 115 4mm Place the detector on the wall and drive the four bolts provided through the detector into the wall APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense 3 4 WIRING THE GAS SENSE 3 4 1 INSTAND ALONE MODE STD Gas Sense is powered from 24V Mains via 2 pairs of cable One pair of cable goes to VAUX2 VAUX2 and VAUX2 and the other pair goes to the VLP2 VLP2 and VLP2 connector block 10 APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense GAS SENSE 3 4 2 INSYSTEM MODE SYS The VLP2 terminal is 30V line voltage that runs from control p
13. rs and relays are operated Gas Sense similarly operates as a stand alone detection instrument In this mode of operation the detector displays read gas level within the monitored area on its screen and triggers appropriate alarm level APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense 2 3 DETECTOR OVERVIEW AND INDICATIONS 1 Navigation buttons bar 2 Display bar 3 Alarm level indicators 2 3 1 DECSRIPTION OF NAVIGATION BUTTONS Button Description Use lt Used to leave current menu 1 Adjustment Scroll adjust settings downwards Adjustment Scroll adjust upwards OK Enter Used to confirm actions settings 2 3 2 DISPLAY BAR The status of the monitored area or the detector is displayed on the 2x16 character length screen Propane concentration is displayed as percentage of its lower explosive limit STD GAS NAME SYS GAS NAME APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense 2 3 3 ALARM LEVELS There are 3 alarm levels When the 3 alarm LEDs are red it means the atmosphere is very flammable or toxic with respect to concentration of the target gas APPROVED DOCUMENT NO GLT 217 7 15 ISSUE 1 0 AUTHORIZED DATE 28 05 2012 Zeta Gas Sense 2 4 INSTRUMENT CONSTRUCTION M X 30 CAP SCREWS FRONT COVER FILTER HOUSING DISPLAY BOARD ASSY EARTHING BAR FIXED WITH 2
Download Pdf Manuals
Related Search