BY : SELAMAT SURIYADI

1. GAS DETECTOR BY :SELAMAT SURIYADI

2. Content Of Presentation • Introduction • About Gas Detector • Conclusion

3. Introduction Characteristic of Combustible gases 15 %LEL LEL Gas to Air mixture EXPLOSION 5 %GAS 100 %LEL 4 % GAS 80% LEL 3 % GAS 60 % LEL LEAN 2 % GAS 40% LEL 1% GAS 20% LEL 0 % LEL 0 % GAS

4. Combustible Gas Detection Two types of combustible gas detection are : • Catalytic • Infrared Absorption

5. Catalytic Combustible Gas Oxidizes Wheatstone Bridge Platinum Hydocarbon Resistance Voltage Heat

6. INFRARED DETECTORS REFERENCE RECEIVER MEASURING RECEIVER GAS IR TRANSMITTER RAY SEPARATOR

7. Advantages Of General Monitors • Robust • Simple to operate • Easy to install, calibrate and use • Easily calibrated individually to gases such as hydrogen which cannot be detected using

8. CONCLUSION Use to indicating of presence combustible gas. Use for safety devices.

9. THANK YOU

10. Calibration of General Monitors Calibration may be carried out as follows : 1. “ - - -” 2. “AC” 3. “CP”. 4. “CC 5. “0”.

11. GENERAL MONITORS The General monitors model S4100C is highly reliable .It is designed to measure and display concentration of combustible gases in the range of : 0%-100%(LEL) Where : For CH4 , Alarm = 20% LEL And Action = 50% LEL (API)

12. ESD LOGIC GAS DETECTOR IN EDG AREA FSZ-41 2oo3 Gas Detection in EDG Area FSZ-41 Gas Detection in EDG Area FSZ-41 2oo3 Level 1 Stop and inhibit starting of EDG 7-EDG-3160 Trip instr. air compressor 7-X-3210-A Trip instr. air compressor 7-X-3210-B Trip N2 Generation Package 7-X-3300-B Trip N2 Generation Package 7-X-3300-A Level 2 Close phase-4 plant air utility distr.

13. SPECIFICATION Type: Standard Industrial Hydrocarbon Sensor Model: S4100C Part.N 31100, Eexem II T5, Eexem II T4 Response Time : Typically 6-second time constant when exposed to 50% LEL of methane gas. Electric Classification : NEC and CSA ,class I ,Division I ,group B, C and D

14. VOTING SYSTEM 2oo3

15. Gas detector location and tag numbering There are 3 Gas Detectors,4 Heat Detectors and 2 Fire Detectors On EDG-1360 AREA FSZ-41 HD-9000 HD-9001 HD-9002 HD-9003 FD-9022 FD-9023 GD-9024 on H-6320 GD-9025 on P-6310A GD-9026 on P-6310B Voting system 2oo3

17. General Monitors location Guidelines • Consider how the leaking gas will disperse. • Consider the emission temperature and specific gravity of the gas to be detected. • Select sensor accessories so as to protect the sensor against high wind velocities, rain, dust, hosing down and any other anticipated environmental hazards.

18. SPECIFICATIONS

19. Combustible Material A combustible material is a solid , liquid, or gas that may undergo the chemical reaction of combustion. Combustion occurs when an organic chemical is oxidized to produce energy, water, and carbon dioxide.

20. there are nine Fault conditions that are monitored by the microprocessor, as follows:F2 Failed to Complete Calibration This Fault will occur if the unit is placed in the calibration mode and no gas has been applied within six minutes, or if gas has been left on for more than six minutes. ACTION – Remove gas, if present. Apply the magnet to the GM Logo on the cover to clear the fault. Attempt to calibrate. F3 EEPROM Checksum Error This fault indicates that the contents of the Model S4000C’s program memory have changed. This usually occurs, when powering the unit up after a lightning strike or large voltage transient on the power or signal lines to the unit. ACTION - The unit must be returned to the factory or authorized service center for repair. F4 Sensor Error This fault indicates that either one of the remote sensor leads is open or shorted, or that the sensor has drifted greater than –10%. ACTION - Check the integrity of all sensor connections, and ensure that the cable from the Model S4000C to the remote sensor is not damaged. If all sensor leads are connected properly, attempt to re-calibrate the unit. If calibration fails, replace the sensor and re-calibrate.

21. F5 Unused F6 Low Supply Voltage This fault occurs if the supply voltage at the S4000C drops below +18.5VDC. ACTION - Ensure that the supply voltage is at least +20VDC at the Model S4000C. F7 EEPROM Verification Failure This fault occurs when an attempt to verify the setup/calibration parameters just written to the EEPROM memory fails. ACTION - The unit must be returned to the factory or authorized service center for repair. F8 Failure to Complete Setup This fault occurs if the unit is left in setup mode for more than 6 minutes. ACTION - Exit setup mode. Enter setup mode again if it is necessary to change any user selectable options.

22. F9 Gas Check Period Exceeded If the Model S4000C is left in the gas check mode for more than six minutes without a Test Gas being applied or if test gas is left on the gas check mode for more than 6 minutes, this fault will occur. ACTION - Place the magnet over the GM Logo on the cover to return the unit to normal operation. F10 Switch Error This fault occurs if the remote reset, remote calibrate, or the magnetic switch are closed for more than two minutes. ACTION – Check the wiring on the remote reset and remote calibrate switches. Once the short circuit is cleared, the unit will return to normal operation. If the magnetic switch is shorted, the unit must be returned to the factory or authorized service center for service

23. Calibration of General Monitors Calibration may be carried out as follows : 1. Ensure that the instrument is no combustible gas present at the sensor. 2. Place the magnet on the General Monitors Logo on the Nameplate. wait until “ - - -” for 5 seconds Remove the magnet.The sensor will then display “AC”. 3. Use Portable Purge calibrator with flow rate 300-400ml/min to apply gas at the required concentration level. When the instrument detect the gas it will display “CP”. Wait a seconds When the display become “CC”, and then remove the calibration gas. 4.as the remaining gas in the sensor disperses, the sensor will exit Calibration mode and return to normal operation. The display should read “0”.