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Summary of Contents for Crowcon Gasman II
- Page 1 Technical Description Gasman II Portable Gas Detector Crowcon Detection Instruments Limited 2 Blacklands Way Abingdon Business Park Abingdon Oxfordshire OX14 1DY United Kingdom...
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Page 2: Table Of Contents
Contents Page 1 Functional Description Page 2 - System Overview Page 2 - Gasman II Block Diagram Page 2 - Gasman II Circuit Description Page 3 Appendix A - Schematic Diagram (Sheet1) Page 5 Appendix A - Schematic Diagram (Sheet2) - Toxic... -
Page 3: Functional Description
PCB to form a 10Hz signal that is used to modulate an RF Monolithics transmitter module. electronic switch LCD display buzzer analogue sensor signal conditioning (ROM & RAM) LEDs power txmtr (optional) Figure 1: Gasman II Block Diagram... -
Page 4: Gasman Ii Circuit Description
J4. IC3 (comparator) is used to extract the data sent by the PC from the common 'signal' wire and Q2 is used to impress the data sent by the Gasman II to the PC onto the 'signal' wire. Varistor, RV1, provides protection against ESD transients. - Page 5 Sheet 3 (Sensor PCB) This is a simple PCB that plugs into the Main PCB via connector J1. It contains the buzzer and the two LEDs along with two sites for a gas sensor. The two sites are necessary to accommodate the two slightly different physical shapes of the gas sensors and are overlaid so as to position each of the gas sensor types in the same place when fitted.
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Page 6: Appendix A - Schematic Diagram (Sheet1)
Appendix A - Schematic Diagram (Sheet 1) -
Page 7: Appendix A - Schematic Diagram (Sheet2) - Toxic
Appendix A - Schematic Diagram (Sheet 2) - Toxic... -
Page 8: Appendix A - Schematic Diagram (Sheet2) - Flammable
Appendix A - Schematic Diagram (Sheet 2) - Flammable... -
Page 9: Appendix A - Schematic Diagram (Sheet2) - Oxygen
Appendix A - Schematic Diagram (Sheet 2) - Oxygen... -
Page 10: Appendix A - Schematic Diagram (Sheet3)
Appendix A - Schematic Diagram (Sheet 3) -
Page 11: Appendix A - Schematic Diagram (Sheet4)
Appendix A - Schematic Diagram (Sheet 4) -
Page 12: Appendix B - Parts List (Sheet 1)
Appendix B - Parts List (Sheet 1) This appendix gives the parts list for the GasmanII Portable Gas Detector CPU/display PCB. For each circuit reference a description of the component is given and, where appropriate, its case style is listed. Circuit Ref. -
Page 13: Appendix B - Parts List (Sheet 2) - Toxic
Appendix B - Parts List (Sheet 2) - Toxic This appendix gives the parts list for the GasmanII Portable Gas Detector Main PCB - Toxic version. For each circuit reference a description of the component is given and, where appropriate, its case style is listed. Circuit Ref. -
Page 14: Appendix B - Parts List (Sheet 2) - Flammable
Appendix B - Parts List (Sheet 2) - Flammable This appendix gives the parts list for the GasmanII Portable Gas Detector Main PCB - Flammable version. For each circuit reference a description of the component is given and, where appropriate, its case style is listed. Circuit Ref. - Page 15 9 9 14 150R 0.4W 2% 200ppm Nickel Barrier Resistor 1210 150R 0.4W 2% 200ppm Nickel Barrier Resistor 1210 10k 0.1W Preset Varistor 1206...
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Page 16: Appendix B - Parts List (Sheet 2) - Oxygen
Appendix B - Parts List (Sheet 2) - Oxygen This appendix gives the parts list for the GasmanII Portable Gas Detector Main PCB - Oxygen version. For each circuit reference a description of the component is given and, where appropriate, its case style is listed. Circuit Ref. -
Page 17: Appendix B - Parts List (Sheet 3)
Appendix B - Parts List (Sheet 3) This appendix gives the parts list for the GasmanII Portable Gas Detector Sensor PCB. For each circuit reference a description of the component is given and, where appropriate, its case style is listed. Circuit Ref. -
Page 18: Appendix B - Parts List (Sheet 4)
Appendix B - Parts List (Sheet 4) This appendix gives the parts list for the GasmanII Portable Gas Detector Low-Power Transmitter PCB. For each circuit reference a description of the component is given and, where appropriate, its case style is listed. Circuit Ref.
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