Summary of Contents for SGX Sensortech IR-EK2
- Page 1 SGX Infrared Gas Sensor Evaluation Kit IR-EK2 User Guide SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013...
- Page 2 Sensortech does not accept responsibility for damage or injury resulting from failure to follow the instructions provided. WARNINGS: The Evaluation Kit is despatched from SGX Sensortech in a safe condition. Any unauthorised • modifications may compromise safety and invalidate the warranty.
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Page 3: Table Of Contents
Appendix: Evaluation Kit PCB Parts List ..................20 Appendix: Serial Message Protocol ..................... 21 Appendix: China RoHS Declaration ..................... 24 Appendix: Updating the IR-EK2 Embedded Software ..............25 SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 3... -
Page 4: Introduction
Additional gas flow hoods may be ordered using the part number: JAS767906AA • If you are not familiar with the principles of gas detection using infrared absorption, you are strongly recommended read Infrared Application Notes available www.sgxsensortech.com SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 4... -
Page 5: Quick Start Guide
The PC may take a minute to recognise and initialise the new hardware drivers. Basic Interfaces and Controls of Evaluation Kit To PC (8 Pin) 9V DC (6/7 Pin) From SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 5... - Page 6 ‘Measurement Mode’ to ‘Device Setup Mode’ using the PC Software. e. Refer to the relevant sections of the User Guide for detailed instructions on how to do the above. SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 6...
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Page 7: Using The Sgx Data Logging Software
By default, the datalogging software autoscales the output readings (i.e. the graph axes expand to show all of the readings on x and y axes). However, it is possible to change these values in order to ‘zoom in’ on certain readings. SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 7... - Page 8 The ‘Hardware’ menu contains an Update Firmware feature which allows software updates to be loaded into the microprocessor without having to return the PCB to SGX for reprogramming. This feature should be used carefully following the instructions in section 18. SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 8...
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Page 9: Using Hyperterminal
Select the correct ‘COM Port’ being used by the USB • Driver: Select 9600 Bits per second (Baud), 8 data bits, no • parity, 1 stop bit, no flow control: SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 9... - Page 10 Note that if the Evaluation Kit is already set in ‘Measurement Mode’ then a data packet will be displayed once per second. A full list of HyperTerminal commands can be found in Section 16. SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 10...
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Page 11: User Interfaces, Controls And Indicators
Board. The socket will connect to a Texas Instruments MSP430 Debug Interface, e.g. MSP-FET430UIF, for reprogramming and debugging. VCCO VCCI Unused Unused 10 Unused TRST 11 12 Unused Unused 13 14 Unused SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 11... -
Page 12: Expansion Port (Pl2)
5.9 Reset Switch (SW2) Press and release SW2 to reset the microcontroller. This has the same function as removing and reconnecting the power supply. PCB Layout: SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 12... -
Page 13: Operating Modes
In order to take readings from the Evaluation Kit it must be in Measurement Mode. The PC Software will automatically switch the IR-EK2 into Measurement Mode when it is first connected, even if it was previously left in Device Setup Mode. -
Page 14: Lamp Drive
Some users reduce this current surge by biasing the bulb at about 0.4 V when ‘off’ to keep it just warm. This can be done on the IR-EK2 by fitting a 330R 0805 resistor in the empty R27 position (between VR0 and VR3). -
Page 15: Channel Gains
8 Channel Gains A gas sensing instrument normally has fixed channel gains. However, the IR-EK2 is designed to operate with a wide range of sensors having different output levels so adjustable gain settings have been provided for optimum performance. The channel gains should be adjusted after setting the lamp voltage as follows: VR0 –... -
Page 16: Sensor Set-Up
Some sensors have no integrated temperature sensor and so the PCB mounted sensor should be selected. The following options are available: Temperature External IC - uses IC temperature sensor on the IR-EK2 PCB Sensor • Internal Thermistor (Twin Gas) – thermistor on twin gas devices •... -
Page 17: Calibration
(Note: DAC 0 V - 2.048 V output corresponds to 0 V – 3 V input range) Channel A/B Conc: DAC tracks the Concentration value (Note: DAC 0 V - 2.048 V output corresponds to Zero – Span input range) SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 17... -
Page 18: Alarm Outputs And Leds
Evaluation Kit. The status of each digital input can be viewed on the ‘I/O’ tab which is only present in ‘Device Setup Mode’ SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 18... -
Page 19: Appendix: Evaluation Kit Pcb Schematic Diagram
14 Appendix: Evaluation Kit PCB Schematic Diagram SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 19... -
Page 20: Appendix: Evaluation Kit Pcb Parts List
+/-20ppm 7.0pF Transistor MOSFET P-Channel SOT23 Fairchild FDN338P Components not fitted: Capacitor Ceramic 0603 C5, C6 Resistor SMD 0603 R14, R33 Resistor SMD 0805 Crystal HC49/4H SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 20... -
Page 21: Appendix: Serial Message Protocol
Set Alarms Command Response Notes Available in mode Manual On [EK2 AL1 MAN [ACK] Set-up (individual: 1-4) ONX] (all together: 0) [EK2 AL2 MAN [ACK] Set-up ONX] SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 21... - Page 22 [EK2 CAx N2 [ACK] aaa x 10 Set-up co-efficient n = aaaa] A = Channel A [EK2 CAx N3 [ACK] Set-up B = Channel B aaaa] SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 22...
- Page 23 Set-up concentration B = Channel B range parameters Use high [EK2 CAx RHI] [ACK] A = Channel A Set-up concentration B = Channel B range parameters SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 23...
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Page 24: Appendix: China Rohs Declaration
X: Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials used for this part is above the limit requirement in SJ/T11363-2006 SGX Sensortech(IS) Ltd Registered in England No.08067077 DAS767840AA Version 3, August 2013, Page 24... -
Page 25: Appendix: Updating The Ir-Ek2 Embedded Software
1. Download the firmware zip file. Unzip and save the text file (ir_ek2_..txt) to the computer hard drive. 2. Connect up the IR-EK2 evaluation kit to the PC via the USB lead and connect the power. 3. Run the PC software (installed from the supplied CD) 4.
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