public void performActions()
        {
            LJUD.IO      ioType   = 0;
            LJUD.CHANNEL channel  = 0;
            double       dblValue = 0;
            double       valueAIN = 0;        //Analog Voltage Value

            LJUD.CHANNEL tempChannel = 0;     //Channel which the TC/LJTIA is on (AIN0).

            // Variables to satisfy certain method signatures
            int    dummyInt    = 0;
            double dummyDouble = 0;

            double tcVolts = 0, cjTempK = 0, pTCTempK = 0;

            LJUD.THERMOCOUPLETYPE tcType = LJUD.THERMOCOUPLETYPE.K;
            //Set the temperature sensor to a k type thermocouple
            //Possible Thermocouple types are:
            //B = 6001
            //E = 6002
            //J = 6003
            //K = 6004
            //N = 6005
            //R = 6006
            //S = 6007
            //T = 6008


            //Offset calibration:  The nominal voltage offset of the LJTick is
            //0.4 volts.  For improved accuracy, though, you should measure the
            //overall system offset.  We know that if the end of the TC is at the
            //same temperature as the cold junction, the voltage should be zero.
            //Put the end of the TC near the LJTIA to make sure they are at the same
            //temperature, and note the voltage measured by FIO4.  This is the actual
            //offset that can be entered below.
            double offsetVoltage         = 0.4;

            //Open the first found LabJack U6 via USB.
            try
            {
                u6 = new U6(LJUD.CONNECTION.USB, "0", true);                 // Connection through USB
            }
            catch (LabJackUDException e)
            {
                showErrorMessage(e);
            }

            //Constantly acquire temperature readings until a key is pressed
            bool keyPressed = false;

            while (!keyPressed)
            {
                ioType   = 0;
                channel  = 0;
                tcVolts  = 0;
                cjTempK  = 0;
                pTCTempK = 0;

                try
                {
                    //Add analog input requests.
                    LJUD.AddRequest(u6.ljhandle, LJUD.IO.GET_AIN, (LJUD.CHANNEL)tempChannel, 0, 0, 0);

                    //Add request for internal temperature reading -- Internal temp sensor uses
                    //analog input channel 14.
                    LJUD.AddRequest(u6.ljhandle, LJUD.IO.GET_AIN, 14, 0, 0, 0);

                    //Execute all requests on the labjack u6.ljhandle.
                    LJUD.GoOne(u6.ljhandle);

                    //Get all the results.  The first result should be the voltage reading of the
                    //temperature channel.
                    LJUD.GetFirstResult(u6.ljhandle, ref ioType, ref channel, ref dblValue, ref dummyInt, ref dummyDouble);
                }
                catch (LabJackUDException e)
                {
                    showErrorMessage(e);
                }

                //Get the rest of the results.  There should only be one more on the request
                //queue.
                bool finished = false;
                while (!finished)
                {
                    if (ioType == LJUD.IO.GET_AIN)
                    {
                        if (channel == tempChannel)
                        {
                            valueAIN = dblValue;
                        }

                        if (channel == (LJUD.CHANNEL) 14)
                        {
                            cjTempK = dblValue;
                        }
                    }

                    try { LJUD.GetNextResult(u6.ljhandle, ref ioType, ref channel, ref dblValue, ref dummyInt, ref dummyDouble); }
                    catch (LabJackUDException e)
                    {
                        if (e.LJUDError == LJUD.LJUDERROR.NO_DATA_AVAILABLE)
                        {
                            finished = true;
                        }
                        else if (e.LJUDError > LJUD.LJUDERROR.MIN_GROUP_ERROR)
                        {
                            finished = true;
                        }
                        else
                        {
                            showErrorMessage(e);
                        }
                    }
                }


                //Display Voltage Reading
                Console.Out.WriteLine("Analog {0:0}:           {1:0.######}\n", (int)tempChannel, valueAIN);

                //Display the internal temperature sensor reading.  This example uses
                //that value for cold junction compensation.
                Console.Out.WriteLine("U6 internal sensor:  {0:0.0} deg K\n", (double)cjTempK);

                //To get the thermocouple voltage we subtract the offset from the AIN
                //voltage and divide by the LJTIA gain.
                tcVolts = (valueAIN - offsetVoltage) / 51;

                //Convert TC voltage to temperature.
                LJUD.TCVoltsToTemp(tcType, tcVolts, cjTempK, ref pTCTempK);

                //Display Temperature
                Console.Out.WriteLine("Thermocouple sensor:  {0:0.0} deg K\n\n", pTCTempK);

                Thread.Sleep(1500);                      // Short pause

                keyPressed = Win32Interop._kbhit() != 0; // If a key was hit break out of the loop
            }
        }
Beispiel #2
0
        public void performActions()
        {
            LJUD.IO      ioType   = 0;
            LJUD.CHANNEL channel  = 0;
            double       dblValue = 0;
            double       valueAIN = 0;        //Analog Voltage Value

            LJUD.CHANNEL tempChannel   = 0;   //Channel which the TC/LJTIA is on (AIN0).
            double       ainResolution = 0;   //Configure resolution of the analog inputs (pass a non-zero value for quick sampling).
            //See section 2.6 / 3.1 for more information.
            double dblInternal = 0;
            double range       = (double)LJUD.RANGES.BIPP1V;

            // Variables to satisfy certain method signatures
            int    dummyInt    = 0;
            double dummyDouble = 0;

            double tcVolts = 0, cjTempK = 0, pTCTempK = 0;

            LJUD.THERMOCOUPLETYPE tcType = LJUD.THERMOCOUPLETYPE.K;
            //Set the temperature sensor to a k type thermocouple
            //Possible Thermocouple types are:
            //B = 6001
            //E = 6002
            //J = 6003
            //K = 6004
            //N = 6005
            //R = 6006
            //S = 6007
            //T = 6008

            //Open the first found LabJack U6 via USB.
            try
            {
                u6 = new U6(LJUD.CONNECTION.USB, "0", true);                 // Connection through USB
            }
            catch (LabJackUDException e)
            {
                showErrorMessage(e);
            }

            try
            {
                //Configure the desired resolution. See section 2.6 / 3.1 of the User's Guide
                LJUD.eGet(u6.ljhandle, LJUD.IO.PUT_CONFIG, LJUD.CHANNEL.AIN_RESOLUTION, ref ainResolution, 0);

                // Set the range on the ananlog input channel to +/- 0.1 volts (x100 gain)
                LJUD.eGet(u6.ljhandle, LJUD.IO.PUT_AIN_RANGE, channel, ref range, 0);
            }
            catch (LabJackUDException e)
            {
                showErrorMessage(e);
            }

            Console.Out.WriteLine("Press any key to quit\n");

            //Constantly acquire temperature readings until a key is pressed
            bool keyPressed = false;

            while (!keyPressed)
            {
                ioType   = 0;
                channel  = 0;
                tcVolts  = 0;
                cjTempK  = 0;
                pTCTempK = 0;

                try
                {
                    //Add analog input requests.
                    LJUD.AddRequest(u6.ljhandle, LJUD.IO.GET_AIN, (LJUD.CHANNEL)tempChannel, 0, 0, 0);

                    //Add request for internal temperature reading -- Internal temp sensor uses
                    //analog input channel 14.
                    LJUD.AddRequest(u6.ljhandle, LJUD.IO.GET_AIN, 14, 0, 0, 0);

                    //Execute all requests on the labjack u6.ljhandle.
                    LJUD.GoOne(u6.ljhandle);

                    //Get all the results.  The first result should be the voltage reading of the
                    //temperature channel.
                    LJUD.GetFirstResult(u6.ljhandle, ref ioType, ref channel, ref dblValue, ref dummyInt, ref dummyDouble);
                }
                catch (LabJackUDException e)
                {
                    showErrorMessage(e);
                }

                //Get the rest of the results.  There should only be one more on the request
                //queue.
                bool finished = false;
                while (!finished)
                {
                    if (ioType == LJUD.IO.GET_AIN)
                    {
                        if (channel == tempChannel)
                        {
                            tcVolts = dblValue;
                        }

                        if (channel == (LJUD.CHANNEL) 14)
                        {
                            dblInternal = dblValue;
                        }
                    }

                    try { LJUD.GetNextResult(u6.ljhandle, ref ioType, ref channel, ref dblValue, ref dummyInt, ref dummyDouble); }
                    catch (LabJackUDException e)
                    {
                        if (e.LJUDError == LJUD.LJUDERROR.NO_DATA_AVAILABLE)
                        {
                            finished = true;
                        }
                        else if (e.LJUDError > LJUD.LJUDERROR.MIN_GROUP_ERROR)
                        {
                            finished = true;
                        }
                        else
                        {
                            showErrorMessage(e);
                        }
                    }
                }

                //The cold junction is the screw-terminal block where the thermocouple
                //is connected.  As discussed in the U6 User's Guide, add 2.5 degrees C
                //to the internal temp sensor reading.  If using the CB37 rather than
                //the built-in screw terminals, just add 1.0 degrees C.
                cjTempK = dblInternal + 2.5;

                //Display Voltage Reading
                Console.Out.WriteLine("Analog {0:0}:           {1:0.######}\n", (int)tempChannel, valueAIN);

                //Display the internal temperature sensor reading.  This example uses
                //that value for cold junction compensation.
                Console.Out.WriteLine("U6 internal sensor:  {0:0.0} deg K\n", (double)dblInternal);

                //Convert TC voltage to temperature.
                LJUD.TCVoltsToTemp(tcType, tcVolts, cjTempK, ref pTCTempK);

                //Display Temperature
                Console.Out.WriteLine("Thermocouple sensor:  {0:0.0} deg K\n\n", pTCTempK);

                Thread.Sleep(1500);                      // Short pause

                keyPressed = Win32Interop._kbhit() != 0; // If a key was hit break out of the loop
            }
        }