To browse Academia. Skip to main content. Log In Sign Up. Briscoe and W. Your setup may have slight differences. Introduction The purpose of the exercise is to give you some experience using LabVIEW for automatic, computer-based data collection from an experiment.

You will be measuring the internal temperature of a grape or similar object as a function of time as it is plunged into a glass of ice water.

Using the collected data, you will determine the time constant of the heat transfer dynamics that model the temperature drop.

What You Will Need 1. USB cable 4. Thermistor temperature sensor NTC, 10K ohms, jameco. Digital multi-meter that can read resistance 6. Solderless breadboard 7. A 10K ohm resistor 9. A grape, or other small fruit, at room temperature In order for Equation 1 to work, absolute temperatures Kelvin units must be used. The thermistor used in this project, jameco. Hint: squeeze the DMM leads hard against the thermistor leads for an accurate resistance reading.

See how close the measured value of R is to the theoretical value from Equation 1. You may see the resistance measurement drifting due to self-heating from the current through the thermistor provided by the DMM.Go to Solution. I have no knowledge of labview and I was given a school project to". Design and implement a Thermistor temperature measurement system that will interface with LabView on a PC for graphical display.

The system should be able to measure temperature between 20 o C and 70 o C and display the measurement on the PC.

how to measure temperature using labview

From your explanation, how do I achieve the same thing i. I followed the example finder but did not find any examples for temperature under the compactRIO. One example can be accessed in the "Find Example United States. Real-Time Measurement and Control.

Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for. Search instead for. Did you mean:. Message 1 of Re: temperature measure with labview on four location using NTC thermistor. NI Employee. Koeyes, First, it is not recommended to post your email address in a discussion forum.

The National Instruments forums are public venues for solving problems and posting ideas. Second, you are going to have to go into much more detail for anyone to help with your issue. Can you measure successfully in the Measurement and Automation Explorer? With more information we can easily help you accomplish your task. Message 2 of Accepted by topic author koeyers. Hi, My project is measure temperatures from a thermistor on 4 difference place.

For the sensor i must use only NTC thermistor. I must make a appllication with Labview. I am new with this. Can some one can help me with circuits of sensor. How can use DAQ with the thermistor. Please some one give some idea. Message 3 of Active Participant. Message 4 of Recommend Documents. Using PIV to measure granular temperature in USB Device interface. An example of In advanced applications, the. Using a Helicopter to Measure River Discharge. Using Micromechanical Resonators to Measure.

Using coherence to measure regional. Supraclavicular Skin Temperature as a Measure of Jun 12, - Core body temperature was measured continuously in the small Upon arrival, subjects BAT has emerged as a novel player in energy homeostasis in.

how to measure temperature using labview

The warranty provided herein does not cover damages, defects. Problems associated with using Fura-2 to measure free Problems associated with using Fura-2 to measure free intracellular calcium concentrations in human red blood cells.

Download PDF. You will do This way Briscoe and W. Your setup may have slight differences.

Weather Station using Arduino and LabVIEW

Introduction The purpose of the exercise is to give you some experience using LabVIEW for automatic, computer-based data collection from an experiment. You will be measuring the internal temperature of a grape or similar object as a function of time as it is plunged into a glass of ice water. Using the collected data, you will determine the time constant of the heat transfer dynamics that model the temperature drop. What You Will Need 1. USB cable 4. Thermistor temperature sensor NTC, 10K ohms, jameco.

Digital multi-meter that can read resistance 6. Solderless breadboard 7. A 10K ohm resistor 9. A grape, or other small fruit, at room temperature In order for Equation 1 to work, absolute temperatures Kelvin units must be used.

Example Code

The thermistor used in this project, jameco. Hint: squeeze the DMM leads hard against the thermistor leads for an accurate resistance reading. See how close the measured value of R is to the theoretical value from Equation 1. You may see the resistance measurement drifting due to self-heating from the current through the thermistor provided by the DMM. You will construct a voltage divider circuit to measure resistance. R1 is a 10K ohm resistor.

Temperature Control Using Arduino and Labview

R is the thermistor whose resistance varies with temperature. V is the output voltage that will be sampled by the data acquisition unit.A constant, known current is applied across the thermistor and the voltage drop across the thermistor is recorded.

By using Ohm's Law, this voltage and current can be used to determine the resistance of the thermistor, which varies with temperature. This resistance is then used to calculate temperature using the polynomial equation listed in the sensors specifications document.

The thermistor is wired in a circuit as a resistor. It requires a positive input on one side and a negative input on the other side; the orientation is not important. The user interface we created both shows the current temperature measurement taken as well as plotting the values over time on a waveform chart. Temperature Chart stores previous values so that you can see the change in values over time.

This value is converted to a temperature using the polynomial equation from the thermistor specifications referenced at the end of this document. Finally, we will output the result to a numeric indicator and a temperature chart on the front panel. After locating the PNG file, just drag the file icon onto a blank block diagram, as if you were dragging the file onto your desktop. Inside the while loop on the left is the DAQ Assistant. Once a value is read it is passed down the wire where it is divided by and then the natural log is taken of the quotient before being passed into the formula node.

The resistance is then further converted into a temperature in Kelvin using the supplied polynomial equation and constants from the sensor specifications sheet, referenced at the end of this document. All of the code inside the While Loop continues to run until the Stop button is pressed on the front panel. The Wait VI top right delays execution of the while loop to every ms.

Therefore the sampling rate is 2 samples per second, or 2 Hz.

LABVIEW: Temperature Control

The following steps walk through the configuration of the DAQ Assistant from scratch:. United States. Example Code. Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for. Search instead for. Did you mean:.

how to measure temperature using labview

Virus scan in progress. Please wait to download attachments. Be sure to place it in the loop and be sure to append new data to the spreadsheet file. You can use a comparison operation to output a true or false if a value is greater than another number.Hello friends! I hope you all will be absolutely fine and having fun. At these places to sense the temperature and its proper indication is compulsory because it can cause serious problems otherwise.

For example, if the temperature in the food storage room is higher than an adjusted threshold, it will be harmful for all of the food items. First of all it measures the level of the temperature. If it founds that the temperature is higher than the adjusted threshold, it starts to beep, which is very helpful in order to avoid a lot of disasters. Three different threshold ranges are adjusted for sensing low, moderate and high temperature level.

You can change theses threshold ranges manually. I hope you enjoyed this tutorial. I will explain the further details in the later tutorials. I am a programmer since before that I just search things, make small projects and now I am sharing my knowledge through this platform. I also work as a freelancer and did many projects related to programming and electrical circuitry.An NTC Negative Temperature Coefficient Thermistor is a passive electrical component whose resistance varies inversely with temperature.

Simply attach the myDAQ ohmmeter probes to the thermistor which can be placed optionally onto the breadboard.

The resistance measured by the myDAQ is also displayed. The interface graphically outputs the calculated temperature in Kelvin, Celsius, and Fahrenheit. Each component on the Front Panel is graphically represented in the block diagram. The image shows how the variable inputs from the front panel and the myDAQ are passed through a graphical representation of the beta formula and then output as temperature values.

In this experiment, we measured the temperature under the following scenarios: room temperature, surrounding the thermistor with a bag of ice, and grasping it while blowing hot breath on it. This is a relatively easy experiment that can serve as a good introduction to circuit elements, data acquisition, and LabVIEW programming. Hi, excellent guide.

I used a Pixsys ntc themristor for my own project and it works very well. Thank you for this guide that help me a lot. Powered by WordPress and Manifest. Findings In this experiment, we measured the temperature under the following scenarios: room temperature, surrounding the thermistor with a bag of ice, and grasping it while blowing hot breath on it. Published: February 1, Filed Under: ElectronicsMath and Science.For this purpose, we will connect a LM35 and a light sensor for our weather station, which will measure temperature and intensity of light in real time and using LabIEW interface it will be displayed on panel of our weather station.

We will divide our weather station project in following steps. In our weather station, LM35 is a sensor used to measure the temperature of surrounding.

Real-Time Measurement and Control

The output is actually an analogue voltage which corresponds to surrounding temperature when multiplied by In our weather station, Light dependent resistor is used to detect change in light intensity or as a light sensor. LDR is basically a variable resistor. LDR resistance changes with the change in intensity of light. When intensity of light decreases, LDR offers high resistance.

Hence there is inverse relationship between intensity of light and resistance of LDR. So LDR is used as a light sensor. Now the question comes to mind, how to measure resistance which in return can be used to calculate intensity of light. All analog to digital converters can measure voltage only. These channels cannot measure resistance directly. But resistance can be measured indirectly by converting it into voltage form.

This is basically called signal conditioning. This circuit is used to convert resistance into voltage form. Voltage measured across LDR can be measure with the help of analog to digital converter of Arduino.

This measured voltage can be converted back into resistance using voltage division formula. In this section, we will discuss wiring diagram of this project and show a complete circuit diagram. This completes our circuit for weather station measuring temperature and light intensity. It is the serial port you are using for interfacing of Adruino. In my case it is COM4.