I’m an engineer, 20 + years experience in automation and have worked all over the world, now a fully chartered engineer and I watch these very well presented videos with great interest!..... you guys do such a great job in conveying the content in a very easy to understand way which will hopefully bring new talent to an industry that is lacking in folks showing interest in the area.... AAESOME JOB!!!! 🤙🏻
Hey! Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us. Happy learning!
Normally load cells are installed on a tank in a array of 3, 4, 5, or 6 load cells, depending on the size of the tank and the total load. To calibrate, dead weights of know weight are place on the tank to simulate loading of the tank. The load cell response is recorded and the measured weights are compared to the actual weight placed on the tank. The measured weight is a sum of the weights detected by each load cell. In an ideal weight distribution, all load cells should see exactly the same load, but this is hardly ever the case. If the output from one load cell is faulty, it can be isolated by measuring the voltage at that cell in the summing junction. Because the weight response from "empty" to full can be non-linear, the tank level can be programmed as function rather than through linear scaling. The dead weights on hand should represent about 10% of the total live load (weight in tank at 100% full). Starting at empty, place the weights on the tank and record the value. Then remove the weights and fill the tank until the weight indicated matches that recorded with the weights on (replace the dead weight with water weight). Add the dead weights back and repeat the process through the entire range. Once complete, re-scale the output so that the weight indicated at 100% output matches the actual weight applied. If the progression from 0% to 100% is non-linear, use the curve to program a calculation of weight in the PLC.
hello, This is a great video to gather so much information about load cell. I'm developing a PLC based automatic weigh feeder & i have to show flow rate in Kg/hr . so can i use this formula: {weight(mv) * speed (mtr/sec) * 3600} / {platform length(mtr)} ** i have used 4 load cell connected in parallel to distributed the load of platform ** speed is getting using proxy pulse and calculate it using the roller circumference.
Thank you for this explanation! For my school project, we need to construct a very small dimension thru-hole load cell to measure a heatsink screw's clamp force (~50 lbf). Which route would you recommend?
A thru-hole donut load cell is not inexpensive, and it will require an amplifier/electronics to complete the measurement package. For a school project, I would construct a weighing system with a half-bridge load cell using an Arduino or other inexpensive micro-controller. Search the web for "half-bridge load cell".
Load cells develop millivolt signals that much be connected to an amplifier junction or some other device to convert the signals to a usable range in industrial applications since load cells cannot be directly connected to PLC I/O. When a summing junction is used, the resultant signal is typically a 4-20ma signal, which is just like any other analog input to the PLC. On the subscription site (realpars.com) we have several instructional videos on how to wire and interface analog inputs to a PLC.
Great video! But the narrator is pronouncing "Wheatstone bridge" incorrectly. He is saying "wet stone." The device is named after an Englishman, Charles Wheatstone. That's pronounced "wheat-stone." Or, you can say it the way the English pronounce it: /ˈwiːtstən/ (Wheat-sten) where the "e" in "sten" is barely pronounced or skipped altogether. .
Hi Basaihou, Thanks for your comment! We currently only provide our course videos in English, you are always able to turn on the English subtitles as that might make it a bit easier for you. Thanks for sharing your feedback, we appreciate that! Happy learning!
Hi Nazim, We have the following video courses on Analog, in case you missed those. "PLC Analog Inputs and Signals" bit.ly/2U6seL3 "What is Analog Automation?" bit.ly/2NzmpVa Additionally, we have lots of course videos on Analog in our course library. bit.ly/2L1RDSe I will definitely forward your topic suggestion regarding a video course on Analog and Digital Load Cell to our creator team. Happy learning!
Many reputable manufacturers provide precision belt conveyors. Mettler-Toledo, Acrison, Rice Lake, Milltronics, B&H, and Hardy are all very good manufacturers. Check with each to determine which provides a model that is right for your application.
Good video. You explain the different type of load cells, and they're great. But I think it would be a good idea if you stated which load cell is being used in your examples. Given that load cells are the main topic. I'm not sure, but the first load cell is using a Capacitive Load Cell?
Thank you for your comment. In the first example, it is likely that the load cell is a capacitance load cell since it best suited for accuracy and precision at low weights (
I didn't know the type of load cell we've been using in our industry until watching this video. Thank you so much realpars team. You've really improved my automation skills
Ok Sir I am Doing a Control system Project please tell me how We write Matrixes multiplication in PLC ladder logic ? Or how can we convert matlab code into PLC ladder logic ?
Matrix calculations in the PLC are most efficiently done in SCL. It could be done in ladder with some patience and determination. There is a set of example programs and documentation on the Siemens Support website that will support what you need, although the FC's are in SCL. If you don't have the SCL editor package add-on, you can still open the FC's in the ladder editor for viewing. You would then need to translate the logic into ladder. support.industry.siemens.com/cs/document/29851674/tool-collection-of-functions-for-bit-number-and-mathematical-operations?dti=0&lc=en-WW The only way I know of to convert Matlab to ladder logic is with a product called Simulink PLC Coder. From the comments I find online, it is not 100% efficient and may require additional massaging of the program after conversion.
4000kg. Each cell is capable of weighing 1000kg. Four cells of 1000kg capacity allow 4000kg to be weighed. The four cells are wired to a summing box, which "adds" the signals from the four cells together.
Hi Saad, Thanks for your comment! Regarding your question, I am actually not sure about that, as our imagery is created by our graphic and animation department.
Bridge-based sensors typically specify their rated output in millivolts per volt (mV/V), where mV/V is the ratio of output voltage to the excitation voltage required for the sensor to work. Strain gauge sensors provide a voltage output that is proportional to the excitation voltage.
Hi Umut! We currently have the following two subscription packages: - Monthly subscription package $19.99 a month - Yearly subscription package $119,- ($9.99 a month) billed once You can subscribe through the following link bit.ly/2IpeCp3 Feel free to browse through our course library to see all the different topics we are covering. bit.ly/30AVJaR Let me know if I could be of any further assistance. Happy learning!
This type of load cell (electromagnetic) is often used in balances, scales, and check weighers to detect relatively small weights. I believe this type of load cell would be in a fifth category since it does not fit into the four categories described in this video.
Thanks for your comment and suggestion! I will happily go ahead and pass that on to our course developers as a topic suggestion for possible future video courses. Thanks again and happy learning!
At my knowledge the principe is the variation of resistance and after we can add a circuit with power supply and we get analogic signal if it's not connected to computer or plc if not we can use a dc or if plc receives analogic signal we don't convert the signal with adc
Thanks real pars . We having issues at work with our liquid carbon dioxide storage tanks , we can't pick exact co2 in the tank so would calibrating them work ?
Yes, liquid CO2 flashes and causes a lot of problems with measuring level with probes or differential pressure sensors. Load cells are the best choice to measure CO2 level in a tank, and a well-calibrated system is the first step towards providing an accurate measurement. I would have a proferssional scale company come do the calibration, especially if you using the weights for trade. The professional scale companies have the best test and diagnostic equipment available to tune-up your scale systems. It is well worth the cost!
Hola Edwin, ¡Gracias por tu comentario! Actualmente solo proporcionamos nuestros videos del curso en inglés, siempre puede activar los subtítulos en inglés, ya que eso podría facilitarle un poco la tarea. Nuestras disculpas por cualquier inconveniente! ¡Feliz aprendizaje!
Hi Hari, Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! Great to hear your enthusiasm about joining our online courses! You obtain full access to our complete course library (400+ video courses) by subscribing through the following link bit.ly/2IpeCp3 If you ever have any questions, feel free to reach out to us. Happy learning!
Thank you. I'm thinking about doing an independent project where it'll probably require me to understand how weight scales work and maybe even build one. This gave me a nice beginner's insight
I’m an engineer, 20 + years experience in automation and have worked all over the world, now a fully chartered engineer and I watch these very well presented videos with great interest!..... you guys do such a great job in conveying the content in a very easy to understand way which will hopefully bring new talent to an industry that is lacking in folks showing interest in the area.... AAESOME JOB!!!! 🤙🏻
Hey!
Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us.
Happy learning!
@@realpars I hear non-contact , radar based technology is the way to go!
Hey bro
I'm going to install polltrey feed making system.
Where i do put the weight cell under the mixer or under each of 3 silos
@@chagaarbellal4983 have you implemented it if yes can you please share details
Simple, Focused, and excellent presentation. Made me learn the core concept in a few minutes. Thank you!!!!
Glad it was helpful! happy learning
Thank you very much for your videos
You are very welcome, Younes! Happy learning.
could you please explain to us how to calibrate the strain gauge LC
Normally load cells are installed on a tank in a array of 3, 4, 5, or 6 load cells, depending on the size of the tank and the total load. To calibrate, dead weights of know weight are place on the tank to simulate loading of the tank. The load cell response is recorded and the measured weights are compared to the actual weight placed on the tank. The measured weight is a sum of the weights detected by each load cell. In an ideal weight distribution, all load cells should see exactly the same load, but this is hardly ever the case. If the output from one load cell is faulty, it can be isolated by measuring the voltage at that cell in the summing junction. Because the weight response from "empty" to full can be non-linear, the tank level can be programmed as function rather than through linear scaling. The dead weights on hand should represent about 10% of the total live load (weight in tank at 100% full). Starting at empty, place the weights on the tank and record the value. Then remove the weights and fill the tank until the weight indicated matches that recorded with the weights on (replace the dead weight with water weight). Add the dead weights back and repeat the process through the entire range. Once complete, re-scale the output so that the weight indicated at 100% output matches the actual weight applied. If the progression from 0% to 100% is non-linear, use the curve to program a calculation of weight in the PLC.
Absolutely amazing explanation. Thanks a lot for the video and your effort in making us understand.
Happy to hear that, Sai! Thanks for sharing.
I hear non-contact , radar based technology is the way to go!
hello,
This is a great video to gather so much information about load cell.
I'm developing a PLC based automatic weigh feeder & i have to show flow rate in Kg/hr . so can i use this formula:
{weight(mv) * speed (mtr/sec) * 3600} / {platform length(mtr)}
** i have used 4 load cell connected in parallel to distributed the load of platform
** speed is getting using proxy pulse and calculate it using the roller circumference.
Most of all companies using strain gauge load cells
Thank you for this explanation! For my school project, we need to construct a very small dimension thru-hole load cell to measure a heatsink screw's clamp force (~50 lbf). Which route would you recommend?
A thru-hole donut load cell is not inexpensive, and it will require an amplifier/electronics to complete the measurement package. For a school project, I would construct a weighing system with a half-bridge load cell using an Arduino or other inexpensive micro-controller. Search the web for "half-bridge load cell".
It's awesome. Thank you for your effort and time you put on making such a great educational video.
Thanks for your support, Ali! Appreciate that
Nice explanation but are there any examples for the paying subscribers on HOW to code a weigh/load cell in e.g. TIA Portal?
Load cells develop millivolt signals that much be connected to an amplifier junction or some other device to convert the signals to a usable range in industrial applications since load cells cannot be directly connected to PLC I/O. When a summing junction is used, the resultant signal is typically a 4-20ma signal, which is just like any other analog input to the PLC. On the subscription site (realpars.com) we have several instructional videos on how to wire and interface analog inputs to a PLC.
Best presentation in TH-cam, both by animation and explanation.
Many thanks, Rahat!
Great video! But the narrator is pronouncing "Wheatstone bridge" incorrectly. He is saying "wet stone." The device is named after an Englishman, Charles Wheatstone. That's pronounced "wheat-stone." Or, you can say it the way the English pronounce it: /ˈwiːtstən/ (Wheat-sten) where the "e" in "sten" is barely pronounced or skipped altogether. .
Thanks for sharing your knowledge with us! I will forward this to our course developers.
6:47 the pressure in the hydraulics determine this not a load cell. but apart from that wherry professional made videos 👍
thanks a lot, very useful information as always.
Great to hear that! You are very welcome.
The best presentation.. I not only learnt the load cell working & types but also how to make technical presentation. Keep it up and all the best. 👍🏻
Thank you very much! We're very happy to hear that.
Nice video. Would be very nice if this videos are done in other languages e.g in German language.
Hi Basaihou,
Thanks for your comment! We currently only provide our course videos in English, you are always able to turn on the English subtitles as that might make it a bit easier for you.
Thanks for sharing your feedback, we appreciate that!
Happy learning!
Thanks for this video , I uderstand the principle of load cell .
That's amazing, thanks for your support!
Thank you very much
Kindly make a vedio on analog and digital load cell.
Hi Nazim,
We have the following video courses on Analog, in case you missed those.
"PLC Analog Inputs and Signals" bit.ly/2U6seL3
"What is Analog Automation?" bit.ly/2NzmpVa
Additionally, we have lots of course videos on Analog in our course library. bit.ly/2L1RDSe
I will definitely forward your topic suggestion regarding a video course on Analog and Digital Load Cell to our creator team.
Happy learning!
greetings from BENGHAZI Libya
Greetings back! Happy learning, Abdelrazek!
RealPars, could you please provide some explanations of Gas Chromatography in details,??
Hey!
Thanks for sharing your suggestion with us! I have sent this over to our course developers.
Happy learning!
@@realpars Thanks❤️❤️❤️
Hello, which type do you recommend for a Belt conveyor scale used in a bulk fertilizer warehouse ? for maximum accuracy. Thanks for the video
Many reputable manufacturers provide precision belt conveyors. Mettler-Toledo, Acrison, Rice Lake, Milltronics, B&H, and Hardy are all very good manufacturers. Check with each to determine which provides a model that is right for your application.
excellent video congratulations for your channel greetings from venezuela
Thanks a lot, Alexs!
Let us know if you have any questions!
Thank you . Kalau bisa ada sub translate Indonesi nya. ( Im from indonesia)
You are very welcome! Happy learning, Meong!
Good job
Thank you!
Good video. You explain the different type of load cells, and they're great. But I think it would be a good idea if you stated which load cell is being used in your examples. Given that load cells are the main topic.
I'm not sure, but the first load cell is using a Capacitive Load Cell?
Thank you for your comment. In the first example, it is likely that the load cell is a capacitance load cell since it best suited for accuracy and precision at low weights (
@@realpars Makes sense, thanks!
I didn't know the type of load cell we've been using in our industry until watching this video. Thank you so much realpars team. You've really improved my automation skills
You are very welcome, Calvince! Happy to hear that our course video has been so helpful to you!
Happy learning!
Very usefull. Incredible video. Thank you.
Great to hear that. Happy learning!
@RealPars ; can you please make a video a bout Tank Calibration Using load cells .
Thanks for your topic suggestion! I will happily go ahead and forward this to our course developers.
Ok Sir I am Doing a Control system Project please tell me how We write Matrixes multiplication in PLC ladder logic ?
Or how can we convert matlab code into PLC ladder logic ?
Yeah, that is going to be a nightmare. A full IEC 61131 development environment (so you can use structured text) is much more appropriate.
Matrix calculations in the PLC are most efficiently done in SCL. It could be done in ladder with some patience and determination. There is a set of example programs and documentation on the Siemens Support website that will support what you need, although the FC's are in SCL. If you don't have the SCL editor package add-on, you can still open the FC's in the ladder editor for viewing. You would then need to translate the logic into ladder.
support.industry.siemens.com/cs/document/29851674/tool-collection-of-functions-for-bit-number-and-mathematical-operations?dti=0&lc=en-WW
The only way I know of to convert Matlab to ladder logic is with a product called Simulink PLC Coder. From the comments I find online, it is not 100% efficient and may require additional massaging of the program after conversion.
really very nice and good channel
thanks for your efforts
Thanks a lot for your support! We really appreciate that.
Let us know whenever you have any questions!
Scale with 4 load cell (1000kg eich cell).. The max weigth of this scale is 1000 or 4000 kg??
4000kg. Each cell is capable of weighing 1000kg. Four cells of 1000kg capacity allow 4000kg to be weighed. The four cells are wired to a summing box, which "adds" the signals from the four cells together.
Very well made video, thank you
Great to hear that! Happy learning.
Piezoelectric force cell?
yes exactly
Piezoelectric sensors, as far I know, cannot measure static loads like weight
Great mind keep you learning
Hey, I woud like to ask you what software or website you use to visualize these devices ?
Hi Saad,
Thanks for your comment! Regarding your question, I am actually not sure about that, as our imagery is created by our graphic and animation department.
Hello Dear.
Good job.
Can you explain to me the mv/v in a load cell..
Bridge-based sensors typically specify their rated output in millivolts per volt (mV/V), where mV/V is the ratio of output voltage to the excitation voltage required for the sensor to work. Strain gauge sensors provide a voltage output that is proportional to the excitation voltage.
@@realpars THANKS SO MUCH
Just awesome how good are those videos.Congratulations!
Great compliment! Thanks a lot for sharing.
Thanks for your video. I am the load cell manufacturer in China. More people knows about load cells now!
This channel is great
Thanks for your support, Juan! Happy learning!
I don't know how I should thank you and the entire team of realpars. great work guys. keep it high
We truly appreciate your support, Avadhoot! Thanks a lot for sharing.
I hear non-contact , radar based technology is the way to go!
@@realpars
L
Amazing video sir
Thank you!
Thanks part of my project required this
good information sir thanks
Thanks for your support, Jermans! Happy learning.
Thanks 🙏🏻, your presentations make my day..
Amazing to hear! Thanks for sharing.
@@realpars I hear non-contact , radar based technology is the way to go!
Thank you REALPARS
You are very welcome! Happy learning.
9 $ or 19 $ for month ?
Hi Umut!
We currently have the following two subscription packages:
- Monthly subscription package $19.99 a month
- Yearly subscription package $119,- ($9.99 a month) billed once
You can subscribe through the following link bit.ly/2IpeCp3
Feel free to browse through our course library to see all the different topics we are covering. bit.ly/30AVJaR
Let me know if I could be of any further assistance.
Happy learning!
well done
Thanks a lot, Mohammed!
fantastic lezion
Thanks a lot, Raffaele!
Thanks for the great video, one query please, Electro magnetic type of load cell falls in to which category out of these four
This type of load cell (electromagnetic) is often used in balances, scales, and check weighers to detect relatively small weights. I believe this type of load cell would be in a fifth category since it does not fit into the four categories described in this video.
Could you explain how the impact flow meter works? Thank you
Thanks for your comment and suggestion! I will happily go ahead and pass that on to our course developers as a topic suggestion for possible future video courses.
Thanks again and happy learning!
Amazing explanation !!
Thank you, Maulana!
Thanks.... But what type of output signal he supporting 4 to 20 ma or 0 to 10 volt or what
Capacitive and strain type load cell supports both typeof signals
Thank you sir
At my knowledge the principe is the variation of resistance and after we can add a circuit with power supply and we get analogic signal if it's not connected to computer or plc if not we can use a dc or if plc receives analogic signal we don't convert the signal with adc
S=(dR/R)/(dl/l) with A sensibility, R is resistance and I is the longer of gauge resistance
Derin A. Maleek check my answer in the comments
it was quick and easy to understand
Glad to hear that!
Can you guys do a video on PWM vs TPO explaining the advantages, usage, differences, etc...
Hey!
Great topic suggestion! Thanks for sharing that with us. I have sent this over to our course developers.
Happy learning!
Thanks real pars . We having issues at work with our liquid carbon dioxide storage tanks , we can't pick exact co2 in the tank so would calibrating them work ?
Yes, liquid CO2 flashes and causes a lot of problems with measuring level with probes or differential pressure sensors. Load cells are the best choice to measure CO2 level in a tank, and a well-calibrated system is the first step towards providing an accurate measurement. I would have a proferssional scale company come do the calibration, especially if you using the weights for trade. The professional scale companies have the best test and diagnostic equipment available to tune-up your scale systems. It is well worth the cost!
This is the best TH-cam channel, congrats guys!
Thanks a lot! Happy learning
Great !
I understand that output signal from load cell is very weak. Please explain how this weak signal is processed and calibrated to the required accuracy?
❤
Thanks for sharing a very informative video.
You're very welcome, Navneet!
Pongan un subtítulo al video para entenderle no entiendo en inglés
Hola Edwin,
¡Gracias por tu comentario! Actualmente solo proporcionamos nuestros videos del curso en inglés, siempre puede activar los subtítulos en inglés, ya que eso podría facilitarle un poco la tarea.
Nuestras disculpas por cualquier inconveniente!
¡Feliz aprendizaje!
thank you for this video, you make the things look easy
You are very welcome, Azer!
Real pars thanking for ur video because of ur channel I m improved my automation knowledge
Now I want do courses in online
Hi Hari,
Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback!
Great to hear your enthusiasm about joining our online courses! You obtain full access to our complete course library (400+ video courses) by subscribing through the following link bit.ly/2IpeCp3
If you ever have any questions, feel free to reach out to us.
Happy learning!
@@realpars 77~~~41777'"8
I enjoy the video
Glad to hear that!
I used this particular clip to excel in my recent job interview
Great job!!
Thank you. I'm thinking about doing an independent project where it'll probably require me to understand how weight scales work and maybe even build one. This gave me a nice beginner's insight
That is amazing to hear, Safwan! Best of luck with your project!
I hear non-contact , radar based technology is the way to go. Also, look into radiometric weight scales on conveyor belts!
Nice vedio
Thank you!
Great 👍
Thank you!
Great explanation!
Glad you think so!