__NUXT_JSONP__("/en/articles", (function(a,b,c,d,e,f,g,h,i,j,k){return {data:[{articlesDataSource:[{id:637,slug:"the-difference-between-4-and-6-wire-load-cells",title:"The Difference Between 4 and 6 Wire Load Cells",content:"\u003Cp\u003EDepending on the model, the load cells have 4 or 6 wires with a wire shield. 6 wire types in addition to power +, power -, signal + and signal – terminals (Ext+, Ext-, Sig+, Sig-) have two other wires, sense + and sense – (Sen+, Sen-) or reference+ and reference- are.\u003C\u002Fp\u003E\n\u003Cp\u003EThe resistance of electric wires depends on factors such as temperature and length. Considering this, it can be said that changes in temperature and length can cause changes in the voltage drop on the wire, which the 6-wire system allows to compensate for these changes.\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-638 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F08\u002F4-6-wire.jpg\" alt=\"\" width=\"550\" height=\"216\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp\u003E4-wire load cells are sensitive to thermal variations and are calibrated with standard cable lengths. For this reason, it is recommended not to shorten the cable length of 4-wire load cells; In the case of weighing systems, displays and transmitters with 6-wire input and junction box, it is recommended to use 6-wire load cells to compensate for the voltage drop on the cable between the display and the junction box.\u003Cbr \u002F\u003E\nIf you are using a weight display or a weight transmitter with 4-wire capability, it is recommended to use a shielded cable with a suitable cross-section (at least 1 mm), so that the voltage drop will be as low as possible.\u003Cbr \u002F\u003E\nIn case of using 6-wire load cell, there is no need to observe these things.\u003Cbr \u002F\u003E\nThe sense or reference wires are connected to the sense terminals (Sen+ and Sen-) of the display and by measuring the actual voltage that reaches the load cell, it increases the accuracy of weight calculations.\u003Cbr \u002F\u003E\nFor this reason, using 6-wire load cells is preferable to 4-wire. Also, by increasing or decreasing the length of the wire, the accuracy of the load cell does not change.\u003C\u002Fp\u003E\n",image:"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F08\u002Fwire_pairs-1.jpg",canonicalAdress:a,summary:"\u003Cp\u003EDepending on the model, the load cells have 4 or 6 wires with a wire shield. 6 wire types in addition to power +, power -, signal + and signal – terminals (Ext+, Ext-, Sig+, Sig-) have two other wires, sense + and sense – (Sen+, Sen-) or reference+ and reference- are.\u003Cbr \u002F\u003E\nThe resistance of electric wires depends on factors such as temperature and length. Considering this, it can be said that changes in temperature and length can cause changes in the voltage drop on the wire, which the 6-wire system allows to compensate for these changes.\u003C\u002Fp\u003E\n",seoDescription:"Load cell, 6-wire load cell, 4-wire load cell, comparison of load cells",link:"\u002Farticles\u002Fpost\u002Fthe-difference-between-4-and-6-wire-load-cells",publishDate:"2021-08-06T12:25:23",seoJsonLd:b},{id:624,slug:"what-is-adc",title:"What is ADC",content:"\u003Cp\u003EAn analog-to-digital converter (ADC, A\u002FD, or A-to-D) is a system that converts an analog signal, such as sound entering a microphone or light entering a digital camera, into a digital signal.\u003C\u002Fp\u003E\n\u003Cp\u003EAlso, ADC provides the possibility of measuring analog voltage or current input to an electronic device in isolation. This device can be a voltage or current indicator. Normally, the ADC output is a binary number corresponding to the input. Of course, ADCs also provide other possibilities. such as differential measurement, input signal amplification and…\u003C\u002Fp\u003E\n\u003Cp\u003EToday, ADCs are produced as IC integrated circuits along with analog circuits (amplifier, comparator, limiter, etc.) and digital circuits (shift register and communication circuits, etc.).\u003C\u002Fp\u003E\n\u003Cp\u003EAn ADC converts a continuous-time, continuous-amplitude analog signal into a discrete-time, discrete-amplitude digital signal. ADC is not capable of continuous conversion, so ADC samples the input signal and after converting the sample to a digital value, moves to the next sampling.\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-626\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F07\u002FADC-Convertion2-300x132.jpg\" alt=\"\" width=\"300\" height=\"132\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F07\u002FADC-Convertion2-300x132.jpg 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F07\u002FADC-Convertion2.jpg 750w\" sizes=\"(max-width: 300px) 100vw, 300px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp\u003EADC performance is primarily determined by bandwidth (sampling rate) and signal-to-noise ratio (SNR). An ADC is affected by many factors, including resolution, linearity, and accuracy (how closely the digital value matches the actual analog signal), etc. The SNR of an ADC is often summarized in terms of its effective number of bits (ENOB), the number of bits from each conversion that is noise-free is called the effective number of bits. An ideal ADC has an ENOB equal to its resolution. ADCs are selected according to the conversion speed and SNR, or in other words, the accuracy required in the conversion.\u003C\u002Fp\u003E\n\u003Cp\u003EA higher conversion rate means more samples are taken over time. The higher the sampling speed, the more information received from the signal, and more accuracy helps to have more accurate information from the sample.\u003C\u002Fp\u003E\n",image:"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F07\u002FADC-Convertion.jpg",canonicalAdress:a,summary:"\u003Cp\u003EAn analog-to-digital converter (ADC, A\u002FD, or A-to-D) is a system that converts an analog signal, such as sound entering a microphone or light entering a digital camera, into a digital signal.\u003C\u002Fp\u003E\n\u003Cp\u003EAn ADC converts a continuous-time, continuous-amplitude analog signal into a discrete-time, discrete-amplitude digital signal. ADC is not capable of continuous conversion, so ADC samples the input signal and after converting the sample to a digital value, moves to the next sampling.\u003C\u002Fp\u003E\n",seoDescription:"Analog to Digital convertor ، ADC، A\u002FD, Analog to Digital Converter",link:"\u002Farticles\u002Fpost\u002Fwhat-is-adc",publishDate:"2021-07-23T13:32:46",seoJsonLd:b},{id:499,slug:"what-is-wheatstone-bridge",title:"What is Wheatstone Bridge?",content:"\u003Cp\u003EThe Wheatstone bridge was invented by Samuel Hunter Christie in 1833 and improved and popularized by Sir Charles Watson in 1843. One of the early applications of Paul Whetstone was for soil analysis and comparison.\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-501 aligncenter\" src=\"https:\u002F\u002Fpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002Fwetson-bridge-300x231.jpg\" alt=\"\" width=\"300\" height=\"231\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002Fwetson-bridge-300x231.jpg 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002Fwetson-bridge.jpg 344w\" sizes=\"(max-width: 300px) 100vw, 300px\" \u002F\u003EWheatstone bridge demonstrates the concept of difference measurement, which can be very accurate. Variations on the Wheatstone bridge can be used to measure capacitance, inductance, impedance, and other quantities such as the amount of combustible gases in a sample with an Explosometer. The Kelvin bridge is specially adapted from the Wheatstone bridge for measuring very low resistances. In many cases, the importance of measuring the unknown resistance is related to the measurement of the effect of some physical phenomena (such as force, temperature, pressure, etc.), thus it is possible to use Paul Watson in the indirect measurement of those elements.\u003Cbr \u002F\u003E\nThis property is used in the load cell to measure the amount of force.\u003C\u002Fp\u003E\n",image:"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002Fwetson-bridge0.jpg",canonicalAdress:a,summary:"\u003Cp\u003EWheatstone bridge is a special arrangement of four electrical resistances that is used to determine the unknown resistance.\u003Cbr \u002F\u003E\nThe Wheatstone bridge was invented by Samuel Hunter Christie in 1833 and improved and popularized by Sir Charles Watson in 1843. One of the early applications of Paul Whetstone was for soil analysis and comparison.\u003C\u002Fp\u003E\n",seoDescription:"Wheatstone Bridge\r\nStrain Gauge\r\nApplication of Wheatstone Bridge\r\nApplication of Strain Gauge",link:"\u002Farticles\u002Fpost\u002Fwhat-is-wheatstone-bridge",publishDate:"2021-06-11T11:07:02",seoJsonLd:b},{id:494,slug:"what-is-a-strain-gauge",title:"What is a strain gauge?",content:"\u003Cp\u003EA strain gauge is a piece used to measure bending. This piece was invented in 1938 by Edward E. Simmons and Arthur C. Ruge.\u003C\u002Fp\u003E\n\u003Cp\u003EThe strain gauge is usually a piece of thin foil, and it is attached to the metal piece using special adhesives. As the shape of the foil piece changes, its shape changes and its electrical resistance changes. The change in electrical resistance is usually measured using a Wheatstone bridge.\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"wp-image-495 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002FStrain-Gage1-282x300.jpg\" alt=\"\" width=\"183\" height=\"194\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002FStrain-Gage1-282x300.jpg 282w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002FStrain-Gage1.jpg 470w\" sizes=\"(max-width: 183px) 100vw, 183px\" \u002F\u003E \u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-496 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002FStrain-Gage2-300x195.jpg\" alt=\"\" width=\"300\" height=\"195\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002FStrain-Gage2-300x195.jpg 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002FStrain-Gage2.jpg 594w\" sizes=\"(max-width: 300px) 100vw, 300px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp\u003EIn practice, to measure the resistance of the strain gauge, a voltage between 5 and 12 volts is usually applied to the Wheatstone bridge and the output voltage of the bridge is measured. The output voltage is about a few millivolts.\u003C\u002Fp\u003E\n\u003Cp\u003EStrain gauge sensors are used in many cases, but the most common application is to measure pressure or bending.\u003C\u002Fp\u003E\n",image:"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002FStrain-Gage0.jpg",canonicalAdress:a,summary:"\u003Cp\u003EA strain gauge is a piece used to measure bending. This piece was invented in 1938 by Edward E. Simmons and Arthur C. Ruge.\u003C\u002Fp\u003E\n",seoDescription:"strain gauge\r\nLoad cell sensor",link:"\u002Farticles\u002Fpost\u002Fwhat-is-a-strain-gauge",publishDate:"2021-06-11T10:49:23",seoJsonLd:b},{id:c,slug:d,title:e,content:f,image:g,canonicalAdress:a,summary:h,seoDescription:i,link:j,publishDate:k,seoJsonLd:b},{id:337,slug:"increasing-the-accuracy-of-load-cell-measurement-using-earth",title:"Increasing the Accuracy of Load Cell Measurement Using Earth",content:"\u003Cp style=\"text-align: left;\"\u003EThe accuracy of the signal to be measured has always been one of the basic challenges of electrical and electronic engineers. In this article, we are going to discuss the effect that earth has on the accuracy of the reading of the signal to be measured.\u003Cbr \u002F\u003E\nFor this purpose, we have chosen a widely used signal, that is, the signal received from the load cell transducer, and the transmitter under test is the PM-LT01 transmitter.\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EAs we know, the signal produced by the load cell is a signal with a very low voltage level, for example, consider a load cell with a characteristic of 2 mv\u002FV by applying a voltage of 5 volts as an excitation voltage to this load cell. In the case that the maximum load is placed on this load cell, we have a value of 10 millivolts at the output of the load cell:\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: center;\"\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-340 size-medium\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FLoadCel-Shematic-e1626443905879-300x296.png\" alt=\"\" width=\"300\" height=\"296\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FLoadCel-Shematic-e1626443905879-300x296.png 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FLoadCel-Shematic-e1626443905879.png 513w\" sizes=\"(max-width: 300px) 100vw, 300px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003ENow, if this load cell is 100 kg, how many volts will we have at the output per gram?\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EFirst, we convert 100 kg to gram unit:\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-338 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FFormula1-300x37.jpg\" alt=\"\" width=\"300\" height=\"37\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FFormula1-300x37.jpg 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FFormula1.jpg 693w\" sizes=\"(max-width: 300px) 100vw, 300px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp style=\"font-weight: 400; text-align: left;\"\u003ENow we know that we have 10 millivolts per 100,000 grams, so there is 0.1 microvolts per gram at the output of the load cell.\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-339 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FFormula2-300x87.jpg\" alt=\"\" width=\"300\" height=\"87\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FFormula2-300x87.jpg 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FFormula2.jpg 537w\" sizes=\"(max-width: 300px) 100vw, 300px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp\u003EWe see what a very low voltage level we are dealing with and it is not difficult to imagine a noise with the same voltage level.\u003C\u002Fp\u003E\n\u003Cp\u003EThere are many ways to deal with noise, but the most important principle is the proper use of earth.\u003C\u002Fp\u003E\n\u003Cp\u003EThe issues related to the quality of an earth system are beyond the scope of this article. We only need to mention that the wire that is connected to the ground must have a low resistance so that it can easily transmit the disturbing signal to the ground.\u003C\u002Fp\u003E\n\u003Cp\u003EBut regarding the load cell, having a cable without a shield means leaving the door open for intruders to enter, so be sure to use a cable with a strong and suitable shield.\u003C\u002Fp\u003E\n\u003Cp\u003EAnd when connecting the cable to the transmitter, pay attention to the shortest possible length without the wire shield.\u003C\u002Fp\u003E\n\u003Cp\u003ENow let’s do some simple experiments regarding the effect of noise and check the results.\u003C\u002Fp\u003E\n\u003Cp\u003EFirst, test with the following conditions:\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cstrong\u003ELoad cell 50 kg\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cstrong\u003E120 Hz sampling frequency\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cstrong\u003EWe set the number of samples for averaging to 1 to eliminate the effect of averaging.\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\n\u003Cp\u003ENote that during the test, the weight placed on the load cell is completely constant.\u003C\u002Fp\u003E\n\u003Cp\u003EFor this, you can easily use the program designed by Pars Mega.\u003C\u002Fp\u003E\n\u003Cp\u003EWhen the program opens, go to the filter setting section and make the relevant settings.\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-345 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FPMLT01-Software-Setting01.png\" alt=\"\" width=\"265\" height=\"299\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EWe will perform the first test without earth connection. For a better display, choose a few minutes for this time\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EWe call this time T1.\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-342 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise02-300x210.png\" alt=\"\" width=\"300\" height=\"210\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise02-300x210.png 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise02.png 516w\" sizes=\"(max-width: 300px) 100vw, 300px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EAs you can see in the above figure, the highest weight read is close to 1385 grams and the lowest is 1330 grams, we see that we have a range of 55 grams as a game (Threshold).\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EIn the second test, we add earth to our system, and we call this period T2.\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003E\u003Cspan style=\"color: #993366;\"\u003E\u003Cstrong\u003Enotice\u003C\u002Fstrong\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EBe sure to connect the load cell shield cable wire and earth wire to the terminal placed on the transmitter, in other words, the transmitter itself needs earth to improve performance.\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-341 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise01-300x210.jpg\" alt=\"\" width=\"300\" height=\"210\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise01-300x210.jpg 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise01.jpg 516w\" sizes=\"(max-width: 300px) 100vw, 300px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EThe figure says it all. The 55 gram range has become a 3.5 gram range. An unimaginable result that shows the importance of the earth system.\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003ESee what a great achievement we achieved by simply connecting an earth wire.\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EWe have read a 50 kg load cell with a high sampling frequency of 120 Hz (that is, 120 new samples per second) with an accuracy close to 3.5 grams. That is, we have reached a resolution of 14285.\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003ELet us repeat this experiment with another sampling frequency.\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EWe select the highest and lowest sampling frequency.\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003E\u003Cstrong\u003EFirst, the highest frequency of the PMLT01 transmitter is 4800 Hz\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-343 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise03-300x210.jpg\" alt=\"\" width=\"300\" height=\"210\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise03-300x210.jpg 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise03.jpg 516w\" sizes=\"(max-width: 300px) 100vw, 300px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp style=\"font-weight: 400; text-align: left;\"\u003EAs you can see, the weight difference when the earth is not connected is 195 grams and after the earth is connected, it has reached 16 grams, which is a great accuracy considering the sampling frequency.\u003C\u002Fp\u003E\n\u003Cp style=\"font-weight: 400; text-align: left;\"\u003EIn another test, we choose the lowest frequency of the transmitter, i.e. 4.7 Hz, this is the frequency at which the highest possible accuracy of the transmitter, i.e. 1:100,000, can be reached.\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-344 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise04-300x210.png\" alt=\"\" width=\"300\" height=\"210\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise04-300x210.png 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise04.png 516w\" sizes=\"(max-width: 300px) 100vw, 300px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EThe above figure shows the test with a frequency of 4.7 Hz.\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EConsidering that the selected frequency is very low, the digital filter inside the transmitter can perform well and there is not much difference between these two modes (with earth and without earth connection).\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003EIt should be noted that this test was performed in laboratory conditions and the test results may differ greatly in different conditions and according to different parameters.\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: left;\"\u003ENote that the amount of weight change in the last test is 0.4 grams, which is higher than the accuracy of 1:100,000.\u003C\u002Fp\u003E\n",image:"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F04\u002FNoise03.jpg",canonicalAdress:a,summary:"\u003Cp style=\"text-align: left;\"\u003EThe accuracy of the signal to be measured has always been one of the basic challenges of electrical and electronic engineers. In this article, we are going to discuss the effect that earth has on the accuracy of the reading of the signal to be measured.\u003Cbr \u002F\u003E\nFor this purpose, we have chosen a widely used signal, that is, the signal received from the load cell transducer, and the transmitter under test is the PM-LT01 transmitter.\u003C\u002Fp\u003E\n",seoDescription:"Increasing the accuracy of load cell measurement with the help of earth",link:"\u002Farticles\u002Fpost\u002Fincreasing-the-accuracy-of-load-cell-measurement-using-earth",publishDate:"2021-04-29T19:06:13",seoJsonLd:b}],itemPerPage:15,pageId:1,sliderArticle:{id:c,slug:d,title:e,content:f,image:g,canonicalAdress:a,summary:h,seoDescription:i,link:j,publishDate:k,seoJsonLd:b}}],fetch:{},mutations:[]}}("",null,489,"load-cell-test-methods","Load Cell Test Methods","\u003Cp\u003EIt has happened in many cases that you have encountered this case during or after setting up the load cell that it seems that the load cell does not behave as you expected or does not show any response to force changes.\u003C\u002Fp\u003E\n\u003Cp\u003EThe question that will arise for an engineer is how should I ensure the health of the load cell used?\u003C\u002Fp\u003E\n\u003Cp\u003EAccording to the knowledge and experience gained in this field, Pars Mega offers some simple solutions for load cell troubleshooting and at the end offers you a simple and very accurate proposal.\u003C\u002Fp\u003E\n\u003Cp\u003E1- Checking the appearance of the load cell\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-532 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F2.jpg\" alt=\"\" width=\"265\" height=\"152\" \u002F\u003EThe first step in the load cell test is to check the appearance of the load cell, in other words, the load cell must not be bent or deformed. Note that the basis of the work of the load cell is based on this bending, but the load cell must be in its normal state without any force on it, and another point is that even when under load, the force must be applied in a direction that the factory The manufacturer of the load cell has mentioned it.\u003C\u002Fp\u003E\n\u003Cp\u003E2-Appearance test of the cable\u003C\u002Fp\u003E\n\u003Cp\u003EIn many cases, it can be seen that the cable of the load cell has been interrupted or crushed, or has been chewed by vermin, which is possible to find this problem by visual inspection. The recommendation of ParsMega company experts is to use strong and resistant pipes to keep the cable safe.\u003C\u002Fp\u003E\n\u003Cp\u003E3-load cell ohms test\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-533 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F3.jpg\" alt=\"\" width=\"284\" height=\"129\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp\u003EAt the time of buying a load cell, you will be given a load cell specification sheet, which will help you when troubleshooting the load cell, one of the things that is mentioned in this sheet is a parameter called Terminal resistance, input and Terminal resistance, output, which are respectively The resistance of the load cell is in the excitation part and the output part.\u003C\u002Fp\u003E\n\u003Cp\u003EAn example of this sheet is shown in the following table:\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-534 size-full\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F4.jpg\" alt=\"\" width=\"1085\" height=\"138\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F4.jpg 1085w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F4-300x38.jpg 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F4-1024x130.jpg 1024w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F4-768x98.jpg 768w\" sizes=\"(max-width: 1085px) 100vw, 1085px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp\u003EImagine that we want to test this same load cell in terms of ohms. First, we disconnect the load cell wires from the load cell transmitter. Or the signal we do should be 350 ohms.\u003C\u002Fp\u003E\n\u003Cp\u003E4- Humidity testing\u003C\u002Fp\u003E\n\u003Cp\u003EIn the situation where the load cell is kept in an environment with high humidity, there is a possibility of moisture loss. To be sure of this, you need an ohmmeter capable of measuring ohms up to the range of 2000 megaohms.\u003C\u002Fp\u003E\n\u003Cp\u003ETo perform this test, first separate the wires of the load cell from the transmitter or display and connect them to each other. Connect one end of the ohmmeter to the wires of the load cell and the other end of the ohmmeter to the body of the load cell. Pay attention that your body should not touch the end of the ohmmeter. be connected If the ohmmeter shows a value less than 2000 megaohms, moisture has penetrated into your load cell or cable.\u003C\u002Fp\u003E\n\u003Cp\u003E5- Measuring the load cell output voltage\u003C\u002Fp\u003E\n\u003Cp\u003EThis is a very reliable and accurate way to diagnose load cell problems.\u003C\u002Fp\u003E\n\u003Cp\u003EIn ParsMega transmitters, there is a parameter that is mentioned in the manual called input voltage, its unit is millivolts.\u003C\u002Fp\u003E\n\u003Cp\u003EHere, it is necessary to give a brief explanation about this voltage. In the load cell information sheet, there is a parameter called output sensitivity, whose unit is mv\u002FV.\u003C\u002Fp\u003E\n\u003Cp\u003EAn example is given below:\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-535 size-full\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F5.jpg\" alt=\"\" width=\"1089\" height=\"93\" srcset=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F5.jpg 1089w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F5-300x26.jpg 300w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F5-1024x87.jpg 1024w, https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F5-768x66.jpg 768w\" sizes=\"(max-width: 1089px) 100vw, 1089px\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp style=\"font-weight: 400;\"\u003EThis parameter indicates how much voltage the load cell puts in the output for every volt that is given to it in the excitation section in the state where the maximum load is placed on it.\u003C\u002Fp\u003E\n\u003Cp style=\"font-weight: 400;\"\u003EFor example, the load cell that is at the top of its information sheet, in the state where the full load is on it, for each volt in Excitation, the value of mv\u002Fv2 appears in the output, assuming that the excitation voltage is 5 volts, this load cell is in the state where all A load is placed on it, it puts a value of 10 mV at the output.\u003C\u002Fp\u003E\n\u003Cp style=\"font-weight: 400;\"\u003EIn this way, you can get what voltage should be in the output for each kilogram of load with a simple proportional table.\u003C\u002Fp\u003E\n\u003Cp style=\"font-weight: 400;\"\u003EPlease note that this parameter is displayed in the program that ParsMega Company provides to its respected users.\u003C\u002Fp\u003E\n\u003Cp\u003E\u003Cimg decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-538 aligncenter\" src=\"https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002F6.jpg\" alt=\"\" width=\"169\" height=\"191\" \u002F\u003E\u003C\u002Fp\u003E\n\u003Cp\u003EEngineers are advised to include this parameter in the HMI program of their device so that troubleshooting can be done faster using this parameter when the device is set up remotely.\u003C\u002Fp\u003E\n\u003Cp style=\"text-align: center;\"\u003EIf you need any advice or more information, please \u003Ca href=\"https:\u002F\u002Fparsmega.com\u002Fen\u002Fcontact-us\"\u003Econtact ParsMega Company\u003C\u002Fa\u003E.\u003C\u002Fp\u003E\n","https:\u002F\u002Fenpanel.parsmega.com\u002Fwp-content\u002Fuploads\u002F2021\u002F06\u002FLoadcell-test.jpg","\u003Cp\u003EIt has happened in many cases that you have encountered this case during or after setting up the load cell that it seems that the load cell does not behave as you expected or does not show any response to force changes.\u003C\u002Fp\u003E\n\u003Cp\u003EThe question that will arise for an engineer is how should I ensure the health of the load cell used?\u003C\u002Fp\u003E\n\u003Cp\u003EAccording to the knowledge and experience gained in this field, Pars Mega offers some simple solutions for load cell troubleshooting and at the end offers you a simple and very accurate proposal.\u003C\u002Fp\u003E\n","Load cell test\r\nLoad cell troubleshooting\r\nLoad cell excitation voltage","\u002Farticles\u002Fpost\u002Fload-cell-test-methods","2021-06-11T07:05:00")));