{"id":1339,"date":"2020-04-08T14:22:53","date_gmt":"2020-04-08T07:22:53","guid":{"rendered":"http:\/\/wiki.rdd-tech.com\/?post_type=ht_kb&p=1339"},"modified":"2020-08-13T13:16:23","modified_gmt":"2020-08-13T06:16:23","slug":"gravity-analog-current-to-voltage-converterfor-420ma-application","status":"publish","type":"ht_kb","link":"https:\/\/wiki.rdd-tech.com\/index.php\/knowledge-base\/gravity-analog-current-to-voltage-converterfor-420ma-application\/","title":{"rendered":"Gravity: Analog Current to Voltage Converter(for 4~20mA Application)"},"content":{"rendered":"\n
Pendahuluan<\/h2>\n\n\n\n
Gravity: Analog Current to Voltage Converter merupakan sebuah kit\/Modul sensor dari dfrobot, yang berfungsi untuk mengubah besar arus menjadi besaran tegangan. Kit ini dapat menkonversi arus 0-25 mA ke tegangan 0-3V. Sensor kualitas industri atau sensor-sensor lainnya menggunakan sinyal arus 4-20mA. dengan modul ini kita dapat dengan mudah mendeteksi nilai arus tersebut. <\/p>\n\n\n\n
Normalnya, sinyal arus kurang dari 4 mA dapat dikatakan “fault diagnosis”, dan sinyal arus lebih dari 20 mA dapat dikatakan “overrun detection”. Karena Modul ini dapat mendeteksi sinyal arus 0-25 mA, maka “fault diagnosis” dan “overrun detection” dapat dengan mudah di deteksi. <\/p>\n\n\n\n
Modul ini menggunakan munggunakan resitor berpesisi 0.1% dan op-amp drift rail-to-rail rendah noise, akurasi tinggi dan tidak perlu kalibrasi, sehingga nyaman digunakan. Catu daya tegangan modul sensor 3.3V – 5.5V, output tegangan 0 – 3V yang sangat kompatibel dengan banyak papan kontrol.<\/p>\n\n\n\n
Catatan: Untuk Akurasi yang lebih tinggi gunakan ADC yang beresolusi 12 bit<\/strong><\/p>\n\n\n\n
Tutorial ini akan mendemo kan bagaimana mendeteksi sinyal arus 4 – 20 mA dengan modul ini dan juga arduino. Arus masuka modul linier dengan tegangan keluaran modul, seperti gambar di bawah ini.<\/p>\n\n\n\nSumber:fdrobot.com<\/figcaption><\/figure>\n\n\n\n
Alat yang Dibutuhkan<\/h3>\n\n\n\n
Arduino Board x1<\/li>
Modul Analog Current To Voltage Converter x1<\/li>
Sensor (Keluaran Output Sensor 4 – 20 mA) atau Sumber Arus x1<\/li>
Kabel x3<\/li>
Arduino IDE Software<\/li><\/ul>\n\n\n\n
Diagram Koneksi<\/h3>\n\n\n\n<\/figure>\n\n\n\n
Sample Code<\/h3>\n\n\n\n
Sebelum meng-upload program kedalam arduino, direkomendasikan untuk mengecek terlebih dahulu referensi Tegangan (VRef) ADC pada Arduino Board, dan cantumkan tegangan referensi yang telah di cek kedalam variable “VREF” (dalam satuan mV) untuk mengingkatkan akurasi pengukuran.<\/p>\n\n\n\n
\/***********************************************************\n DFRobot Gravity: Analog Current to Voltage Converter(For 4~20mA Application)\n SKU:SEN0262\n\n GNU Lesser General Public License.\n See <http:\/\/www.gnu.org\/licenses\/> for details.\n All above must be included in any redistribution\n ****************************************************\/\n\n#define CurrentSensorPin A1\n#define VREF 5000 \/\/ ADC's reference voltage on your Arduino,typical value:5000mV\n\nunsigned int voltage; \/\/unit:mV\nfloat current; \/\/unit:mA\n\nvoid setup()\n{\n Serial.begin(115200);\n}\n\nvoid loop()\n{\n voltage = analogRead(CurrentSensorPin)\/1024.0*VREF;\n Serial.print(\"voltage:\");\n Serial.print(voltage);\n Serial.print(\"mV \");\n current = voltage\/120.0; \/\/Sense Resistor:120ohm\n Serial.print(\"current:\");\n Serial.print(current);\n Serial.println(\"mA\");\n delay(1000);\n}<\/code><\/pre>\n\n\n\n
![\"\"](\"http:\/\/wiki.rdd-tech.com\/wp-content\/uploads\/2020\/04\/SEN0262_Overview-1024x644.png\")
![\"\"](\"http:\/\/wiki.rdd-tech.com\/wp-content\/uploads\/2020\/04\/SEN0262_CurrentVoltageEN-1024x940.png\")
![\"\"](\"http:\/\/wiki.rdd-tech.com\/wp-content\/uploads\/2020\/04\/SEN0262_Arduino_connectionEN.png\")
<\/figure>\n\n\n\n![\"\"](\"http:\/\/wiki.rdd-tech.com\/wp-content\/uploads\/2020\/04\/image-8.png\")
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