Digital Multimeter part 1

Digital Multimeter part 1

• 1.
  Pradeep Patil –Flipped Classroom (L1) under Open Education Resources Creation DOMAIN : Second Year TOPIC : Electronic Instrument – Digital Multimeter (DMM) COURSE : Electronic Instruments and Measurement AFFILIATION : Walchand College of Engineering , Sangli 1 TARGET AUDIENCE : Second Year Electronics Engg students Out-of-class_ppt for video - v2
• 2.
  Out-of-class Activity Design– L1 At the end of watching the videos student should be able to, 1. List or write need and advantages of electronic & digital instruments (Recall / Understand Level) 2. Think of blocks required for DMM . 3. Write specifications of digital instruments (Apply Level) 1. Electronic instrument / measurement 2. Analog instruments 3. Digital Instruments Learning Objective(s) of Out-of-Class Activity: 2 Key Concept(s) to be covered: Out-of-class_ppt for video - v2
• 3.
  Out-of-class_ppt for video- v2 3 Advantages of Digital Instruments: 1. The digital instruments indicate the reading directly in decimal numbers. So, no observational error. 2. More accuracy. 3. Resolution is more. i.e one tenths or one hundredth of volt can be measured. 4. Repeated measurement – i.e. 7 to 10 times measurement is carried out in 1 minute. 5. The digital instrument requires smaller power. 6. Its output is in digital form , so it is directly fed into the memory .
• 4.
  Digital Multimeter (DMM)– Functions  Can measure – 1) DC voltage , 2) AC voltage 3) Current , 4) Resistance 4Out-of-class_ppt for video - v2
• 5.
  Block diagram ofDigital Measurement System 5Out-of-class_ppt for video - v2
• 6.
  • In digitalinstrument (DMM) , analog to digital (ADC) is required & parameter is displayed in terms of digits on digital display. • Input requirement for ADC is dc voltage. Basic block – ADC ( DC DVM) 6Out-of-class_ppt for video - v2
• 7.
   Additional blocks–  To measure AC voltage - ?  To measure current - ?  To measure resistance - ? Basic block – ADC ( DC DVM) 7Out-of-class_ppt for video - v2
• 8.
  • For 3and ½ digit display , count will be from 0000 to 1999. • So , resolution will be -- n = 3 R = 1/ 10 3 = 0.001 Volts 8Out-of-class_ppt for video - v2