Скачать или смотреть Measuring Voltage with Ammeter: The Art of Adding a Multiplier Resistor (019e)

You have an analog ammeter in your hand and you want to be able to measure voltage with it.

In this video you will learn how to create a home grown, voltmeter from that ammeter by adding a multiplier resistor.

I will step you through the process from the beginning to end using my own 100 microamp meter as the guinea pig. I will create a 10 Volt full-scale meter out of it.

My end product agrees with my DVM dead on!

Here is the link to the formula sheet:
https://drive.google.com/file/d/17pXo...

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Time Marker Notes
00:05 Introductions
00:45 Reading an Analog Meter Accurately
00:57 Selecting Your Ammeter
02:37 Calculate Ohms/Volt for Your Selected Meter
03:16 Characterize Your Meter
03:35 Introduction to the Meter Used in My Demonstration
04:49 Calculations: Full-Scale Voltage of the Ammeter
05:26 Goal: Voltage Divider with Ammeter as the Output
06:41 CALCULATE: Multiplier Resistor - Foundations
07:57 CALCULATE: Multiplier Resistor - Final Equation
08:49 CALCULATE: Multiplier Resistor Power Dissipation
09:21 SPECIFICATION: Resistor Working Voltage
10:02 SOLUTION TOPOLOGY
10:18 Fixed Resistors ... Series & Parallel
11:03 Use a Potentiometer
12:01 Potentiometer + Fixed Resistor
12:28 CALCULATION: Fixed Resistor & Potentiometer
15:04 SELECTION: Actual Part Selection of Off the Shelf Parts
17:00 SELECTION: HOME GROWN SOLUTION
17:33 ASSEMBLY: Preparation
18:12 INITIAL ADJUSTMENT
18:56 CONNECTION & TEST
19:10 ZERO Your Meter First
19:15 TESTING: What we need
19:40 TESTING: Preparation
20:02 TESTING: Connections
20:57 TESTING: The Actual Process, Ammeter to Full-Scale
22:00 ADJUSTMENT: DVM to Target, Adjust for Meter Full-Scale
23:02 Comments about accuracy
23:30 Final Comments and toodle-oots
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