Related Manuals for Plusivo DMM
Summary of Contents for Plusivo DMM
- Page 1 Mastering The Art of Measurement Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 2: Table Of Contents
6.5 Choosing the Right Resistor for an LED 6.5.1 Example 6.6 Measuring Internal Resistance of a Battery 6.6.1 Example 6.7 Testing Some Components Using Multimeter 6.7.1 Potentiometer Test 6.7.2 BJT Transistor Test Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... -
Page 3: Introduction
Introduction In this guide, you are going to learn how to measure DC voltage and AC voltage, DC current, resistance, diodes, and continuity test using Digital MultiMeter (DMM). 1. Overview The compact digital multimeter can be used to measure DC voltage and AC voltage, DC current, resistance, diodes, continuity test, and other parameters. -
Page 4: Safety Notes
In general, if something unusual happens or if you suspect that something is wrong or has malfunctioned, do not do anything with the product and immediately contact the seller for assistance (email address: office@plusivo.com) 3. General Characteristics - Maximum display value: 1999 (31/2) bit, automatic polarity display - Sampling rate: about 3 times per second - Over range indication: the highest bit is "1"... -
Page 5: Dc Current
The diode forward voltage Reverse voltage: 3 V Buzzer sound Test Circuit starting voltage: Resistance smaller than (20 about 3 V ±1) Ω Overload Protection: 250 V DC or AC peak Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... -
Page 6: Reference Table
Mega (M) 1 million Kilo (k) 1 thousand No prefix 1 unit Milli (m) 1 thousandth −3 Micro (μ) 1 millionth −6 Nano (n) 1 billionth −9 Pico (p) 1 trillionth −12 Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... -
Page 7: Measurement
5. Measurement 5.1 DC Voltage Measurement 1. Insert the black wire to "COM" and the red wire to the "V/Ω" port; Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 8 3. Do not measure a voltage over 600 V, because there is a risk to damage the instrument circuit 4. When measuring a high voltage circuit, pay attention not to touch any high voltage part of the circuit. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 9: Ac Voltage Measurement
5.2 AC Voltage Measurement 1. Insert the black probe to "COM" and the red probe to "V/Ω"; Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 10 3. Do not measure a voltage over 600 Vrms, because there is a risk to damage the instrument circuit 4. When measuring a high voltage circuit, pay attention not to touch any high voltage part of the circuit. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 11: Dc Current Measurement
200 mA, or insert the red probe to "10 A" for a maximum 10 A measurement. For 200 mA or less, you can set-up the probes of the multimeter like this: Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 12 For 200 mA to 10 A, the red probe should be inserted to the 10 A DC port. Please see below. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 13 3. The maximum input current is 200 mA or 10 A (depending on the port that the red probe was inserted). If you try to measure a current higher than the maximum input specifications, the fuse will blow. Check the fuse if you have no reading on the display. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 14: Battery Test
5.4 Battery Test 1. Insert the black wire to "COM" and the red wire to the "V/Ω" port; Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 15 What the screen shows is the current flow in mA, the higher current you get, the stronger battery you have. Figure 7. The measured current in this figure is 21 mA. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 16: Resistance Measurement
2. Put the range switch to the corresponding resistor range and connect the two test probes to the element you want to measure. Figure 8. The measured resistance in this figure is 9.89 kΩ. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 17 5. Do not touch the two test probes at the same time, because the resistance of your body will be added in parallel to the resistance that you want to measure. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 18: Diode Test
1. Insert the black probe to "COM" and the red probe to "V/Ω" (note that the polarity of the red probe is "+"). 2. Put the range switch to " ". Connect the black probe to the cathode and the red probe to the anode. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 19 The display will show the approximate forward voltage drop. Figure 10. The measured forward voltage in this figure is 0.683 V. Figure 11. If you connect the probes incorrectly, the display will show "1". Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 20: Continuity Test
". Connect the probes to the circuit or the component you want to test the conductivity for it. If a conductor path is connected, the multimeter will beep, the display will show the resistance of the circuit or the component. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 21 Figure 12. If a conductor path is connected the multimeter will beep. If a conductor path is broken, the multimeter will not beep, the display will show "1". Figure 13. If a conductor path is broken the multimeter will not beep. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 22: Basic Concepts
R is the resistance. 6.1.1 Example Calculate the current in this circuit. �� �� = Simply, we can use Ohm’s law: �� 3 �� = 0. 00588 �� = 5. 88 ���� 510 Ω Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 23 Figure 14. The measured resistance in this figure is 508 Ω. Note: Disconnect the battery when measuring the resistance, otherwise, the multimeter may be damaged. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 24 Fig. 16. The measured current in this figure is 6 mA But indeed, we can count on our calculation “ ” because 5.88 3 �� / 510 Ω = 5. 88 ���� mA is almost equal to 6 mA. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 25: Joule's Law For Electrical Power
In our example, we have the voltage and the resistance, so we can use this formula: �� �� = �� (3 ��) = 0. 0176 �� = 17. 6 ���� 510 Ω Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 26 Figure 17. The measured resistance in this figure is 508 Ω. Note: Disconnect the battery when measuring the resistance, otherwise, the multimeter may be damaged. Figure 18. The measured voltage in this figure is 3.29 V DC. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 27 · �� (6 ����) · 510 Ω = 0. 0183 �� = 18. 3 ���� So all the formulas are almost equal to each other: 21.3 mW, 19.7 mW, 18.3 mW Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 28: Kirchhoff's Law
�� + �� = �� + �� ����1 ����2 ������1 ������2 6.3.2 Kirchhoff's Voltage Law The sum of all the voltages around the loop is equal to zero. �� �� �� Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... -
Page 29: Example
( + 2. 2 ��Ω · �� We get this equation from �� Equation 1: 3 �� − (�� · 2. 2 ��Ω) − (�� · 680 Ω) = 0 �� Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 30 · 14. 468) + 0. 0638 �� �� = (− 0. 003957 �� · 14. 468) + 0. 0638 �� �� = − 0. 05725 �� + 0. 0638 �� �� = 0. 00655 �� Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 31 �� = 0. 3 �� Now, let us make this circuit in reality and measure the voltage around the resistors using the multimeter. The measured voltage around the 2.2 k٠resistor is 6.23 V. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 32 Figure 22. The measured voltage in this figure is 0.33 V DC. So we can count on our calculation, we will always find these small differences between the calculations and the real measurements because of the tolerance of the components. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 33: Shunt Resistor
And then we will measure this voltage using the multimeter, this way we have converted the current into voltage. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... -
Page 34: Example
Using Ohm’s law “ “ �� = �� · �� 1. 88 �� = �� · 7. 5 Ω 1.88 �� �� = = 0. 251 �� = 251 ���� 7.5 Ω Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 35 1. 88 �� = �� · 8. 4 Ω 1.88 �� �� = = 0. 224 �� = 224 ���� 8.4 Ω So, we can count on this way to measure the current, 224 mA almost equal to 230 Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 36: Choosing The Right Resistor For An Led
After knowing the forward voltage for the LED, it is easy to calculate the resistance. To measure the forward voltage we connect a high value resistor, so we ensure that a low current will pass through the LED. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... -
Page 37: Example
Now, we need to build the circuit with a red LED, and we will use a high resistor, in our case, we will use a 2.2 kΩ resistor and measure the forward voltage using the multimeter. Figure 26. The measured voltage in this figure is 1.878 V DC Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 38 20 ���� And the closest standard value is 330 Ω. Now, let us build the circuit again using a 330 Ω resistor and measure the forward voltage again and the current. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 39 Figure 28. The measured voltage in this figure is 2.01 V DC. Figure 29. The measured current in this figure is 18.82 mA. 18.82 mA is so close to 20 mA. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 40: Measuring Internal Resistance Of A Battery
�� �� ���� ● Now, we have the current and the voltage on the internal resistance, so we can �� = �� calculate the value of the internal resistor: �� ���� Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... -
Page 41: Example
● Now, we have the current and the voltage on the internal resistance, so we can �� = �� calculate the value of the internal resistor: �� ���� 0.46 �� = 27. 54 Ω 0.0167 �� Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... -
Page 42: Testing Some Components Using Multimeter
In this section, we are going to test some components using a multimeter. 6.7.1 Potentiometer Test First, we need to measure the resistance between A - C. Figure 32. The measured resistance in this figure is 48.8 kΩ. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 43 Figure 33. The measured resistance in this figure is 14.6 kΩ. Figure 34. The measured resistance in this figure is 34.7 kΩ. , which is almost equal to 48.8 kΩ 14. 6 ��Ω + 34. 7 ��Ω = 49. 3 ��Ω Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
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Page 44: Bjt Transistor Test
Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com... - Page 45 Figure 36. The measured forward voltage in this figure is 0.669 V. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 46 Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 47 Figure 38. The measured forward voltage in this figure is 0.672 V. Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 48 PLUSIVO KITS MULTIMETER KITS Digital Multimeter Kit AC Current Clamp Meter AC/DC Clamp Meter KITS FOR LEARNING ELECTRONICS Wireless Super Starter Kit with ESP8266 Nano Super Starter Kit (Programmable With Arduino IDE) Pi 4 Super Starter Kit Microcontroller Super Starter Kit Mastering the Art of Measurement (Digital Multimeter) r.01...
- Page 49 20 meters each color Solid PVC Coated Wires Gauge Length 18 AWG 5 meters each color 20 AWG 7 meters each color 22 AWG 10 meters each color 24 AWG 11 meters each color Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 50 LED KITS 3mm and 5mm LED Kit (310 pcs) 5 mm Diffused LED Kits (600 pcs) 3 mm Diffused LED Kits (1000 pcs) 3 mm Clear Lens LED Kits (1000 pcs) Mastering the Art of Measurement (Digital Multimeter) r.01 www.plusivo.com...
- Page 51 OTHER PLUSIVO KITS Resistor Kit Transistor Kit Dupont Connector Kit Potentiometer Kit Pi 4 Power Adapter Kit Solder Wire and Paste Kit To know more about us and our products, please visit us in our official pages: www.plusivo.com https://www.facebook.com/plusivo/ For inquiries and assistance, please reach us via email address: office@plusivo.com...
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