To use a ZOYI multimeter to test voltage, you'll need to follow these steps. However, please be aware that the exact process may vary slightly depending on the specific model of ZOYI multimeter you're using. Here is a general guide:

1. Understand the difference between Auto-range and Manual range multimeters: An auto-ranging multimeter automatically selects the appropriate range for the measurement you're making. A manual range multimeter requires you to select the range yourself.

   The benefit of auto-ranging is that it simplifies use and reduces the chance of errors. Manual range meters can be a bit more complex to use, but they're often faster because you're not waiting for the meter to select the range.

2. Identify the type of your multimeter: Check your multimeter whether it's an auto-range or manual range. The identification usually will be stated in your multimeter's manual or marked somewhere on the multimeter.

3. Select the correct function: Turn the dial to V~ for AC voltage or V- for DC voltage, depending on what you are measuring.

   If you're using a manual range multimeter, you'll need to select the range that is higher than what you expect the voltage to be. If you're not sure, start with the highest range and work your way down.

4. Insert the probes into the correct terminals: Usually, the red probe goes into the terminal marked V (for voltage), Ω (for resistance), or mA (for current), and the black probe goes into the terminal marked COM (for common).

5. Measure the voltage: Hold the probes to the circuit or device you want to measure. Be careful not to touch the metal parts of the probes to avoid electrical shock.

6. Read the measurement: The display on the multimeter should now show the voltage of the circuit or device you're measuring.

7. Turn off the multimeter: Always turn off your multimeter when you're done to conserve battery life.

Safety is important when using a multimeter, especially when measuring voltage, so please take care. Always read and understand your multimeter's user manual before use.

Testing resistance with a ZOYI multimeter involves a similar procedure to testing voltage. Please ensure you know the specific instructions for your multimeter model. The process will also depend on whether your multimeter is an auto-ranging or manual ranging type. Here is a general guide:

1. Understand the difference between Auto-range and Manual range multimeters: Auto-ranging multimeters automatically select the appropriate range for the measurement you're making. Manual ranging multimeters require you to select the range yourself.

   Auto-ranging simplifies usage and reduces the chance of errors, while manual ranging meters can be a bit more complex but are often quicker as you're not waiting for the meter to select the range.

2. Identify the type of your multimeter: Check whether your multimeter is auto-range or manual range. This should be stated in your multimeter's manual or marked on the multimeter itself.

3. Disconnect the circuit: Before measuring resistance, make sure the component or circuit is fully disconnected from any power source. This is to avoid damage to the multimeter or the device you're testing.

4. Select the correct function: Turn the dial to Ω (Ohm), which is the unit for resistance.

   If you're using a manual range multimeter, select the range that is higher than what you expect the resistance to be. If you're not sure, start with the highest range and work your way down.

5. Insert the probes into the correct terminals: The red probe usually goes into the terminal marked V (for voltage), Ω (for resistance), or mA (for current), and the black probe goes into the terminal marked COM (for common).

6. Measure the resistance: Touch the probes to the component or circuit you want to measure. Be careful not to touch the metal parts of the probes to avoid electrical shock.

7. Read the measurement: The display on the multimeter should now show the resistance of the component or circuit you're measuring.

8. Turn off the multimeter: Always turn off your multimeter when you're done to conserve battery life.

Always read and understand your multimeter's user manual before use, and take care when measuring to avoid damaging your multimeter or the device you're testing.

Using a ZOYI multimeter to measure current can vary slightly depending on the specific model. Importantly, you must understand whether your multimeter is an auto-ranging or manual ranging type. Here's a comprehensive guide that includes safety considerations:

Understand the Difference Between Auto-range and Manual Range Multimeters: Auto-ranging multimeters automatically select the appropriate range for the measurement you're making, simplifying usage and reducing the chance of errors. Manual ranging multimeters, on the other hand, require you to select the range yourself, which can be a bit more complex but often quicker since you're not waiting for the meter to select the range.

Identify the Type of Your Multimeter: Check whether your multimeter is auto-range or manual range. This information should be stated in your multimeter's manual or marked on the multimeter itself.

Understand the Principles of Current Measurement: When measuring current, the multimeter must be placed in series with the circuit you're testing. That means the circuit must be broken at the point where you want to measure the current, and the multimeter must be connected to these two points so that the current flows through the multimeter.

Disconnect the Circuit: Current measurements are done in series. Before you begin, make sure the circuit is fully disconnected from any power source. This is crucial for your safety and to prevent damage to the device and the multimeter.

Select the Correct Function: Turn the dial to A~ for AC current or A- for DC current, depending on what you are measuring. If you're using a manual range multimeter, you'll need to select the range that is higher than what you expect the current to be. If you're not sure, start with the highest range and work your way down.

Insert the Probes into the Correct Terminals: Usually, the red probe goes into the terminal marked 10A or mA (depending on the expected current), and the black probe goes into the terminal marked COM (for common).

Connect the Multimeter to the Circuit: Connect the red probe to the more positive side of the break in the circuit, and the black probe to the more negative side. Now, the multimeter is in series with the circuit, and the current will flow through it when the circuit is powered.

Measure the Current: Once the multimeter is correctly connected, power the circuit and read the current measurement on the multimeter's display.

Safety Considerations: Never exceed the current rating of the multimeter, as this could burn out the fuse in the meter or even damage the meter itself. Always disconnect the circuit and the multimeter once you've finished measuring to ensure safety.

Turn off the Multimeter: Always turn off your multimeter when you're done to conserve battery life.

Remember, when dealing with electricity, safety must always be your priority. Always read and understand the instructions that come with your multimeter and take great care when making these measurements. If you are unsure or uncomfortable, it is recommended to seek help from a professional. Measuring current with a multimeter requires a higher level of expertise, and improper use could cause the meter to burn out. Proceed with caution.

Measuring capacitance using a ZOYI multimeter involves a series of steps, which can slightly vary depending on your ZOYI multimeter model. Here is a general guide, keeping safety considerations at the forefront:

Safety Precaution: Before you start, remember to discharge the capacitor. Capacitors can store energy, so even if the circuit is disconnected from a power source, a charged capacitor can still present a risk of electric shock. You can discharge a capacitor by placing a resistor across its leads, but be sure to use an appropriate resistor for the voltage involved and always use a resistor with a high enough power rating. Avoid touching the leads directly.

Disconnect the Capacitor: Remove the capacitor from the circuit. This is important because the measurement could be affected by the other components in the circuit.

Turn on the Multimeter: Turn the multimeter on and set it to the capacitance measurement mode, usually indicated by the letter 'F' or a symbol representing a capacitor.

Insert the Probes into the Correct Terminals: Usually, the black probe goes into the terminal marked COM (for common), and the red probe goes into the terminal marked with the capacitor symbol.

Measure the Capacitance: Connect the probes to the capacitor leads. It doesn't matter which probe goes to which lead, as polarity is not important when measuring capacitance. The display on the multimeter should now show the capacitance of the capacitor.

Disconnect the Probes and Turn off the Multimeter: Once you have the reading, disconnect the probes and turn off the multimeter to conserve battery life.

This process should provide a fairly accurate reading of the capacitor's capacitance. Remember, safety should be your priority when working with electronic components. Always read and understand the instructions that come with your multimeter, and take great care when making these measurements.