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Summary:

• To prepare a multimeter.

• To perform earthing test.

Step-by-step Guide:

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  To prepare a multimeter:

Step 1: Ensure that the RED probe is connected to VΩma terminal while the BLACK probe is connected to COM terminal. 

Figure 1: Connecting red probe to VΩma and black probe to COM terminals

Step 2: Turn the dial to V measuring mode.
 
Figure 2: Turning the dial to V measuring mode

Step 3: Press SELECT to change the voltage mode to AC (Alternating Current)

Figure 3: Pressing SELECT to change voltage mode to measure AC voltage

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  To perform earthing test:

Step 1: Touch the BLACK probe to the EARTH terminal and touch the RED probe to the NEUTRAL terminal on the switching mode power supply unit.

Figure 5: Neutral (white arrow) and Earth (red arrow) terminal (in that order)

Figure 6: Touching the probes on the correct terminals

Step 2: Switch ON the power supply, and you will be able to read the voltage values displayed on screen.

Figure 7: Reading the voltage values