Q: Why does the 'AutoAPO' display remain visible at startup of the LEXMAN LX-M-2000 multimeter?

On the LEXMAN LX-M-2000 digital multimeter, the AutoAPO display means Auto Power Off . This is a completely normal energy-saving safety feature that appears when the device is turned on to indicate that the automatic shutdown is activated. This feature automatically turns off the multimeter after a period of inactivity (usually 15 to 30 minutes depending on the model) to save battery. Therefore, the 'AutoAPO' display at startup does not indicate a malfunction, but simply that the device is ready to enter automatic shutdown mode if no measurements are taken during this time. The multimeter remains fully functional with this display. If you take a measurement, the device will stay on as inactivity then resets the timer. You can verify that the device is working correctly by measuring a known voltage or current. If the AutoAPO display disappears quickly during use or if you notice abnormal behavior (premature shutdown, low battery), check the battery status. According to the manufacturer's recommendations, you should replace the battery when the low battery symbol (downward arrow) appears on the screen. The multimeter uses two AAA 1.5 V batteries.

Question 1

Why does my LEXMAN LX-M-2000 digital multimeter display 0.22 V when measuring the voltage of a wall electrical outlet?

Accepted Answer

A reading of 0.22 V on a wall outlet is abnormal: a power outlet typically delivers 230 V AC (or 110-120 V depending on your region). This very low reading indicates a problem with the configuration of your LEXMAN LX-M-2000 multimeter or the measurement itself.

First, check the multimeter selector: The dial must be set to ACV (alternating current voltage) to measure a power outlet. The ACV symbol represents an alternating current voltage. If you have selected the DCV mode (direct current) or any other mode, the reading will be incorrect. Turn the dial to the ACV position.

Next, check the connection of the leads: Insert the red lead into the VΩmA terminal and the black lead into the COM terminal. This configuration is mandatory for measuring voltages. Then place the red lead on the phase (top hole of the outlet) and the black lead on the neutral or ground (bottom hole). If the leads do not make good contact with the outlet or are poorly inserted, the reading will show a very low value.

Test another outlet to confirm: Try measuring the voltage on another wall outlet in your home with the correct setting (ACV and properly connected probes). If this second outlet shows around 230 V, it confirms that the first outlet is not powered or is faulty.

If all outlets in your home display very low voltages even in ACV position with the leads correctly connected, this may indicate a problem with the multimeter itself. Check that the batteries (2 x AAA 1.5 V) are in good condition and properly installed. If the multimeter continues to display abnormal values, test it on a known voltage source (like another outlet you are sure is working) or consult customer service.

The LEXMAN LX-M-2000 is designed to measure voltages up to 600 V RMS in ACV mode, with a response range of 40 Hz to 400 Hz for household applications. A normal power voltage always generates a reading close to 230 V (50 Hz) in continental European countries.

Question 2

Why does the 'AutoAPO' display remain visible at startup of the LEXMAN LX-M-2000 multimeter?

Accepted Answer

On the LEXMAN LX-M-2000 digital multimeter, the AutoAPO display means Auto Power Off. This is a completely normal energy-saving safety feature that appears when the device is turned on to indicate that the automatic shutdown is activated.

This feature automatically turns off the multimeter after a period of inactivity (usually 15 to 30 minutes depending on the model) to save battery. Therefore, the 'AutoAPO' display at startup does not indicate a malfunction, but simply that the device is ready to enter automatic shutdown mode if no measurements are taken during this time.

The multimeter remains fully functional with this display. If you take a measurement, the device will stay on as inactivity then resets the timer. You can verify that the device is working correctly by measuring a known voltage or current.

If the AutoAPO display disappears quickly during use or if you notice abnormal behavior (premature shutdown, low battery), check the battery status. According to the manufacturer's recommendations, you should replace the battery when the low battery symbol (downward arrow) appears on the screen. The multimeter uses two AAA 1.5 V batteries.

Question 3

How to unclip the battery compartment cover of the LEXMAN LX-M-2000 multimeter?

Accepted Answer

To access the battery compartment of the LEXMAN LX-M-2000 digital multimeter, follow these steps:

Remove the cover: Start by removing the casing or cover located on the underside of the device.
Locate the cover screw: Identify the single screw that holds the battery compartment cover in place.
Loosen the screw: Using a small suitable screwdriver, loosen this screw by turning it counterclockwise until it is completely free.
Remove the cover: Once the screw is loosened, gently remove the cover to access the AAA 1.5 V batteries.
Check the poles: Before replacing the batteries, make sure to correctly identify the positive and negative poles to avoid any malfunction.

After replacing the batteries, tighten the screw securely to properly close the compartment and reposition the cover.

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