Analog multimeters are still highly favored by technicians thanks to their ability to visually display current fluctuations in real time. However, many users report that analog multimeters tend to develop minor issues after prolonged use.
Instead of rushing to replace your device, let’s explore how to fix common analog multimeter problems right at home.
Common Issues with Analog Multimeters
Before starting any repair, you need to identify the problem. The most common issues include:
The needle does not move even when the probes are connected to a power source
Measurement results show large deviations compared to actual values or another reference device
When shorting the probes, the needle does not return to zero on the Ohm scale
Internal circuit damage, often caused by selecting the wrong measurement range (e.g., measuring voltage while set to current mode)
Troubleshooting and Repair Guide
Check Battery and Fuse (Most Common Issue)
Up to 80% of analog multimeter failures are caused by a dead battery or a blown fuse.
How to fix:
Open the back cover and check the 9V or 1.5V battery
If there is leakage, clean the contact springs thoroughly
Check the fuse; if it is burnt or broken, replace it with the correct type (typically 0.5A/250V)
Fix a Stuck or Misaligned Needle
If the needle is stuck or does not rest at the correct position:
How to fix:
Use a small flat screwdriver to adjust the mechanical zero adjustment screw located near the needle axis on the front panel
Gently turn it until the needle aligns with the zero mark on the left side
If dust is causing the issue, use compressed air to carefully clean the internal coil area
Repair Burnt Internal Resistors (Wrong Range Selection)
If you accidentally set the meter to Ohm mode while measuring 220V mains, internal resistors may burn out.
How to fix:
Open the circuit board and identify resistors with burn marks
Use another multimeter to measure their values
Replace them with resistors of the exact same specifications
In cases of severe damage, it is better to replace the analog multimeter or consider switching to a digital one. This is often the most efficient solution in terms of time, cost, and reliability. You can easily check prices and choose popular models from trusted brands like Kyoritsu, Sanwa, or Fluke, Hioki.
Important Notes When Repairing at Home
After repair, the multimeter may lose its original accuracy. Calibration is recommended to ensure acceptable error levels
Do not attempt to fix issues related to the range selector if you lack expertise, as this can be dangerous when measuring high voltage
If the device is too old or the magnetic movement (needle core) is damaged, repairs are often ineffective. In such cases, consider upgrading to a newer generation multimeter for better performance and safety
If repairing the device is too complicated or you want to upgrade to a more durable model, visit EMIN. We offer a wide range of multimeters from budget to high-end options.
