How to use an analog multimeter (and read the needle right)

What is an analog multimeter?

An analog multimeter is a meter that shows volts, ohms and amps with a moving needle over printed scales, instead of digits on a screen. Simpson sells its 260 as an analog VOM, short for volt-ohm-milliammeter.

It does the same basic jobs as a digital meter. The difference is in how you read it: you pick a range, choose the scale that goes with it, and do a little math.

This guide sits in our electrical hub. If you have a digital meter, how to use a multimeter is the better start.

The parts you need to know

Gardner Bender's GMT-319 manual names the parts most analog meters share:

• Needle and scale plate. Several scales are printed on one arc: ohms at the top, then DC, then AC.
• Mirror strip. It sits under the needle so you can line the needle up with its reflection. That stops parallax error.
• Mechanical zero screw. It sits below the center of the scale. It sets where the needle rests with no input.
• Zero ohms dial. You use it to set the needle to 0 ohms with the leads touching.
• Range switch. It picks the function and the full-scale value.
• Jacks. Black lead in minus (COM), red lead in plus. Amps above the mA ranges often use a separate jack.

How to set it up before you measure

1. Set the mechanical zero

With the leads plugged in and nothing connected, look at the needle. It should sit on zero at the left end. If not, turn the mechanical zero screw slowly with a small screwdriver until it does. Lay the meter flat for this.

2. Check the battery and zero the ohms

Switch to an ohms range and touch the two probe tips together. The needle should swing to the right. Turn the zero ohms dial until it sits on 0 at the right end of the ohms scale.

If it won't reach 0, the batteries are low. Gardner Bender says to replace them before you go on. Re-zero every time you switch ranges or come back to ohms.

3. Pick a range higher than you expect

The GMT-319 manual says to start on the highest range when you don't know the value. Then step down until the needle sits in the upper part of the scale.

How to read the scales

This is where most mistakes happen.

Line up the needle. Move your head until the needle hides its own reflection in the mirror. Now you're looking straight on.

Use the scale that matches your range. On the GMT-319, the DC scales are marked 0-10, 0-50 and 0-250. On the 10V range you read 0-10 directly. On the 1000V range you read the 0-10 scale and multiply by 100.

Ohms read backwards. Zero ohms is on the right, and the marks crowd together toward the left.

Read the number, then multiply by the range. Gardner Bender gives the rule: x1K means multiply by 1,000.

Your meter's scales may differ, so check its manual.

Why the upper part of the scale matters. Analog accuracy is given as a percent of full scale.

Simpson lists its 260-8 at 3% of full scale on AC volts. On the 250V range, that's about 7.5V of possible error, whether the needle reads 240 or 24. So a reading near the top of a range is far more useful than one near the bottom.

Measuring with an analog meter

DC volts (batteries)

1. Set the range above the battery's voltage. For a 1.5V to 9V cell, the GMT-319 manual uses 10V DC.
2. Red probe to plus, black to minus.
3. If the needle tries to swing left, the leads are reversed. Swap them.

A fresh battery is the best way to practice. Our battery cell guide lists what a healthy 12V battery should read.

Resistance and continuity

The power must be off. Never put an ohms range on a live circuit.

1. Zero the ohms with the leads shorted.
2. Touch the probes across the fuse, wire or switch.
3. A needle that swings fully right means continuity. A needle that doesn't move means an open circuit.

Gardner Bender's manual uses Rx1 to check an extension cord, one wire at a time. Our continuity test guide covers the same check on a digital meter.

AC volts

AC is where the safety limits matter most. Read the section below before you put an analog meter near an outlet. If your meter is rated for it, set a range above 120V, such as 250V AC. Gardner Bender's manual expects about 120V across the hot and neutral slots.

DC current

Current is measured with the meter in series, so the circuit runs through it. That makes it the easiest test to get wrong. Use the mA ranges only on small battery circuits, like a flashlight.

The GMT-319's 10A jack is for short tests only: 15 seconds at most, then 30 seconds off. Never touch the probes across a battery or an outlet on an amps range.

Analog vs digital: what really differs

Loading is the big one. Ohms per volt times the range gives the meter's input.

On its 10V DC range, a 20,000 ohms-per-volt meter looks like 200,000 ohms to the circuit. That can pull down a reading in a high-resistance circuit. A 10 MΩ digital meter barely touches it.

The needle has a real upside, though. Simpson says the 260 is good at monitoring fluctuating trends. A needle that drifts or kicks shows you something a flickering number can hide.

Is your analog meter safe for wall outlets?

Check the CAT rating printed on the meter, by the jacks.

• CAT II covers plug-in loads and outlets far from the panel. Fluke puts the line at outlets more than 30 ft (10 m) from a CAT III source. The GMT-319 is CAT II 1000V.
• CAT III covers the panel and circuits close to it.
• No rating at all is common on older meters. Sanwa calls its YX360TRF a meter for low-voltage circuits.

How to choose an analog multimeter

• Look for a CAT rating and leads rated the same. A rating of CAT III 600V is the safe floor near the panel.
• Get a mirror scale. Gardner Bender puts one on the GMT-319 to stop parallax error.
• Check the fuse. The GMT-319 has a 500mA/250V fuse. The Sanwa uses 0.5A/250V. A fused current range saves the meter when you make the classic series mistake.
• Higher ohms per volt is better for electronics. All three meters list 20,000 ohms per volt on their lower DC ranges.
• A null (center-zero) scale helps if you check for balance or polarity. The Sanwa YX360TRF has one.

Where to go next

If you want a cheaper digital meter instead, our Cen-Tech multimeter guide covers Harbor Freight's range. For a full-featured CAT IV meter, see the Klein MM700 spec guide. The dial marks on either one are decoded in multimeter symbols explained.

For cordless packs, the battery runtime calculator turns amp-hours into run time. If a pack won't take a charge, see why a Ryobi battery won't charge.

What you'll need

• Analog multimeter: Check that both batteries are fresh; the ohms range runs on them
• Test leads in good shape: Same CAT rating as the meter or higher; no cracked insulation
• Small flat screwdriver: For the mechanical zero screw
• The meter's manual: It lists which scale goes with each range
• A known source to practice on: A fresh AA or 9V battery is safe and easy

Questions people ask

Change log: Nov 6, 2026: Rewritten from the 2024 archive post. Removed claims that analog meters are tougher and read high frequencies better than digital meters; added zeroing, scale reading with multipliers, full-scale accuracy, ohms-per-volt loading and CAT limits from three makers' documents.