How to Measure VDC with a Multimeter? (And What You Should Know Before You Start)

Measuring DC voltage — often labeled as VDC on digital multimeters — is one of the most common tasks for both professionals and DIY users. Whether you're checking a car battery, troubleshooting electronics, or working with solar panels, knowing how to accurately measure VDC can save you time and prevent costly mistakes.

In this article, we’ll guide you step-by-step on how to measure VDC, while also comparing how different multimeter brands — like BSIDE, Fluke, and UNI-T — handle this task.

🔧 What Does VDC Mean on a Multimeter?

VDC stands for Volts Direct Current. This refers to the constant voltage from sources like batteries, power adapters, and most electronic devices. On your multimeter, VDC is typically marked with a "V" followed by a straight line (—) and possibly three dots underneath it (…).

📋 Step-by-Step: How to Measure DC Voltage

1. Turn on your multimeter.
   Set the dial to VDC (or just V with a straight line). Some models will auto-detect the range, while others may require you to select it manually.

2. Plug in the probes.

   • Black probe goes into the COM port

   • Red probe goes into the VΩmA port

3. Test the circuit or battery.

   • Touch the black probe to the negative terminal (or ground)

   • Touch the red probe to the positive terminal

   • Read the value on the display

✅ Tip: If you get a negative value, it simply means your probes are reversed — don’t worry, just switch them.

📊 BSIDE vs. Other Brands: VDC Accuracy & Usability

1. BSIDE S10 – Designed for Everyday VDC Use

• Smart auto-ranging and single-button operation make it ideal for beginners.

• Clear EBTN display shows VDC values even under sunlight.

• Affordable, yet offers USB rechargeability and compact design.

• Measures down to millivolt accuracy (±0.5%).

2. Fluke 117 – The Industrial Standard

• Excellent accuracy and build quality.

• Used by professionals, but comes at a high price point.

• Manual range selection may confuse new users.

• Bulkier design, not pocket-friendly.

3. UNI-T UT61E – Mid-range Option

• Solid accuracy (±0.8%) but lacks auto detection.

• Slower response time compared to BSIDE and Fluke.

• Budget-friendly, but the interface feels dated.

🏁 Conclusion: What's the Best Multimeter for VDC?

If you’re looking for an accurate, affordable, and beginner-friendly multimeter to measure DC voltage, the BSIDE S10 or Bside S30 is a great place to start. Compared to bulkier or more expensive brands, BSIDE focuses on intuitive design and smart functionality — perfect for those who want reliable results without overpaying.