How to Calibrate a Fluke Multimeter [Step-by-Step]


As an electrical engineer from Stanford University with over 7 years of experience using multimeters.

Are you ready to learn how to ensure your Fluke multimeter performs at its best? As an expert in the field, I know just how important it is to calibrate your multimeter to ensure accurate measurements and reliable results.

But don’t worry, calibrating your Fluke multimeter doesn’t have to be a daunting task. With a few simple steps, you can fine-tune your device and get the most out of your electronic projects.

So, let’s dive in and discover the secrets to calibrating your Fluke multimeter like a pro!

Understanding Multimeter Calibration

Now, let’s talk about the nitty-gritty of multimeter calibration. I can tell you that calibration is crucial to ensure the accuracy of your multimeter readings. Think of it as a tune-up for your device, ensuring it performs at its best. It’s a process of verifying and adjusting the accuracy of your multimeter’s measurements so that you can trust the results every time.

But why is calibration so important? Well, imagine relying on a faulty multimeter to measure the voltage of an electrical circuit. The result could be disastrous, resulting in damage to your equipment or worse, harm to you or others. Calibration ensures that your multimeter is giving you accurate readings within acceptable tolerances, so you can rely on it for your electrical needs.

There are different types of calibration, including factory calibration, user calibration, and third-party calibration. As an expert, I recommend consulting your multimeter’s manual to determine which type of calibration is appropriate for your device.

Let’s move on to the next section and prepare for calibration!

Preparing for Calibration

Before jumping into the calibration process, preparing properly is essential. As an expert in the field, I cannot stress enough the importance of following safety precautions and the manufacturer’s instructions to avoid the risk of electric shock or damage to your Fluke multimeter.

You’ll need

  • Fluke multimeter
  • Electronic calibrator

Review the safety precautions in your Fluke Calibration Manual to ensure you’re following proper procedures. Keep in mind that calibration can be a complex process, so if you’re unsure about any step or aspect of the calibration process, it’s always best to refer to a specialized calibration technician or the Fluke Calibration Manual for guidance.

How to Calibrate a Fluke Multimeter

Now that you’re prepared let’s walk through the calibration procedure for your Fluke multimeter. Remember to follow the instructions carefully to ensure a successful calibration.

Step 1: Hold the Min/Max button down while turning the rotary knob to the “VAC” position. Once you see the word “CAL” displayed on the screen, you can release the Min/Max button. You are now operating in calibration mode.

Step 2: Press the Auto/Hold button again. A line of question marks will appear, and you will enter your password. Once you’ve entered the password, press the Auto/Hold button again.

Step 3: When “C-01” displays on the screen, attach the outputs from the meter to the inputs on your electronic calibrator. Consult your Fluke meter guide to determine the appropriate position for the calibrator dial and turn it to that position. To complete, press the Auto/Hold button again.

Step 4: When “C-02” displays, again consult your Fluke meter guide to determine the appropriate position for the calibrator dial and turn it to that position. To complete, press the Auto/Hold button again.

Step 5: Repeat this process until you have completed the calibration up to “C-31”.

Step 6: When the process has been completed, “END” will display on the screen, and you can press the Auto/Hold button again to complete the calibration.


The calibration process involves adjusting the settings on your multimeter to match known values, such as those provided by a reference meter or standard source.

Once you have completed the calibration process, it is important to document your results and keep records for future reference. This will help you track any changes in accuracy over time and ensure that you are always using reliable measurements. Additionally, it may be helpful to perform regular checks on your multimeter’s performance to ensure that it remains calibrated and accurate.

Taking the time to properly calibrate your Fluke multimeter can prevent inaccurate readings and potential errors in measurement. By following these simple steps, you can confidently use your Fluke multimeter for all of your electrical testings needs with confidence and accuracy.

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