Question 1

Does this meter come with all the necessary leads?

Accepted Answer

Yes, it comes with 4 voltage sensing leads, 4 current sensing coils, and a USB power supply and cable. The diameter of the current sensing coils is 24mm and it can measure up to 600A, If you want to measure higher currents, then you have to buy larger Rogowski coils, also available here.

Question 2

How long does the batteries last?

Accepted Answer

The build in LiPo batteries last 10 hours. We recommend plugin it into mains power if planning to log for longer than 10 hours.

Question 3

How accurate is the meter?

Accepted Answer

Each meter is factory-tested and calibrated. The allowable variance is less than 0.02% Click here to see an example factory meter calibration report. Additionally each meter can be sent for calibration and receive a calibration certificate at additional cost. Click here to see an example meter calibration report .

Question 4

We are measuring negative reactive energy values, is that normal?

Accepted Answer

It is possible that your loads can generate negative reactive energy. Read this article on Wikipedia.

Question 5

What is the sample rate of the meter?

Accepted Answer

On the ME440, the sample rate of the electrical energy measurement chip is 8k samples per second.

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