Our AC 20A and 100A quadruple display multifunctional meter have received rave reviews from the majority of electronic DIY lovers because of easing to connect and accurate measurement. Meanwhile, we have received feedback which is hard to press and the color of display is too deep. And some suggestions like backlight and reset use the same button. We colligated the feedbacks and suggestions, we launch a newest AC power tester. Let’s have a look what we should improve.

Firstly, this meter is bigger than quadruple display multifunctional meter. We adopted STN Full viewing LCD screen so that we can see the data change very clear and convenient from any angle.

Certainly, the bigger screen, the bigger digital displayed. It has only three items of data to show and we can switch power and current by short pressing function button. It has advantage which it just reset the present interface instead of cleaning all the data.

There are two buttons which stand for function and backlight so that it is easier to see and operate than 4 displays tester.

Measurement accuracy is most important for a meter. We do a simple test by 10A meter to show how about its measurement accuracy.

Material:  220V 100W bulb and 220V 200W bulb

According to the test, we can see the error of voltage and power is very small. Good Measurement accuracy can meet the need of measuring and monitoring electric equipments below 220V 2200W or below 110V 1100W.

Someone feedbacked inexact data or cannot be measured. Firstly, you must choose appropriate ranges.Some customers think the larger range can face various of situations. However measurement accuracy can’t work well. For example, it must reflect inexact data or cannot be measured because you use 100A meter to test 5A current.

As we all know, P(power)=U*I. But many people don’t know P(active power)=U*I*cosφ, cosφ stands for power factor, among 0~1.This meter is very suitable for pure resistive load, such as bulb, heating wire, etc. As their power factor are close 1,P is nearly equal to U*I when we test pure resistive load. We need to use power factor when testing inductive or capacitive load(such as refrigerator, washing machine, computer, TV set, etc),P＜U*I. Every family has different power factor, we suggest you to search on Google for detailed power factor so that you can measure data you need.