Hello,

We are sorry the voltage measurement should be broken.  Did you order it from Amazon? If order is not expired, you can request a replacement through online return center.

Best regards.

Hello,

Please check if it is this item#2001711007, https://www.amazon.com/dp/B078Q1624B?ref=myi_title_dp

Would you like to show us how it is by video so that we can check further? You can share video link or send attachment to service@droking.com

And what if load is not connected?

Best regards.

Hello Don,

Please check if it should be #200111, https://www.amazon.com/dp/B01L90B3RI?ref=myi_title_dp

The input negative and  output negative can’t be connected together.

Best regards.

Hello,

Please kindly notice you need to fully charge battery again after setting. And the charging current must flow through the current sensor, or it can’t show correct battery capacity.

Hello Danny,

Our meter can only monitor one phase circuit.

Best regards.

Hello,

Operating temperature is -20℃ to 65℃

Hello,

We can’t find item with 300289, please check if it is “200389”, https://www.amazon.com/dp/B07K7KHXPY?ref=myi_title_dp&th=1

There are two setting menus, you just need to program one of them.

Menu 1– included some fixed battery type. If there is no suitable battery type, please program custom menu, 3–

Hello MIKE SWILLEY,

Please connect accurate 20v voltage directly to “B+,B-“and then enter calibration menu.

Best regards.