... can continuously work more than 3 years. ♦ Display and surveillance 1. Large wide temperature (-30ºC ... load, day hour, low load energy, etc. LCD display recycled. After energy meter connect electricity, date, time, ... load, day hour, low load) etc. will display recycled, displayed content can be set . The default ... before pressing the button. LCD would not display if not press the button in 20 seconds ...