SDM009 DIN-rail multi-function Digital meter can measure AC voltage, AC current, active power, power factor,frequence and electric energy and the same time. The meter have a colorful, full-view, high definition LCD todisplay the measure parameters.AC voltage: AC 40.0-300.0V or AC 250.0-450.0V; AC Current:AC 0-100.0A, the current resolution is 0.01A; Frequence: 45.0Hz - 65.0Hz; Power Factor: 0.00-1.00PFElectric Power: 0-450000W, the electric power resolution is 0.1W when measure electric power between 0-9999.9W, otherwise the electric power resolution is 1W.Electric Energy: 0-99999kwh, the display of electric energy resolution is 0.01kwh when measure electric engery between 0-999.99kwh, the display of electric energy resolution is 0.1kwh when measure electric engery between 1000.0-9999.9kwh and the display of electric energy resolution is 1kwh when measure electric engery larger than 9999.9kwhAccuracy: 1%+/-2 wordsSpeed: 2 times per secondInstallation: Din-RailApplication Method:1. Connect the measure voltage to the 1 and 2 terminal2. Connections of meter with internal current transcompatible withmer as graph . Make the wire through the hole in the meterand the direction chose arbitrarily.3. Connections of meter with external current transcompatible withmer as graph . Make the wire through the hole in the meter,and connect the two wires of the secondary transcompatible withmer to the 3 and 4 terminal.4. When power on, the meter display the measure parameters.5. When power on, you can press the button of SAM CK last compatible with 5 seconds, then the electric energy will to be zeroand start to cumulate when release the button. And when power off, the meter can save the value of electric energyand go on cumulating data when the meter power-on next.Attention: The meter can only use compatible with measure 45-65Hz AC city electricity.Specification: D: AC40-300V built-in transcompatible withmer (CT)colour:WhiteMaterial:ABSsize:54 x 80 x 64mmPackage Contents:1 x Din Rail multifunctional meter1 x English manualOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.