Universal measuring device UMG 103-CBMwith clock, battery and measurement data memory (4MB)Device dimensions in mm (LxWxH): 46 x 71.5 x 98 Supply voltage: 115V ... 277V / 1.5VAInstallation category: 300V CAT IIIMeasurement in TN and TT networksMeasurement of harmonics up to 40. 4 voltage measurement inputs Measurement category: 300V CAT III Measurement in three-phase 4-wire systems up to 277V Measurement in three-phase 3-wire systems up to 480V3 current measurement inputs for current transformers Measurement category: 300V CAT II Nominal current 5A / 1A (adjustable) Measuring range: 0.005 ... 6 ArmsData memory: 4MB FlashInterfaces: RS485 (Modbus RTU / Slave)Accessories (included):33.03.345 Installation instructions including safety instructions and software GridVis quick start guide 52.00.008 RS485 terminating resistor 120 OhmGridVis Basic download: www.janitza.de/gridvis-download.html