Simply connect to a tester or recorder to easily measure large currents. CE mark compliant CAT III 600V. For more accurate waveform recordings and analysis of harmonic signals, etc. Accuracy guaranteed for 1 year, or opening and closing of the clamp sensor 10,000 times Rated current: AC 20/50/100/200/500/1000 A. Accuracy: +/-3 percent rdg. +/-0.2 percent f.s. (45 to 66Hz). Frequency characteristics: Add to amplitude accuracy for frequencies from 40 to 1kHz: +/- 1 percent rdg. Output rate: 0.2V AC f.s. (Connect to a voltage input device providing a high input impedance of 1 megaohm). Max. current input: (For 40Hz to500 Hz: 100 percent, and for 500Hz to 1kHz: within 90 percent of derating) 1000A RMS continuous (all ranges). Max. circuit voltage: 600Vrms (Insulated conductor). Diameter: 2-5/32" or 25/32" by 3-9/64" busbar. Measures: 3-15/16" width by 8-13/16" height by 1-3/8" depth, cord length: 3m.