The i310s current probe is based on hall effect technology for use in measurement of both DC and AC current. The i310s may be used in conjunction with oscilloscopes and other suitable recording instruments for accurate non-intrusive current measurement. Current ranges: 30A and 300A AC rms or +/-45A and 450A DC. Measuring Ranges: +/-45A and 450A DC. Output Sensitivity: 10 mV/A (40A) to 1 mV/A (400A). Resolution: +/-50 mA (40A) to +/-100 mA (400A). Load impedance: greater than 10 k Ohms and less than or equal to 100 pF. Frequency range (small signal): DC to 20 kHz (- 3 dB). Phase shift below 1 kHz, less than 2 degrees. Temperature coefficient: +/-0.1 percent of reading / degree C. Power Supply: 9V Alkaline, MN1604/PP3. Battery life: 30 hours, low battery indicator. Inrush current: 600A AC rms maximum. Accuracy (at +23 degree C): (30A range) +/-1 percent of reading +/-50 mA, (300A range) +/-1 percent of reading +/-300 mA. Bandwidth to meet accuracy specification: 1 kHz. Conductor position sensitivity: +/-1.5 percent relative to centre reading. Working voltage: 300V AC rms or DC. Maximum conductor size: 19mm diameter. Output connection: safety BNC connector, supplied with safety 4mm adaptor. Output zero: manual adjust via thumbwheel. Cable length: 2m. Operating temperature range: -10 to +50 degree C. Storage temperature range (with battery removed): -20 to +85 degree C. Operating humidity: 15 to 85 percent (non-condensing). EMC Standards: BS EN 61236 1998 +A1, A2, and A3.