AEMC AC Current Probe Model MN255 The MN255 is a high sensitivity probe with voltage outputs (100mV/A and 10mV/A) and combine two switch-selectable ranges of 20A and 200A, thus permitting accurate measurements at low and high levels. The MN255 has integral 5 ft (1.5m) leads terminated by shrouded banana plugs. Maximum Conductor Size 0.78" (20mm), bus bar 20x5mm Current Range 20A & 200Arms AC Measurement Range 0.1 to 24A & 0.1 to 240A Output 5ft (1.5m) lead with 4mm safety banana plug Transformation Ratio N/A Output Signal 100mV/A (1V @ 20A), 10mV/A AC (2000mV @ 200A) Accuracy 50/60Hz 1% ± 0.5A @ 20A & 200A Frequency Range 40Hz to 10KHz Phase Shift at 50Hz 2.5° @ 200A Open Secondary Voltage N/A Load Impedance 1M¦ Overload 24A & 240A for 10 min ON, 30 min OFF Dimensions (H x W x D) 5.47 x 2.00 x 1.18 (139 x 51 x 30mm) Weight With 24 (610mm) Sensor 6.3 oz (180g) Operating Temperature 14° to +131°F (-10° to +55°C) Storage Temperature -40° to +158°F (-40° to +70°C) Operating Humidity 90% RH Pollution Degree 2 Ingress Protection (Ip) IP40 EMC EN 61326-1 Safety Compliance EN/IEC 61010-1 600V CAT III,EN/IEC 61010-032