AEMC AC Current Probe Model SR661 The SR661 is a range selectable probe that offers 3 switch selectable ranges of 10, 100 or 1000AAC. This probe has a voltage output proportional at the current measured in the jaw of the probe. The SR661 has an integral 6.5 ft (1.98m) lead terminated by BNC connector. The high accuracy and wide frequency response makes this probe an excellent choice for use with oscilloscopes. Maximum Conductor Size 2.05" (52mm) Current Range 10A, 100A, 1000Arms AC Measurement Range 0.1 to 12A, 0.1 to 120A, 1 to 1200A Output 6ft. (2m) lead with insulated BNC connector Transformation Ratio 10:1, 100:1, 1000:1 Output Signal 100mV/AAC (1V @ 10A), 10mV/AAC (1V @ 100A), 1mV/AAC(1V @ 1000A) Accuracy 50/60Hz 3% ± 10 mV @ 10A, 2% ± 5mV @100A, 1%± 1 mV @ 1000A Frequency Range 1Hz to 100kHz Phase Shift at 50Hz 1° @ 1000A Open Secondary Voltage N/A Load Impedance 1Mé & 100pF Overload 1200A for 40 mn ON then 20 mn OFF Dimensions (H x W x D) 4.37 x 8.50 x 1.77 (111 x 216 x 45mm) Weight 1.21 lbs (550g) Operating Temperature 14° to +122°F (-10° to +50°C) Storage Temperature -4° to +158°F (-20° 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