AEMC 502 Clamp-On MeterClamp On Meter Model 502 The Clamp on Meter Model 502 is a general purpose professional clamp on. A strong mechanical case design, quality materials, full ranges and compliance to international safety and quality standards ensure a professional and reliable tool. The Model 502 is a True RMS clamp on which provides RMS measurements for measuring in non linear electrical environments. This clamp on multimeter is auto ranging, and provides the user with