前后面板均有测量口，HP-IB接口,带选件 hp44492A - Reed Relay Multiplexer Assembly
DC-V 最小档 最大显示 30.30000 mV
DC-A 最小档 最大显示 302.9999 uA
Versatility, functionality, and dependability is packed into this meter! The 3457A Multimeter has seven functions with 3 1/2 to 6 1/2-digits of resolution extendable to 7 1/2-digits at reading rates from 1 reading per every 2 seconds to 1350 readings per second, and DC volts accuracy as good as 5 ppm. In addition, the input of the 3457A can be expanded up to ten channels with either of the optional plug-in multiplexer assemblies (sold separately). Measures DC Volts & Current, Resistance, True RMS AC Volts & Current, Frequency & Period. Also performs the following math functions: Null, Scale, Offset, RMS Filter, Single Pole Filter, Thermistor Linearization, dB, dBm, % Error, Pass/Fail Limit Testing, and Statistics.