Agilent 34401A - Digital Multimeter

• 6½ digit resolution
• 12 measurement functions, plus limit testing, ration and min/max average
• basic accuracy: 0.0035% DC, 0.06% AC
• 1000 V max input
• 1000 readings/second in ASCII format across the GPIB bus
• 512 reading memory

Agilent 3458A - Digital multimeter

• 8½ digit resolution
• 8-ppm 1 year dcV accuracy, optional 4-ppm
• 0.05 ppm dcV transfer accuracy
• Superior AC voltage measurements
• 100,000 readings per second at 4 1/2 digits

Hewlett Packard 3455A - Digital multimeter

• Is a 5 1/2 to 6 1/2-digit integrating voltmeter for bench or systems applications
• Measures dc volts, ac volts, and resistance
• HP-IB, auto, and manual ranging
• Is fully guarded and has greater than 60 dB normal mode noise rejection at reading rates of up to 24 readings per second on all dc ranges
• Ohms reading rates are up to 12 readings/second and an ac fast mode gives reading rates of up to 13 readings/second at frequencies above 300 Hz
• C measurements can be made with up to 1µV sensitivity
• Ohms measurements are made with either a 2-wire or 4-wire mode
• The high resolution (6 1/2-digit) mode gives dc and ohms measurements with greater than 1 part per million resolution
• The standard true rms ac to dc converter measures sinusoid and complex signals with crest factors up to 7:1 at full scale from 30 Hz to 1 MHz