• Five Functions
• Up to 100 nanovolt resolution
• Electronic calibration
• HP-IB interface
• Front/rear terminals

Specifications

DC Voltage

• Input Characteristics

  Range	Maximum Reading (5½ digit)
  30 mV	± 30.3099 mV
  300 mV	± 303.099 mV
  3 V	± 3.03099 V
  30 V	± 30.3099 V
  300 V	± 303.099 V

• Input Resistance:
  30 mV, 300 mV, 3 V ranges: > 10¹⁰ ohm
  30 V, 300 V ranges: 10 Mohm ± 1%
• Maximum Input Voltage (nondestructive): Hi to Lo: 303 Vrms or 450 V peak; Hi or Lo to Earth Ground: 500 V peak

AC Voltage (true rms responding)

• Input Characteristics

  Range	Maximum Reading (5½ digit)
  300 mV	303.099 mV
  3 V	3.03099 V
  30 V	30.3099 V
  300 V	303.099 V

• Input Impedance: 1 Mohm ± 1% shunted by < 60 pF
• Frequency: 20 Hz to 300 kHz

Resistance (2-wire ohm and 4-wire ohm)

• Input Characteristics

  Range	Maximum Reading (5½ digit)
  30 ohm	30.3099 ohm
  300 ohm	303.099 ohm
  3 kohm	3.03099 kohm
  30 kohm	30.3099 kohm
  300 kohm	303.099 kohm
  3 Mohm	3.03099 Mohm
  30 Mohm	30.3099 Mohm

DC Current

• Input Characteristics

  Range	Maximum Reading (5½ digit)
  300 mA	303.099 mA
  3 A	3.03099 A

• Maximum Input (nondestructive): 3 A from < 250 V source: fuse protected

AC Current (true rms responding)

• Input Characteristics

  Range	Maximum Reading (5½ digit)
  300 mA	303.099 mA
  3 A	3.03099 A

Please contact us for more information on the HP 3478A