100µV to 300V RMS 20Hz to 4MHz industrial
The HP 400FL AC Voltmeter is primarily intended as a dB Meter, however it can indicate both V and dB. The meter has a linear dB scale with a logarithmic AC scale below. The voltage range is 100 µV to 300 V full scale. Meter calibration responds to the absolute average value of the applied signal, calibrated in RMS Volts from 20Hz to 4MHz. The accuracy as a % of reading is ±4% (20 to 40Hz), ±2% (40 to 100Hz), ±1% (100Hz to 1MHz), ±2% (1 to 2MHz), ±4% (2 to 4MHz). Input impedance is 10 Mohms. The AC amplifier output is 1 V rms open circuit for full scale meter indication.