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> Hewlett packard hp 400FL ac voltmeter
Hewlett packard hp 400FL ac voltmeter
The 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 V 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.
