Fluke PM3370B Auto Range, Analog, Toggle key to switch between analog mode and digital mode

FUNCTION REFERENCE 5 - 9

If switching from one mode to another results in an unsatisfactory display, press the yellow key a second time to return to the original situation.

Key sequence:

ANALOG

Toggle key to switch between analog mode and digital mode.

AUTO RANGE

Description:

The AUTO RANGE function automatically selects the input sensitivity of the vertical channels and time/div of the main timebase to obtain an optimum display of the input signal(s). AUTO RANGE is a continuous function: vertical channel or time/div settings are adapted if the input signal changes.

The AUTO RANGE function of the vertical channels automatically selects the input sensitivity. The result is that the input signal is displayed with 2 to 6.4 divisions of amplitude. The amplitude is between 1 and 3.2 divisions with DISPLAY WINDOWS on. AUTO RANGE can be turned on separately for each vertical channel. AUTO RANGE functions at input sensitivities between 5V and 50 mV/div. Input coupling is put to ac if AUTO RANGE is switched on: dc or ground coupling can be selected manually. AUTO RANGE is switched off after operation of the AMPL key, the AUTOSET key, the channel’s AUTORANGE key, channel ADD key or changing Acquisition length.

The AUTO RANGE function of the main timebase (MAIN TB) adjusts the timebase automatically so that 2 to 6 waveform periods are displayed. To turn off AUTO RANGE, press the TIME/DIV key, the AUTOSET key, or the main timebase AUTORANGE key.

In VARiable timebase mode the AUTO RANGE function tries to keep the displayed trace unchanged.

Key sequence:

AUTO RANGE

Toggle key to switch the AUTO RANGE function of main timebase and vertical channels.