Keysight 34401A, Service Manual

Page: 43 / 165

To Select a Range
You can let the multimeter automatically select the range using
autoranging or you can select a fixed range using manual ranging.
•
Autoranging is selected at power-on and after a remote interface reset.
•
Autorange thresholds:
Down range at <10% of range
Up range at >120% of range
•
If the input signal is greater than the present range can measure,
the multimeter will give an overload indication (“
OVLD
”).
•
For frequency and period measurements from the front panel,
ranging applies to the signal’s input voltage, not its frequency.
•
The range is fixed for continuity (1 k Ω range) and diode (1 Vdc range).
Ranging is local to the selected function. This means that you can select
the ranging method (auto or manual) for each function independently.
When manually ranging, the selected range is local to the function;
the multimeter remembers the range when you switch between functions.
Selects a lower range and
disables autoranging.
Man
annunciator is on when
manual range is enabled.
Selects a higher range and
disables autoranging.
Toggles between autoranging
and manual ranging.
Chapter 2 Quick Start
To Select a Range
36