Features and Functions 4
Keysight 34970A/34972A User’s Guide 129
General Measurement Configuration
This section contains general information to help you configure the instrument for
making measurements during a scan. Since these parameters are used by several
measurement functions, the discussion is combined into one common section.
Refer to the later sections in this chapter for more information on parameters that
are specific to a particular measurement function.
Measurement range
You can allow the instrument to automatically select the measurement range
using autoranging or you can select a fixed range using manual ranging.
Autoranging is convenient because the instrument decides which range to use for
each measurement based on the input signal. For fastest scanning operation, use
manual ranging on each measurement (some additional time is required for
autoranging since the instrument has to make a range selection).
– Autorange thresholds:
Down range at <10% of range
Up range at >120% of range
– If the input signal is greater than can be measured on the selected range, the
instrument gives an overload indication: “±OVLD” from the front panel or
“±9.90000000E+37” from the remote interface.
– For a complete list of the measurement ranges available for each function,
refer to the instrument specifications in Chapter 8.
– For temperature measurements, the instrument internally selects the range;
you cannot select which range is used. For thermocouple measurements, the
instrument internally selects the 100 mV range. For thermistor and RTD
measurements, the instrument autoranges to the correct range for the
transducer resistance measurement.
It is important that you select the measurement function before selecting other
parameters on a given channel. When you change the function on a channel, all
other settings (range, resolution, etc.) are reset to their default values.
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