B&K Precision 5491B - Manual - Manual (Page 33)

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Chapter 4 Measurement Options
This chapter provides description of the front panel features of the multimeter. For those measurement
options accessible only by a remote interface, refer to Chapter 5 and 6. This chapter is organized as
follows:
 Measurement Configuration – Describes Ranging, Relative readings, Digits of Resolution
and Measurement rate
 Triggering operations – Explains trigger sources
 MAX and MIN operations – Records the minimum and the maximum input signals
 Limit operations – Defines how to set reading limits
 System Operations – Provides details on Beep setup, Baud rate setup, Terminal character
setup and key sound setup up
4.1 Measurement configuration
The following paragraphs discuss configuring multimeter for making measurement.
4.1.1 Range
You can let the multimeter automatically select the range using auto ranging or you can select a fixed
range using manual ranging. Auto ranging is convenient because the multimeter automatically selects
the appropriate range for each measurement. However, you can use manual ranging for faster
measurements since the multimeter does not have to determine which range to use for each
measurement. The multimeter returns back to auto ranging when power has been off or after a remote
interface reset.
Maximum readings
The full scale readings for every range on each function are 5% over range except for the 1000 VDC,
750 VAC and diode test ranges.
Manual ranging
To select a range, simply press or key. The instrument changes one range per key
press. The selected range is displayed for a moment.
If the instrument displays the “OVL.D” message on a particular range, select a higher range until a
reading is displayed. Use the lowest range possible that can display a reading to ensure best accuracy
and resolution.
Auto ranging
To enable auto ranging, press key. The AUTO annunciator turns on when auto ranging is
selected. While auto ranging is selected, the instrument automatically chooses the best range to