Table of Contents
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ABM-4082
Chapter 4
This chapter provides description of the front panel features of DMM. 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, Filtering, Relative readings, Digits of
Resolution and Measurement rate
Triggering operations – Explains trigger sources and trigger delay
Buffer operations – Discusses the reading storage buffer and buffer statistics
Limit operations – Defines how to set reading limits
System Operations – Provides details on setup saving and restoring, instrument self-test and
calibration
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 doesn't 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 20% over range except for the 1000VDC,
750VAC and diode test ranges.
Manual ranging
To select a range, simply press
selected range is displayed for a moment.
If the instrument displays the "OVR.FLW" message on a particular range, select a higher range until an
on-range reading is displayed. Use the lowest range possible without causing an overflow to ensure best
accuracy and resolution.
Autoranging
To enable autoranging, press Auto key. The AUTO annunciator turns on when autoranging is selected.
While autoranging is selected, the instrument automatically chooses the best range to measure the applied
signal. However, autoranging should not be used when optimum speed is required.
Note that up-ranging occurs at 120% of the range, while down-ranging occurs at 10% of normal range.
32
Measurement Options
or
key. The instrument changes one range per key press. The
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