Series 3700 System Switch/Multimeter Reference Manual
Section 4
:
Range, Digits, Rate, Bandwidth, and Filter
Document Number: 3700S-901-01 Rev. A / August 2007
4-3
Scanning
Each channel of scan configuration can be associated with a unique DMM configuration (which
includes a range setting). When a scan completes, the DMM remains in the configuration
associated with the last completed measurement step. For remote programming, the <ch_list>
parameter is used to configure channels for a scan (see dmm.configure.set, dmm.setconfig,
scan.create and scan.add commands and the Scanning section for more details include front
panel operation).
Range remote programming (ICL)
Instrument control library (ICL) commands are sent to the Series 3700 when controlling it over
the bus. See
Instrument Control Library (ICL)
(on page 9-1) for information.
Manual ranging
The range is selected by specifying the expected reading as an absolute value using the <n>
parameter for the
dmm.range
command. The Series 3700 will then go to the most sensitive
range for that expected reading. For example, if you expect a reading of approximately 3V, let
the parameter (<n>) equal 3 to select the 10V range.
Auto ranging
Auto range is enabled by setting the
dmm.autorange
attribute (see
dmm.autorange
(on page
9-72)) to either
dmm.ON
or
1
. When auto range is enabled, the range changes automatically for
the selected range value. When auto range is disabled, the instrument remains at the selected
range. To disable auto range, either set the
dmm.autorange
attribute to
dmm.OFF
or
0
, or
send a valid
dmm.range
attribute (see
dmm.range
(on page 9-108)).
Digits ICL programming
Set the dmm.displaydigits attribute to change the display resolution for the Series 3700 from 3½
to 7½ digits. Each mainframe input function can have its own unique digits setting. Digits has no
effect on the remote reading format. The number of displayed digits does not affect accuracy or
speed.
Scanning
When a scan is configured, each channel can have its own unique digits setting.
