Series 3700A System Switch/Multimeter Reference Manual
Section 4: Basic DMM operation
3700AS-901-01 Rev. D/June 2018
4-7
Relationship between front panel settings and remote commands
When you change the active DMM function from the front panel, the active function for all other
interfaces is changed as well. This is also true for attributes.
When you change the active DMM function through a remote interface, the front panel settings are
also changed.
Save DMM configurations
After you set up the attributes for a DMM function, you can save the settings for future use using the
DMM configuration options. You can use this configuration to:
•
Switch quickly between set ups
•
Assign the configuration to channels or channel patterns
•
Assign the configuration to scanning
DMM configurations include all the attribute settings for the selected DMM function. You can save
multiple configurations with different names so that you can save different sets of attributes for the
DMM functions.
When the DMM configuration is assigned to channels, channel patterns, or scans, the Series 3700A
verifies that the attributes that are set in the DMM configuration are valid for all the channels included
in the channel list, pattern, or scan. If there are attributes that are not valid, an error occurs and you
cannot take measurements.
However, the DMM configuration and the pole setting of the channel can be incompatible without
causing an error. For example, the DMM configuration may have a channel configured for two-pole
measurement (for example, DC volts), while the pole setting may be configured for four-pole. Or, a
channel may have a DMM configuration of four-wire ohms while the pole setting is at two-pole. If the
pole settings conflict, the pole settings that take precedence depend on the operation:
•
If you send
dmm.close
or
dmm.open
, the pole setting in the DMM configuration is used.
•
If you send
channel.close
,
channel.open
,
channel.exclusiveclose
, or
channel.exclusiveslotclose
, the pole setting of the channel is used.
The DMM configurations are saved in configuration scripts. See
page 3-35) for more information on configuration scripts.
DMM configurations are deleted if the system is reset. They are not affected by a DMM reset
(
dmm.reset
).
Memory available for DMM configurations
All DMM configurations are allocated 32 KB of memory. The number of DMM configurations you can
store varies with the number of characters of the name of the DMM configuration and the number of
attributes associated with a particular function. For example, if each DMM configuration name is six
characters, you can store 78 temperature configurations (temperature has 41 unique DMM attribute
settings). However, if the function is set to DC volts, and each name is six characters, you can store
99 DMM configurations (DC volts only has 31 unique DMM attribute settings). You can use the DMM
configuration query command to determine how many attributes are associated with a function (see
(on page 11-163)).
To see how much of the DMM configuration memory is available or used, see the
(on page 11-293) or
(on page 11-294) commands.
