Series 3700A System Switch/Multimeter Reference Manual
Section 5: Switching and scanning
3700AS-901-01 Rev. D/June 2018
5-27
8. To abort the scan:
▪
Front panel
: Press the
EXIT
key.
▪
Remote interface
: Use the
scan.abort()
command.
Even if the scan is aborted, the DMM remains as configured in the last completed
step of a scan that
involved measuring and channel states match the aborted state of channels in terms of which are
closed and opened.
The DMM remains as previously configured in the last completed measurement step of a scan that
involved measuring. The function associated with that configuration will have the associated DMM
attributes updated to match. All other functions will remain as configured prior to scanning.
If configured to scan the channels in the scan list again, the Series 3700A waits at the control source
for another trigger event. After the scan is complete, the Series 3700A outputs another trigger pulse,
if configured to do so. After all requested scans are complete, the instrument returns to the idle state
with the channels associated with last scan step closed.
Buffer
To recall scanned readings stored in the buffer, press the
REC
key
and turn the navigation wheel to
navigate through the buffer. See
(on page 6-5) for details on recalling buffer
readings. When finished, make sure to exit from buffer recall (press the
EXIT
key). Also see
Changing attributes of an existing scan
When a scan already exists, changing channel and DMM attributes also causes the scan to change.
Once a scan list has been defined, the Series 3700A tries to incorporate your changes into the scan.
For example, changing a DMM configuration assigned to a channel used in scanning affects the scan
list. But changing a DMM configuration on a channel not involved in scanning does not affect the scan
list. If the change impacts the ability of the scan to function properly (such as deleting something
referenced by the scan), an error message is logged and the scan list may be cleared.
To see how the scan list may have changed, view the current scan list:
1. Press the
SCAN
key when on the main display.
2. Select the
LIST
option and press the
ENTER
key.
3. Use the navigation wheel or
CURSOR
keys to scroll through the list.
For remote operation, use the
scan.list()
function.
For performance reasons, it is always better to configure all channel and DMM attributes before
creating a scan. Afterward, changes may cause the scan to take more time to modify the scan list.
You can clear an existing scan list before making any changes after making a scan list. From the front
panel, press the
SCAN
key and select the
CLEAR
option. For bus operation, use the
scan.create()
function.
Some changes may cause channels to be dropped from the list when they become paired with
another channel for a 4-wire operation. These channels will not be added back into the list during
subsequent changes that free the paired channel from a 4-wire operation. To get a recently unpaired
channel back in the list, create a new scan list or add it back into the list.
