Scan Operation - Keithley 3700 series Reference Manual

Section 7: Scanning
3. Press the EXIT key to leave the menu.

SCAN operation

When the SCAN key is pressed, and the EXECUTE menu item is selected, the Series 3700:
NOTE
1. Leaves the idle state. Opens channels involved in scanning along with channels that would
interfere with scanning such as AMP channels, analog backplane relays 1 and 2 on all slots,
common-side ohm backplane channels, and other channels in banks involved in scanning.
2. Closes the first channel in the scan.
3. Waits for the programmed trigger event.
4. Takes the reading.
5. After a reading is taken and stored in the buffer (if applicable), the Series 3700 opens the
closed channel, and then closes the next channel in the scan list.
6. Operation repeats to measure all channels in the scan list. After the last channel in the scan
list is measured, the Series 3700 may be configured to output a trigger pulse.
The DMM remains as 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.
NOTE
If programmed to scan the channels in the scan list again, the Series 3700 will wait at the control
source for another trigger event. After all the scan list channels are measured again, the Series
3700 will output another trigger pulse, if configured to do so. After all programmed scans are
completed, the instrument returns to the idle state with the channels associated with last scan
step closed.
7-8

BYPASS: This menu item enables or disables bypassing the first item in the scan. Related ICL
command: scan.bypass

MODE: This menu item sets the scan.mode value to one of the following:
OPEN_ALL or 0 (default setting),
OPEN_SELECTIVE or 1
FIXED_ABR or 2.
See ICL command for definitions. Related ICL command:

MEAS_CNT: This menu item sets the measure count value. Related ICL command:
scan.measurecount

SCAN_CNT: This menu item sets the scan count value. Related ICL command:
scan.scancount (on page 9-167)
A scan list must have been previously created.
Even if the scan is aborted, DMM remains as configured in the last completed step of
a scan that involved measuring. Channel states will be updated to match the aborted
state of channels in terms of which are closed and opened.
Series 3700 System Switch/Multimeter Reference Manual
(on page 9-160)
(on page 9-163)
Document Number: 3700S-901-01 Rev. A / August 2007
scan.mode (on page 9-164)