Scanning Examples; External Trigger Scan - Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User's Manual

Scanning examples

The following scanning examples assume that the Model 7700 switching module is
installed in slot 1 of the mainframe.
Tables are used for the procedure steps to configure and run scan examples. The left side
of the table provides the front panel procedure, while the right side shows the equivalent
remote programming commands. Where appropriate, menu sequences are provided to
summarize a front panel operation or selection. For example:
SHIFT SETUP > RESTORE: FACT
For the above menu sequence, press SHIFT and then SETUP to access the menu, use the
edit keys ( ,
select it.

External trigger scan

For this example, an external instrument is used to trigger the start of the 2-channel scan.
Trigger pulse requirements and trigger cable connections are covered in
NOTE
One channel (101) measures temperature and the other channel (102) measures resistance.
The two readings are stored in the buffer. Each time the scan is run, the two readings will
be appended (added) to the buffer.
A type K thermocouple is used to measure temperature. Since the internal cold (reference)
junction of the Model 7700 is being used, the thermocouple can be connected directly to
the screw terminals of the switching module.
Δ ∇
, , and ) to display RESTORE: FACT, and then press ENTER to
For this example, the front panel TRIG key can be used in place of an external
input trigger. Each time the TRIG key is pressed, the 2-channel scan will run.
Scanning 7-33
Section 8.