Keithley 2700, User Manual, Page: 230 / 500

Model 2700 Multimeter/Switch System User’s Manual Scanning 7-17
Step 3: Enable immediate scan
The present state of immediate scan (IMM SCAN) is displayed; Y (yes, which is the
factory and *RST default) or N (no). With immediate scan enabled, the scan will start
when you press the STEP or SCAN key. Use the
Δ
or
∇
key to display IMM SCAN: Y,
and press ENTER.
NOTE
Disable immediate scan (IMM SCAN: N) when you wish to use a monitored
reading limit to trigger the start of the scan. This technique to start a scan is
covered later in this section. See
“Scan operation,” page 7-22 .
Step 4: Timer controlled scan
The present state of the TIMER will be displayed; NO or YES. If you do not wish to use
the timer, use the
Δ
or
∇
key to display TIMER? NO (which is the factory and *RST
default) and press ENTER.
To use the timer, use the
Δ
or
∇
key to display TIMER? YES and press ENTER. The
timer interval is displayed in the hour/minute/second format. The timer can be set from
0.001 sec (00H:00M:00.001S) to 99 hr, 99 min, 99.999 sec (99H:99M:99.999S). Note that
pressing the AUTO key sets the timer to 0.001 sec. With the desired interval displayed,
press ENTER.
Step 5: Set the reading count
The displayed reading count (RDG CNT) sets the number channels to scan (STEP) or the
number of scans to run (SCAN). You can change the reading count to any finite value from
2 to 55000, or you can select infinite (continuous scanning). To select infinite, set the
reading count to 00000 to display INF. With the desired reading count setting displayed,
press ENTER. The instrument returns to the normal measurement mode.
See “Trigger models,” page 7-4 , for details on reading count.