Figure 1-8 Exercise 4 — Trigger And Return A Single Reading - Keithley 2701 User Manual

1-40 Getting Started
Exercise 4 — Trigger and return a single reading
Exercise 5 — Trigger and return multiple readings
Trigger controlled measurements — The instrument is typically used in a non-
continuous trigger mode. In this mode, commands are used to trigger one or more
readings. After the specified number of readings are completed, the measurement process
stops.
Exercise 4 in
Exercise 5 in
readings.
Figure 1-8
Exercise 4 — Trigger and return a single reading
Trigger Configuration
Trigger Reading
FETCh?
OR
CALC:DATA?
Return result of MATH
1, 2, 3
calculation
1. If a MATH function (mX+B, percent, or 1/X) is enabled, the result of the calculation will
be returned (MATH functions are covered in Section 5).
2. If there is no MATH function enabled, FETCh? and CALC:DATA? will return the basic
reading.
3. FETCh?, CALC:DATA?, and DATA? do not trigger readings. They simply return the last
reading. If you again send one of these commands before triggering a new reading, the
old reading will be returned.
4. DATA:FRESh? can only be used once to return the same reading. Sending it again
without first triggering a new reading will cause error -230 (data corrupt or stale).
Figure 1-8 provides a command sequence to trigger and return one reading.
Figure 1-9 provides a command sequence to trigger and return multiple
INIT:CONT OFF
TRIG:COUN 1
SAMP:COUN 1
INIT
DATA?
OR
DATA:FRESh?
3,4
Return Basic Reading
Place 2701 in
non-continuous
trigger state
Set 2701 to perform
one measurement
READ?
Trigger and Return
1
Reading
Model 2701 User's Manual
Trigger and Return
Reading