Keithley 2790, Reference Manual

Page: 143 / 568

3-38 Model 2790 SourceMeter
®
Swich System Reference Manual
Basic measurement programming examples
Example #1 — continuous triggering
The following command sequence places the Model 2790 in a continuous trigger mode to
measure ACV. Whenever DATA? is sent, the last measured reading will be sent to the
computer when the Model 2790 is addressed to talk.
SYST:PRES ' Continuous measurement mode (INIT:CONT ON).
FUNC 'VOLT:AC' ' Select ACV function.
DATA? ' Request last measured reading.
Example #2 — one-shot triggering
The following command sequence places the Model 2790 in a one-shot trigger mode to
measure offset-compensated ohms. Whenever READ? is sent, a measurement will be
triggered and the measured reading will be sent to the computer when the Model 2790 is
addressed to talk.
*RST ' One-shot measurement mode (INIT:CONT OFF).
FUNC 'FRES' ' Select
Ω
4 function.
FRES:RANG 1e3 ' Select 1k
Ω
range.
FRES:OCOM ON ' Enable offset-compensated ohms.
READ? ' Trigger and return one reading.
Example #3 — temperature measurement using Model 7702
The following command sequence places the Model 2790 in a one-shot trigger mode to per-
form a thermistor temperature measurement at channel 101 (Model 7702 switching module
installed in slot 1). With channel 101 closed, the INIT command triggers one measurement,
and the DATA? command sends the measured reading to the computer when it is addressed
to talk.
*RST ' One-shot measurement mode (INIT:CONT OFF).
FUNC 'TEMP' ' Select TEMP function.
UNIT:TEMP F ' Select °F TEMP units.
TEMP:TRAN THER ' Select thermistor transducer.
ROUT:CLOS (@101) ' Close channel 101.
INIT ' Trigger one measurement.
DATA? ' Return measured reading.
Example #4 — Scan configuration (Model 7702)
The following commands configure scan channels 101, 102, and 141 of a Model 7702
installed in slot 1. When channel 101 is scanned, DCV will be selected. When channel 102
is scanned,
Ω
2 will be selected. When channel 141 is scanned, DCI will be selected.
FUNC 'VOLT',(@101) ' Configure scan channel 101 for DCV.
FUNC 'RES',(@102) ' Configure scan channel 102 for
Ω
2.
FUNC 'CURR',(@141) ' Configure scan channel 141 for DCI.
klqb
Detailed information on scanning is provided in Section 7 .