Keithley 2450 User Manual

Section
6: SCPI command reference Model 2450 Interactive SourceMeter® Instrument
Reference Manual
6-6 2450-901-01 Rev. B/September 2013
:READ?
This query makes measurements, places them in a reading buffer, and returns the latest reading.
Type Affected by Where saved Default value
Query only Not applicable Not applicable Not applicable
Usage
:READ?
:READ? <bufferName>
:READ? <bufferName>, <bufferElements>
<bufferName>
The name of the buffer where the reading is stored; if nothing is specified,
the reading that is stored in
defbuffer1
<bufferElements>
See Details
Details
When a reading buffer is used with a command or action that involves taking multiple readings, all readings are
available in the reading buffer. However, only the last reading is returned as a reading with the command.
If you define a specific reading buffer, the reading buffer must exist before you make the measurement.
When specifying buffer elements, you can:
• Specify buffer elements in any order.
• Include up to 14 elements in a single list. You can repeat elements as long as the number of elements
in the list is less than 14.
• Use a comma to delineate multiple elements for a data point.
The options for <bufferElements> are described in the following table.
Option Description
DATE
The date when the data point was measured
FORMatted
The measured value as it appears on the front panel
FRACtional
The fractional seconds for the data point when the data point was measured
READing
The measurement reading based on the SENS:FUNC setting; if no buffer elements
are defined, this option is used
RELative
The relative time when the data point was measured
SEConds
The seconds in UTC (Coordinated Universal Time) format when the data point was
measured
SOURce
The source value; if readback is ON, then it is the readback value, otherwise it is the
programmed source value (see :SOURce[1]:<function>:READ:BACK (on page 6-77))
SOURFORMatted
The source value as it appears on the display
SOURSTATus
The status information associated with sourcing
SOURUNIT
The unit of value associated with the source value
STATus
The status information associated with the measurement
TIME
The time for the data point
TSTamp
The timestamp for the data point
UNIT
The unit of measure associated with the measurement

Keithley 2450 Specifications

General

Brand	Keithley
Model	2450
Category	Test Equipment
Language	English