Model 6517B Electrometer Reference Manual
Section 14: SCPI command reference
6517B-901-01 Rev. C / August 2015
14-53
:ELEMents <item list>
This command specifies data elements for data strings.
Usage
:FORMat:ELEMents <item list>
:ELEMents?
<item list>
READing
: Includes reading in data string
CHANnel
: Includes channel number
RNUMber
: Includes reading number
UNITs
: Includes units
TSTamp
: Includes time stamp
STATus
: Includes status of reading
HUMidity
: Includes humidity reading
ETEMperature
: Includes external temperature reading
VSOurce
: Includes V-source output
Details
Each item in the list must be separated by a comma (,).
This command is used to specify the elements to be included in the data string for each measurement
conversion. You can specify from one to all six elements. Each element in the list must be separated
by a comma (,). These elements are shown in the "ASCII data format" figure (see
[:DATA]
<type>[,length]
(on page 14-51)) and described in the following:
READing
: Instrument reading. The resolution of this reading tracks the display resolution of the
instrument. An overflow and out-of-limit read as +9.9E37; zero-check reads as +9.91E37; underflow
reads as 0.00E00.
CHANnel:
Corresponds the instrument reading to the channel number of a switching card. If not
scanning, the channel number is 000.
RNUMber
: The instrument keeps track of the number of readings it has performed. This reading
counter starts at zero when the instrument is turned on or when
:SYStem:RNUMber:RESet
is sent
over the bus. When a reading is sent over the bus (for example,
:FETCh?
), the
RNUMber
element
indicates the reading number. The instrument also keeps track of the number of readings it has
stored in the buffer. When buffer readings are sent over the bus
(:TRACe:DATA?
), each reading
number is referenced to the first reading, which is #0, stored in the buffer. If using the pre-trigger to
store readings, the pre-trigger readings are assigned negative numbers.
UNITs
: This element attaches the function unit to the reading, the time unit (sec) to the time stamp,
and the channel unit (internal or external) to the channel number. An internal channel refers to an
internally installed switching card channel, while an external channel refers to the channel for an
external switch system. This element is not available for the binary formats.
TSTamp:
A time stamp is available to reference each reading to a point in time. There are two basic
types of time stamps: real-time and relative time. The real-time time stamp provides the time (24-hour
clock format) and date for each reading sent over the bus. The relative time stamp operates as a
timer that starts at zero seconds when the instrument is turned on or when the relative time stamp is
reset
(:SYSTem:TSTamp:RELative:RESet
). See the :
SYSTem:TSTamp:RELative:RESet
definition for more information. The time stamp for each reading sent over the bus is referenced, in
seconds, to the start time. After 99,999.999999 seconds, the timer resets back to zero and starts
over.
