Keithley 6517B Reference Manual page 52

Model 6517B Electrometer Reference Manual
TIMESTAMP
A time stamp is available for readings sent over the bus and for readings stored in the buffer. This
GENERAL menu selection is used to configure the time stamp for readings sent over the bus. From
the front panel, readings are sent over the bus through the COMMUNICATION selection of the MAIN
menu.
Specifically, this selection performs the following operations:

Select the type of time stamp; relative or real-time.

Reset the relative time stamp to zero.

Reset the reading number to zero.
Timestamp and the reading number are only included with each reading if they are selected as GPIB
or RS-232 data elements.
The menu items for TIMESTAMP are:
TYPE: This item is used to check or change time stamp type. Note that changing the time stamp type
clears the buffer. The two time stamp types are described as follows:

RELATIVE TIME: With this selection, time stamps are oriented to a timer and reference each
reading to a point in time. The timer starts at 0.000000 seconds when the instrument is turned on
or when the relative time stamp is reset (see "RESET-TIME" below). After 99,999.999999
seconds, the timer resets to zero seconds and starts over.

REAL-TIME: With this selection, time stamps are oriented to the real-time clock and provide the
current time (24-hour format) and date for each reading.
Time stamp type for bus readings is coupled to time stamp type for buffer readings. Therefore, if you
change time stamp type from this menu structure, it also changes in the CONFIG DATA STORE
menu structure (see Section 8).
RESET-TIME: This item is used to reset the relative time-stamp to 0.000000 seconds. The time
stamp also resets to zero seconds when the instrument is turned on. It has no effect on the real-time
clock.
RESET-RDG#: This menu item is used to reset the reading number to zero. The reading number also
resets to zero when the instrument is turned on.
6517B-901-01 Rev. C / August 2015
Section 2: Getting started
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