Timestamps - Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User's Manual
NOTE
Enabling/disabling buffer auto clear
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NOTE

Timestamps

Each stored reading is referenced to either a real-time clock timestamp or to a relative
timestamp.
Relative timestamp — With relative selected, there are two timestamp types for each
reading: absolute and delta. The absolute timestamp (S) references each stored reading to
zero seconds. Therefore, the first reading in the buffer has an absolute timestamp of zero
seconds. The delta timestamp (dS) indicates the time (in seconds) between the displayed
reading and the reading before it. The resolution for each timestamp is 0.001 sec.
If the buffer is empty when the Model 2750 is turned off, buffer auto clear will
enable when it is turned back on.
If the buffer is not empty, the instrument will power up to the last auto clear set-
ting. Keep in mind that if the instrument powers up with buffer auto clear off,
buffer size is fixed at 110000. You will have to enable auto clear to change the
buffer size.
The auto clear setting (on or off) is not affected by SYSTem:PRESet or *RST
(front panel or remote operation). However, front panel FACTory defaults
enables buffer auto clear.
Press SHIFT and then SETUP.
Δ ∇
Use the and keys to display the present state of buffer auto clear
(BUF AUTOCLR): Y (yes) or N (no). To retain the present state of buffer auto
clear, press ENTER or EXIT.
If you change the state of buffer auto clear, the buffer will clear.
To change the state of buffer auto clear, press
setting (Y or N).
Δ ∇
Use the or key to display the desired setting (Y=enabled, N=disabled), and
press ENTER.
For remote programming, the TRACe:CLEar and TRACe:CLEar:AUTO com-
mands are used to clear the buffer
to place the cursor on the present
(Table 6-1).
Buffer 6-3