User Manual

2400 Series SourceMeter
®
User’s Manual Data Store 9-3
Timestamp
The first source-measure reading stored in the buffer (#0000) is timestamped at
0000000.000 seconds. Subsequent readings can be recalled in absolute or delta
timestamp format. For the absolute format, the timestamp references readings to
zero seconds. For the delta format, the timestamp indicates the time between the
displayed reading and the reading before it. To set the timestamp format, see
“Timestamp format” in this section.
Displaying other buffer readings
To display the other source-readings stored in the buffer, display the desired
memory location number. The arrow keys for SOURCE and RANGE increment
and decrement the selected digit of the location number. Cursor position is con-
trolled by the EDIT arrow keys. When scrolling forward past the last stored read-
ing, the buffer wraps to the first stored reading. Conversely, when scrolling in
reverse past the first stored reading, the buffer wraps to the last stored reading. A
different key click tone announces the wrap-around.
The memory location number can also be keyed in using the 0 through 9 number
keys. Position the cursor on the appropriate digit and press the desired number
key. The cursor then moves right to the next least significant digit. For example, to
display reading #0236, position the cursor all the way to the left (MSD) and press
0, 2, 3, 6. Note that if keying in a number that exceeds the buffer size, the reading
at the highest memory location is displayed.
To exit from the data store recall mode, press EXIT.
Buffer statistics
With the data store in the recall mode, buffer statistics are displayed by using the
TOGGLE key. Use the TOGGLE key to sequence through the statistics and return
the SourceMeter to the normal data store recall state. Pressing EXIT at any time
returns the instrument to the normal source-measure display state.
NOTE Buffer statistics for V, I, Ω , and MATH are calculated and displayed sepa-
rately. For example, if ohms readings are displayed, all buffer statistics
displayed are based on ohms readings.
Minimum and maximum
This mode displays the minimum and maximum readings stored in the buffer. The
buffer location number and timestamp are also provided for these readings. If
desired, you can go to those buffer locations to obtain more data about the read-
ings.