18
Front panel operation
Long integration mode
In the long integration mode, a current measurement results from a continuous integration of
the dynamic current for a period ranging from approximately 850ms to 60sec set in 1msec
increments. The Model 2306 can determine the integration time automatically or the user can
set the integration time manually from the front panel. A pulse edge can be used to trigger the
start of the measurement as shown in
Figure 9
. Select RISING to use a rising pulse edge to start
the measurement. Select FALLING to use a falling pulse edge to start the measurement. A third
option is available if you do not want measurements controlled by pulse edges. With NEITHER
selected, measurements will start as soon as the long integration function is selected. Note that
a pulse has to be detected before a RISING or FALLING pulse edge can trigger a long
integration measurement (see
"Set trigger level and range" on page 19
). To average over several
pulse periods, the user must enter the sum of the pulse periods as the integration time.
The GPIB commands TIMEOUT, SEARCH, DETECT, and FAST are available exclusively
in the long integration mode to optimize measurement speed. For the relevance and use of these
commands regarding a particular measurement application, refer to the Model 2306 Instruction
Manual, Section 4, Long Integration Measurements.
Figure 9
Pulsed waveform
NOTE
The pulse waveform contained in
Figure 9
shows trigger level and the integration
time used by the Model 2306 for pulse current measurements.
Front panel operation for performing long integration measurements
All of the following settings are available in sub-menus of the LONG INTEGRAT #1/#2 main
menu item. Scroll through the main menu and when LONG INTEGRAT #1/#2 is displayed
press “ENTER” to access the sub-menus.
Turn on the output
Press the OPERATE key after setting the appropriate voltage and current limits for the DUT.
Select CURRENT RANGE
For Models 2306-PJ and 2302-PJ, select 500mA or 5A. For Models 2306, 2306-VS, and
2302, the 5A range is automatically selected.
Trigger
level
Average current
Integration time
(trigger set to rising)
Integration time
(trigger set to falling)
