Long Integration Measurements 4-7
Measurement configuration
NOTE Current range is selected from the CURRENT RANGE #1/#2 item of the menu.
Integration time, trigger edge, trigger level range, trigger level, and pulse timeout are
set from the LONG INTEGRAT #1/#2 item of the menu. Details on integration time,
trigger edge, trigger level range, trigger level, and pulse timeout are provided in the
“Overview”.
Table 1-3 shows the menu structure. Rules to navigate the menu follow the table.
Current range
For long integration measurements, the AUTO range selection is functionally a no-op (no
operation). The instrument will not autorange with the long integration measurement function
selected. Long integration measurements are always performed on the 5A range. Therefore,
selecting long integration with the 5mA range active will cause the supply to first switch to the
5A range.
NOTE T
o get better trigger level resolution, make sure the trigger level range is set appro-
priately for the expected measurement (set from TRIG LEVE
L RANGE under LONG
INTEGRAT #1 menu).
Current range is linked to current limit. Therefore,
as a general rule, the user selects the cur-
rent range before setting the current limit. See “Outputting
voltage and current” (in Section 2)
for details on current range and current limit. Current range is selected from CURRENT
RANGE #1/#2 item of the menu (CURRENT RANGE #1 refers to the battery channel while
CURRENT RANGE #2 refers to the charger channel).
Integration time
Use the following items of the LONG INTEGRAT #1/#2 menu item to set the integration
time. (LONG INTEGRAT #1 refers to the battery channel while LONG INTEGRAT #2 refers
to the charger channel).
INTEGRATION TIME
Manually set the long integration time. For 60Hz power line frequency, integration time can
be set from 850msec to 60 sec (1 ms step value). For 50Hz power line frequency, integration
time can be set from 840msec to 60 sec (1 ms step value).
AUTO TIME
Use to automatically set the integration time. When the AUTO TIME operation is performed,
the instrument measures the time between two rising pulse edges and sets an appropriate inte-
gration time that will encompass the high and low periods of a single pulse.
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