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2308-900-01 Rev. A / July 2008
Section 3: Pulse Current Measurements
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
the trigger delay (both internal plus user) when determining integration times (see
Figure 3-2
).
When manually set using the front-panel keys, the values are changed in increments of
33.3333
μ
sec. This ensures that an integral value of 33.3333
μ
sec will be selected.
After auto time acquires a time value (auto time), the auto time is adjusted for the internal trigger
delay of 10
μ
sec (auto internal time). The auto internal time is then adjusted to be an integral time
value of 33.3333
μ
sec (auto integral time). For example:
auto time value= 28.053 msec
auto internal time= 28.053 ms - 0.010 msec = 28.043 ms
auto integral time= 28.033 ms (response returned when time setting is queried)
When a pulse time is set via the bus, the time is assumed to be an auto internal time (i.e., the
value is assumed to be adjusted for the internal delay value). This value is then adjusted to the
applicable integral value. For example:
manual time value= 5.040 msec
integral time= 5.033 ms (response returned when time setting is queried)
Average readings count
The average readings count specifies how many measurements (integrations) are performed and
averaged for each displayed reading. For example, assume that the pulse average readings count
is 10 and you are measuring PULSE HIGH. Each displayed reading will reflect the average of 10
peak pulse measurements.
Measurement configuration
See
Table 1-3
for an illustration of the menu structure. Rules to navigate the menu follow the table.
NOTE
Auto time does not account for user trigger delay - if using auto time, make sure
the user trigger delay is appropriately set for the desired overall measurement
time.
NOTE
The menu item AVER READINGS #1/#2 applies to average readings for DVM, I
and V where AVERAGE READINGS under PULSE CURRENT #1/#2 menu item
applies to pulse current measurements. Note that DVM is supported by charger
channel (#2) only.
NOTE
Current range is selected from the CURRENT RANGE #1/#2 item of the menu.
Integration times, average readings count, trigger delay and trigger level are set
from the PULSE CURRENT item of the menu. Details on integration rate,
average readings count, trigger delay and trigger level are provided in the
Overview
.
Summary of Contents for 2308
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