3-6
Pulse Current Measurements
Measurement configuration
NOTES
Current range is selected from the CURRENT RANGE #1/#2 item of the menu.
Integration times, average readings count, trigger delay, trigger level range, and
trigger level are set from the PULSE CURRENT item of the menu. Details on
integration rate, average readings count, trigger delay, trigger level range, and
trigger level are provided in the
Table 1-3 shows the menu structure. Rules to navigate the menu follow the table.
The menu item AVER READINGS #1/#2 applies to average readings for DVM, I, and
V, where the AVERAGE READINGS under PULSE CURRENT #1/#2 applies to pulse
current measurement.
Current range
For pulse current measurements, the AUTO range selection is functionally a no-op (no
operation). The instrument will not auto range with the pulse current measurement function
selected. Pulse current measurements are always performed on the 5A range. Therefore,
selecting pulse current with the 5mA range active will cause the supply to first switch to the 5A
range regardless of the current range setting (5mA or AUTO).
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).
NOTE
To get better trigger level resolution, make sure the trigger level range (battery
channel only) is set appropriately for the expected measurement.
Integration times
Use the following items of the PULSE CURRENT #1/#2 menu item to set integration times:
NOTE
Set PULSE CURRENT integration times in the range of 33.3
μ
sec to 833ms
(833333
μ
sec) in 33.3333
μ
sec step
s.
•
HIGH TIME
— Use to set the integration period (in
μ
sec) for high pulse-current
measurements. Make sure to account for the internal (15
μ
sec) and user trigger delay.
•
LOW TIME
— Use to set the integration period (in
μ
sec) for low pulse-current
measurements. Make sure to account for the internal (15
μ
sec) and user trigger delay.
•
AVERAGE TIME
— Use to set the integration period (in
μ
sec) for average
pulse-current measurements. Make sure to account for the internal (15
μ
sec) and user
trigger delay.
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