2308-900-01 Rev. A / July 2008
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Section Topics
4-7
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Section 4: Long Integration Measurements
Auto Time does not use the user setting for trigger edge, the user setting for edge will be used for
trigger commands (For example,
READ?
and
MEASure?
).
Pulse timeout
Use the PULSE TIMEOUT item of the LONG INTEGRAT #1/#2 menu item to set pulse timeout
(LONG INTEGRAT #1 refers to the battery channel (#1) while LONG INTEGRAT #2 refers to the
charger channel (#2)).
Set pulse timeout (from 1 to 63 seconds) for long integration measurements that are configured to
be triggered by RISING or FALLING pulse edges. If a pulse is not detected within the specified
time (PULSE TIMEOUT), the “NO PULSE” message will be displayed. While the “NO PULSE”
message is displayed, the instrument continues to search for a pulse. With NEITHER edge
selected, the PULSE TIMEOUT setting is inactive.
Trigger edge and trigger level
Use the following items of the LONG INTEGRAT#1/#2 menu item to set trigger edge, and trigger
level (LONG INTEGRAT #1 refers to the battery channel (#1) while LONG INTEGRAT #2 refers to
the charger channel (#2)).
Trigger edge
A pulse edge can be used to trigger the start of the measurement (TRIGGER EDGE). 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. A pulse has to be detected before a RISING or FALLING pulse
edge can trigger a long integration measurement (see
Trigger level
).
Trigger level
Before a RISING or FALLING pulse edge can trigger the start of a long integration, the pulse must
first be detected. TRIGGER LEVEL specifies the minimum pulse level that will cause detection on
the selected current range. For the battery channel (#1), any current range is acceptable and the
trigger level setting corresponding to the selected current range will be used to detect the pulse.
For the charger channel only, the 5 A range is used.
For battery channel (#1)
-
The trigger level can be set for either the 5 A, 500 mA, 50 mA, or 5 mA
current range. For the 5 A current range, the trigger level can be set from 0 to 5A in 5 mA steps.
For the current 500 mA range, the trigger level can be set from 0 to 500 mA in 0.5 mA steps. For
the current 50 mA range, the trigger level can be set from 0 to 50 mA in 0.05 mA steps. For the
5 mA current range, the trigger level can be set from 0 mA to 5 mA in 0.005 mA steps.
The four trigger level ranges are displayed as follows using the TRIGGER LEVEL menu option:
5 A range:
PCUR TRIG LEV #1
A(5.0) 0.000 A
500 mA range: PCUR TRIG LEV #1
A(500) 0.0000 A
50 mA range:
PCUR TRIG LEV #1
mA (50) 0.00000A
5 mA range:
PCUR TRIG LEV #1
mA (5) 0.000000A
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