Pulse Timeout; Trigger Edge, Trigger Level, And Trigger Level Range - Keithley 2302 Instruction Manual

4-8 Long Integration Measurements
AUTO TIME searches for two consecutive RISING edges. (The setting of trigger edge does
not affect AUTO TIME.)
in the status model may get set. (See section 8 on the status model for more information.) Although
autotime does not use the user setting for trigger edge, the user setting will be used for trigger com-
mands (e.g., READ?, MEASure?, etc.).

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 while LONG INTEGRAT #2
refers to the charger channel.)
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, trigger level, and trigger level range

Use the following items of the LONG INTEGRAT#1/#2 menu item to set trigger edge, trigger
level, and trigger level range. (LONG INTEGRAT #1 refers to the battery channel while LONG
INTEGRAT #2 refers to the charger channel.)
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
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 Models 2306, 2306-VS, and 2306-PJ when on the 5A current range. For the
2306-PJ, when on the 500mA current range, use TRIGGER LEVEL mA to specify the mini-
mum pulse level detection on this current range.
For the Models 2306, 2306-VS, and 2306-PJ (battery channel #1) 5A current range —
The trigger level can be set for either the 5A, 1A, or 100mA range. For the 5A range, the trigger
level can be set from 0 to 5A in 5mA steps. For the 1A range, the trigger level can be set from 0
to 1A in 1mA steps. For the 100mA range, the trigger level can be set from 0 to 100mA in 0.1mA
steps.
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Therefore, with NEITHER edge set, the PTT (Pulse Trigger Timeout) bits
(see "Trigger level" on page 4-4).