Pulse Current Measurement Procedure; Determining Correct Trigger Level (Pulse Current) - Keithley 2302 Instruction Manual

3-10 Pulse Current Measurements

Pulse current measurement procedure

The following steps summarize the procedure to perform pulse measurements:
1.
2.
3.
4.
5.
6.
7.
NOTES
No pulses detected
If no pulses are detected, current will not be measured (i.e. -----A) and the "NO PULSE"
message will be displayed. The "NO PULSE" message is displayed with dashes or the last valid
pulse reading. Dashes are shown if the pulse-current measurement settings are not appropriate
for detecting pulses. The last valid pulse is shown if the pulse disappears while taking readings
and no change in pulse settings was made.
Pulses are not detected with the output OFF. With the output ON, pulses will not be detected
if the trigger level is too low or too high. Perform the following procedure to find an appropriate
trigger level. Make sure the voltage and current settings are appropriate for detecting pulses.

Determining correct trigger level (pulse current)

NOTE
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Press the MENU key to access the menu.
Select PULSE CURRENT #1 or #2 by scrolling through the primary menu items (use
the and keys to scroll).
For the battery channel (#1), select the desired trigger level range (5A, 1A, or 100mA)
from the TRIG LEVEL RANGE item of the PULSE CURRENT #1 menu. Pulse
measurements for both channels are automatically performed on the 5A current range.
From the PULSE CURRENT #1/#2 item of the menu, set the trigger level, trigger delay
(optional), integration times, and average readings count (optional). (See NOTE.)
As explained in Section 2, set the output voltage and current limit, and press OPERATE.
Press the DISPLAY key and select the PULSE CURRENT display type.
Use the or key to display the desired pulse measurement: PULSE HIGH, PULSE
LOW, or PULSE AVG.
For the charger channel (#2), the trigger level range is automatically set to the 0–5A
range (non-configurable).
Setting the trigger level with the output off will cause the pulse timeout message to
appear. However, the trigger level will be set.
If possible, always use an oscilloscope to determine the timing and transient
characteristics of a DUT. The waveform information is very useful in setting up the
2306, reducing setup time and achieving maximum performance and productivity.
The voltage and current characteristics of the DUT can be determined with a
2-channel Oscilloscope with differential inputs, a 0.1Ω resistor used as a current
sense resistor, and a voltage probe at the DUT as shown in
oscilloscope inputs are required to prevent grounding the supply output leads.
Figure 3-3. Differential