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Set the oscilloscope vertical sensitivity to 50mV/div, time base to 50nsec/div and
trigger level to 50mV. Trigger mode is NORMAL.
Turn on the HV.
Initiate a discharge, using either the front panel TEST switch or the foot switch.
The discharge pulse will activate for approximately 250 milliseconds. The current
pulse detected by the capacitive sensor will be displayed on the oscilloscope.
Typical waveforms for a static shielding bag are shown in Figure 6.0-3.
Figure 6.0-3 Typical verification and shielded bag waveforms
Transfer the data from the oscilloscope to the computer in accordance with the
computer program protocol. The ETS Energy Calculation Program enables the
entire test sequence to be controlled by the computer. Set the FUNCTION
switch to AUTO nJ. Follow the computer program protocol (refer to the ECP
Operating Manual) to first activate the waveform verification test and then the
measurement sequence required for the first specimen. Repeat the procedure
for the remaining specimens. At the conclusion of the test, the computer will print
out the peak current; min, max and average energy level; and the standard
deviation plus all other information per specification. Figure 6.0-4 is a sample of
the ECP printout.
