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DEI PVM-4210
Document Number 9100-0201 Rev 8
Directed Energy, Inc. 2000-2002
Page 11
2. Connect the input DSUB connector, and connect the output to an
appropriate load, prior to applying +24VDC power.
3. Monitor the voltage across the load, utilizing an appropriate high voltage
probe or attenuator.
4. Apply +24VDC to +28VDC power to the module, and apply a TTL level
power supply enable signal (or close the switch to connect pin 3 to pin
14 as described above). The module should produce positive and
negative output pulses with an amplitude equal to the power supply
voltage, with a pulse width and pulse recurrence frequency following
that of the incoming gate.
5. Adjust the output voltages using the power supply adjustment
potentiometers. The voltage of each channel is independently
controlled. If only one channel will be used, set the voltage of the
unused channel to zero.
6. If there is no output from the module, disable the high voltage power
supplies. Leave the module connected to the +24VDC input without high
voltage and with all connectors in place for approximately one minute to
bleed off the stored energy, then disconnect the +24VDC power to the
unit and refer to the Troubleshooting Section of this manual.
6.0 TROUBLESHOOTING
WARNING
The module contains capacitors that are used as energy storage elements.
When charged, these capacitors contain in excess of 0.02 joules of stored
energy. This is sufficient energy to cause injury. Assure that the +24VDC
power is disconnected from the pulser, and that the capacitor bank is fully
discharged and a shorting strap installed before any repairs or adjustments
are attempted. Verify with a voltmeter that all circuits are de-energized
before servicing. Dangerous voltages, floating ground planes and energy
storage exist at several locations in the module. Touching connections or
components could result in serious injury.
6.1 Troubleshooting Procedures
The table below summarizes potential problems and their solutions. If these
recommendations do not resolve the problem, DEI customer service can be
contacted for further assistance.
SYMPTOM SOLUTIONS
1. No output pulse. -No input trigger.