Series EJ, ET, EY, FJ & FR
102002-177 Rev M2
27
\1020\02177M2.doc 17 Jun 2019
FRONT PANEL FUNCTION OPERATION
For “NC” Option, there are no controls on the front panel – only the Power switch.
HV ON Pushbutton:
A momentary press turns HV ON. Pressing this button again while the HV is still
ON will have no effect. Reset to standby is by pressing the STANDBY switch (see
STANDBY switch description) or by toggling the AC power switch OFF, waiting
for power to turn off, then turning power switch back ON.
A fault will not inhibit operation of the HV ON function, but will inhibit HV
generation via the PWM enable line. When the fault clears, the HV will
automatically re-enable.
The HV will not turn ON if the interlock is open. If the interlock is opened while the
HV ON function is active, the unit will trip to and latch in standby and once the
interlock is closed will require the HV ON button to be pressed again (or Remote HV
ON terminals on J3 to be momentarily closed) to turn the HV back ON.
For the NC option the HV ON pushbutton is continuously bypassed so that the HV is
turned ON immediately when the AC power is turned ON. With this option the
interlock will trip the unit to standby but not latch it so that immediately upon
reconnecting the interlock jumper, the HV will turn ON.
HV ON Indicator:
Red LED indicator that is lit whenever the HV ON function is active. This light
remains ON when the HV is inhibited either by a fault, HV enable, CT trip, or
optional arc inhibit.
PRESET Pushbutton:
A momentary press switches the front panel displays to read the existing settings of
the voltage and current adjustment encoders. This function operates in both local
and remote modes but only presets the local encoders.
The displays will switch back to reading the actual output levels when either the HV
ON button is pressed, (if in standby), the PRESET button is pressed a second time,
or automatically 5 seconds after pressing it. As long as the preset controls are being
adjusted the timer is reset to zero and the displays will continue to read the preset
levels. If HV ON is active and PRESET is pressed, the meters will display the
present PRESET settings, but they cannot be adjusted unless unit is first returned to
STANDBY.
