Section 3: Basic operations
Model 2290-5 5 kV Power Supply User's Manual
3-6
2290-5-900-01 Rev. A/December 2013
Set output voltage
To manually set the output voltage, with the high voltage on or off (refer to the
Front-panel
familiarization
graphic for more information):
1. Press the
SELECT
button until the
VOLTAGE SET LED
is on. The present voltage setting will
appear on the center display.
2. To change the voltage setting, enter the desired voltage using either the numeric or cursor
buttons.
3. After the new value has been entered into the center display, press
ENTER
to update the output
voltage.
The VOLTAGE SET LED will flash until
ENTER
or
CLR
is pressed to remind you that the displayed
value is not the actual programmed value.
If an Err2 message appears (illegal parameter entered), check the voltage limit to see that it is
greater than or equal to the desired set voltage. Use the
CLR
button to clear any error message (see
the
Set voltage limit
topic for more information).
If the REAR LED is on, the high voltage is programmed from the voltage applied to the analog input
on the rear panel. In this mode, the high voltage cannot be programmed from the front panel, and the
center display will show the actual output voltage in the VOLTAGE SET mode.
If you want to set the output voltage remotely, refer to
Voltage set
(see
VSET(?) <n>
). To set the
output voltage using the rear panel analog input, refer to
Analog programming and monitor
.
Turn output on
Once you have set the voltage limit, you must press the HIGH VOLTAGE enable switch (see
Set
voltage limit
for more information).
The switch should be held in the ON position for at least a half second to turn the high voltage on. If
the interlock is open, an
iloc
error message appears on the center display, the voltage will be 0,
and the yellow TRIP LED indicates that a trip has occurred (see
Front-panel familiarization
for more
information).
Set voltage limit
The voltage limit is a protection feature intended to prevent the output voltage from being set too high
or from overshooting because of large load changes. The output voltage cannot be set higher than
the voltage limit. In addition, if the output voltage ever exceeds the programmed limit by more than
10% of full scale, the trip point is reached, and the high voltage is disabled. In this case, a VTRP
(voltage trip) message appears on the center display.
It is not necessary to clear the trip before turning the high voltage back on. If it is necessary to
change a parameter before turning the high voltage back on, pressing
CLR
or placing the high
voltage switch in the off position will clear the trip.
