Keithley 2290-5 - Set Output Voltage; Turn Output on; Set Voltage Limit

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.