Series 2268 850 Watt DC Power Supplies Reference Manual
Local Operation
2268S-901-01 Rev. A / January 2015
31
Coarse and Fine Adjustment Modes
The coarse and fine adjustment modes are used for setting the voltage and current set points,
OVP and UVP settings.
Coarse adjustment mode
When using local operation to set the current and voltage set
points, use the coarse adjustment mode (default) followed by
the fine adjustment mode (described next). The coarse
adjustment mode quickly adjusts the settings in large
increments to reach the desired value.
Fine adjustment mode
Pressing the rotary Adjust/Enter control to change the mode to
fine adjustment mode, provides the ability to manipulate the last
significant digit. Once the exact desired value for the setting has
been selected, press the rotary Adjust/Enter control to commit
the value to the unit.
9 Positions on the Mode
Control Knob
Turning the rotary Adjust/Enter
control lets you...
Pressing the rotary Adjust/
Enter control lets you...
VOLTS (Voltage
Programming)
Select the voltage set point in coarse
or fine adjustment modes. See
“Automatic Mode Crossover” on
page 38.
Set the value selected and cycle
to the next setting.
AMPS (Current Programming) Select the current set point in coarse
or fine adjustment modes. See
“Constant Current (CC) Mode
Operation” on page 38.
Set the value selected and cycle
to the next setting.
FLD (Foldback)
Select Foldback option: CC, CV or
none. See “Setting Foldback Mode”
on page 49.
Set the value selected and cycle
to the next setting.
PRT (Protection)
Select the OVP set point (see page
50). Select the UVP set point (see
page 51.) Select OTP temperature
and Shutdown (see page 52.)
Set the value selected and cycle
to the next setting.
SAV (Save User Preset)
Select the user setting memory
location. See “Saving User Setting
Memory Locations” on page 59.
Save user setting memory
values.
RCL (Recall User Preset)
Select the user setting memory
location. See “Recalling User Setting
Memory Locations” on page 60.
Load user setting memory
values into the power supply.
CAP (Current Analog
Programming)
Select the programming source and
select the range.
Set the value selected and cycle
to the next setting.
VAP (Voltage Analog
Programming)
Select the programming source and
select the range.
Set the value selected and cycle
to the next setting.
PGM (Programming Options) Select the remote interface to be used
for control, local lockout or current
sharing.
Select interface/Option and
cycle to the next setting.
Summary of Contents for Keithley 2268 Series
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