KEPCO KLP Series (older -1200 models) Operator Manual - Manual (Page 45)

KLP073008
3-5
To define a virtual model, proceed as follows. (To establish a virtual model using SCPI com-
mands, use VOLT:LIM:HIGH (see PAR. B.49) and CURR:LIM:HIGH (see PAR. B.37), respec-
tively.)
1. If the status display shows SET, tap either the CURRENT or VOLTAGE controls to take the
unit out of setpoint mode (status display goes from SET to blank)
2. . Using a thin tool (e.g., a paper clip), press the FUNCTION switch repeatedly until the status
display reads VIRT. The DC VOLTS and DC AMPERES displays show the programmed
maximum voltage and current of the virtual model. To exit without changing the virtual
model, continue to press FUNCTION until Status display is blank. To change the values pro-
ceed to step 3.
3. Press the DC OUTPUT switch once. The status display shows PASS (password) (see PAR.
4.5) and the Current Display shows 0000. Rotate CURRENT control to select a number from
0-9. Tap CURRENT control to advance to next digit. Repeat this process until all four digits
have been selected. Tap DC OUTPUT switch to accept the number. When the password is
accepted, the status display reads VIRT; proceed to step 4.
4. Rotate VOLTAGE and CURRENT controls until desired values appear in DC VOLTS and
DC AMPERES displays. Pressing and holding the control in while turning provides a finer
adjustment resolution. Under no conditions will the power supply accept limits beyond its
maximum ratings of voltage and current. For models with -1200 suffix, as the primary param-
eter is increased, the power supply will automatically decrement the secondary parameter as
necessary to maintain maximum output power at 1200 Watts. Maximum current shown on
DC AMPERES display is automatically limited to 1200W maximum.
5. Press DC OUTPUT switch to accept virtual model settings. The unit displays done, then
resets and repeats the power on sequence, showing the new virtual model parameters while
the status display flashes VIRT. Then the default protection limits (based on selected virtual
model settings) are displayed while the status display shows PROT. Last, the unit is placed
in setpoint mode with the voltage and current displays reset to 0 volts, minimum amps.
NOTE: Accepting a new virtual model resets the setpoints to zero Volts and minimum
Amperes (see NOTE, PAR. 3.2.1) and resets the OVP and OCP values to 120% of vir-
tual model maximum. If DIP switch position 3 is enabled, stored values of voltage and
current are cleared when the virtual model settings are saved.
3.2.6 SETTING VOLTAGE OR CURRENT
The VOLTAGE and CURRENT controls adjust output voltage and current limit, respectively,
when the unit is in constant voltage (CV) mode and adjust voltage limit and output current,
respectively, when the unit is in constant current (CC) mode. The mode (CV or CC) is deter-
mined by the load together with the programmed settings. As long as the voltage across the
load produces a current that is less than the programmed Current setpoint, the unit operates in
CV mode (voltage programmed to voltage setpoint, current limited by current setpoint). If the
load changes to the point that current through the load reaches the current setpoint, the unit
automatically enters CC mode (current programmed to current setpoint, voltage limited by volt-
age setpoint).
Output voltage or current can be set at the front panel in two ways: Real-time adjustment (PAR
3.2.6.1) or Setpoint adjustment (PAR. 3.2.6.2).