KEPCO KLP 10-150-1.2K, Руководство пользователя

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KLP031308
3-5
3.2.6 DEFINING A VIRTUAL MODEL
The virtual model is defined by establishing a maximum programmable voltage and current for
the unit within the 1200W power limitation and the maximum voltage and current ratings listed in
Table 1-1. Once established, the unit will not accept programmed values beyond these values
whether from the front panel in local mode, or from the digital (GPIB, RS232, or LAN) or analog
input ports in remote mode. The virtual model settings are password-protected (see PAR.
3.2.5).
A multitude of possible 1200W power supplies may be emulated by defining the maximum volt-
age and current. For example, some of the possible power supplies that a KLP 36-60-1200 can
emulate are: 36V, 33A (1200W), 20V, 60A (1200W), 30V, 40A (1200W) and 35V, 30A (1050W).
Refer to Table 1-1 and Figure 1-2 for the acceptable operating regions for each model.
NOTE: Decreasing full scale voltage and/or current does not improve programming resolution.
Whenever a virtual model is set, overvoltage and overcurrent protect limits (see PAR. 3.2.8) are
reset to 120% of the new maximum value (except where necessary to maintain minimum values
as noted in PAR. 3.2.8). Also, if position 3 of the Analog I/O DIP switch is set to recall previous
setpoint values upon power-up (see Table 2-2 and PAR. 3.2.7.3), the previous setpoint value is
cleared so that after changing the virtual model the initial powerup will be at 0 Volts, minimum
current. In addition, the following parameters which are not accessible from the front panel (see
PAR. 3.3.2) should be checked to ensure that there are no settings outside the range permitted
by the new maximum programmable voltage and current.
• Storage of User-programmed Active Settings (Save/Recall).
• User-determined output Sequences.
• External Triggers: VOLT:TRIG and CURR:TRIG values
• Sequences programmed using LIST commands.
To define a virtual model, proceed as follows.
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 once so that the status dis-
play reads
VIRT
. The DC VOLTS and DC AMPERES displays show the programmed maxi-
mum voltage and current of the virtual model. To exit without changing the virtual model,
rotate either
VOLTAGE or CURRENT control until Status display reads
EXIT
, then tap DC
OUTPUT switch. To change the virtual model limits proceed to step 3.
3. Press the DC OUTPUT switch once. The status display shows
PASS
. Enter the unit pass-
word (see PAR. 3.2.5) and tap DC OUTPUT switch to accept the number. When the pass-
word is accepted, the virtual model settings in the DC VOLTS and DC AMPERES displays
begin blinking.
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. As the primary parameter is increased, the power
supply will automatically decrement the secondary parameter as necessary to maintain max-