KEPCO KLP 10-150-2, Руководство пользователя

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3-6
KLP070312
3.2.6 CHECKING VOLTAGE/CURRENT SETPOINTS
CAUTION: BEFORE ENABLING THE OUTPUT ALWAYS CHECK THE SETPOINTS TO
AVOID POSSIBLE DAMAGE TO THE LOAD.
Check the voltage and current set points by tapping either the VOLTAGE or CURRENT control.
The status display reads
SET
, and the DC VOLTS and DC AMPERES displays show the stored
setpoints.
To accept the displayed value, tap the associated adjustment control again. To change the
value, rotate the control (see PAR. 3.2.3 to set coarse/fine preference), then tap the adjustment
control again to accept the new setting. If you decide not to change the value after rotating the
control, the previous setpoint value will be restored after about 20 seconds of inactivity, then tap
either adjustment control to accept. If a fault has been configured for AUTO recovery, the status
display flashes
>AUTO
for one second upon leaving Setpoint mode (see PAR 3.2.16.3.2).
3.2.7 PASSWORD PROTECTED FUNCTIONS
Certain functions, such as defining virtual model, system configuration, and calibration can only
be changed from the front panel after entering the unit password. Refer to PAR. 4 to change the
password. Table 4-1 shows the factory default password for each model.
1. The status display shows
PASS
(password) and the display shows
0000
with the left-most
character blinking. Rotate CURRENT control to select a number from 0-9. Tap CURRENT
control to advance to next digit.
2. Repeat this process until all four digits have been selected. Tap DC OUTPUT switch to
accept the number. If password is incorrect, the status display reads “
ERR
”. Repeat this step
to enter the correct password, or press the FUNCTION switch to exit.
3.2.8 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 1-2. 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, RS 232, or LAN) or analog
input ports in remote mode. The virtual model settings are password-protected (see PAR. 3.2.7).
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 can emu-
late are: 36V, 33A (1200W), 20V, 60A (1200W), 30V, 40A (1200W) and 35V, 30A (1050W).
Refer to Table 1-2 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. 3.2.10)
are reset to 120% of the new maximum value (except where necessary to maintain minimum
values as noted in PAR. 3.2.10). 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. 3.2.9.3), 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.