KEPCO KLP Series User Manual, Rev 4 - Manual (Page 22)

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KLP 091313
1.5 FEATURES
1.5.1 LOCAL CONTROL
Two front panel rotary encoders allow adjustment of voltage and current setpoints and limits.
Operating mode of the power supply is indicated by lighting either a green (Constant Voltage) or
amber (Constant Current) LED. The output can be enabled or disabled by the front panel DC
OUTPUT switch; an associated indicator lights when the output is enabled (applied to the load).
Two 4-character LEDs normally display actual output voltage and current, or programmed volt-
age and current limits in setpoint mode.
The voltage and current controls and their associated LED displays are also used with the
FUNCTION and PROTECT switches and the 4-character status display for various other func-
tions described in PAR. 3.2. A local lockout feature (see PAR. 3.2.2.1) prevents alteration of the
power supply settings from the front panel when the power supply is operating in remote mode.
1.5.2 REMOTE CONTROL
Remote control of the KLP Power Supply can be accomplished either through digital or analog
programming.
1.5.2.1 DIGITAL PROGRAMMING
Digital control for standard models is available directly via either the IEEE 488.2 (GPIB) or RS
232 ports using SCPI commands. Digital control for E-Series models is available directly via
either the IEEE 488.2 (GPIB) port using SCPI commands or via the LAN port using SCPI com-
mands or web pages. Most features available in local mode can be accessed in remote mode
through digital programming, as well as some that are only available via digital remote program-
ming (PAR. 3.3.2). Front panel indicators showing operating mode and output voltage and cur-
rent are active when digital programming is used. Refer to the KLP Developer’s Guide for more
information about digital programming.
1.5.2.2 ANALOG PROGRAMMING
KLP Power Supplies can also be controlled remotely using switch selectable voltage or resis-
tance. Analog programming functions include voltage and current programming, enabling/dis-
abling the output, and voltage and current readback (see PAR. 3.4).
Full scale programming/readback can be programmed using either an input analog voltage or
by an input analog resistance. See PAR. 3.4 for more information.
1.5.3 DIGITAL CALIBRATION
Internal adjustments of the KLP Power Supply are automatic. Calibration can be performed in
either local or remote (using the VXI plug&play demo program) digital mode, using a calibrated
DVM and a corresponding precision shunt resistor.
Calibration constants for programming and read-back activities are calculated by the microcon-
troller and stored in the non-volatile memory. No internal adjustments are necessary. The previ-
ous calibration is saved and can be restored if desired. The original factory calibration can also
be restored. Calibration is password-protected. Refer to Section 4 for more information.