KEPCO KLP Series (older -1200 models) Operator Manual - Manual (Page 61)

KLP073008
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3.6.3.6 OUTPUT SUBSYSTEM
This subsystem controls the power supply's voltage and current outputs
3.6.3.7 STATUS SUBSYSTEM
This subsystem programs the power supply status register. The power supply has two groups of
status registers: Operation and Questionable. Each group consists of three registers: Condition,
Enable, and Event.
3.6.3.8 SYSTEM SUBSYSTEM
This subsystem controls the RS 232 port, GPIB address, passwords, security, language, key-
board lockout, and compatibility with older Kepco equipment.
3.6.3.9 [SOURCE:]VOLTAGE AND [SOURCE:]CURRENT SUBSYSTEMS
These subsystems program the output voltage and current of the power supply.
3.6.3.10 CALIBRATE SUBSYSTEM
The KLP series of power supplies support software calibration. A full calibration consists of a
voltage calibration and a current calibration. Both voltage and current calibrations consist of a
zero and a full scale calibration. There are two ways to perform the calibration: locally using the
front panel keys, or remotely sending commands through the GPIB bus. These two ways cannot
be combined.
In order to enter the calibration mode the correct calibration access code (password) must be
entered. If the password has been forgotten call the factory and a secret password (which has
been assigned to your power supply) will be provided. During the calibration, new calibration
data is computed which is than stored in the non volatile memory.
The equipment required for calibration is specified in PAR. 4.2.
Because the voltage measured will be used as reference for calibration, the DVM itself must be
calibrated accurately. During voltage calibration, the voltage, overvoltage and voltage readback
are calibrated and during current calibration the current, overcurrent and current readback are
calibrated. The normal procedure is to calibrate voltage first and then current. However, you do
not have to do a complete calibration each time. If required, you may calibrate only the voltage
or the current and then proceed to saving the calibration results. For voltage calibration all loads
must be disconnected and the sense terminals connected to the corresponding output termi-
nals. The digital voltmeter will be connected to the output of the power supply. For current cali-
bration after disconnecting all loads an appropriate shunt resistor will be connected across
output terminals and the digital voltmeter will be connected across the sense terminals of the
shunt resistor.
3.6.4 PROGRAM MESSAGE STRUCTURE
SCPI program messages (commands from controller to power supply) consist of one or more
message units ending in a message terminator (required by Kepco power modules). The message
terminator is not part of the syntax; it is defined by the way your programming language indi-
cates the end of a line (“newline” character). The message unit is a keyword consisting of a sin-
gle command or query word followed by a message terminator (e.g., CURR? or
TRIG). The message unit may include a data parameter after the keyword sepa-