BOP-1K-GL 111315
3-43
3.7.3.10
CALIBRATE SUBSYSTEM
The BOP series of power supplies support software calibration. A full calibration consist of a
voltage calibration and a current calibration. These calibration procedures include steps that
prepare the unit for series or parallel operation. Both voltage and current calibrations consist of
a zero (performed on the main channels only) and positive and negative full scale calibrations
with both internal and external references. In addition, the external reference and variable gain
are also calibrated. Calibration is performed by sending commands through the GPIB or RS 232
interface.
In order to enter the calibration mode the correct calibration access code (password) must be
entered. If the password has been forgotten, refer to PAR. 3.7.3.11.1 to reset the password.
During the calibration, new calibration data is computed which is than stored in the non volatile
memory.
Refer to PAR. 4.2 for calibration equipment requirements.
During voltage calibration, the voltage, voltage protect and voltage readback are calibrated and
during current calibration the current, current protect 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 discon-
nected and the sense terminals connected to the corresponding output terminals. The digital
voltmeter will be connected to the sensing terminals (OUT S and COM S) of the power supply.
For current calibration after disconnecting all loads an appropriate shunt resistor will be con-
nected across output terminals and the digital voltmeter will be connected across the sense ter-
minals of the shunt resistor. Other high-precision and high-stability current measurement
devices (such as a zero flux current transducer) also can be used for output current calibration
and evaluation.
3.7.3.11
SYSTEM SUBSYSTEM
This subsystem controls system-level commands, including setup of the GPIB and Serial ports,
error queries, front panel setup (keyboard lockout, display illumination, and audible beeps),
passwords, command language, setup of device clear, line feed and reset, and restoring factory
calibration.
3.7.3.11.1 FORGOTTEN PASSWORDS
If the password is lost, it is possible to enable the password interface by sending
SYST:PASS:CEN POWERSUPPLIER
Once enabled, the password can be set to the default values
SYST:SEC:OVERRIDE
This restores the password to the following:
DEFAULT
Содержание BOP-GL 1KW
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