KEPCO BHK-MG VISA Driver Manual (Both Full and 1/2 Rack) - Manual (Page 6)

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BHK-MG-VISA 010906
2. DEMONSTRATION PROGRAM USING THE VISA DRIVER
The demonstration program is intended to illustrate the use of the VISA functions included with the BHK-
MG power supply. The demonstration program is installed under Windows by running SETUP.EXE. The
program as written presents a virtual front panel for control of a single BHK-MG Power Supply.
The following paragraphs describe the windows and the associated controls and indicators provided with
the demonstration program. For additional details regarding operation of the BHK-MG, refer to the operat-
ing instructions for local and remote mode found in the associated Technical Manual for the BHK-MG 40
Watt (1/2 Rack) or 200 Watt (Full Rack) Series.
Calibration Status On/Off KpBhk_CalStatus Used to enter or exit the calibration state. To enter the calibration state
a 4 digits password is required. When the instrument is shipped from
the factory the calibration password is the 4 digit model number. The
password protects the instrument against unauthorized calibrations.
Calibration Mode KpBhk_CalMode Allows the user to select the calibration mode (either voltage or current
calibration) and also allows selection of 0 (min) or full scale (max) cali-
bration.
Calibration DigPot KpBhk_CalDigPot Allows a more accurate full scale calibration in both voltage or current
mode. Moving the digital potentiometer allows the user to approach the
nominal full scale value of the corresponding power supply. This is a
coarse adjustment for the full scale value which must be followed by a
fine adjustment done with the Calibration Output function.
Calibration Output KpBhk_CalOutput Allows the user to perform the power supply calibration in both voltage
or current mode. By moving the digital to analog converter the number
of LSB's specified in the repeat count, the user can approach the 0 or
full scale value of the corresponding power supply. This is a fine adjust-
ment for the 0 or full scale value. The user can specify a repeat count
between 1 and 9 in order to avoid having to repeat sending the com-
mand
Calibration Zero KpBhk_CalZero Used to zero the output of the power supply before switching from volt-
age calibration to current calibration (to allow a calibration resistor to be
connected between the power supply output terminals.
Calibration Save KpBhk_CalSave Stores the calibration results in the nonvolatile calibration memory of
the instrument. Calibration date must be passed using the format: MM-
DD-YYYY (MM = month, DD = day, YYYY = year)
Security Code KpBhk_CalCode Allows the user to change the password to prevent accidental or unau-
thorized calibrations of the instrument. The password is stored in non-
volatile memory, and does not change when power has been off or
after a reset. To change the password, the instrument must already be
in calibration status, ensuring that the user knows the current pass-
word. If the password is lost, call the factory for support.
Close KpBhk_close This function takes the instrument off-line.
TABLE 2. FACTORY DEFAULT CALIBRATION PASSWORDS
MODEL PASSWORD
BHK 300-0.6MG BHK 300-130MG 0300
BHK 500-0.4MG BHK 500-80MG 0500
BHK 1000-0.2MG BHK 1000-40MG 1000
BHK 2000-0.1MG BHK 2000-20MG 2000
TABLE 1. BHK-MG VISA DRIVER FUNCTIONS (CONTINUED)
Purpose Function Name Description