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19. To continue with the voltage output and read back calibration go to
10.2.2.Voltage Output
and Read Back Calibration
. To save changes to the current output and read back
calibration and exit the calibration menu proceed with step 20 below.
20.
From the “Local Calibration Menu” rotate the current encoder until the display shows “CAL”
“End”. Press the voltage encoder switch to exit the “Local Calibration Menu” and return to
the “Calibrate Configuration Menu”.
21. If changes were made to any calibration values you will be prompted to store the changes.
Select “yES” to accept the changes or “no” to cancel the changes to the calibration values.
10.2.2. Voltage Output and Read Back Calibration
This sequence sets the calibration points for the voltage output and the voltage read back meter.
NOTE:
The existing calibration values can be viewed without changing them by leaving the supply
in STANDBY mode (OPER indicator is off) and by sel
ecting “no” if prompted to store changes.
1. Connect the appropriate load and shunt for current calibration as determined in Section
10.1.1
and show in the diagram in section
10.1.2.
2.
Enter the “Local Calibration Menu” as defined in Section
10.1.2
(“LCL” calibration). The
calibration menu contains a “dFLt” sub menu to load default calibration values (see
10.1.3.Restoring the default calibration values
) and it contains sub menu selections for
each calibration point (CL01 to CL08). Each calibration point should be calibrated in
numerical order (first calibrate CL01, then CL02, and so on until CL08 is calibrated).
The calibration points can be viewed in any order at any time (remain in STANBY mode
to view calibration points, calibration points are not changed while the unit is in
STANDBY). The chart in section
10.1.2
describes each calibration point and the text
displayed for each point.
3.
From the “Local Calibration Menu” rotate the current encoder until the display shows
“CAL” “CL05”. Press the voltage encoder switch to view and change CL05 (upper
voltage output calibration point). When CL05 is viewed the top display will show “E.Hi
Out CL05”. The bottom display shows the calibration value
4. When calibrating the upper voltage output (CL05) the power supply output will be
enabled at approximately 95% of the voltage rating. Verify the proper load connections
before proceeding.
5.
Press the “OPER” switch to enable the power supply output.
6. Use the current encoder to adjust the output so that the volt meter across the output
terminals reads the proper value for 95% of the voltage rating. Calculate using -
unit
voltage rating x 0.95
7. There are two ways to end the calibration of CL05. The first way is to press the OPER
switch and return to standby mode (OPER/STBY lamp is off) and then press the voltage
encoder to return to the “Local Calibration Menu”. If this method is used to end CL05
then proceed with step 8 below to calibrate CL06. Optionally it is possible to
automatically calibrate CL06 before ending CL05. To automatically calibrate CL06
press the voltage encoder switch while the unit is still in operate mode (OPER/STBY
lamp is on), the display will momentarily change to “…” while CL06 is calibrated and
then the unit will change to standby mode (OPER/STBY lamp is off) and will return to
the “Local Calibration Menu”.