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198-1600-00 Rev F
10.2. Calibration Steps
10.2.1. Output and Read Back Offset Calibration
This sequence sets the calibration offset values for the output and the readings of one 18kW
power module.
NOTE:
Each 18kW module must be individually calibrated
NOTE:
T
he existing calibration values can be viewed without changing them by selecting “no” if
prompted to store changes. Some calibration values can only be viewed while the power supply
is operating (CL3,4,7,&8), the associated calibration signal setting can be changed to zero (zero
volts or zero amps) to minimize power supply output while viewing the calibration values.
1. Connect the appropriate load and shunt for current calibration as determined in Section
and shown in the diagram in section
2. Enter the module A or module B read back calibration menu as defined in Section
(“rd A” or “rd b”). The module read back 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.
When viewing calibration points CL3,4,7, or 8 set the associated signal level to zero and
then press the operate button to view the calibration point. The chart in section
describes each calibration point and the text displayed for each point.
3. From the module read back calibration menu rotate the current encoder until the display
shows “CAL” “CL01” (module A) or “CL05” (module B). Press the voltage encoder switch
to view and change CL01 or CL05. When CL01 or CL05 are viewed the top display will
show “I.rd OFF- -SEt CL0#”. The bottom display shows the amp meter reading offset.
4. The amp meter offset is computed automatically when the power supply is put into operate
mode while viewing the amp meter offset value. The offset is computed to achieve a zero
amp reading when the power supply output is zero. Verify the proper load connections
before proceeding.
5.
Press the “OPER” switch to enable the power supply output. The amp meter offset value
will automatically begin to change to zero the amp meter.
6. Once the amp meter offset value stabilizes press the voltage encoder switch to accept the
computed amp meter offset value and exit the CL01 or CL05 calibration step.
7. From the module read back calibration menu rotate the current encoder until the display
shows “CAL” “CL02” (module A) or “CL06” (module B). Press the voltage encoder switch
to view and change CL02 or CL06. When CL02 or CL06 are viewed the top display will
show “E.rd OFF- -SEt CL0#”. The bottom display shows the volt meter reading offset.
8. The volt meter offset is computed automatically when the power supply is put into operate
mode while viewing the volt meter offset value. The offset is computed to achieve a zero
volt reading when the power supply output is zero. Verify the proper load connections
before proceeding.
9.
Press the “OPER” switch to enable the power supply output. The volt meter offset value
will automatically begin to change to zero the volt meter.
