After pressing ENTER a warning screen will display as shown in Figure 5-2. This
display gives the user a chance to abort the calibration sequence without changing any
internal calibration constants or to continue with the calibration.
Figure 5-2
Calibration Abort Screen
To abort the calibration sequence press the CANCEL key. To continue with the
calibration sequence press the ENTER key.
Current Calibration.
The first two steps of the calibration are for the current. Step one is a reading at a low
current (~10% of rating) and step two is at a high current (~90% of rating). To begin
these two steps the output of the power supply must be shorted through a current shunt
rated for the full output current of the supply. Connect one end of the shunt to the
positive output of the supply and the other to the negative output of the supply. Be sure
to use adequately sized cable for the connections. Connect the volt meter directly
across the shunt at the kelvin sense points of the shunt (not at the power supply
terminals). After pressing ENTER at the screen displayed in Figure 5-2, the screen
shown in Figure 5-3 will be displayed. This is the correct time to connect the shunt.
WARNING
Hazardous voltages exist on the rear of the
supply. Great care must be taken to avoid
both the input terminals, and while the
supply is enabled, the output terminals.
Only properly trained and qualified
personnel should perform this procedure.
Figure 5-3
Prepare Shunt Screen
When the shunt is properly connected press ENTER. At this time the supply will output
a small current and request that you tell it exactly what that current is. The display will
be as shown in Figure 5-4.
Figure 5-4
Current Calibration 1
M550004-01
5-2
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