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Local Operation 57
b. Select the low range by pressing
c. Press and check that the display indicates "C:RNG" and the maximum low range value. This
means that the low range is selected.
2. Set Main Level
a. Press
and note that the display indicates "CURR" and the minimum low range CC value.
b. Set the main current level to 1 amp by pressing
c. Press again and check that the display indicates "CURR 1.0000".
Note that you can use the
ENTRY keys to increment ( ) or decrement ( ) the main level CURR setting. You
can see the CURR setting being incremented or decremented one step at a time each time you press the applicable Input
key. The values are entered automatically (you don’t press the Enter key). Remember that if the CC mode is active, the
incremented or decremented value will immediately change the actual input.
3. Set Slew Rate - There are 12 discrete slew rate steps in each range (low and high). Any slew rate can be
programmed (there are no upper and lower limits that would cause an error). The Multiple Electronic Load
automatically selects one of 12 slew rates that is closest to the programmed value.
a. First press the
(blue shift key) and note that the Shift annunciator comes on. Now press
(shifted Tran Level key) to determine the slew setting. Note that the display indicates "C:SLW" and the
maximum slew rate setting for the low current range.
b. Set the slew rate to 0.05 A/
µ
s by pressing
c. Press and again and check that the display indicates “C:SLW 0.05000" (or the closest slew
rate step to this value depending upon the module being programmed).
4. Set Transient Level - The transient current level is meaningful only if transient operation (described later) is turned
on. Remember that you set the main current level to 1 amp in step 2. In CC mode, the transient level must be set to
a higher level than the main level.
a. Press
and note that the display indicates "C:TLV" and the minimum low range CC value.
b. Set the transient CC level to 2 amps by pressing
c. Press again and note that the display indicates "C:TLV 2.0000". Note that you can use the
Input ENTRY keys to increment and decrement the transient current level. Operation is similar to that
described above for the main current level.
Setting CR Values
The CR values for the selected channel are programmed by pressing the applicable FUNCTION keys and then setting the
desired value using the ENTRY keys. The display identifies the selected function; for example, R:RNG identifies resistance
range. See Appendix A for considerations regarding high-resistance applications.
Programming Ranges
The resistance values can be programmed in a low, middle, or high range. Note that all resistance levels are programmed in
ohms and the slew rate is in amps/microsecond or volts/microsecond depending upon which resistance range is selected.
Note On the Agilent 60501 module, the front panel will display 20000 for the high resistance range even
though 10K is the maximum value that can be programmed.
Changing the programming range can cause the present CR settings to be automatically adjusted to fit within the new range.
For example, assume that you are programming the Agilent 60502A 300 Watt module, the present range is the middle range
(1 to 1 k ohms, R:RNG 1000.0), and the present settings are: