Keithley 6220, Reference Manual

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Model 6220/6221 Reference Manual DC Current Source Operation 3-11
Return to Section 3 topics
Source/compliance editing notes
The following notes apply to source editing for both the Models 6220 ( Figure 3-3 )
and 6221 ( Figure 3-4 ):
1. The displayed source and/or compliance value can only be edited if the DC
source mode is selected.
2. Select a fixed range that will accommodate the source value to be set. Note
that after a source value is set (Step 4 in
Figure 3-3 ), pressing AUTO range
will select the best fixed range (if it is not already selected). Details on
“
Autorange ” are provided on page 3-13 .
3. The Model 622x must be in the edit mode in order to edit source and com-
pliance values.
4. The first press of the EDIT key selects the editing mode for the I-source
field (EDIT annunciator turns on). Each subsequent press toggles between
the source field and the compliance field. The flashing digit indicates which
reading (source or compliance) is presently selected for editing.
5. The unit will exit the editing mode if an editing action is not performed within
six seconds. To re-enter the edit mode, do one of the following.
• For the Model 6220, press a Value Adjust Key or a Cursor Key to re-
enter the edit mode for the last selected field.
• For the Model 6221, press a Cursor Key or the Rotary Knob to re-
enter the edit mode for the last selected field.
• For both models, press the EDIT key to re-enter the edit mode for the
I-source field.
6. You cannot set a digit to a value that exceeds the maximum allowable set-
ting. For the I-source field, the largest allowable value is limited by the
selected range (e.g., ±2.1000mA for the 2mA source range). For the
I-compliance field, the largest allowable value is 105.00V.
7. When editing the source value, the output is updated immediately, allowing
you to adjust the source value while the output is on. To exit the edit mode,
allow it to time out, or press
ENTER or EXIT .
8. When editing the compliance value, compliance is not updated until the edit
mode is allowed to time out, or when
ENTER or EXIT is pressed.
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