2400 Series SourceMeter
®
User’s Manual Basic Source-Measure Operation 3-15
Note that compliance can also be determined by the measurement range. Depending on
which value is lower, compliance occurs at the programmed value (real compliance) or at
the maximum compliance value for the present fixed measurement range (range compli-
ance). For example, with compliance set to 2V and the 200mV measurement range
selected, compliance will occur at 210mV. On the 20V measurement range, compliance
will occur at 2V. See Section 6, “Compliance limit,” for details on real and range
compliance.
NOTE The SourceMeter must be in the edit mode (EDIT annunciator ON) to set source
and compliance values. The edit mode is selected by pressing the EDIT key.
The flashing digit for the source or compliance reading indicates that the
SourceMeter is in the edit mode. If no editing operation is performed within six
seconds, the edit mode times out and is cancelled. To return to the edit mode,
press EDIT again. While in the edit mode, the EDIT key toggles between the
source value and the compliance value.
The SOURCE
, , , and keys also enable the edit mode. They choose the
last selected field.
When editing the source value, the source is updated immediately, allowing you
to adjust the source value while the output is on.
The source value cannot be changed while the SourceMeter is performing a
sweep. This occurs with Output ON and either the SWEEP key is pressed, Offset
Compensation is enabled under Ohms, or OFF-COMP-OHMS, VOLT-COEFF,
or VAR-ALPHA functions are enabled.
When editing the compliance value, compliance is not updated until ENTER is
pressed or the edit mode is allowed to time out.
EDIT always goes to the source field first, except while sweeping, in which case
it goes into the compliance field.
Source and compliance values cannot be edited in AUTO OHMS mode. MAN-
UAL OHMS allows you to edit source and compliance. See Section 4.
Perform the following steps to edit the source and compliance values:
1. Press EDIT to enter the edit mode. The flashing digit indicates which reading
(source or compliance) is presently selected for editing. If you wish to edit the
other field, press EDIT again.
2. Use the RANGE and keys to select a range that will accommodate the value
you want to set. (See Section 7 for range information.) For best accuracy, use the
lowest possible source range.
3. Enter the desired source or compliance value. There are two methods to edit the
value: value adjust and numeric entry.
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