Keithley SourceMeter 2400, Service Manual, Page: 18 / 137

2400-902-01 (G - Feb 2006)
Model 2400 Service Manual 1-6
Performance Verification
CAUTION
The maximum voltage between INPUT/OUTPUT HI and LO or 4-WIRE
SENSE HI and LO is 250V peak. The maximum voltage between INPUT/
OUTPUT HI and 4-WIRE SENSE HI or between INPUT/OUTPUT LO
and 4-WIRE SENSE LO is 5V. Exceeding these voltages may result in
instrument damage.
Setting the source range and output value
Before testing each verification point, you must properly set the source range and output value
as outlined below.
1. Press either the SOURCE V or SOURCE I key to select the appropriate source function.
2. Press the EDIT key as required to select the source display field. Note that the cursor
will flash in the source field while its value is being edited.
3. With the cursor in the source display field flashing, set the source range to the lowest pos-
sible range for the value to be sourced using the up or down RANGE key. For example,
you should use the 20V source range to output a 19V or 20V source value. With a 20V
source value and the 20V range selected, the source field display will appear as follows:
Vsrc:+20.0000 V
4. With the source field cursor flashing, set the source output to the required value using
either:
• The SOURCE adjustment and left and right arrow keys.
• The numeric keys.
5. Note that the source output value will be updated immediately; you need not press
ENTER when setting the source value.
Setting the measurement range
When simultaneously sourcing and measuring either voltage or current, the measure range is
coupled to the source range, and you cannot independently control the measure range. Thus, it
is not necessary for you to set the range when testing voltage or current measurement accuracy.
Compliance considerations
Compliance limits
When sourcing voltage, you can set the SourceMeter to limit current from 1nA to 1.05A.
Conversely, when sourcing current, you can set the SourceMeter to limit voltage from 200µV
to 210V. The SourceMeter output will not exceed the programmed compliance limit.
Types of compliance
There are two types of compliance that can occur: “real” and “range.” Depending upon which
value is lower, the output will clamp at either the displayed compliance setting (“real”) or at the
maximum measurement range reading (“range”).