Keithley SourceMeter 2425, Руководство по обслуживанию

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Model 2425 Service Manual Performance Verification 1-7
• Ensure the test equipment is set up for the proper function and range.
• Allow the Model 2425 output signal to settle before making a measurement.
• Do not connect test equipment to the Model 2425 through a scanner, multiplexer,
or other switching equipment.
WARNING The maximum common-mode voltage (voltage between LO and chas-
sis ground) is 250V peak. Exceeding this value may cause a breakdown
in insulation, creating a shock hazard.
CAUTION The maximum voltage between INPUT/OUTPUT HI and LO or
4-WIRE SENSE HI and LO is 125V 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
voltage values 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 cur-
sor 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 low-
est possible 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 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.