Keithley SourceMeter 2400, Service Manual, Page: 17 / 137

2400-902-01 (G - Feb 2006)
1-5 Model 2400 Series User’s Manual
Performance Verification
Performing the verification test procedures
Test summary
• DC voltage output accuracy
• DC voltage measurement accuracy
• DC current output accuracy
• DC current measurement accuracy
• Resistance measurement accuracy
If the Model 2400 is not within specifications and not under warranty, see the calibration
procedures in Section 2 for information on calibrating the unit.
Test considerations
When performing the verification procedures:
• Be sure to restore factory front panel defaults as outlined above.
• Make sure that the test equipment is properly warmed up and connected to the
Model 2400 INPUT/OUTPUT jacks. Also ensure that the front panel jacks are selected
with the TERMINALS key.
• Make sure the Model 2400 is set to the correct source range.
• Be sure the Model 2400 output is turned on before making measurements.
• Be sure the test equipment is set up for the proper function and range.
• Allow the Model 2400 output signal to settle before making a measurement.
• Do not connect test equipment to the Model 2400 through a scanner, multiplexer, or
other switching equipment.
WARNING
The maximum common-mode voltage (voltage between LO and chassis
ground) is 250V peak. Exceeding this value may cause a breakdown in
insulation, creating a shock hazard.
The front and rear terminals of the Model 2400 are rated for connection to
circuits rated Installation Category I only. Do not connect the Model 2400
terminals to CAT II, CAT III, or CAT IV circuits. Connection of the
SourceMeter Input/Output terminals to circuits higher than CAT I can
cause damage to the equipment or expose the operator to hazardous volt-
age.
Hazardous voltages may be present on the output and guard terminals. To
prevent electrical shock that could cause injury or death, NEVER make or
break connections to the Model 2400 while the unit is on. Power off the
equipment from the front panel or disconnect the main power cord from the
rear of the Model 2400 before handling cables connected to the outputs. Put-
ting the equipment into standby mode does not guarantee the outputs are
not powered if a hardware or software fault occurs.