Keithley 2520, Service Manual, Page: 19 / 137

Model 2520 Pulsed Laser Diode Test System Service Manual Performance Verification 1-7
Test considerations
When performing the verification procedures:
• Restore factory front panel defaults as previously outlined.
• Ensure test equipment is fully warmed up and properly connected to the correct
Model 2520 terminals as required.
• Allow signals to settle before making a measurement.
• Do not connect test equipment to the Model 2520 through a scanner, multiplexer,
or other switching equipment.
WARNING The maximum common-mode voltage (voltage between LO and
chassis ground) is ±10V DC. Exceeding this value may cause a shock
hazard.
Testhead connections
The Model 2520 mainframe must be connected to the testhead in order to perform the
verification procedures. Using
Figure 1-1 as a guide, make testhead connections as
follows:
CAUTION Make sure power is turned off before making connections.
• Connect mainframe TESTHEAD CONN 1 to testhead MAINFRAME CONN 1.
• Connect mainframe TESTHEAD CONN 2 to testhead MAINFRAME CONN 2.
• Short pins 1 and 9 of the REMOTE INTERLOCK connector. Insert the key in the
KEY INTERLOCK and rotate to the ENABLED position to enable operation.
WARNING Shorting the interlock connector will disable the interlocks. Use
caution when performing verification tests.
NOTE Both interlocks must be enabled to perform the verification tests.