Section 4: Maintenance
S535 Wafer Acceptance Test System Administrative Guide
4-6
S535-924-01 Rev. B / January 2019
General replacement procedure
Severe personal injury or death due to electric shock or electrocution may result if power is
not removed before working inside the cabinet. Always disconnect the cabinet line cords
from the AC line power receptacles before opening the system cabinet. Also, never turn on
the system until all connections and safety grounds are installed.
1.
Remove power and place a lock and tag on the main circuit breakers of the power distribution
(on page 2-22)).
2.
Disconnect and tag cabling to the unit requiring removal. Do not change cable routing or
securement.
3.
Properly supporting the unit, remove it from the system cabinet.
Adjustment
Keithley Instruments recommends annual adjustment of the individual instruments in your system and
offers this as an on-site service. A field service engineer (FSE) will adjust instrumentation and perform
system verification according to the warranted system specifications. For more information about
adjustment or other S535 services, contact your sales representative.
You can also do system verification as described in the
S535 Reference Manual
(part number
S535-901-01).
Hazardous voltages may be present on the probe card adapter, even after you disengage the
interlock. Cables can retain charges after the interlock is disengaged, exposing you to live
voltages that, if contacted, may cause personal injury or death.
Never attempt to touch or change a probe card when tests are running. You must be
absolutely certain that all tests have stopped before making contact with anything in the
vicinity of the probe card adapter. Also, never run tests without a probe card installed.
For information about instrument-level adjustment, refer to documentation for each of the instruments
