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Keithley 2000 Repair Manual

Keithley 2000
109 pages
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Handling and cleaning
To avoid contaminating PC board traces with body oil or other foreign matter, avoid touching
the PC board traces while you are repairing the instrument. Motherboard areas covered by the
shield have high impedance devices or sensitive circuitry where contamination could cause de-
graded performance.
Handling PC boards
Observe the following precautions when handling PC boards:
Wear cotton gloves.
Only handle PC boards by the edges and shields.
Do not touch any board traces or components not associated with repair.
Do not touch areas adjacent to electrical contacts.
Use dry nitrogen gas to clean dust off PC boards.
Solder repairs
Observe the following precautions when you must solder a circuit board:
Use an OA-based (organic activated) flux, and take care not to spread the flux to other
areas of the circuit board.
Remove the flux from the work area when you have finished the repair by using pure wa-
ter with clean, foam-tipped swabs or a clean, soft brush.
Once you have removed the flux, only swab the repair area with methanol, then blow dry
the board with dry nitrogen gas.
After cleaning, allow the board to dry in a 50°C, low-humidity environment for several
hours.
Disassembly 3-3

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Keithley 2000 Specifications

General IconGeneral
Digits6.5
DC Voltage Range100 mV to 1000 V
AC Voltage Range100 mV to 750 V
Resistance Range100 Ω to 100 MΩ
ConnectivityIEEE-488 (GPIB)
Display TypeVFD

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