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M odel 4085M
4-23. CLEA N I N G
4-24. To maintain the system's low current m easurement capability, . the pin boards,
measurement pins, test fixtures, and exposed signal lines must be kept extrem ely c�ean.
If the system is operating in a clean room, where air purity is high and where personnel . :
take the necessary precautions against contamination, only periodic cleaning is required.
In any pther environment, however, cleaning must be done as often as possible.-
cleaning is necessary, apply generous amounts of alcohol and lightly scrub the area with a
soft brush. Rinse the area with clean alcohol, and allow whatever alcohol that remains on
the area to evaporate. Do not dry the area with a cloth. When cleaning the measurement
pins of a pin board, be sure to first remove the board from the 4085A as described in
paragraph 4-1 9 . Do not allow alcohol to splash into the 4085A.
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