To clean the instrument
If the instrument requires cleaning:
1 Remove power from the instrument.
2 Clean the instrument using a soft cloth that has been moistened in a
mixture of mild detergent and water.
3 Make sure that the instrument is completely dry before reconnecting it
to a power source.
E5900B / E5901B User's Guide Supplement
Troubleshooting the Emulator
Returning Parts for Service
109