Keithley 7999-2, Instruction Manual

Page: 17 / 44

2-2 Connections
Introduction
This section contains information about overall card configuration and connections and is
organized as follows:
• Handling precautions
• Card configuration
• Connections
WARNING The procedures in this section are intended only for qualified service per-
sonnel. Do not perform these procedures unless you are qualified to do so.
Failure to recognize and observe normal safety precautions could result in
personal injury or death.
Handling precautions
To maintain high-impedance isolation between channels, care should be taken when han-
dling the card to avoid contamination from such foreign materials as body oils. Such contami-
nation can reduce isolation resistance. To avoid possible contamination:
• Always grasp the card by the case.
• Do not touch connector insulators.
• Operate the card in a clean environment. If the card becomes contaminated, it should be
thoroughly cleaned as explained in Section 4.