User`s guide

168 Agilent 34980A Mainframe User’s Guide
4 Introduction to the Plug-In Modules for the 34980A
Module Considerations
This section lists important items and actions that can affect the
operation of your modules.
General Considerations
Environmental Operating Conditions
These modules are designed to operate in a temperature range of 0 °C to
+55 °C with non- condensing humidity. The maximum humidity is 80% at
40 °C or higher. Do not use in locations where conductive dust or
electrolytic salt dust may be present.
These modules should be operated in an indoor environment where
temperature and humidity are controlled. Condensation can pose a
potential shock hazard. Condensation can occur when the modules are
moved from a cold to a warm environment, or if the temperature and/or
humidity of the environment changes quickly.
The table on page 169 shows maximum voltage, current and power
dissipation ratings for each module. If conditions change, ensure that
condensation has evaporated and the instrument has thermally stabilized
until pollution degree 1 conditions are restored before turning on power
to the equipment.
NOTE
To reduce wear on the internal DMM relays, wire like functions
on adjacent channels.
NOTE
Pollution Degree 1: No pollution or only dry, non-conductive
pollution occurs. The pollution has no influence (on insulation)
(IEC 61010-1 2nd Edition).
NOTE
Pollution Degree 2: Normally only non-conductive pollution
occurs. Occasionally, a temporary conductivity (leakage current
between isolated conductors) caused by condensation can be
expected (IEC 61010-1 2nd Edition).
CAUTION
For proper module cooling, all unused slots must be covered.