Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
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4 Introduction to the Plug-In Modules for the <strong>34980A</strong><br />
Module Considerations<br />
This section lists important items and actions that can affect the<br />
operation of your modules.<br />
General Considerations<br />
NOTE<br />
Environmental Operating Conditions<br />
These modules are designed to operate in a temperature range of 0 °C to<br />
+55 °C with non- condensing humidity. The maximum humidity is 80% at<br />
40 °C or higher. Do not use in locations where conductive dust or<br />
electrolytic salt dust may be present.<br />
These modules should be operated in an indoor environment where<br />
temperature and humidity are controlled. Condensation can pose a<br />
potential shock hazard. Condensation can occur when the modules are<br />
moved from a cold to a warm environment, or if the temperature and/or<br />
humidity of the environment changes quickly.<br />
The table on page 169 shows maximum voltage, current and power<br />
dissipation ratings for each module. If conditions change, ensure that<br />
condensation has evaporated and the instrument has thermally stabilized<br />
until pollution degree 1 conditions are restored before turning on power<br />
to the equipment.<br />
NOTE<br />
NOTE<br />
CAUTION<br />
To reduce wear on the internal DMM relays, wire like functions<br />
on adjacent channels.<br />
Pollution Degree 1: No pollution or only dry, non-conductive<br />
pollution occurs. The pollution has no influence (on insulation)<br />
(IEC 61010-1 2nd Edition).<br />
Pollution Degree 2: Normally only non-conductive pollution<br />
occurs. Occasionally, a temporary conductivity (leakage current<br />
between isolated conductors) caused by condensation can be<br />
expected (IEC 61010-1 2nd Edition).<br />
For proper module cooling, all unused slots must be covered.<br />
168 <strong>Agilent</strong> <strong>34980A</strong> Mainframe User’s Guide