Agilent Technologies L4400 Occurs. The pollution has no influence on insulation IEC, 2nd Edition

3Operating and Programming

Environmental Operating Conditions

The L4400 series instruments 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.

The L4400 instruments 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 instrument is moved from a cold to a warm environment, or if the temperature and/or humidity of the environment changes quickly.

When used in pollution degree 1 conditions, the maximum voltage rating for the Analog Buses is 300V. When used in pollution degree 2 conditions, the maximum voltage rating is 100V. 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	Pollution Degree 1: No pollution or only dry, non-conductive pollution
		occurs. The pollution has no influence (on insulation) (IEC 61010-1
		2nd Edition).
		Pollution Degree 2: Normally only non-conductive pollution occurs.
	NOTE
		Occasionally, a temporary conductivity (leakage current between isolated
		conductors) caused by condensation can be expected (IEC 61010-1
		2nd Edition).
Electrical Operating Conditions
		To avoid electric shock, turn off the L4400 instrument and disconnect or
	WARNING
		de-energize all field wiring to the modules and the Analog Bus
		connector before removing any module or slot cover.

Transients

The Analog Buses are designed to safely withstand occasional transient overvoltages up to 1000 Vpeak. Typically, these transient overvoltages result from switching inductive loads or from nearby lightning strikes.

66 L4400 User’s Guide