Agilent Technologies L4400 - Manual (Page 78)

66 L4400 User’s Guide
3 Operating 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.
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.
Occasionally, a temporary conductivity (leakage current between
isolated conductors) caused by condensation can be expected (IEC
61010-1

2nd Edition).
Electrical Operating Conditions
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.

N O T E
N O T E
WA R N I N G
To avoid electric shock, turn off the L4400 instrument and
disconnect or de-energize all field wiring to the modules and the
Analog Bus connector before removing any module or slot cover.