3
Ground The Instrument
This product is a Safety Class 1 instrument (provided with a protective earth terminal). To
minimize shock hazard, the instrument chassis and cover must be connected to an electrical
ground. The instrument must be connected to the ac power mains through a grounded power
cable, with the ground wire firmly connected to an electrical ground (safety ground) at the
power outlet. Note: Any interruption of the protective (grounding) conductor or disconnection of
the protective earth terminal will cause a potential shock hazard that could result in personal
injury.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of fumes or flammable gases.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove instrument covers except as instructed in this Guide for
installing or removing electronic load modules. Component replacement and internal
adjustments must be made only by qualified service personnel. Do not replace components
with power cable connected. Under certain conditions dangerous voltages may exist even with
the power cable removed. To avoid injuries always disconnect power, discharge circuits, and
remove external voltage sources before touching components.
DO NOT SERVICE OR ADJUST ALONE
Do not try to do some internal service or adjustment unless another person capable of
rendering first aid resuscitation is present.
Safety Symbols
Direct current
Alternating current
Both direct and alternating current
Protective earth (ground) terminal
Caution (refer to accompanying documents)
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