16 Installation Guide
E440xBU Option H70 Safety and Regulatory Information
General Safety Considerations
Safety Earth Ground
WARNING This is a Safety Class I product (provided with a protective earthing ground
incorporated in the power cord). The mains plug shall only be inserted in a
socket outlet provided with a protective earth contact. Any interruption of
the protective conductor, inside or outside of the instrument, will make the
instrument dangerous. Intentional interruption is prohibited.
Before Applying Power
Verify that the product is configured to match the available main power source. If this
product is to be powered by autotransformer, make sure the common terminal is connected
to the neutral (grounded) side of the ac power supply.
Cautions applicable to this instrument.
CAUTION Always use the three-prong ac power cord supplied with this instrument.
Failure to ensure adequate earth grounding (by not using this cord) can cause
instrument damage.
CAUTION This product is designed for use in Installation Category II and Pollution
Degree 2 per IEC 61010 Second Edition and 664 respectively.
CAUTION This instrument has autoranging line voltage input; be sure the supply
voltage is within the specified range.
CAUTION Ventilation Requirements: When installing the instrument in a cabinet, the
convection into and out of the instrument must not be restricted. The ambient
temperature (outside the cabinet) must be less than the maximum operating
temperature of the instrument by 4 °C for every 100 watts dissipated in the
cabinet. If the total power dissipated in the cabinet is greater than 800 watts,
forced convection must be used.
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