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Be careful when operating the Reference 600+ in an enclosed space (such as an enclosed relay rack or
NEMA enclosure). The temperature within the enclosure must not exceed 45°C. You may need to provide
ventilation holes or even forced-air cooling for the enclosed space if excessive temperature rise occurs.
Defects and Abnormal Stresses
Treat your Reference 600+ as potentially hazardous if any of the following is true of the unit:
• It shows visible damage,
• It does not operate properly,
• It has been stored for a long period of time under unfavorable conditions,
• It has been dropped or subjected to severe transport stress,
• It has been subjected to environmental stress (corrosive atmosphere, fire, etc.).
Do not use your Reference 600+ or any other apparatus if you think it could be hazardous. Have it
checked by qualified service personnel.
Environmental Limits
There are environmental-limit conditions on the storage, shipping and operation of this equipment. The
Reference 600+ has not been designed for outdoor use.
Caution: Do not block the airflow into or out of the Reference 600+ chassis. While the
circuitry should suffer no damage caused by excessive heat, the Reference 600+ enclosure may
become uncomfortably hot to the touch if insufficient air flows through the chassis. Running the
Reference 600+ without adequate cooling could shorten the time to failure of some of the circuitry.
Warning: The Reference 600+ is not designed for operation in conditions where liquid
water may enter the chassis, or water vapor may condense within the chassis. Operation of a Reference
600+ that has water within the chassis can create a safety hazard, which could result in personal injury
or death.
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