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UL 474 Standard for Dehumidifiers Updated

Dehumidifier photo

UL has released a new edition of UL 474, the standard for dehumidifiers. The 10th edition was issued to editorially remove a statement from thetransmittal page. No changes were made to the body of the standard.The new edition can be purchased on the UL website.

Description*

- Partner Content -

Near and Far Field Measurements with a Vector Network Analyzer

For optimal performance in over-the-air RF systems, antennas must meet specific requirements. Performance parameters like size, wind-loading, environmental ruggedness, transmission pattern, bandwidth, and power handling capability should be considered. Methods of measuring the transmission (or reception) pattern that determines antenna gain with a VNA will be examined in this article.

“These requirements cover movable, household, self-contained dehumidifiers employing hermetic refrigerant motor-compressors and intended for connection to single-phase, alternating-current (ac) circuits rated not more than 20 amperes, 125 volts or 15 amperes, 208 or 230 volts. The requirements also cover dehumidifiers which incorporate electric air heaters.”

*Description from the UL website.

Photo by jcasimir

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