老化箱的换气量
UL标准规定是多少？UL 2556 規定如下:
i) a forced air-circulating oven. The apparatus for the air-oven aging of specimens shall be as
indicated in NMX-J-417-ANCE or ASTM D 5423 (Type II ovens) and ASTM D 5374 and shall
circulate the air within the aging chamber at high velocity. Fresh air is to be admitted,
continuously, to the chamber to maintain normal oxygen content in the air surrounding the
specimens. The exhaust ports of the oven shall be adjusted to achieve 100 to 200 complete
fresh-air changes per hour. For purposes of calculating the number of fresh air changes the
volume of the oven shall be based on the interior dimensions of the oven. The blower, fan, or
other means for circulating the air shall be located entirely outside the aging chamber. The oven
shall be capable of maintaining the temperature specified in Table 3;
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