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18.102 The electrical connections between the resistance material and electrodes of8 r! ]' P+ _; U+ s3 _! ^
flexible sheet heating elements shall be reliable.$ p: T# p$ g/ j* A# Z5 L/ c
Compliance is checked by tests that are carried out on two heating units, each having a/ X$ n2 G. V: R
length exceeding 1 m.: x( p- s9 d: d. D
One heating unit is subjected to the test of 18.102.2 after which it is subjected to the test of; q; \4 A, }' i( M; T; K7 h( h J- ~3 Y+ F
18.102.5. The other heating unit is subjected to the tests of 18.102.1 to 18.102.5.$ ~8 T @- j# Y! u2 a
After the tests, the voltage drop of the second heating unit, determined at the location where
" O' h7 U/ ^. n% k/ `1 Vbending is applied during the tests of 18.102.2, shall not exceed 1,5 times the voltage drop
8 V. ~5 n& ~! \: o$ [& f2 v. Zthat was determined on the first heating unit. In addition, the average voltage drop# r4 [ r. P& p+ G z
determined at the other locations of the second heating unit, shall not exceed 1,5 times the7 A4 i4 r5 c8 R( S
average voltage drop of the first heating unit.
9 E1 v% R# X& x" zInspection shall show no contact degradation such as pitting under the electrodes or damage" c& z% a) u% m p$ O
adjacent to the electrodes.& Q2 g. V5 _" u3 H0 N" u+ O( ?: n
2 y6 F E& J4 [5 @% \1)电压降: 怎么判定是两个样板电压降作比较?电压降怎么测试?按18.101 测试吗? |
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