|
18.102 The electrical connections between the resistance material and electrodes of! Q8 D# \( I/ ^- ?" P
flexible sheet heating elements shall be reliable.9 {9 {: m0 w8 ?( ]5 F- r& P0 G
Compliance is checked by tests that are carried out on two heating units, each having a
, X8 _& O& Q" \# jlength exceeding 1 m.& u; p- c& |: R: U/ T, L& V' ~
One heating unit is subjected to the test of 18.102.2 after which it is subjected to the test of
. x" b, w5 O; v18.102.5. The other heating unit is subjected to the tests of 18.102.1 to 18.102.5.# ~1 I- ]2 C4 I$ u
After the tests, the voltage drop of the second heating unit, determined at the location where
# {$ c" R& v) m7 O4 [) x" A nbending is applied during the tests of 18.102.2, shall not exceed 1,5 times the voltage drop
) Z$ A' Q' i) _that was determined on the first heating unit. In addition, the average voltage drop) U+ `7 g6 }+ ^% Q/ \9 g
determined at the other locations of the second heating unit, shall not exceed 1,5 times the, z/ b5 e& K* D- w9 @2 N# x5 x
average voltage drop of the first heating unit.# k# Y/ _( ]2 n
Inspection shall show no contact degradation such as pitting under the electrodes or damage! Q* `% i9 X4 x6 ^8 z
adjacent to the electrodes.
" o2 g. B D9 F: a. r/ e& Q: L5 D6 q" `8 B$ ^+ V
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? |
|