Shini Group
Technology & Marketing Dept
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Shini/CSC-TM
2013-11 zh-cn Shini product repair manual.doc
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Catalog:
template:Standard_CN.dot; filename: Shini product repair manual; Printdate: 8/1/2014 1:58:00 PM; savedate: 8/1/2014 1:58:00 PM
2. Heating Pipe
2.1 Applicable Models
SHD
SDL
SHD-U
SDL-U
SD-H
SCD
SDD
2.2 Working Principle
Because of resistance, alloy resistance wire inside the heating pipe will heat after
energization. Heating is achieved by tightly compressed magnesium oxide powder
filled in the heating pipe conducts heat to the heating pipe body.
2.3 Inspection
According to the following principle, you can use a multimeter to test the resistance of
heating pipe when you check whether the heating pipe is damaged, if the tested value
is infinite or much larger than the actual resistance, heating wire in the middle of
heating pipe has been disconnected, unable to achieve heating, needs to be
replaced.
You can get the actual resistance of heating pipe according to its power, the
calculation method is:
R=U
2
/P
R：Resistance, unit is Ω.
U：Voltage of heating pipe, unit is V.
P：Power of heating pipe, unit is W.
For example, the voltage of a heating pipe is 380V, and the power of heating pipe is
12kw, we can get the actual resistance is:
380v*380v/12000w≈12Ω
2.4 Replacing
Heating pipe must be replaced with the same specifications, adaptable voltage and
power in order to achieve the original heating effect. If not, it will cause heating pipe
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