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Visual integrity
of heating
elements
In the K2 Prime, heating elements build a surface oxide layer over the metallic
coil, which protects it from degradation and lengthens its lifespan. However, this
oxide is extremely sensitive to molten flux.
It is extremely important that no flux ever touch the element. Element life would
dramatically be reduced.This is why elements are protected by a clear tube.
Always remove the crucibles from the instrument to weigh components, and
make sure that crucible external walls are clean before re-installing the crucibles
in their holder.
1. Flux spills on elements
2. Wire diameter
If an element is found faulty, it should be replaced immediately to prevent any
failure of the instrument during a production peak. Elements can be replaced in
pairs or all at once, according to the situation and the user's preference.
Element
terminal
connections
1. To check the integrity of the element ceramic connectors and terminals, do
56
IMPORTANT: Always disconnect the instrument from the power outlet when
working with panels removed. 240 Volts inside! Risk of electrocution!
1.1
Visually verify that no flux is found on or near the elements.
1.2
If necessary, the clear tube can be replaced independently from the
whole element assembly.
2.1
Visually verify that diameter of wire is always the same for all elements.
If a section of a heating element exhibits reduced diameter, replace this
element immediately.
IMPORTANT: Always disconnect the instrument from the power outlet when
working with panels removed. 240 Volts inside! Risk of electrocution!
the following:
1.1
Unplug instrument (240 volts – risk of death by electrocution) and let
the furnace cool down completely.
1.2
Remove the element connection access door (refer to page 77, Heating
element replacement for details on this step).
1.3
Visually inspect and verify that terminals of all four (4) ceramic
connectors are not overly oxidized. If a faulty connector is found, replace
this ceramic connector immediately.
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