Description; Intended Use; General Usage; Principles Of Operation - Barnstead F46110CM Operation Manual

NOTE
The fans operate continuously, even
when the circuit breaker is OFF, to assure
that the control section and the terminals
of the heating elements are continuously
ventilated. Without ventilation, residual
heat from the furnace chamber can cause
overheating after the furnace is turned off.
CAUTION
Do not completely remove electricity from
the furnace until chamber temperature
falls below 500°C. Do not touch exposed
elements.

Description

Intended Use

Types 461 and 462 are general purpose laboratory
furnaces
intended for applications requiring temperatures from
800-1700
degrees C.

General Usage

Do not use this product for anything other than its
intended usage.

Principles of Operation

The chamber section is heated by six (in type F46100
urnaces) or eight (in type F46200 furnaces) Super
Kanthal 33 heating elements suspended in a chamber
made of alumina and silica high temperature refractory
fiber.
This high temperature refractory fiber is in the form of
blocks which line the inside of the chamber. Because of
the
stresses caused by extremely high temperature opera-
tion, these blocks will show some surface cracking. This
cracking is not detrimental to the operation of the fur-
nace.
A precious metal type B thermocouple senses the
temperature in the chamber and transmits this informa-
tion to the temperature control in millivolts.
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