Introduction; Intended Use; General Usage; Principles Of Operation - Barnstead 47900 Operation Manual

Caution
Do not exceed operating temperatures
shown in "General Specifications."
Exceeding these limits will result in
severely reduced element life.

Introduction

Intended Use

The Type F47900 and F48000 furnaces are
general purpose laboratory and heat treating
furnaces. For optimum element life,
Barnstead International recommends observ-
ing these temperature ranges: from 100°C
(212°F) to 1093°C (2000°F) continuous use
or from 1093°C (2000°F) to 1200C (2192°F)
for intermittent use. Continuous use is operat-
ing the furnace for more than 3 hours and
intermittent use is operating the furnace for
less than 3 hours.
All furnaces consist of: 1) a vented heating
chamber; 2) a temperature controller; and 3)
a door safety switch for operator safety.

General Usage

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

Principles of Operation

The furnace chamber is heated by open coil
electric resistance elements and is insulated
with ceramic fiber insulation. The controller is
located under the furnace chamber and is
well insulated from the heat generated in the
furnace chamber. A door safety switch
removes power to the heating elements
whenever the furnace door is opened. The
temperature is controlled by one of three
types of controllers.
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