Table - Heraeus 6000 Serie Instrucciones De Uso

6. Appendix - Table 3, from DIN-Standard 12 880
Safety devices against malfunction of the temperature control circuit.
Classification of heating ovens according to DIN-Standard 12 880 Part 1, table 3.
The class describes the type and scope of protection, as well as the safety measures
required to deal with a simple defect in the temperature control circuit.
Class
0
1
2
3
3.1
3.2
3.3
Purpose
-
Protection
of oven
Protection
of oven,
environment
and mate-
rial being
treated.
Scope
-
In the event of a
defect, no danger
emanates from the
oven.
In the event of a
defect, no danger
emanates from the
oven or from the ma-
terial being treated.
In the event of a
defect, the material
being treated 1s pro-
tected against over-
heating and/or under-
cooling (e.g. Incuba-
tor)
Safety device
ace. to Sub-
section 5.5
-
Temperature
limiter or
thermal fuse
Adjustable
temperature
limit cut-out
Adjustable
temperature
limit control-
ler, coming
into action
in case of:
excess
temperature
insufficient
temperature
excess
temperature
and
insufficent
temperature
Safety measures
Only attended opera-
tion*) with harmless
materials is permit-
ted; or overheating
is excluded by con-
structional measures
Special safety meas-
ures depending on
the Intended use.
*) If operation is supervised, the unit must be checked at reasonably short
intervals to make sure it works correctly.
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