BD-S / BD-S-UL, ED-S / ED-S-UL, FD-S / FD-S-UL (E1) 03/2022 page 23/60
9. Overtemperature protection
9.1 Overtemperature protective device (class 1)
The chambers are equipped with an internal temperature safety device, class 1 acc. to DIN 12880:2007. It
serves to protect the unit and prevents dangerous conditions caused by major defects.
If the cut-off temperature is reached, the over temperature protective device permanently turns off the unit.
The user cannot restart the device again. The protective cut-off device is located internally. Only a service
specialist can replace it. Therefore, please contact an authorized service provider or BINDER service.
Cut-off temperature values:
BD-S / BD-S-UL: 90 °C / 194 °F
ED-S / ED-S-UL, FD-S / FD-S-UL: 318 °C / 604.4 °F
9.2 Safety controller
The chambers are regularly equipped with an adjustable electronic safety controller. It serves to protect the
chamber, its environment and the contents against exceeding the maximum permissible temperature.
Please observe the regulations applicable to your country (for Germany: DGUV guidelines 213-850 on safe
working in laboratories, issued by the employers’ liability insurance association).
Depending on the chamber type the safety controller acts as an over temperature safety device class 2
(“temperature limiter”) or class 3.1 (“temperature protection”) acc. to DIN 12880:2007.
• BD-S / BD-S-UL: Safety controller class 3.1
The safety controller class 3.1 limits the temperature inside the chamber to the entered safety controller
set-point. In the event of a fault (if this maximum temperature is exceeded), it takes over the control to
this value. This status is reported visually by an alarm message.
The safety controller keeps control of the chamber until the chamber temperature cools down below the
safety controller set-point value.
• ED-S / ED-S-UL, FD-S / FD-S-UL: Safety controller class 2
The safety controller class 2 limits the temperature inside the chamber to the entered safety controller
set-point. In the event of a fault (if this maximum temperature is exceeded) the safety controller com-
pletely turns off the heating until manual reset. This status is reported visually by an alarm message.
Function check:
Check the safety controller at appropriate intervals for its functionality. It is recommended that the author-
ized operating personnel should perform such a check, e.g., before starting a longer work procedure.
9.2.1 Setting the safety controller
A limit temperature is entered as the safety controller set-point , i.e. the absolute maximum permitted
temperature value.
BD-S / BD-S-UL: Setting with an accuracy of a tenth of a degree. 0 °C / 31 °F up to 80 °C / 176 °F
ED-S / ED-S-UL, FD-S / FD-S-UL: Setting with an accuracy one degree. 0 °C / 31 °F up to 260 °C / 500 °F
Regularly check the safety controller setting relating to the entered temperature set-point
Set the safety controller set-point by approx. 2 °C to 5 °C above the desired temperature set-
point.
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