Binder KBF-S 240, Operating Manual

Page: 35 / 89

KBF-S (E6) 08/2018 page 35/88
With the Back button you can go back to the “ Chamber ” submenu and, repeatedly pressing it, to Nor-
mal display .
Keep the password well in mind. There is no access to the corresponding menu functions
without the correct password.
10. Temperature safety devices
10.1 Over temperature protective device (class 1)
The chamber is equipped with an internal temperature safety device, class 1 acc. to DIN 12880:2007. It
serves to protect the chamber and prevents dangerous conditions caused by major defects.
If a temperature of approx. 110 °C / 230 °F is reached, the over temperature protective device perma-
nently turns off the chamber. 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 ser-
vice provider or BINDER Service.
10.2 Overtemperature safety controller class 3.1
The chambers are regularly equipped with an electronic overtemperature safety controller (temperature
safety device class 3.1 according to DIN 12880:2007). The safety controller is independent of the tem-
perature control system. If an error occurs, it performs a regulatory function.
Please observe the DGUV guidelines 213-850 on safe working in laboratories (formerly BGI/GUV-I 850-
0, BGR/GUV-R 120 or ZH 1/119, issued by the employers’ liability insurance association) (for Germany).
The overtemperature safety controller serves to protect the chamber, its environment and the contents
from exceeding the maximum permissible temperature. In the case of an error, it limits the temperature
inside the chamber to the entered safety controller value. This condition (state of alarm) is indicated visu-
ally and additionally with an audible alert if the buzzer is enabled (chap. 13.2). The alarm persists until the
chamber cools down below the configured safety controller value and the alarm is reset on the controller.
Check the setting regularly and adjust it following changes of the temperature set-point or
charge.
The safety controller only activates after the set-point has been reached once.
You can set the safety controller mode to “Limit” or “Offset”.
•
Limit: Limit value, absolute maximum permitted temperature value
This setting offers high safety as a defined temperature limit will not be exceeded. It is important to
adapt the safety controller value after each modification of the temperature set-point. Otherwise, the
limit could be too high to ensure efficient protection, or, in the opposite case, it could prevent the con-
troller from reaching an entered set-point outside the limit range.
•
Offset: Offset value, maximum overtemperature above any active temperature set point. The resulting
maximum temperature changes internally and automatically with every temperature set-point change.