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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 108/197
In case of a power failure, transmission of the alarm via zero-voltage relay outputs remains active for the
duration of the power failure. After power returns, contact 1 closes automatically with contact 3.
When using the APT-COM™ 4 Multi Management Software (option, chap. 18.1) for data
acquisition, the alarm messages are only recorded in the protocol.
Set the tolerance limits for limit alarms by APT-COM™ 4 separately in the AlarmCenter.
12. Temperature safety devices
12.1 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 the actual temperature exceeds the nominal temperature by approx. 10 °C, the over temperature
protective device permanently 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 service provider or BINDER Service.
12.2 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 functionally and electrically
independent of the temperature control system. If an error occurs, it performs a regulatory function.
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).
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 set-point. This condition (state of alarm) is indicated visually
and additionally with an audible alert if the buzzer is enabled (chap. 11.4). The alarm persists until the
chamber cools down below the configured safety controller setpoint.
Check the setting regularly and adjust it following changes of the set-point or charge.
The safety controller only activates after the set-point has been reached once.
During a running sterilization (chap. 21.3) the safety controller is non-functional
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