Binder 9020-0423, Руководство по эксплуатации

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KB ECO / KB ECO-UL (E6.2) 12/2021 Page 36/85
11. Temperature safety devices
11.1 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. 90 °C /
194 °F
is reached, 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.
11.2 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). If an error occurs, the safety controller 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 value. This condition (state of alarm) is indicated visually and
additionally with an audible alert if the buzzer is enabled (chap. 14.2). 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 controller 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.
Example:
Desired temperature value: 40 °C, desired safety controller value: 45 °C.
Possible settings for this example:
Temperature set point Safety controller mode Safety controller value
40 °C
Limit Limit value 45 °C
Offset Offset value 5 °C