BINDER KBF LQC 240 - Manual (Page 62)

KBF LQC (E5.3) 07/2014 page 62/114
11. Temperature safety devices
11.1 Over temperature protective device (class 1)
The constant climate chamber KBF LQC is equipped with an internal temperature safety device, class 1
acc. to DIN 12880. It serves to protect the unit and prevents dangerous conditions caused by major de-
fects.
If a temperature of approx. 110 °C / 230°F is reached, the over temperature protective device permanent-
ly turns off the unit. The user cannot restart the device again. The protective cut-off device is located in-
ternally. Only a service specialist can replace it. Therefore, please contact an authorized service provider
or BINDER Service.
11.2 Safety controller (temperature safety device class 3.1)
The constant climate chamber is equipped with an over temperature safety device class 3.1 acc. to DIN
12880. It is designated as the “safety controller”. This second, electrically independent temperature con-
troller takes over at a selectable set point in case of fault. It serves to protect the charging material
against extremely high temperatures.
With option safety device class 3.3 (chap. 11.3) the safety controller is not used.
In this case, do NOT change the pre-set value of at least 80 °C / 176°F.
The message “TEMPERATURE LIMIT” on the controller display indicates safety controller activity. The
safety controller controls the constant climate chamber to the entered safety controller set-point until the
temperature inside the chamber returns below this temperature and until you then reset the alarm mes-
sage by button RESET.
Regularly check the safety controller setting for set-point type “Limit” or “Offset”
•
in Manual Mode according to the entered set-point temperature value
• in Program Mode according to the highest temperature value of the selected temperature
program
Set the safety controller set-point by approx. 2 °C to 5 °C above the desired temperature set-
point.
11.2.1 Safety controller set-point types
Limit Absolute maximum permitted temperature value.
Example:
Temperature set-point 40 °C / 104 °F
Limit value (safety controller set-point) set to 42 °C.
Offset Maximum over temperature above the active temperature set point. The maximum tem-
perature changes internally and automatically with every set-point change it.
Example:
Temperature set-point 40 °C / 104 °F
Offset value (safety controller set-point) set to 2 °C.
Do NOT change the temperature unit from °C to °F.