BINDER MK 115 - Manual (Page 71)

MKF + MKFT (E3.1) 07/2014 page 71/114
12. Temperature safety devices
12.1 Over temperature protective device (class 1)
The alternating climate chamber 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 defects.
If the actual temperature exceeds the nominal temperature by approx. 20 °C, the over temperature pro-
tective 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 au-
thorized service provider or BINDER service.
12.2 Safety controller (over-temperature safety device class 2 DIN 12880)
The alternating climate chamber is equipped with an over temperature safety device class 2 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 the option over-/under temperature safety device class 2 (chap. 12.3), the safety control-
ler must be set to maximum temperature.
The message “TEMPERATURE LIMIT” on the controller display indicates safety controller activity. The
safety controller controls the alternating 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. 10 °C above the highest temperature set-point.
Safety controller set-point types:
Limit Absolute maximum permitted temperature value.
Example:
Temperature set-point 100 °C/ 212 °F
Limit value (safety controller set-point) set to 110 °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 100 °C / 212 °F
Offset value (safety controller set-point) set to 10 °C.
Do NOT change the temperature unit from °C to °F.