BINDER MK 53 - Manual (Page 45)

MK (E2.1) 10/2014 page 45/73
Depending on size, material, and shape of the charging material and on the heating-up rate, condensation
may form despite the activated bedew protection. This condensation is, however, reduced compared to
the state without bedew protection.
11. Temperature safety devices
11.1 Over-temperature protective device (class 1)
The alternating climate chamber MK is equipped with an internal temperature safety device class 1 ac-
cording to DIN 12880. It serves to protect the unit and prevents dangerous conditions caused by major
defect.
If the actual temperature exceeds the nominal temperature by approx. 20 °C, the over temperature protec-
tive device permanently turns off the unit. The user cannot restart the device again. This protective cut-off
device is located internally. Only a service specialist can replace it. Therefore, please contact an author-
ized service provider or BINDER service.
11.2 Safety controller (over-temperature safety device class 2)
The alternating climate chamber MK 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
controller takes over control at a selectable set point in case of a faulty condition. It serves to protect the
charging material against extremely high temperatures.
With the option over-/under temperature safety device (chap. 11.3), the safety controller 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 temperature value of the safety device by approx. 5 °C to 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 temper-
ature 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.