BINDER C 150 - Manual (Page 44)

C 150 (E2) 12/2012 page 44/90
Note when setting high gas concentrations
Carbon dioxide (CO
2
) in high concentrations is hazardous to health. It is colorless and almost odorless
and therefore practically imperceptible. Any CO
2
gas that may escape must be safely led out via good
room ventilation or a suitable connection to an exhaust system. We recommend installing a CO
2
warning
system.
WARNING
High concentration of CO
2
(> 4 Vol.-%).
Danger of death by suffocation.
Danger of poisoning.
Do NOT set up units in non-ventilated recesses.
 Ensure technical ventilation measures.
 Observe the relevant regulations for handling CO
2
.
If CO
2
is released, leave the area und inform the security service or fire department.
9. Temperature safety devices
9.1 Over temperature protective device (class 1)
The CO
2
incubator is equipped with two internal temperature safety devices class 1 acc. to DIN 12880.
They serve to protect the unit and prevent dangerous conditions caused by major defects.
If one of the over temperature protective devices permanently turns off the unit, the user cannot restart
the device again. The protective cut-off devices are located internally. Only a service specialist can re-
place them. Therefore, please contact an authorized service provider or BINDER Service.
9.2 Safety controller (temperature safety device class 3.1)
The incubator is equipped with an over temperature safety device class 3.1 acc. to DIN 12880. It is des-
ignated as the “safety controller”. This second, electrically independent temperature controller takes over
at a selectable set point in case of a faulty condition. It serves to protect the charging material against
extremely high temperatures.
In addition to the temperature set-point (main controller set-point), you can enter an independent safety
controller set-point. E
xample with setting “Limit”: set-point = 37 °C, safety controller set-point = 39 °C.
During proper operation, the controller controls temperature to the temperature set-point (37 °C). In the
event of a defect, which causes temperature to rise above the safety controller set-point of 39 °C, the
safety controller takes over and acts independently, limiting the temperature to 39 °C.
The message “otc” on the controller display indicates safety controller activity. The LED “ALARM” flash-
es, the LED “ ” is lit. At the same time there is an additional audible alert (buzzer). Pressing the “EXIT”
button turns off the audible alarm. When the temperature falls below the safety controller set-point (39
°C), the safety controller hands over to the main controller. Then the alarm message “otc” and the LEDs
“ALARM” and “ ” go off.
Regularly check the safety controller setting for set point type “Limit” or “Offset”.
Set the safety controller set point by approx. 2 °C above the desired temperature set point.
Safety controller set point types:
Limit Absolute maximum permitted temperature value
Example: temperature set point 37 °C / 98.6°F, safety controller set point 39 °C / 102.2°F
Offset Maximum over temperature above any active temperature set point (e.g., 2 °C). The maxi-
mum temperature changes internally and automatically with every set point change.
Factory setting: set point type “Offset” with safety controller set point 2 °C.