Binder APT.line C 150, Руководство по эксплуатации

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C 150 (E2) 06/2011 page 39/78
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. Example 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”
flashes, 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.
The settings of the safety controller are inactive during sterilization (chap. 15.4). They become
functional again following abortion of the sterilization and/or the restart of the unit at the main
power switch.
9.2.1 Setting the safety controller set point type
Select the safety controller set point type in operating mode USER (chap. 7.3). The operating function
“
At.S
” specifies the safety controller set point type “Limit” (Lit) or “Offset” (OFS).
•
With set point type “Limit” (Lit), operating function “
AL.S
” (safety controller set point as limit value) is
displayed in operating modes HAND and USER. You can set a limit value.
•
With set point type “Offset” (OFS), operating function “
Ot.S
” (safety controller set point as offset value)
is displayed in operating modes HAND and USER. You can set an offset value.