Performance In Case Of Failures; Performance After Power Failures; Alarm Messages; Safety Device Class 2 (Din 12880:2007) - Binder vdl 23 Operating Manual

11.

Performance in case of failures

11.1 Performance after power failures

Power failure during fixed-value operation (Normal Display):
The entered parameters remain saved. After power returns, operation continues with the set parameters.
Power failure during program operation:
After the power returns, program course continues with the set-points that have been reached previously
during program operation.

11.2 Alarm messages

Alarm messages, e g. "RANGE ERROR CH1" in case of sensor rupture, are shown in Display 2 only in
Normal Display.
A buzzer can be activated / deactivated in the user level (chap. 10). It can be reset by pressing the "EXIT"
button. The alarm text shown in Normal Display goes off only if the cause of the alarm does not exist any
longer.
12.

Safety device class 2 (DIN 12880:2007)

The temperature safety device protects the vacuum drying oven, its environment and the charging mate-
rial from exceeding the maximum permissible temperature.
Please observe the DGUV guidelines 213-850 on safe working in laboratories (formerly BGI/GUV-I 850-
0, BGR/GUV-R 120 or ZH 1/119, issued by the employers' liability insurance association) (for Germany).
The temperature safety device only activates after the set-point has been reached once.
Set the safety-device to the maximally permitted drying temperature according to the information panel
"temperature setting" (chap. 2.5), to prevent exceeding the maximum drying temperature in case of a
default. In the event of a fault in the temperature controller, the safety device (2) permanently turns off
the vacuum drying oven. This status is reported visually by the indicator lamp (2a).
Check the operation of the safety device (2) by moving it slowly counter-clockwise until it is turned off.
The safety device cut-off is reported visually by the indicator lamp (2a).
Then release the safety device by pressing the reset button (2b), and turn on the VDL vacuum drying
oven as described previously.
(2b)
(2)
VDL (E2.1) 05/2016
Figure 16: Temperature safety device class 2
(2a)
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