Yamato Scientific DG400 Drying Ovens for Laboratory Tools - Manual (Page 17)

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4. Operating procedures
Operating procedures (settings for overheat prevention device)
As a safety measure for preventing overheat, a hydraulic overheat prevention device (manual return)
is installed.
Temperature setting range and functions
The temperature setting range for the standalone overheat prevention device is “50℃～120℃.”
When the temperature in the bath keeps rising beyond the controller set temperature and reaches
the set temperature of the overheat prevention device, controller power is shut off. (Controller
display will be eliminated)
When the overheat prevention device is activated, it will not be released until the ELB is turned on.
Change temperature setting to the correct value (set temperature +20℃), turn the ELB OFF once
and then turn it ON again.
How to set temperature
Set the temperature scale
to the arrow
Setting the overheat prevention temperature
・
Set the temperature scale on the hydraulic overheat
prevention device installed on the upper right side of the
unit to the arrow in the diagram shown left.
・ Turn the ELB to “OFF” and wait for a while without opening
the door.
・ After a while, turn the ELB ON (set the ELB “ON”.)
Caution
① Set temperature as “set temperature +20℃” as a rough standard and add 5℃ to the setting if
the device functions improperly.
② The temperature setting range for the standalone overheat prevention device is “50℃～
120℃.” Be sure to set the overheat prevention activation temperature correctly otherwise the
device may not start, the overheat prevention device is activated before temperature in the
bath increases completely, or a fire or other unexpected accidents may result.
The temperature is set at 120℃ on shipping from the factory.
③ If the temperature for the standalone overheat prevention device is set at around or below the
room temperature, the device may be triggered when the door is opened.
④ The overheat prevention device has been designed to prevent overheating of devices not to
protect samples. The device does not prevent accidents caused from use of explosive or
flammable substances.