Option (Overheat Preventive Unit) - Yamato DKG610 Instruction Manual

The stand-alone overheat preventive unit consists of a temperature measurement circuit, CPU,
sensors, and the output circuit separate from the controller. When the preventive unit is activated,
"Er03" is occurred and the unit will stop and will not recover until the earth leakage breaker is turned
on again. (Manual recovery)
Temperature setting for the stand-alone
overheat preventive unit
About the stand-alone overheat preventive unit
When the difference in the set temperatures between the stand-alone overheat preventive
unit and the controller is small, the preventive unit may be activated and operation may be
stopped. Set a temperature for the independent overheat preventive unit at a temperature
at least 30℃ higher than that for the controller or to the set temperature for the controller
overheat preventive unit or higher. Note that the overheat preventive unit is not available
for the purpose of protecting specimens.
The temperature is set at 290℃ at the time of shipping.
If you want to operate the stand-alone overheat preventive unit at a temperature you want,
first operate the unit with the temperature in the bath at that setting until operation becomes
stable, then gradually lower the preventive unit setting and make sure that it operates
reliably at the temperature setting you want. It takes about five seconds before it starts
operation for which time you have to wait before checking. When the preventive unit is
triggered, it displays Er03 and operation stops. Since the activation temperature for the
sensor of the preventive unit differs depending on overshoot at the time of heating or
specimen status, set it at as high temperature as possible.
Also, when the preventive unit set temperature has been changed, wait for about five
seconds until that temperature is recorded before turning power off.
4. Operating procedures
① Set the temperature with the ▼▲ keys.
（Set temperature range：0～400℃）
℃
290
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Option (Overheat preventive unit)