Yamato DF Series, Инструкция по эксплуатации

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55
INDEPENDENT OVERHEAT PREVENTION
There are two safety devices in this unit: the auto-overheating preventive function of the
controller (automatic recovery) and the independent overheating prevention (manual recovery).
Circuits and sensor that are independent from the controller configure them. These safety
devices for the temperature overheating prevention protect the instrument in a fail-safe
method.
●
Setting the Temperature Range and Function
Setting
Temperature:
0 to 399
℃
Input Method: Three integer digital switch. Turn the drum of each column and set the
desired value. The first integer can only be from 0 to 3 for hundred
columns.
Function: Heater output is cut off when the measured temperature gets higher than
the set temperature of the independent overheating prevention. The
function is active when the earth leakage breaker is ON.
When the independent overheating prevention is activated, is flashing on
the main display with the TROUBLE lamp flashes.
When the independent overheat prevention is active while the heater is in
the temperature rising process, etc., and flash alternately on the display.
●
Activation/Setting Method
①
Set the independent overheating prevention 15  C higher than the set temperature
of the main unit.
②
When setting the proper value to protect the sample, be sure it is well above room
temperature, and set it at least 15
 C higher than the maximum temperature set
value of the temperature pattern of the program.
③
When the independent overheating prevention is activated improperly by changing
the setting of the independent overheating prevention lower than the internal
temperature or by continuing operation when the setting on the unit is too low,
turn off the earth leakage breaker to reset the unit and perform the setting again.
If it is activated by another reason, see chapter of Safety Devices and Error Codes
on page 12.
●
Precautions
①
When you have set any number other than 0
～
3 to the hundredth place on the
digital switch, that digit will be invalid. Note, for example, if you set a temperature
to 450
℃
, the actual setting will be 50
℃
.
②
Set temperature can change by touching the setter when cleaning. Always confirm
that the set temperature is correct after cleaning or before operation.