Yamato Scientific IQ821 Low Temperature Incubators - Manual (Page 12)

8
Before Using this unit
Defrost in Refrigerator
Much frost on the evaporator degrades the refrigeration capability, which may cause
uncontrollability of setting temperature. In the IQ821, the condition of frost on the evaporator
can be checked through the frost inspection window inside furnace. The frosting speed varies
depending on the following conditions.
1) Temperature used･･････････････Easily frosted when using the unit in low temperature
2) External temperature/humidity･･･Easily frosted when external temperature/humidity is higher
3) Sample in furnace･･････････････Easily frosted when sample contains much water
The following operations can be set to take measure against frosting in the IQ821. Set either of
them depending on the situation. The fixed temperature and program operation are available
there by pressing the DEFROST key on the defrost control panel, in addition to the program
operation.
① Manual defrost operation (manual start/automatic stop):
Perform the defrost operation if much frost is in the evaporator. The operation is started manually
and stopped automatically with the built-in timer after 5-minute operation.
→Refer to the page 11 for the operating instructions.
② Cycle defrost operation (Automatic start/stop):
In the case of operating the unit for a long term, it is available to set the cycle defrost operation.
Both approx. 5-minute operation and 23-hour-and-55-minute stop are repeated automatically.
→Refer to the page 11 for the operating instructions.
CAUTION!
• The temperature in furnace increases about 3℃ at the defrost operation. Be careful if it affects
the samples. The indicated temperature may increase more than 10℃ at that time. (The
increasing temperature is depending on the setting temperature, sample, and air temperature.)
Compensation Operation for Power Failure
• In the case of occurring the power failure during operation, the unit restarts the operation from just
the status that the power is turned OFF.
• The unit memorizes the remaining timing every one minute after starting the operation.