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sensing parts of thermometers, and put the bottom end of gauze into
distilled water) under the blowing of wind with the speed of 2.5-3m/s.
Record the temperature of dry bulb thermometer, and calculate the relative
humidity using the <<Relative humidity referring table for environment
test>> GB6999-86.
(7) Cooling speed
Leave the freezer at test room, room temperature is 32 ℃ , the inner
temperature of freezer gets balance with room temperature (temperature
difference +-1K). Close freezer door and let the freezer running
continuously. Record the time needed for storage temperature t
m
to reach
t
m
(max) in accordance with table 13-3, cooling temperature t
m
to reach +14
℃, and the time the freezing temperature reaches the corresponding star
level. According to standard, 250L below freezer will not exceed 2h;
250L-500L freezers will not exceed 3h.
(8) Freezing ability
The freezing ability of freezer shall not be less than 90% of rated ability.
MAINTENANCE SERVICE AND TROUBLE SHOOTING
Maintenance Service and Trouble Shooting
(9) Electricity consumption
Leave the freezer at test room, climate temperatures are: SN, N, and ST
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