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“” or “△▽”. After finishing the setting, if no key is pressed in 5s, the temperature value stops flashing,
indicating that the value has been stored in the computer, otherwise the setting is invalid. The range of
temperature setting is -126 ~ -150
℃.
In case of ambient temperature above 30
℃ (excluding 30℃), if the temperature setting is below -140℃,
please adjust the internal temperature setting to -140
℃; in case of ambient temperature below 28℃
(including 28
℃), please adjust the internal temperature setting to original set value.
2.3 “High-temperature alarm setting”: press the “Function selection” key continuously until the
“High-temperature alarm setting” indicator light is “on”, at which time the display screen will indicate
temperature setting and the digits flash, and then change temperature setting by pressing “ ” or “ ” to
△▽
increase or decrease the value, specifically speaking, the value will increase or decrease by 1 if press
“” or “
△▽” intermittently, while the value will increase or decrease rapidly and continuously by 1 if
press and hold “ ” or “
△▽”. Once internal temperature is above high-temperature alarm setting, the
alarm of SLT freezer sounds and the “High-temperature alarm” indicator light is on. The
high-temperature alarm setting must not be above maximum temperature limit and ＋5
℃ lower than
temperature setting.
2.4 “Low-temperature alarm setting”: press the “Function selection” key continuously until the
“Low-temperature alarm setting” indicator light is “on”, at which time the display screen will indicate
temperature setting and the digits flash, and then change temperature setting by pressing “ ” or “ ” to
△▽
increase or decrease the value, specifically speaking, the value will increase or decrease by 1 if press
“” or “
△▽” intermittently, while the value will increase or decrease rapidly and continuously by 1 if
press and hold “ ” or “
△▽”. Once internal temperature is below low-temperature alarm setting, the
alarm of SLT freezer sounds and the “Low-temperature alarm” indicator light is on. The low-temperature
alarm setting must not be below minimum temperature limit and -5
℃ higher than temperature setting,
otherwise the setting can not be performed.
2.5 After finishing all the settings, if no operation is made in 5 minutes, the control board will be locked
automatically, and these settings are valid.
2.6 If any alarm condition occurs, all audible alarms will sound in such a way that it sounds for 15
seconds and then pause for 1 minute until the condition is cleared.
2.7 The setting of operating temperature should be as follows: first set the temperature at -126 , ℃ and 24
hours later, change to -135 ,
℃ and 7 hours later, change to required temperature, e.g. -140 .℃ When the
freezer works normally in successive 3 days at temperature setting value, the 1
st
batch of samples may be
loaded, but the volume of samples must not exceed 1/5 of the freezer’s effective capacity.