Global Cooling ULT25, Руководство пользователя

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© Global Cooling, 2009 10/29/2009
Version 1.2u
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To postpone an Alarm
When the audible alarm is sounding it can be postponed
Press and hold the button beneath the Over T LED until a time is displayed… it will
look like ###h which represents a decimal fraction of an hour -- 1.0 h is the default.
The audible alarm will be turned off for the amount of time shown
If you wish to change the amount of time before the audible alarm is armed again,
o
Continue to press and hold button 3 under the Over T LED
o
While holding button 3, push the / buttons to change the delay by 0.1 h
increments. If the button is held for approximately 5 seconds the time will
begin to change by 1.0 h increments.
Typical times for recovery to -80º C after adding RT samples to -80º C chamber
o
16 15-ml centrifuge tubes w. centrifugate 0.8 h
o
96 2 ml cryovials w. 1.8 ml cryopreservant 1.5 h
o
8 50-ml centrifuge tubes filled w water 3.5 h
o
2 freezer bottles w 500-ml water 8.0 h
How to change the Over (Under) Temperature Allowance
The Over T LED is lit whenever the chamber temperature is either higher or lower
than the set point by an “allowance” (
T alarm = T set +/- T allowance
). The factory default
is 10º C. For Example - if the Set Point is -60º and the default allowance is used, then
the
Over T alarm occurs at T>-50º or T<-70º. This allowance can be changed from 1º
C to 50º C.
o
Small values ensure tight temperature control during long storage.
o
Large values can be used to reduce the number of Over Temperature alarms
when the freezer is being open and closed frequently.
This can only be changed when the Over T LED is glowing.
o
To view the allowance
Press both buttons 2 and 3 briefly to see the current allowance setting.
•
It will be display with the letter A , such as A 10 .
o
To change the allowance
Press and hold both buttons
2
and
3
and then /
The allowance value will change by 1 degree increments
o
To dismiss the allowance display
Either press and hold both buttons 2 and 3 briefly, OR
The display times-out after approximately 8 seconds.
To Silence the Temperature Alarm
Press the button beneath the Over T indicator light until the display shows 1.0 h , then
use the down button to set the time to any negative time (e.g. -0.1 h ). This will turn
OFF the audible alarm.
The Over T indicator LED will always glow whenever the chamber T is out of range.
You can turn the silenced alarm back on by either
o
Resetting the postpone time to a positive number
o
Turning the freezer OFF and ON