Stirling Shuttle ULT-25, Operating Manual

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Operating Manual:
ULT
:25
-86
˚C
Ultra Low Temperature Portable Freezer
10 02.2011
To change the Set Point by •
Method B
— Press and hold the Set T button until the Set T LED glows.
– The Set Point temperature will appear with the letter S in the first seven-segment display.
— The
/ buttons can be used to change the Set Point.
– When the / buttons are first pushed the Set Point will change by 1º C. at first.
– If the / buttons are held for five seconds the step size will increase to 5º C.
– Briefly release (a half second) the / buttons while continuing to hold down
– the SET button the increment/decrement size will return to 1º C.
– Release the / buttons once the desired Set Point is achieved.
—
Press the Set T button briefly (less than one second) to turn off the Set T LED.
— The display will return to chamber temperature.
Using Preset Temperatures
The three buttons labeled 1, 2 and 3 can be used to quickly change the Set Point to frequently used values. When shipped the Presets
•
are set to -80º C, -40º C, and -20º C. They can be set to any preferred values.
To choose one of the preset temperatures: •
—
Press and hold the Set T button until the Set T LED glows
— Push one of the Preset Temperature buttons briefly
— The new set temperature will be shown in the seven-segment display
— If this is the desired Set Temperature the user can either:
– Briefly press the Set T button to turn off the Set T LED — OR
– Wait for approximately eight seconds when the freezer panel will return to normal operation
Over-Temperature Alarm
If the freezer compartment temperature is 10º C warmer or colder (adjustable, see below) •
than the set point for five seconds then it will go into temperature alarm mode.
—
The Over T light will go on (this is used for under temperature alarms as well).
—
The freezer will make a double beep every 10 seconds.
— Situations which can affect the freezer’s ability to maintain a steady state or cooling rate include:
– The lid is ajar
– The air vents are blocked
– Addition of a large relatively warm mass
– Power supply problems
– Mechanical and/or electrical problems
How to silence the audible temperature alarm
The Over T light will always be lit when the cooler temperature is over or under the set temperature by more than 10º C. •
To postpone an alarm
When the audible alarm is sounding it can be postponed •
Press the button beneath the Over T LED and the audible alarm will be turned off for 1.0h •
Typical times for recovery to -80º C after adding RT samples to -80º C chamber
•
— (
16) 15-ml centrifuge tubes | w/ centrifugate | 0.8 h
— ( 96) 2-ml cryovials | w/1.8 ml cryopreservant | 1.5 h
— ( 8) 50-ml centrifuge tubes | filled w/water | 3.5 h
— ( 2) 500-ml bottles | filled w/water | 8.0 h