Global Cooling ULT25 User Manual

Global Cooling

F P S C

Free Piston Stirling Cooler

ULT25 -80º C Portable Freezer

User Manual

INTRODUCTION

The ULT25 (Ultra Low Temperature, 25 liter volume) incorporates next generation Free-Piston Stirling Cooler (FPSC) technology.

FPSCs differ from conventional compressor based refrigeration in that they provide high efficiency, deep-temperature cooling in a lightweight package allowing true portable operation.

TABLE OF CONTENTS

INTRODUCTION ..................................................................................................................... 2

TABLE OF CONTENTS.......................................................................................................... 2

SAFETY PRECAUTIONS ....................................................................................................... 3

UNPACKING AND SET-UP ................................................................................................... 4

FEATURES................................................................................................................................ 5

Freezer..................................................................................................................................... 5

Control panel ........................................................................................................................... 6

OPERATION QUICK GUIDE ................................................................................................ 7

OPERATION............................................................................................................................. 8

General Operating Principles .................................................................................................. 8

How to Turn the Freezer On/Off............................................................................................. 8

Changing the set temperature .................................................................................................. 8

To see the current set temperature................................................................................................... 8

Change the Set Point to a new value ............................................................................................... 8

Using Preset Temperatures.............................................................................................................. 9

Changing the preset values.................................................................................................... 10

Min and Max Temperature.................................................................................................... 10

Over Temperature Alarm ...................................................................................................... 10

How to silence the audible Temperature Alarm ............................................................................ 10

To postpone an Alarm.................................................................................................................... 11

How to change the Over (Under) Temperature Allowance ........................................................... 11

To Silence the Temperature Alarm ................................................................................................ 11

Error conditions..................................................................................................................... 12

Locking the Panel.................................................................................................................. 12

To Lock the freezer panel............................................................................................................... 12

To Unlock the freezer panel........................................................................................................... 12

How to switch between power supplies ................................................................................ 12

Error Codes ........................................................................................................................... 13

MAINTENANCE .................................................................................................................... 14

Air Intake Filter ..................................................................................................................... 14

Storage................................................................................................................................... 14

Cleaning ................................................................................................................................ 14

TROUBLESHOOTING.......................................................................................................... 15

SPECIFICATIONS ................................................................................................................. 16

WARRANTY........................................................................................................................... 17

SAFETY PRECAUTIONS

To prevent personal injury, injury to others, or damage to property, read these safety precautions carefully before use.

• Do not disassemble, modify or repair. There are no user serviceable parts inside the

covers.

• Do not immerse in water or pour water on the unit.

• Do not put ice or liquid water directly in the freezer box, always use suitable containers.

• Do not use glass containers when the contents might freeze and break.

• Do not store flammable items such as gasoline, thinner, or solvents in the freezer. The

freezer is NOT rated as an explosion proof freezer.

• Do not remove any frost or ice which has accumulated on the inside of the freezer using

hard and/or sharp objects, such as knives, screwdrivers, etc. The inside panels are heat exchangers and can be damaged.

• Do not cut, change or modify the power cable.

• When removing the plug, hold onto the plug and not the cord.

• Do not block the air intake or air discharge vents.

• Do not drop, throw, or abuse the freezer.

• Do not operate under extreme environmental conditions, such as in a car trunk, in very

high humidity environments, in rain or other severe weather.

• Do not use solvents to clean the panel or the outside or inside of the freezer.

• An Ultra Low Temperature Freezer is qualitatively different than a home freezer. At -80º

C frostbite can occur in seconds

• . You should establish and follow a protocol for safe ULT operating procedures. This

should include (but not limited to):

 Never handle samples or freezer accessories with bare hands.  Do not use gloves which become brittle at ultra low temperatures

 Nitrile and latex gloves are inadequate

 Liquid permeable gloves are dangerous because ULT liquids can be held against the skin

and increase the amount of damage.

 Be especially careful that liquids at ULT are not spilled onto skin or clothing.  Use only sample containers that have been approved or tested for ULT use.  Some plastics shatter at Ultra Low Temperatures. Avoid splinter hazards.  Biological and Chemical Hazards are still hazardous at ULT. Always wear

proper protective equipment and follow appropriate isolation protocols.

 Many types of labels will fall off and/or break at ULT. Some types of ink which

stick to glass and/or plastic at room temperature lose adhesion at ULT.

• In addition to the ULT hazards above, there are also physical hazards to consider:

 Be cautious when closing the lid to avoid a pinching hazard.  Be careful when loading the box with heavy items.  Always use the handles to carry the freezer.

UNPACKING AND SET-UP

1. Remove the freezer and all accessories from the box. Carefully inspect the freezer and

all accessories for any shipping damage.

2. The following items are included;

¤ ULT25 Freezer with inner foam lid ¤ User Manual on CD ¤ SS-18 AC Power Supply with cord ¤ Warranty Registration ¤ 12V DC Power Cord (for auto accessory plug) ¤ Bag with stoppers for access port ¤ Key for lock ¤ Bag with sealing material for access port

3. Place the freezer on a level surface.

4. Make sure that the air inlets and outlets are not blocked

5. Connect to a power source. The freezer can be used with either the AC Power Supply

for lab, home or office use, or the DC Power Cord for automotive use.

a. To use the AC Power Supply:

i. Connect the square plugs on the end of the cord to the power supply as shown.

Securely tighten the terminal screw against the pin using a flat screwdriver.

ii. Be certain to observe the correct polarity.

Failure to do so may harm the freezer.

iii. Plug the black and red connectors into the

ULT25.

iv. Plug the AC Power Supply cord into a 115 volt

AC source. To use with a 220-240 V supply, the red switch on the AC Power Supply must be moved to the 230 V position.

v. Turn on the power supply

b. To use the DC Power Cord in a motor vehicle:

i. Make sure the freezer remains level. Exceeding

an angle of 12 degrees may cause loss of cooling.

ii. Plug the DC Power Cord into a 12V outlet that is rated at 18 amps or greater.

Consult your automotive specialist if your vehicle lacks 18+ A rated 12V outlets.

iii. Plug the black and red connectors into the ULT25.

6. NOTES ON OPERATION IN A VEHICLE a. The ULT25 will operate on battery power for a limited time before the battery is

drained and the car cannot be started. This time will vary from vehicle to vehicle but is generally only a few hours.

b. The engine should be running to prevent accidental total discharge of the battery. c. The power to 12V outlets in some vehicles may be interrupted during engine

starting. This will cause a sudden stop of the cooling unit which may produce a sound that is different than when the turning off the ULT25 by using the OFF button. This is normal and will not damage the cooling unit. The cooling unit will restart automatically once power resumes.

d. Do not operate the ULT25 an unattended in a vehicle. This may lead to overheating

if left in the sun and subsequent damage to stored contents

7. Disconnecting from power a. Turn off the freezer (see OPERATION section below)

i. The 7-segment display will show the word “OFF” while the FPSC turns off.

ii. Unplug the freezer after the word “OFF” disappears and the display goes dark.

iii. If you unplug the freezer while it is ON, you will hear a sudden noise when the

FPSC shuts OFF. Power outages will also cause the same noise.

FEATURES

Freezer

The Global Cooling ULT25 FPSC freezer has the following features:

• A freezer chamber which is protected by

two lids

o Inner lid – a tight fitting foam lid o Outer lid – a latching lid with a lock

• Control Panel

o Described in more detail in the next

section

• Locking latch

o Can be locked to provide sample

security

• Access port

o For thermocouple wires, purge gas, etc

• Cleanable filter

o Helps protect the heat rejection fins

from dust

• Power Connector

o Color coded for positive/negative,

can only mate with cords one way

Lid Latch

Key Lock

Control Panel

Cleanable Filter

Vent

Outer

Lid

Double Gasket

Moisture

Seal

Inner

Lid

1/4”

Access

Port

Freezer Chamber

Control panel

ON/OFF

LED

7-segment

display

Set T

LED

Indicator

LEDs

Global Cooling

ULT-25

ON/OFF

button

I/O

Ultra Low Temperature

- 80ºC LAB

FREEZER

DOWN/UP

buttons

Set T

Temperature

button

ErrorLocked Over T

Temperature Presets

1 2 3

Buttons 1, 2 and 3

Multifunctional, see

OPERATION section

7-Segment display

o Shows all numerical displays – default display is chamber temperature

ON/OFF button and LED

o Turns freezer on and off and shows state

Set T button and Set T LED

o This must be pressed to adjust the Set Temperature

Temperature Presets 1, 2 and 3

o These control the temperature Presets

 When the Set T LED is not glowing, pressing the button shows the

value

 When the Set T LED is glowing, pressing this button changes the set

point to the preset value

 Pressing and holding one of these buttons and  /  changes the value

o When the Error / Over T LEDs are lit then

 2 – shows and controls errors  3 – controls the audible over/under temperature alarm

o Pressing all three buttons simultaneously controls the panel LOCK function

 /  buttons

o Used to adjust Set Point Temperature (when the display shows S ##) o Used to adjust Preset Temperatures (when the display shows P ##) o Used to adjust Over/Under Temperature alarm settings (display shows ## h) o Used to show MIN / MAX temperatures since last reset (H### or L###)

Error LED

o Indicates when there is an electrical, mechanical or similar error condition.

Over T LED

o Indicates when the chamber is over / under the set point.

 The audible beeper can be set to delay warning.

Locked LED

 Indicates when the panel is locked.

In this User Guide indicator LEDs are italicized, control buttons and 7-segment display values are BOLD. Colored bullets and text are used to group similar features and are the same color through the text and in the Quick Guide at the end of the manual.

+ 11 hidden pages

Global Cooling ULT25 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual