Fisher Scientific Isotemp 5150 User manual

Fisher Scientific Isotemp
Ultra Low Temperature Chest Freezers
Operation Manual
7005150 Rev. 0
© 2009
All rights reserved
Printed in U.S.A.
Isotemp

Fisher ScientificFisher Scientific
MANUAL NUMBER 7005150
0 FR-2055 7/13/09 Original ccs
REV ECR/ECN DATE DESCRIPTION By
Preface
Isotemp ULT Chest i
Models Covered
Model Number Cu. ft. Voltage
5150 I903CA 3120
5151 I903C (D/V/W) 3230
5153 I913CA 12.7 120
5152 I913C (D/V/W) 12.7 230
5154 I917CA 17 120
5155 I917C (D/V/W) 17 230
5157 I920CA 20 120
5156 I920C (D/V/W) 20 230
Part No. Description Qty
34040 Key Ring 1
213F Key 2
380520 Neoprene Cap 2
510016 1/4-20 x 5-1/2” Bolt 2
402058 Vacu-Key 1
195763 Retaining Clip 1
370563 Remote Alarm Connector 1
Packing List
Important installer and user information:
A redundant temperature sensing device has been included in this freez-
er. This device is a type “T” thermocouple. For convenient access, the
thermocouple (Figure 1-3) terminates in an interconnect jack (Figure 1-
5) behind the base front cover. (May be located differently in chests. See
Section 1.) It is strongly recommended that this thermocouple be
attached to a redundant 24 hour 7 day monitoring system with alarm
capabilities. Connecting the sensor to a monitoring and alarm system
separate from the freezer provides the utmost in product safety, should
the integral system fail. s

Fisher Scientificii Isotemp ULT Chest Fisher Scientific
Preface
Important Read this instruction manual. Failure to read, understand and follow the instructions in this manual
may result in damage to the unit, injury to operating personnel, and poor equipment performance. s
Caution All internal adjustments and maintenance must be performed by qualified service personnel. s
Material in this manual is for information purposes only. The contents and the product it describes are subject
to change without notice. Fisher Scientific makes no representations or warranties with respect to this manual.
In no event shall Fisher be held liable for any damages, direct or incidental, arising out of or related to the use
of this manual.
© 2009 Fisher Scientific. All rights reserved.

Isotemp ULT Chest iiiFisher Scientific
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.
Hot surface(s) present which may cause burns to unprotected skin, or to materials which may be
damaged by elevated temperatures.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipment
falling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the market
after 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & Electronic
Equipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Fisher Scientific has
contracted with one or more recycling/disposal companies in each EU Member State European
Country, and this product should be disposed of or recycled through them. Further information on
Fisher’s compliance with this directive, the recyclers in your country and information on Fisher
products will be available at www.thermofisher.com.
4Always use the proper protective equipment (clothing, gloves, goggles, etc.)
4Always dissipate extreme cold or heat and wear protective clothing.
4Always follow good hygiene practices.
4Each individual is responsible for his or her own safety.

Isotemp ULT Chest ivFisher Scientific Isotemp ULT Chest iv
Table of Contents
Installation and Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Control Panel Keys, Display, Indicators . . . . . . . . . . . . . . . . . . . . . . .1-5
Install Freezer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
RS-232 Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Install Wall Bumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Choose Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Remote Alarm Contacts and Analog Output . . . . . . . . . . . . . . . . .1-9
Connect Unit to Electrical Power . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Attach Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Set Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Freezer Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Set Low Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
Set High Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13
Access Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13
Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrate Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrate Control Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Configuration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Low Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
High Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
BUS Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
System Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Set Access Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Clear High Stage Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Display Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Back Up System Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
RS485 Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Section 1
Section 2
Section 3

v Isotemp ULT Chest Fisher Scientific
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Wrong Power Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Lost Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Probe Failure Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Micro Board Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Multiple Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Voltage Compensation Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
High Stage System Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean Cabinet Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean Lid Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Defrost Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Replace Battery(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
All Models Except 3 cu ft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
3 cu ft Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Prepare Unit for Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
Factory Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
BUS - Back Up System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Install Injection Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Install Temperature Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
BUS Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4
Connect Probe/Solenoid Harness . . . . . . . . . . . . . . . . . . . . . . . . . .6-4
Set Optional BUS Set Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Configure Optional BUS (Back Up System) . . . . . . . . . . . . . . . . . .6-5
Test the BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Disconnect Fitting Assembly, Transfer Hose . . . . . . . . . . . . . . . . . .6-6
Calibrate Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Change Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Install Chart Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Handling Liquid Nitrogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A - 1
Handling Liquid CO2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B - 1
First Aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C - 1
Table of Contents
Section 4
Section 5
Section 6
Section 7
Appendix A

Isotemp ULT Chest 1-1Fisher Scientific
Section 1 Installation and Start-up
Figures 1-1 and 1-2 show the front view of the freezer and indicate the
following freezer components:
• Control Panel - keypad, displays and indicators.
• BUS (Optional Back Up System) panel.
• Optional temperature recorder (7 day, one pen) or datalogger.
• Keylock - keyed lid lock.
Optional Back Up
System Controls
Control Panel
Optional
Datalogger
or Recorder
Key lock
Figure 1-1. Front View 3 cu ft Models
EnviroScan
Control
Optional
BUS Control
Keylock
Optional Recorder
or Datalogger
Figure 1-2. Front View Remaining Models

1-2 Isotemp ULT Chest Fisher Scientific
Section 1
Installation and Start-up
Figures 1-3 and 1-4 display the rear view of the freezer and indicate the
following freezer components:
• Remote alarm contacts and selectable analog output connection - 0-
1V, 4-20mA (default), 0-5V).
• Power inlet for power cord connection.
• Optional BUS connections for probe and solenoid.
• RS-232 or RS-485 interface.
• Power Switch (mains disconnect).
Optional BUS battery
(just behind this panel)
Optional
BUS Connections
RS-232 or RS-485
Interface
Remote Alarm Contacts
and Analog Output
Power Switch
(mains disconnect)
Power Inlet
Threaded holes for
wall bumpers
Figure 1-3. Rear View 3 cu ft Models
Threaded holes for
wall bumpers
Remote Alarm Contacts
and Analog Output
Optional
BUS Connections
Power Inlet
Power Switch
(mains disconnect)
RS-232 or RS-485
Interface
Figure 1-4. Rear View Remaining Models

Isotemp ULT Chest 1-3Fisher Scientific
Section 1
Installation and Start-up
The probe cover houses the control, optional recorder, datalogger, Model
1535 alarm, or BUS probes.
Figures 1-6, 1-7, and 1-8 indicate the following components:
• Freezer filter location
• Battery power switch (freezer and BUS)
• Thermocouple receptacle
• Battery mounting bracket
• Freezer and optional BUS battery
Figure 1-5. Probe Cover
aaaaaaa
aaaaaaa
aaaaaaa
aa
aaa
aa
aa
aaa
aa
aa
aaa
aa
aa
aaa
aa
aa
aaa
aa
aa
aaa
aa
aa
aaa
aa
aa
aaa
aa
aa
aaa
aa
aa
aaa
aa
aa
aaa
aa
aa
aaa
aa
aaa
a
aaa
aaaaaaa
aaaaaaa
To remove
filter
Thermocouple
interconnect jack
O
Battery
Switch
Condenser
Figure 1-6. All Except 3 cu ft Models

1-4 Isotemp ULT Chest Fisher Scientific
Section 1
Installation and Start-up
micro
board
battery
bracket
battery
switch
probe
access
port
Figure 1-7. Freezer Left Side - Sidecar panel removed
O
aaaaaaaa
aaaaaaaa
aaaaaaaa
aa
aaaa
aa
aa
aaaa
aa
aa
aaaa
aa
aa
aaaa
aa
aa
aaaa
aa
aa
aaaa
aa
aa
aaaa
aa
aa
aaaa
aa
aa
aaaa
aa
aaa
a
a
a
aa
aaaaaaaa
aaaaaaaa
O
System
battery
Battery
switch
Thermocouple
interconnect jack
To
remove filter
Figure 1-8. 3 cu ft Models

1. Mode select switch - Used to select Run, Settings, Calibrate and
System Configuration Modes.
2. Temperature display - Displays temperature in degrees Celsius.
3. Alarm indicator - Light pulses on/off during an alarm condition of the
cabinet.
4. Silence - Mutes the audible alarm.
5. Low Battery - indicates a low battery condition of the freezer battery.
6. Hot Condenser - indicates a hot condenser condition.
7. Message Center - displays system status and alarms.
8. Scroll for Parameters arrows - moves the operator through the choices
of the selected mode.
9. Up and down arrows - Increases or decreases values, toggles between
choices.
10. Enter - Stores the value into computer memory.
Isotemp ULT Chest 1-5Fisher Scientific
Section 1
Installation and Start-up
SYSTEM OK
Mode
Temp Display Visual Alarm
Indicator
Silence
Low Battery
Indicator
Hot Condenser
Indicator
Message
Center
Scroll for Parameters
Arrows Up and Down
Arrows
Enter
Figure 1-9. Control Panel Keys, Display and Indicators
Control Panel Keys,
Display, Indicators

Isotemp ULT freezers have four basic modes which allow freezer setup:
Run, Settings, Calibrate and Configuration.
Run is the default mode which the freezer will normally be in during
operation.
Settings is used to enter system set points for freezer operation.
Calibrate is used to calibrate various system parameters.
Configuration allows for custom setup of various options.
The chart below shows the selections under each of the modes.
1-6 Isotemp ULT Chest Fisher Scientific
Section 1
Installation and Start-up
RUN SETTINGS CALIBRATE CONFIGURATION
Default Mode
SYSTEM OK Control Set Point Control Probe High Alarm Test
LINE VOLTAGE High Alarm Set
Point
Optional Sample
Probe Low Alarm Test
COMPENSATED
VOLTAGE
Low Alarm Set
Point System Battery Test
HSHX
TEMPERATURE
Optional Back Up
System Set
Point
BUS Battery Test
Display Temperature
Clear High Stage
Alarm
Set Access Code
RS485 Address
BUS type CO2or LN2
Table 1-1. Modes of Operation
Panel Keys, Display,
Indicators (cont.)

Scroll for Parameters arrows: Steps the operator through the parameters
of SETTINGS, CALIBRATE and CONFIGURATION Modes. The
right arrow goes to the next parameter, the left arrow returns to the
previous parameter.
Up arrow: Increases or toggles the parameter value that has been selected
in the SETTINGS, CALIBRATE, and CONFIGURATION Modes.
Enter: Must press Enter key to save to memory all changed values.
Down arrow: Decreases or toggles the parameter values that have been
selected in the SETTINGS, CALIBRATE and CONFIGURATION
Modes.
Silence key: Press to mute the audible alarm. See Section 4 for alarm
ringback times.
There are two displays on the control panel. The temperature display
shows the temperature in degrees Celsius. The message center displays the
system status (Mode) at all times. The message SYSTEM OK displays
during normal operation. Alarm messages are displayed if the system
detects an alarm condition. See Section 4 - Alarms.
To remove the freezer from the pallet, use a 7/16" wrench to remove all the
bolts securing the shipping bracket to the pallet.
Note If tipped more than 45°, allow the unit to set upright for 24 hours
before start up. s
Remove the shipping bracket. Remove the ramp boards from the pallet
and place the slotted end over the ramp brackets on the pallet. The
support blocks on the ramps will be facing down. Before moving the
freezer, make sure the casters are unlocked and moving freely. Align the
caster with the ramp boards. Use adequate personnel to roll the freezer off
the pallet.
The freezer can be easily pushed to the desired approved location, as
described previously. When the freezer is in position, set the front caster
brakes.
Note Do not move the freezer with the product load inside. s
Isotemp ULT Chest 1-7Fisher Scientific
Section 1
Installation and Start-up
Displays
Install Freezer
Panel Keys, Display,
Indicators (cont.)

Locate the freezer on a firm, level surface in an area with an ambient
temperature between 18°C and 32°C. Provide ample room to reach the
mains disconnect switch (power switch) located on the rear of the freezer.
Note For proper ventilation and airflow, a minimum clearance of 5” at the
rear and front and a clearance of 8” on the side of the freezer is required.
Allow adequate space for lid opening. If ambient increases above 36°C,
clearance at the rear of the cabinet must be increased to 8”. s
The parts bag, located inside the cabinet, contains the following parts.
Install the bolts into the pre-tapped holes on the back of the compressor
section. Install a neoprene cap on each bolt. Refer to Figure 1-2 for the
locations of the pre-tapped holes.
Isotemp ULT freezers have a data communications interface. The factory
default setting is RS-232.
The wiring identification for the interface is
shown in Figure 1-10. One nine pin, sub
"D" style connector is located on the back
of the freezer. See Figure 1-2 for the location
of the connector on the freezer.
The freezer transmits temperature information every 60 minutes. A
standard DB9 serial extension cable can be used to connect the freezer to a
serial device. Some serial devices may require a null modem adapter.
Data format:
Baud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1200
Data bits . . . . . .8 (7 bit ASCII with leading zero)
Start bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Stop bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Parity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .none
1-8 Isotemp ULT Chest Fisher Scientific
Section 1
Installation and Start-up
Quantity Stock # Description Purpose
2510016 1/4-20 x 5-1/2” Bolt Wall Bumper
2380520 Neoprene Cap Cap Protector
Choose Location
Install Wall Bumpers
RS-232 Communications
Figure 1-10. RS-232 Interface

The data transfer sequence is transmitted in the following format. X refers
to numerical temperature data.
(NUL) (-) XXX (SP) C (SP) (OVERTEMP) (SP) (LF) (CR) (EOT) (SP)
(UNDER TEMP)
The words "OVER TEMP" or "UNDER TEMP" are transmitted when
an alarm condition exists along with the temperature. If no alarm
condition exists, spaces will be sent. A total of 20 characters will be sent.
SP - Space LF - Line feed
CR - Carriage return EOT - End of text (4)
NUL - Null character (00)
Isotemp ULT freezers have remote alarm contacts and analog output. See
Figures 1-3 and 1-4 for the location of the remote alarm contacts. The
remote alarm connector is located in the parts bag provided with the
manual. It must be installed if connecting the freezer to an alarm system.
After installing the wiring from the
alarm system to the connector, install
the connector to the freezer
microboard and secure with the two
screws provided. The remote alarm
provides a NO (normally open)
output, a NC (normally closed)
output and COM (common). The
contacts will trip on a power outage,
high temperature alarm or low
temperature alarm. Figure 1-11
shows the remote contacts in alarm
state.
The analog output function allows the freezer to output signals
representing the temperature of the freezer cabinet. The factory default
setting is 4-20 mA. Refer to Table 1-2 for output specifications.
Isotemp ULT Chest 1-9Fisher Scientific
Section 1
Installation and Start-up
Remote Alarm Contacts
and Analog Output
Figure 1-11. Remote Alarm Contacts
4-20 mA 0-1V 0-5V
Temperature -100 to +50°C -100 to +50°C -100 to +50°C
Table 1-2. Analog Output Specifications
IMPORTANT USER INFORMATION
IMPORTANT USER INFORMATION
Caution! Stored product should be protected
by a redundant 24 hour/day monitoring
system with alarm capability. An interconnect
jack and thermocouple are installed
for centralized monitoring should on-board
system fail.
RS-232 Communications
(continued)

Insert the power cord into the power inlet module. Place the retaining
bracket (P/N 195763) over the connector. Tighten retaining screws to
secure.
Note See the serial tag on the side of the unit for electrical specifications or
refer to the electrical schematics in this manual. s
The freezer should be operated on a dedicated, grounded service. Check
the voltage rating on the serial tag of the unit and compare it with the
outlet voltage. Then, with the power switch turned off, plug the line cord
into the wall outlet.
First, turn on the freezer power switch. Then open the lower front door by
grasping the bottom left corner. Locate the battery switch (Figure 1-4) and
turn it to Standby mode ( ). During initial freezer start-up, the system
battery may require charging and the Low Battery message may appear in
the message center.
Note Ensure the battery switch is turned to Standby mode ( ). The
rechargeable batteries require 36 hours to charge at initial start-up. A “Low
Battery” alarm may occur until the batteries are fully charged. Should a
power failure occur during the initial start-up period, the electronics will
have limited operation. s
1-10 Isotemp ULT Chest Fisher Scientific
Section 1
Installation and Start-up
Attach Power Cord
Connect Unit to Electrical
Power
Figure 1-12. Power Cord Attachment

With the freezer properly installed and connected to power, system set
points can be entered. The following set points can be entered in Settings
mode: Control temperature, high temperature alarm set point, low
temperature alarm set point, and (optional) BUS set point. Default settings
are shown in the table below. See chart below for more detail.
Note If the set point is changed and the low temperature and high
temperature alarms are set 10° from the set point, the alarm set points will
be adjusted automatically to maintain a distance of at least 10° from set
point. s
The freezer has an operating temperature range of -50°C to -86°C,
depending on ambient temperature. The freezer is shipped from the
factory with a temperature set point of -80°C. To change the operating
temperature set point:
1. Press the Mode key until the Settings indicator lights.
2. Press the right arrow until “SET PT = -XX” is displayed in the message
center.
3. Press the up/down arrow key until the desired temperature set point is
displayed.
4. Press Enter to save the set point.
5. Press the Mode key until the Run indicator lights for Run mode or
press the right/left arrow keys to go to next/previous parameter.
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
Isotemp ULT Chest 1-11Fisher Scientific
Section 1
Installation and Start-up
Freezer Start-Up
Control Set Point -80°C
High Temperature Alarm -70°C
Low temperature alarm -90°C
Optional BUS Set Point -60°C
Set Operating
Temperature

The high temperature alarm activates an audible/visual warning when the
freezer chamber temp reaches or exceeds the high temp alarm set point.
To set the high temperature alarm set point:
1. Press the Mode key until the Set indicator lights.
2. Press right arrow until “HI ALM = -XX” displays in message center.
3. Press the up or down arrow key until the desired high temperature
alarm set point is displayed.
4. Press Enter to save the setting.
5. Press the Mode key until the Run indicator lights or press the right or
left arrow to go to the next or previous parameter.
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
Note The high alarm set point must be set at least 5°C from the control
set point. s
Note At initial start-up, the high temperature alarm is disabled until the
cabinet reaches set point or 12 hours elapse. s
The low temperature alarm activates an audible/visual warning when the
freezer chamber temp reaches or decreases below low temp alarm set point.
To set the low temperature alarm set point:
1. Press the Mode key until the Settings indicator lights.
2. Press right arrow until “LO ALM = -XX” displays in message center.
3. Press the up or down arrow key until the desired low temperature
alarm set point is displayed.
4. Press Enter to save the setting.
5. Press the Mode key until the Run indicator lights or press the right or
left arrow to go to the next or previous parameter.
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
Note The low alarm set point must be set at least 5°C from the control set
point. s
1-12 Isotemp ULT Chest Fisher Scientific
Section 1
Installation and Start-up
Set High Temperature
Alarm
Set Low Temperature
Alarm

An access code can be set to prevent unauthorized change of settings in
Calibrate, Configuration and Settings mode. (An access code of 000 is
required to make changes.) If the access code is not at the default 000, you
can not leave RUN mode without entering a code. See Section 3,
Configuration for instructions on modifying the access code.
Run mode is the default mode for the freezer. The run mode displays the
cabinet temperature on the temperature display and ‘SYSTEM OK’ on the
message center under normal operating conditions. In addition, the Run
mode allows display of the following information:
LINE VOLTAGE
COMPENSATED VOLTAGE
HSHX TEMPERATURE (heat exchanger temperature)
This information is scrolled individually by pressing the right arrow key. In
each case, the message center returns to SYSTEM OK in 10 seconds if no
keys are pressed.
Isotemp ULT Chest 1-13Fisher Scientific
Section 1
Installation and Start-up
Access Code
Run Mode