Fisher Scientific 8965 User manual

Isotemp -86C Freezers
Installation and Operation Manual
7028965 Rev. 0
© 2013 Fisher Scientific Inc.
All rights reserved
Printed in U.S.A.
Isotemp

Fisher Scientific
Preface
Isotemp -86C Freezers i
Catalog
Number Model Capacity in
Cubic Feet Voltage
IU1386V 8965 13 230/50
IU1386D 8966 13 230/60
IU1386A 8967 13 120/60
IU1786A 8968 17 120/60
IU1786D 8969 17 230/60
IU1786V 8970 17 230/50
IU2386V 8971 23 230/50
IU2386D 8972 23 230/60
IU2386A 8973 23 120/60
IU2886D 8974 28 230/60
IU2886V 8975 28 230/50
MANUAL NUMBER 7028965
0 FR-2400 1/28/13 Release 8 - Oil separator & compressor - elec & refrig schematics, base expl dwg ccs
REV ECR/ECN DATE DESCRIPTION By
Important installer and user information:
A redundant temperature sensing device has been included in this ULT
freezer. 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 -86C Freezers
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 Scientific be held liable for any damages, direct or incidental, arising out of or related to the
use of this manual.
©2013 Thermo Fisher Scientific. All rights reserved.

Fisher Scientific Isotemp -86C Freezers iii
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 Scientific’s compliance with this directive, the recyclers in your country and information on
Fisher Scientific products will be available at www.fishersci.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.

Fisher Scientificiv Isotemp -86C Freezers
Preface
Do You Need Information or Assistance
on Fisher Scientific Equipment?
The Fisher Scientific Sales Group can provide information on pricing and give you
quotations. We can take your order and provide delivery information on major equipment items or
make arrangements to have your local sales representative contact your. Our products are listed on
the internet and we can be contacted through our Internet home page.
1-800-766-7000 Customer Service
www.fishersci.com To order online
Fisher Scientific Product Service Support can supply technical information about proper
setup, operation or troubleshooting of your equipment. We can fill your needs for replacement parts
or provide you with on-site service. We can also provide you with a quotation on our Extended
Maintenance Program for our products.
Whatever products you need or use, we will be happy to discuss your applications. If you are
experiencing technical problems, working together, we will help you locate the problem and, chances
are, correct it yourself...over the telephone without a service call.
When more extensive service is necessary, we will assist you with direct factory trained
technicians or a qualified service organization for on-the-spot repair. If your service need is covered
by the Fisher Scientific Products warranty, we will arrange for the unit to be repaired at our expense
and to your satisfaction.
Regardless of your needs, professional service technicians are available by telephone to assist
you concerning our products Monday through Friday from 8:00 a.m. to 6:00 p.m. Eastern Time.
Please call or fax us at:
1-800-766-7000 Customer Service
1-800-926-1166 Orders Fax
International customers, please contact your local Fisher Scientific distributor.

Isotemp -86C Freezers vFisher Scientific
Table of Contents
Installation and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Control Panel Keys, Displays & Indicators . . . . . . . . . . . . . . . . . . . .1-3
Keypad Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Install the Freezer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Choose the Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
RS-232 Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Install the Wall Bumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Install the Shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Attach the Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Connect the Unit to Electrical Power . . . . . . . . . . . . . . . . . . . . . . .1-8
Remote Alarm Contacts and Analog Output . . . . . . . . . . . . . . . . .1-8
Freezer Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Set the Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Set the High Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Set the Low Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Access Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrate the Control Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrate the Optional Sample Probe . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Low Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
High Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
System Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
BUS Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Clear High Stage Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Display Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Set an Access Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
RS485 Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Back-Up System Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Warm Excursion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Cold Excursion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Reset Excursion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Section 1
Section 2
Section 3

vi Isotemp -86C Freezers Fisher Scientific
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
High Stage System Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean Cabinet Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean the Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean the Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Clean the Door Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Defrost the Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Vacuum Relief Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
Replace the Battery(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
Prepare the Unit for Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Factory Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
BUS-Back-Up System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Install Injection Assembly, Vent Stack and Solenoid . . . . . . . . . . . .6-1
Install the Temperature Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Connect the Probe/Solenoid Harness . . . . . . . . . . . . . . . . . . . . . . .6-4
BUS Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Test the BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Clean the Vent Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Set the Optional BUS Set Point . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Disconnect the Fitting Assembly & Transfer Hose . . . . . . . . . . . . .6-7
Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Install the Chart Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Change Recorder Temperature Range . . . . . . . . . . . . . . . . . . . . . . .6-8
Calibrate the Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
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

Isotemp -86C Freezers 1-1Fisher Scientific
• Control Panel - keypad, displays and indicators.
• BUS (Optional Back Up System) panel.
• Optional temperature recorder - 7 day, one pen or datalogger.
• Documentation compartment - storage of user’s manual and other docu-
mentation.
• 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 (default) or RS-485 interface.
• Power Switch (mains disconnect).
Section 1 Installation and Start-Up
Optional Back Up
System Controls
Temperature
Recorder
(Optional)
Control Panel
Documentation
Compartment
Figure 1-1. Front View
Optional Back-up
System Connections
RS-232 or RS-485
Interface
Power Switch
(mains disconnect)
Power Inlet
Wall Bumper
(pre-tapped holes)
Remote Alarm Contacts
and Analog Output
Figure 1-2. Rear View

1-2 Isotemp -86C Freezers Fisher Scientific
Section 1
Installation and Start-Up
Figure 1-5
• Battery mounting bracket(s)
• Battery power switch (freezer and BUS)
• Freezer battery
• Optional BUS battery
• Freezer filter location
Sealant
(Caution: This is a critical seal.
Seal must be maintained.)
Optional - Recorder Probe/Datalogger Probe
Control RTD/Redundant Type T
Thermocouple Probe
Optional Miscellaneous Accessories Probe
Figure 1-3. Chamber Probe
Vacuum
Relief Port
Chamber
Probe Cover
Figure 1-4. Vacuum Relief and Probe Cover Location
Battery power
switch To
remove filter
Thermocouple
interconnect jack
Battery mounting
bracket
Freezer battery
and optional BUS battery
Figure 1-5. Battery(s) Location and Switch
Figures 1-3 & 1-4
• Vacuum relief port -
pressure equalization
port
• Probe cover - houses
control, optional
recorder, datalogger or
1535 alarm probes

Isotemp -86C Freezers 1-3Fisher Scientific
Section 1
Installation and Start-Up
Mode Select Switch - Used to select Run, Settings, Calibrate and
System Configuration Modes.
Mode Select Indicators -
Run: Run Menu
Settings: Set Points Menu
Calibrate: Calibrate Menu
Configuration: Configuration Menu
Temperature Display - Displays temperature in degrees Celsius.
Alarm Indicator - Light pulses on/off during a cabinet alarm condition.
Silence - Silences the audible alarm.
Low Battery - indicates a low battery condition of the freezer battery.
Hot Condenser - indicates a hot condenser condition.
Message Center - displays system status and alarms.
Scroll for Parameters Arrows - moves the operator through the choices
of the selected mode.
Up and Down Arrows - Increases or decreases values, toggles between
choices.
Enter - Stores the value into computer memory.
Control Panel Keys,
Displays & Indicators
Figure 1-6. Control Panel
Temperature Display
Message Center
Mode Key
Up and Down
Arrows
Enter Key
Alarm Indicator
Silence Key Low Battery
Indicator
Hot Condenser
Indicator
Scroll for Parameters
Arrows

Isotemp -86C freezers have four basic modes which allow freezer setup:
Run, Settings, Calibrate and Configuration.
Run is the default mode for the freezer during normal 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.
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 pre-
vious 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.
1-4 Isotemp -86C Freezers Fisher Scientific
Section 1
Installation and Start-Up
Keypad Operation
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 CO2 or LN2
Cold Excursion
Warm Excursion
Reset Excursion

Install the Freezer
Down Arrow: Decreases or toggles the parameter values that have been
selected in the SETTINGS, CALIBRATE and CONFIGURATION
Modes.
Silence Key: Press to silence the audible alarm. See Section 4 for alarm
ringback times.
Message Center: Displays the system status (Mode) at all times. Displays
SYSTEM OK during normal operation, or alarm messages if the system
detects an alarm condition. See Section 4 - Alarms.
Caution If tipped more than 45°, allow the unit to set upright for 24 hours
before start up. s
To remove the freezer from the pallet, use the 7/16" wrench to remove all
the bolts securing the shipping bracket to the pallet.
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,
described in the following section. If necessary, the doors and lower front
panel may be opened to move the unit through tight openings. When the
freezer is in position, set the front caster brakes.
Caution The freezer must not be moved with the product load inside. s
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.
Caution For proper ventilation and airflow, a minimum clearance of 5” at
the rear and top and a clearance of 8” on the side of the freezer is required.
Allow adequate space in the front of the freezer for door opening. s
Isotemp -86C Freezers 1-5Fisher Scientific
Section 1
Installation and Start-Up
Keypad Operation
(continued)
Displays
Choose the Location

Install the Shelves
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.
Install the shelf clips into the shelf pilasters (front and back) at the desired
shelf level. Install the shelves in the cabinet onto the clips.
Note Maximum shelf load is 100 lbs (45.4 kg) per shelf. s
The Isotemp -86C freezers have a data communications interface. The
factory default setting is RS-232.
The wiring identification for the interface is
shown in Figure 1-7. 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
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Parity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .none
1-6 Isotemp -86C Freezers Fisher Scientific
Section 1
Installation and Start-Up
Qty Stock # Description Purpose
2510016 1/4-20 x 5-1/2” Bolt Wall Bumper
2380520 Neoprene Cap Cap Protector
Install the Wall Bumpers
RS-232 Communications
Figure 1-7. Wiring

The data transfer sequence is transmitted in the following format. X refers
to numerical temperature data.
(NUL) (-) XXX (SP) C (SP) (Error Message) (SP) (LF) (CR) (EOT) (SP)
In the event of a CNTRLFAIL, Er07, or the control probe is out of range
error, the numerical temperature data (XXX) in the transmission would be
replaced by T_ERR.
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)
If an alarm condition does exist, “Error Message” in the protocol will be
replaced by the following:
UNDERTEMP (temperature above the low alarm setpoint)
OVERTEMP (temperature below the high alarm setpoint)
PWRFAIL (AC power failure)
CNTRLFAIL (Control probe failure)
Er07 (Micro failure)
HSHX FAIL (Heat exchanger failure)
HOT COND (Hot condenser)
Isotemp -86C Freezers 1-7Fisher Scientific
Section 1
Installation and Start-Up
RS-232 Communications
(continued)

Isotemp -86C freezers have remote alarm contacts and analog output. See
Figure 1-2 for the location of the remote alarm contacts. The remote alarm
connector is shipped 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.
They will also trip on high stage, control probe or
microboard failures. Figure 1-8 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 Figure 1-9
for output
specifications.
Insert the power cord into the power inlet module. Place the retaining
bracket (P/N 195763) over the connector. Tighten retaining screws to
secure.
Caution 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.
1-8 Isotemp -86C Freezers Fisher Scientific
Section 1
Installation and Start-Up
Remote Alarm Contacts
and Analog Output
Figure 1-8. Remote
Contacts in Alarm
Figure 1-9. 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.
4-20 mA 0-1V 0-5V
Temperature -100 to +50°C -100 to +50°C -100 to +50°C
Connect the Unit to
Electrical Power
Figure 1-10. Secure Power Cord
Attach the Power Cord

First, turn on the freezer power switch. Then open the lower front door by
grasping the bottom left corner. Locate the battery switch (Figure 1-5) and
turn it to Standby mode ( ). During initial freezer start-up, the system
battery may require charging and the Low Battery indicator may
illuminate.
Caution 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
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 Table 1-1.
Caution 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
adjust automatically to maintain a distance of at least 10° from set point. s
Isotemp -86C Freezers 1-9Fisher Scientific
Section 1
Installation and Start-Up
Connect the Unit to
Electrical Power (cont.)
Freezer Start-Up
Control Set Point -80°C
High Temperature Alarm -70°C
Low temperature alarm -90°C
Optional BUS Set Point -60°C
Table 1-1. Default Settings

All Isotemp -86C freezers have 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.
The high temperature alarm will activate an audible/visual warning when
the freezer chamber temperature has reached or exceeded the high
temperature alarm set point. To set the high temperature alarm set point:
1. Press the Mode key until the Set indicator lights.
2. Press the right arrow until “HI ALM = -XX” is displayed in the
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
1-10 Isotemp -86C Freezers Fisher Scientific
Section 1
Installation and Start-Up
Set the High Temperature
Alarm
Set the Operating
Temperature

The low temperature alarm will activate an audible/visual warning when
the freezer chamber temperature has reached or decreased below the low
temperature alarm set point. To set the low temperature alarm set point:
1. Press the Mode key until the Settings indicator lights.
2. Press the right arrow until “LO ALM = -XX” is displayed in the
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
An access code of 000 is required to access the Settings, Calibrate or
Configuration modes. If the access code is not at the default 000, a code
must be entered to leave RUN mode. See Section 3 to modify the access
code.
Run mode is the default mode for the freezer. Run mode will display the
cabinet temperature on the temperature display and ‘SYSTEM OK’ on the
message center under normal operating conditions. In addition, 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 -86C Freezers 1-11Fisher Scientific
Section 1
Installation and Start-Up
Run Mode
Access Code
Set the Low Temperature
Alarm

1-12 Isotemp -86C Freezers Fisher Scientific
Section 1
Installation and Start-Up
Press MODE
to light SETTINGS
indicator
SET PT = -XX
Numbers increase
Press MODE to move
to CALIBRATE
mode
Numbers decrease
Press Enter
to save setting
Scroll for Parameters
Scroll for Parameters
HI ALM = -XX
Scroll for Parameters
Press to return
to previous parameter
Press to return
to previous parameter
Press to return
to previous parameter
Low Alarm
Set Point
High Alarm
Set Point
Control
Set Point
To Set:
Settings Mode
Numbers increase
Numbers decrease
Press Enter
to save setting
Numbers increase
Numbers decrease
Press Enter
to save setting
Press to return
to previous parameter
Optional
Back Up System
Set Point
Numbers increase
Numbers decrease
Press Enter
to save setting
LO ALM = -XX
BACKUP = -XX
Scroll for Parameters
MODE
MODE
MODE
MODE

Isotemp -86C Freezers 2-1Fisher Scientific
Section 2 Calibrate
After the freezer has stabilized, the control or sample probe may require
calibration. Calibration frequency is dependent on use, ambient conditions
and accuracy required. A good laboratory practice would require at least an
annual calibration check. On new installations, all parameters should be
checked after the stabilization period.
Caution Before making any calibration or adjustments to the unit, it is
imperative that all reference instruments be properly calibrated. s
Plug a type T thermocouple reader into the receptacle located inside the
lower door (see Figure 1-5). Compare the control temperature set point to
the temperature of the measuring device. See Chart 2-1 at the end of this
section for more detail.
1. Press the Mode key until the Calibrate indicator lights.
2. Press the right arrow until “CONT T = -XX.X” appears in the message
center.
3. Press up/down arrow to match the display to calibrated instrument.
4. Press Enter to store calibration.
5. Press the Mode key to return to Run or the right/left arrow to go to
next/previous parameter.
Calibrate the Control
Probe
This manual suits for next models
21
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