Helmer i Series User manual

Freezer Instructions for Use
i.Series®and Horizon Series™
Upright - Undercounter
360416/B
Laboratory
i.Series
iLF105-GX
iLF120-GX
iLF125-GX
Horizon Series
HLF105-GX
HLF120-GX
HLF125-GX
Blood Bank/Plasma Storage
i.Series
iBF105-GX
iBF120-GX
iBF125-GX
Horizon Series
HBF105-GX
HBF120-GX
HBF125-GX

Document Updates
The document is furnished for informational use only, is subject to change without notice and should not be construed as a
commitment by Helmer Scientic. Helmer Scientic assumes no responsibility or liability for any errors or inaccuracies that may
appear in the informational content contained in this material. For the purpose of clarity, Helmer Scientic considers only the most
recent revision of this document to be valid.
Notices and Disclaimers
Condential / Proprietary Notices
Use of any portion(s) of this document to copy, translate, disassemble or decompile, or create or attempt to create by reverse
engineering or otherwise replicate the information from Helmer Scientic products is expressly prohibited.
Copyright and Trademark
Copyright © 2021 Helmer, Inc. Helmer®, i.Series®, i.C³®, Horizon Series™, and Rel.i™ are registered trademarks or trademarks
of Helmer, Inc. in the United States of America. All other trademarks and registered trademarks are the property of their respective
owners. Helmer, Inc., doing business as (DBA) Helmer Scientic and Helmer.
Disclaimer
This manual is intended as a guide to provide the operator with necessary instructions on the proper use and maintenance of
certain Helmer Scientic products.
Any failure to follow the instructions as described could result in impaired product function, injury to the operator or others, or void
applicable product warranties. Helmer Scientic accepts no responsibility for liability resulting from improper use or maintenance of
its products.
The screenshots and component images appearing in this guide are provided for illustrative purposes only, and may vary slightly
from the actual software screens and/or product components.
Helmer Scientic
14400 Bergen Boulevard
Noblesville, IN 46060 USA
www.helmerinc.com Part No. 360416/B
Document History
Revision Date CO Supersession Revision Description
A 15 OCT 2020 15545 n/a Initial release
B8 MAR 2021 15909 B supersedes A Updated content to include upright freezers.
* Date submitted for Change Order review. Actual release date may vary.

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B ii
Contents
1 About this Manual................................................................................................ 4
1.1 Intended Audience ..........................................................................................4
1.2 Model Reference............................................................................................4
1.3 Intended Use...............................................................................................4
1.4 Safety Symbols and Precautions ...............................................................................4
1.5 Avoiding Injury..............................................................................................5
1.6 General Recommendations ...................................................................................5
2 Installation ...................................................................................................... 6
2.1 Location...................................................................................................6
2.2 Placement and Leveling ......................................................................................6
2.3 Stacked Undercounter Units...................................................................................6
2.4 AC Power Cord.............................................................................................6
2.5 Temperature Probes ......................................................................................... 7
2.6 Chart Recorder (if included) ...................................................................................8
3 i.Series®Operation .............................................................................................. 10
3.1 Initial Power-up ............................................................................................ 10
3.2 Operation .................................................................................................11
3.3 Change Temperature Setpoint .................................................................................11
3.4 Set Alarm Parameters.......................................................................................12
3.5 Active Alarms .............................................................................................13
3.6 Mute Active Alarms .........................................................................................13
4 Min/Max Temperature Monitoring .................................................................................. 15
5 i.Series®Access Control (Optional)................................................................................. 16
5.1 Setup....................................................................................................16
5.2 Open Freezer with Access Control ............................................................................. 16
6 Horizon Series™ Operation ....................................................................................... 17
6.1 Initial Power Up ..............................................................................................17
6.2 Display Minimum and Maximum Monitor Temperature Recordings....................................................... 17
6.3 Set Parameter Values .........................................................................................19
6.4 Set Temperature Units ......................................................................................... 19
6.5 Set Alarm Setpoints (Parameters) ................................................................................19
6.6 Temperature Calibration O󰀨sets.................................................................................. 19
6.7 Active Alarms ................................................................................................20
6.8 Mute and Disable Audible Alarms................................................................................. 20
7 Horizon Series™ Access Control (Optional) ......................................................................... 21
7.1 Setup ......................................................................................................21
8 ProductSpecications ........................................................................................... 22
8.1 Operating Standards........................................................................................22
9 Compliance .................................................................................................... 24
9.1 Safety Compliance .........................................................................................24
9.2 Environmental Compliance...................................................................................24
9.3 EMC Compliance ..........................................................................................24

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B iii

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 4
1 About this Manual
1.1 Intended Audience
This manual provides information on how to use i.Series®and Horizon Series™laboratory and plasma storage freezers. It is
intended for use by end users of the freezer and authorized service technicians.
1.2 Model Reference
Models are indicated by a distinguishing model number that corresponds to the series, type, and capacity of the freezer. For
example, “iLF105-GX” refers to an i.Series Laboratory Freezer with 1 door and a capacity of 5 cu ft.
1.3 Intended Use
Note
This equipment has been tested and found to comply with the limits for a Class Adigital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment
is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required
to correct the interference at his own expense.
Helmer freezers are intended for the storage of blood products and other medical and scientic products.
1.4 Safety Symbols and Precautions
Symbols found in this document
The following symbols are used in this manual to emphasize certain details for the user:
Task Indicates procedures which need to be followed.
Note Provides useful information regarding a procedure or operating technique when using Helmer
Scientic products.
NOTICE Advises the user against initiating an action or creating a situation which could result in damage to
equipment; personal injury is unlikely.
Symbols and Labels found on the units
The following symbols may be found on the freezer or freezer packaging:
Warning: Consult manual for important
cautionary information Warning: Crushing of hands / ngers
Warning: Hot surface Danger: Risk of Fire or Explosion. Flammable
refrigerant used
Warning: Shock / electrical hazard Refer to documentation

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 5
1.5 Avoiding Injury
• Do not use mechanical devices or other means to accelerate the defrosting process, other than those recommended by
the manufacturer.
• Do not damage the refrigerant circuit.
Review safety instructions before installing, using, or maintaining the equipment.
♦Before moving unit, ensure door is closed and casters (if installed) are unlocked and free of debris.
♦Before moving unit, disconnect the AC power cord and secure the cord.
♦Never physically restrict any moving component.
♦Avoid removing electrical service panels and access panels unless so instructed.
♦Keep hands away from pinch points when closing the door.
♦Avoid sharp edges when working inside the electrical compartment and refrigeration compartment.
♦Ensure products are stored at recommended temperatures determined by standards, literature, or good
laboratory practices.
♦Proceed with caution when adding and removing product from the freezer.
♦Do not open multiple loaded drawers at the same time.
♦Use manufacturer supplied power cord only.
♦Avoid risk of ignition by using only manufacturer supplied components and authorized personnel when servicing the unit.
♦ Using the equipment in a manner not specied by the manufacturer may impair the protection provided by the equipment.
♦Ensure product is stored safely, in accordance with all applicable organizational, regulatory, and legal requirements.
♦ The freezer is not considered to be a storage cabinet for ammable or hazardous materials.
♦ Use caution when moving a stacked conguration.
REQUIRED: Decontaminate parts prior to sending for service or repair. Contact Helmer or your distributor for
decontamination instructions and a Return Authorization Number.
1.6 General Recommendations
General Use
Allow freezer to come to room temperature before switching power on.
During initial startup, high temperature alarm may sound while the freezer reaches operating temperature.
Initial Loading
Allow chamber temperature to stabilize at the setpoint before storing product.
Product Loading Guidelines
When loading your freezer, take care to observe the following guidelines:
♦Never load freezers beyond capacity.
♦Always store items within shelves or drawers.
♦ Temperature uniformity is maintained by air circulation, which could be impeded if unit is overlled, particularly at the top
or back. Ensure a minimum of 2" (50 mm) clearance is provided below the fan.
Note
Products stacked against back wall may obstruct air ow and a󰀨ect performance of unit.

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 6
2 Installation
2.1 Location
Keep all ventilation openings in the enclosure or, in the structure for building-in, clear of obstruction.
♦ Has a grounded outlet meeting the electrical requirements listed on the product specication label.
♦Is clear of direct sunlight, high temperature sources, heating vents, and air conditioning vents.
♦Upright units require a minimum of 8” (203 mm) above, and a minimum of 3” (76 mm) behind the unit for proper ventilation,
clearance, and feature access.
♦Undercounter units require a minimum of 3” (76 mm) of space behind the unit for clearance and feature access.
♦ Meets specied limits for ambient temperature and relative humidity as stated in the Product Specications section of
this manual.
2.2 Placement and Leveling
NOTICE
• To prevent tipping, ensure the casters (if installed) are unlocked and the door is closed before moving the freezer.
• To avoid damaging refrigerant tubing or risking refrigerant leak, use caution when moving or operating the unit.
• Use of leveling feet or casters is required.
Undercounter units only
• Do not sit, lean, push or place heavy objects on top surface of undercounter units.
• Do not lean on or push down on an open door or extended drawers.
1. Ensure door is secured and casters (if installed) are unlocked.
2. Move freezer into place. Lock casters if installed.
3. Ensure freezer is level.
Note
Helmer recommends the use of leveling feet and wall and oor brackets (PN 400472-2) for stabilization. Contact Helmer
Technical Service for parts and instruction.
2.3 Stacked Undercounter Units
NOTICE
• For stacked conguration, both units must have leveling feet installed.
• Back brace bars and front stabilizing brackets must be installed (Blue - PN 400821-1; Stainless Steel - PN 400821-2).
• When stacking units, place the heavier unit on the bottom.
• Do not open multiple loaded drawers at the same time.
• Do not lean on or push down on an open door or extended drawers.
Contact Helmer or your distributor for more information regarding the stacking kit and methods to secure both units to the wall
and/or oor.
2.4 AC Power Cord
Use only manufacturer supplied power cord.
Install power cord
If packaged with modular cord, insert plug securely into the freezer power receptacle prior to connecting to grounded outlet.

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 7
2.5 Temperature Probes
A probe bottle and container of propylene glycol have been provided with this unit. The propylene glycol is mixed with water
to create a solution which, when placed in the probe bottle, simulates the product stored in the freezer. The product simulation
solution temperature reects the product’s temperature during normal operation.
Notes
• Temperature probes are fragile; handle with care.
• Failure to ll probe bottle(s) or keep probe bottle(s) lled to the appropriate level may cause the chamber
temperature to display higher or lower than the actual temperature.
Primary Monitor Probe
The primary monitor probe bottle is located at the top left side of the freezer.
Upright probe bottle Undercounter probe bottle
Secondary Monitor Probe (upright i.Series models only)
The location of the secondary monitor probe varies based on the unit storage conguration.
Fill Temperature Probe Bottle
Notes
• Use approximately 4 oz. (120 mL) of product simulation solution (1:1 ratio of water to propylene glycol).
• Propylene glycol included in freezer box.
1. Remove probe(s) from bottle and remove bottle from bracket.
2. Remove cap and ll with approximately 4 oz. (120 mL) of product simulation solution.
3. Secure cap on bottle and place in bracket.
4. Replace probe(s), immersing at least 2” (50 mm) in solution.
Notes
• Upright access port is located on the top of the unit.
• Undercounter access port is located on the back of the unit.
Install Additional Probe Through Access Port
1. Peel back putty to expose the port.
2. Insert the probe through the port into the chamber.
3. Insert the probe into the bottle.
4. Replace putty, ensuring a tight seal.

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 8
2.6 Chart Recorder (if included)
Note
• For complete information, refer to the Temperature Chart Recorder Operation and Service Manual.
• If chart recorder has been operating on battery power, the battery should be replaced to ensure the back-up source has
proper charge.
The chart recorder has a back-up battery system enabling a period of continuous operation if power is lost. Battery life varies by
manufacturer as well as voltage level remaining. If full battery power is available, back-up power for the temperature chart recorder
is available for up to 14 hours.
Prior to use:
Place probe in bottle with primary monitor probe.
Set up and Operation
Access the chart recorder by pressing and releasing the door (i.Series models) or pulling door open (Horizon Series and
undercounter models).
Install battery
Connect the leads to the battery to provide back-up power to the chart recorder.

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 9
Install / Replace Chart Paper
Note
For accurate temperature reading, ensure the current time is aligned with the time line groove when the chart knob
is fully tightened.
1. Press and hold C button. When stylus begins to move left, release button. The LED ashes.
2. When stylus stops moving, remove chart knob then move knob up and away from chart paper.
3. Place new chart paper on chart recorder.
4. Gently lift stylus and rotate paper so current time line corresponds to time line groove.
5. Hold chart paper in place while making sure the chart knob is fully tightened. (Failure to fully tighten the knob can result in paper
slipping and losing time.)
6. Press and hold C button. When stylus begins to move right, release button.
7. Conrm stylus is marking on paper and stops at the correct temperature.
8. Calibrate chart recorder to match primary temperature if needed and close recorder door.
Power Supply
The temperature chart recorder uses AC power when the system is operating. If AC power fails, the recorder continues to record
temperature with back-up power provided by the nine volt battery.
♦The LED indicator glows green continually when main power is functioning and the battery is charged.
♦The LED indicator glows red continually when main power is functioning and the batteries is either not installed or needs to be
replaced.
♦ The LED indicator ashes red to indicated the recorder is receiving power only from the back-up battery.
♦ The LED indicator ashes during chart paper change mode.

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 10
3 i.Series®Operation
3.1 Initial Power-up
1. Plug the power cord into a grounded outlet that meets the electrical requirements on the product specication label.
2. Switch AC ON/OFF switch ON.
3. Switch back-up battery switch ON.
Notes
• For models equipped with optional Access Control, the back-up battery is turned ON with a key switch.
• The Start screen is displayed when the i.C3is powered on. The i.C3will take approximately 2-5 minutes to boot up.
Start screen
The language screen is displayed when the i.C3is powered on. Use the Language screen to select the i.C3display language.
Language screen
Note
English is the default language.
If an alarm sounds, temporarily mute the alarm by touching the Mute icon.
Home screen - alarm muted Mute icon
Note
Active alarms are displayed on the Home screen. If an alarm condition other than High Temperature occurs, refer to the
service manual for troubleshooting.
i.Series

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 11
3.2 Operation
Notes
• Refer to the i.C3User Guide for complete information regarding the i.C3User Interface.
• The i.C3Home screen displays temperature and alarm information, and provides icons to gain access to other
functions of the i.C3.
• After two minutes of inactivity, the screensaver will be displayed. To return to the Home screen, touch the screensaver.
Home screen Home screensaver (touch to return to Home screen)
3.3 Change Temperature Setpoint
Note
The Temperature Setpoint toggle button can be accessed from either the initial Settings screen or the Device Control
Settings screen.
>
> > Enter the Settings password. Select Temperature setpoints. Touch minus (-) or plus (+) on the spin box to change
the value.
Settings screen Device Control Settings screen
Notes
• Default Settings password is 1234.
• Default setpoint is -30.0 °C.
i.Series

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 12
3.4 Set Alarm Parameters
> > Enter the Settings password. Scroll down to select Alarm Settings. Touch minus (-) or plus (+) on spin box to set
each alarm parameter.
Settings screen
Alarms Settings screens
Alarm settings control the circumstances and timing of alarm condition indicators displayed on the i.C3 Home screen.
i.Series

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 13
3.5 Active Alarms
Home screen with active alarm
Table 1. Active Alarms
Alarm Description
Communication Failure 1 Communication lost between i.C3display board and control board
Communication Failure 2 Conguration le is corrupt or i.C3 is unable to access the conguration le
Communication Failure 3 Corrupt database
Compressor Probe Failure Probe not functioning properly
Compressor High Temperature Compressor temperature reading is above high temperature alarm setpoint
Control Probe Failure Probe not functioning properly
Evap Defrost Probe Failure Evaporator defrost probe not functioning properly
Drive Space Low SD card that holds downloadable data is approaching capacity
Drive Space Full SD card that holds downloadable data is full
Door Open Door is open beyond user-specied duration
Inverter Communication Failure Communication is lost between the i.C3control board and the VCC inverter
Low Battery Monitoring system backup battery voltage is low
No Battery Monitoring system backup battery voltage is decient
Power Failure Power to the unit has been disrupted
Primary Monitor Probe Failure Probe not functioning properly
Primary Probe High Temperature Primary monitor probe reading is above high temperature alarm setpoint
Primary Probe Low Temperature Primary monitor probe reading is below low temperature alarm setpoint
Secondary Monitor Probe Failure (if installed) Probe not functioning properly
Secondary Probe High Temperature (if installed) Secondary monitor probe reading is above high temperature alarm setpoint
Secondary Probe Low Temperature (if installed) Secondary monitor probe reading is below low temperature alarm setpoint
3.6 Mute Active Alarms
Audible alarms may be temporarily muted by touching the Mute icon. The delay duration can be set and changed by selecting
Sound Settings from the Settings screen. The duration may be set to any value from 1 - 60 minutes. The delay time remaining
will be displayed in the bottom right corner of the icon. If the alarm is still active after the mute delay has ended, the audible alarm
will sound.
Unmuted Muted
> > Enter the Settings password. Scroll down to select Sound Settings. Touch minus (-) or plus (+) on spin box to set
the mute duration.
i.Series

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 14
Table 2. Application Icon Table
Image Name Image Name Image Name Image Name
Home Temperature Graph PDF Download Cancel Test
Event Log Alarm Test Upload Save
Mute Information Logs Access Control Cancel
Reset Contact Information/
Contact Helmer Access Log Back Arrow
Zoom Information Display Brightness Defrost Cycle Scroll
i.C³ Applications Icon Transfer Defrost Log Temperature Graph
Forward/Back
Settings CSV Download Alarm Conditions Battery Power
i.Series

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 15
4 Min/Max Temperature Monitoring
The Min/Max temperature display provides the highest and lowest Primary Monitor probe temperature reading since the last
system reset (power-on event) or manually-initiated reset. Touch the Reset icon to the right of the display to manually reset.
Notes
• The Min/Max temperature display can be turned on or o󰀨 through Display Settings.
• Once the time reaches the maximum display of 999 hours and 60 minutes, the message will display “>999:60”, but
minimum and maximum temperatures will continue to be tracked.
i.Series

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 16
5 i.Series®Access Control (Optional)
Allows user-specic secure access to the freezer.
Notes
• During a power failure, the optional Access Control lock will remain locked until battery power is depleted or until the
back-up battery key switch is switched OFF.
• Switching the back-up battery key switch OFF will disable the monitoring system during a power failure.
• During a power failure, switch the battery back-up switch OFF and use the mechanical door key to provide secure
storage for freezer contents.
• Refer to i.C3User Guide for complete information regarding Access Control.
5.1 Setup
Congure and manage user-specic accounts to allow controlled access to the freezer.
> > Access Setup
Access Control Setup password screen Access Control Setup screen
Enter the supervisor PIN to set up Access Control. Select the Add User button and follow the on-screen prompts to set up users.
Notes
• Initial factory supervisor PIN = 5625
• The supervisor PIN cannot be deleted, and should be changed to prevent unauthorized user ID setup. The supervisor
PIN does not allow access to the unit. At least one user ID must be set up to gain access to the unit.
5.2 Open Freezer with Access Control
Access Control keypad
Enter a valid PIN using the keypad.
i.Series

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 17
6 Horizon Series™ Operation
6.1 Initial Power Up
1. Plug the power cord into a grounded outlet that meets the electrical requirements on the product specication label.
2. Switch AC ON/OFF switch ON.
3. Remove the 9V battery from the literature box and install it.
4. Switch the Alarm ON/OFF key switch to ON.
5. Press Down Arrow (Mute) if high temperature alarm sounds.
Notes
• Failure to install the 9V battery will result in Er06 alarm.
• For models equipped with the optional Access Control, switch the back-up battery key switch ON.
• During a power failure, the back-up battery continues to provide power to the optional Access Control lock (if equipped).
If the back-up battery is not functioning, the optional Access Control lock will not secure the door.
• If an alarm condition other than High Temperature occurs, refer to the service manual for troubleshooting.
Horizon Series™ temperature monitor and control interface
6.2 Display Minimum and Maximum Monitor Temperature Recordings
The minimum and maximum recording feature allows the user to view a minimum temperature occurrence and a maximum
temperature occurrence within a given period of time. The timer provides a time reference in which those temperatures occurred.
View minimum temperature recording
1. Press and hold the Down Arrow button for 1 second and listen for a single beep.
2. The display will alternate between LO and a valid temperature value ve (5) times followed by a single beep to indicate
exit back to the temperature display.
View maximum temperature reading
1. Press and hold the Up Arrow button for 1 second and listen for a single beep.
2. The display will alternate between HI and a valid temperature value ve (5) times followed by a single beep to indicate
exit back to the temperature display.
Horizon Series
Door Open Lamp
Mute Button
High and Low Temp Lamps
LED Display
MODE Button
CONTROL and MONITOR Lamps
UP and DOWN Arrows SET Button
Temperature Unit Indicator

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 18
View recorded temperature timer
Notes
• The timer denotes the period of time that has elapsed. It does not display the time at which a minimum or maximum
temperature occurred.
• The maximum period of time the timer can record is 99:59 (99 hours and 59 minutes). The timer will reset automatically
when this maximum is reached.
1. Press and hold either the Up or Down Arrow button for 1 second.
2. While the display is ashing the HI or LO value, press and hold the SET button for 1 second.
3. The display will alternate ve (5) times between CLr and a value representing the number of hours and minutes that
have elapsed since the last recording (example: 12:47 would represent 12 hours and 47 minutes). A single beep will
follow to indicate exit back to temperature display.
Clear minimum and maximum temperature recordings.
1. Press and hold either the Up or Down Arrow button for 1 second.
2. While the display is ashing the HI or LO value, press and hold the SET button for 1 second and listen for a single beep.
3. While the display is ashing the elapsed time since last reset, press and hold the SET button for 2 seconds. CLr will be
displayed followed by a series of 3 beeps to indicate exit back to the temperature display.
Notes
The minimum and maximum temperature and timer will reset when:
• the unit is powered o󰀨 and battery back-up is not engaged, or
• after 99 hours and 59 minutes have elapsed.
Change Freezer Temperature Setpoint
Note
Default setpoint is -30.0 °C.
1. Press and release MODE to change to Control mode. The CONTROL lamp will illuminate.
2. Press and hold SET to display the current setpoint temperature.
3. Hold SET and press Up or Down Arrow as necessary to set the desired setpoint value.
4. Release all buttons; the setpoint is changed.
5. Press and release MODE to return to Monitor mode. The MONITOR lamp will illuminate.
Horizon Series

Helmer Scientic i.Series® and Horizon Series™ Freezer Instructions for Use
360416/B 19
6.3 Set Parameter Values
1. Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode.
2. The LED Display will show .C or .F to indicate Celsius or Fahrenheit.
3. Press and release MODE button to scroll through the parameters.
4. Once the desired parameter is selected, press and hold the SET button while pressing the Up or Down Arrow to select
the desired value.
5. Release SET button. The new setting is saved.
6. Press and hold the Up and Down Arrows simultaneously for 3 seconds to exit program mode.
Note
Contact Helmer Technical Service to set Rail Limit values.
Table 3. Parameter Values
Parameter Visual Indicator Range Default
Celsius or Fahrenheit °C Lamp or °F Lamp ˚C, ˚F ˚C
High Temperature MONITOR Lamp & HIGH Lamp -40.0 to 40.0 (˚C); -40 to 104 (˚F) -20 °C
Low Temperature MONITOR Lamp & LOW Lamp -40.0 to 40.0 (˚C); -40 to 104 (˚F) -35 °C
Monitor Offset MONITOR Lamp -10.0 to 10.0 (˚C); -18 to 18 (˚F) Varies
Control Offset CONTROL Lamp -10.0 to 10.0 (˚C); -18 to 18 (˚F) Varies
Evaporator Defrost Offset MONITOR lamp & CONTROL lamp -10.0 to 10.0 (˚C); -18 to 18 (˚F) Varies
Upper Rail Limit CONTROL Lamp & HIGH Lamp 0.1 to 10.0 (˚C); 1 to 18 (˚F) 0.7 °C
Lower Rail Limit CONTROL Lamp & LOW Lamp 0.1 to 10.0 (˚C); 1 to 18 (˚F) -0.7 °C
6.4 Set Temperature Units
Note
If temperature units are changed, the temperature setpoints, o󰀨sets and alarm settings must be recalibrated.
1. Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode.
2. The LED will display .C or .F to indicate Celsius or Fahrenheit.
3. Press and hold the SET button while pressing the Up or Down Arrow to select the desired temperature unit.
4. Release SET button. The new setting is saved.
5. Press and hold the Up and Down Arrows simultaneously for 3 seconds to exit program mode.
6.5 Set Alarm Setpoints (Parameters)
1. Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode.
2. The LED Display will show .C or .F to indicate Celsius or Fahrenheit.
3. Press MODE until HIGH TEMP or LOW TEMP and MONITOR lamps ash.
4. Hold SET, then press Up or Down Arrow to change the setpoint.
5. Release SET button. The new setting is saved.
6. Press and hold Up and Down Arrows simultaneously for 3 seconds to exit program mode.
6.6TemperatureCalibrationO󰀨sets
Temperature calibration o󰀨sets indicate an acceptable margin of error between the actual temperature value and the desired
temperature value.
Monitor Oset
♦Value is factory-set to match a calibrated reference thermometer.
♦ Refer to the service manual for instructions regarding changing the Monitor O󰀨set.
Horizon Series