i.Series and Horizon Series GX Freezer Ver D Instructions for Use Jan 2022

Document History Revision

Date

CO

Supersession

Revision Description

A

15 OCT 2020

15545

n/a

Initial release

B

8 MAR 2021

15909

B supersedes A

Updated content to include upright freezers.

C

9 JUL 2021

16176

C supersedes B

Added verbiage in appropriate sections to address -35°C setpoint in specific units. Updated overall exterior depth of upright units in Dimensions table.

D

25 JAN 2022

16229

D supersedes C

Added GFI/GFCI note to Placement and Leveling sections. Updated overall exterior width of upright Horizon units in the Dimensions table.

* Date submitted for Change Order review. Actual release date may vary.

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 Scientific. Helmer Scientific 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 Scientific considers only the most recent revision of this document to be valid.

Notices and Disclaimers Confidential / 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 Scientific products is expressly prohibited.

Copyright and Trademark Copyright © 2022 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 Scientific 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 Scientific 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 Scientific 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 Scientific 14400 Bergen Boulevard Noblesville, IN 46060 USA www.helmerinc.com

Part No. 360416/D

Helmer Scientific i.Series® and Horizon Series™ Freezer

Instructions for Use

Contents 1

2

3

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

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

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

6

5.1

Setup... 16

5.2

Open Freezer with Access Control... 16

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 Offsets... 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 Specifications... 22 8.1

9

Operating Standards... 22

Compliance... 24 9.1

Safety Compliance... 24

9.2

Environmental Compliance... 24

9.3

EMC Compliance... 24

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Helmer Scientific i.Series® and Horizon Series™ Freezer

360416/D

Instructions for Use

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Helmer Scientific i.Series® and Horizon Series™ Freezer

1

About this Manual

1.1

Intended Audience

Instructions for Use

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 A digital 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 scientific 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 Scientific 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:

360416/D

Warning: Consult manual for important cautionary information

Warning: Crushing of hands / fingers

Warning: Hot surface

Danger: Risk of Fire or Explosion. Flammable refrigerant used

Warning: Shock / electrical hazard

Refer to documentation

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Helmer Scientific i.Series® and Horizon Series™ Freezer

1.5

Instructions for Use

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.

1.6

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 specified 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 flammable or hazardous materials. ♦ Use caution when moving a stacked configuration. REQUIRED: Decontaminate parts prior to sending for service or repair. Contact Helmer or your distributor for decontamination instructions and a Return Authorization Number.

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. Helmer recommends a minimum 4 hours. 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 overfilled, 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 flow and affect performance of unit.

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Helmer Scientific i.Series® and Horizon Series™ Freezer

2

Installation

2.1

Location

Instructions for Use

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 specification 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 specified limits for ambient temperature and relative humidity as stated in the Product Specifications section of this manual.

2.2

Placement and Leveling NOTICE • Helmer does not recommend operating this unit on a GFI/GFCI outlet. • 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 floor brackets (PN 400472-2) for stabilization. Contact Helmer Technical Service for parts and instruction.

2.3

Stacked Undercounter Units NOTICE • For stacked configuration, 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 floor.

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.

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Helmer Scientific i.Series® and Horizon Series™ Freezer

2.5

Instructions for Use

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 reflects the product’s temperature during normal operation. Notes • Temperature probes are fragile; handle with care. • Failure to fill probe bottle(s) or keep probe bottle(s) filled 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 configuration. 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 fill 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.

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2.6

Instructions for Use

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.

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Helmer Scientific i.Series® and Horizon Series™ Freezer

Instructions for Use

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 flashes. 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. Confirm 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 flashes red to indicated the recorder is receiving power only from the back-up battery. ♦ The LED indicator flashes during chart paper change mode.

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3

i.Series® Operation

3.1

Initial Power-up

Instructions for Use

1. Plug the power cord into a grounded outlet that meets the electrical requirements on the product specification 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.C3 is powered on. The i.C3 will take approximately 2-5 minutes to boot up.

i.Series

Start screen The language screen is displayed when the i.C3 is powered on. Use the Language screen to select the i.C3 display 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. 360416/D

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3.2

Instructions for Use

Operation Notes • Refer to the i.C3 User Guide for complete information regarding the i.C3 User Interface. • The i.C3 Home 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.

3.3

i.Series

Home screen

Home screensaver (touch to return to Home screen)

Change Temperature Setpoint Note The Temperature Setpoint toggle button can be accessed from either the initial Settings screen or the Device Control Settings screen. >

> the value.

> Enter the Settings password. Select Temperature setpoints. Touch minus (-) or plus (+) on the spin box to change

Settings screen

Device Control Settings screen

Notes • Default Settings password is 1234. • Default setpoint is -30.0 °C. • For locations outside the U.S. and Canada, the default Temperature Setpoint for plasma freezers is -35.0°C.

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Helmer Scientific i.Series® and Horizon Series™ Freezer

3.4

Instructions for Use

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.

i.Series

Settings screen

Alarms Settings screens

Alarm settings control the circumstances and timing of alarm condition indicators displayed on the i.C3 Home screen.

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3.5

Instructions for Use

Active Alarms

Home screen with active alarm Table 1. Active Alarms Description

Communication Failure 1

Communication lost between i.C3 display board and control board

Communication Failure 2

Configuration file is corrupt or i.C3 is unable to access the configuration file

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-specified duration

Inverter Communication Failure

Communication is lost between the i.C3 control board and the VCC inverter

Low Battery

Monitoring system backup battery voltage is low

No Battery

Monitoring system backup battery voltage is deficient

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

i.Series

Alarm

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. 360416/D

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Instructions for Use

Table 2. Application Icon Table Image

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

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Name

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Instructions for Use

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.

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i.Series

Notes • The Min/Max temperature display can be turned on or off 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.

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5

Instructions for Use

i.Series® Access Control (Optional)

Allows user-specific 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.C3 User Guide for complete information regarding Access Control.

5.1

Setup

Configure and manage user-specific accounts to allow controlled access to the freezer.

> Access Setup

i.Series

>

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.

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Instructions for Use

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 specification 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.

SET Button

UP and DOWN Arrows

CONTROL and MONITOR Lamps

MODE Button

LED Display

High and Low Temp Lamps Door Open Lamp Temperature Unit Indicator

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.

Mute Button

Horizon Series

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 five (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 five (5) times followed by a single beep to indicate exit back to the temperature display.

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Helmer Scientific i.Series® and Horizon Series™ Freezer

Instructions for Use

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 flashing the HI or LO value, press and hold the SET button for 1 second. 3. The display will alternate five (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 flashing 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 flashing 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 off and battery back-up is not engaged, or • after 99 hours and 59 minutes have elapsed. Change Freezer Temperature Setpoint

Horizon Series

Notes • Default setpoint is -30.0 °C. • For locations outside the U.S. and Canada, the default Temperature Setpoint for plasma freezers is -35.0°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.

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Instructions for Use

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); -0.1 to -18 (˚F)

-0.7 °C

6.4 Set Temperature Units

Horizon Series

Note If temperature units are changed, the temperature setpoints, offsets 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 flash. 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 Offsets Temperature calibration offsets indicate an acceptable margin of error between the actual temperature value and the desired temperature value. Monitor Offset ♦ Value is factory-set to match a calibrated reference thermometer. ♦ Refer to the service manual for instructions regarding changing the Monitor Offset.

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