Helmer Scientific i.Series
®
and Horizon Series
™
Refrigerator - Pass-Thru
Service and Maintenance Manual
360429/A
40
9.3
Connect Backup Power
The monitoring system has a backup battery system, enabling a period of continuous operation if power is lost.
Battery life varies by manufacturer as well as voltage level remaining. Providing full battery power is available, backup power for
the monitoring system is available for up to two hours.
NOTICE
Before installing or replacing batteries, switch main power OFF and disconnect refrigerator from AC power.
Note
• The monitoring system will start on backup battery power alone. If the refrigerator was not previously connected to AC
power and the backup battery is connected, the monitoring system will begin running on battery power.
• If AC power is lost, the monitoring system will automatically disable some features to prolong backup battery power.
Data collection will continue until backup battery power is depleted.
The backup battery is located on the top of the refrigerator.
Monitoring system backup battery
9.4
Prepare for Monitoring
Monitoring system backup battery is included in the accessories box, or installed on the unit but not connected. Install and connect
the battery and switch the audible alarm key switch to ON to provide monitoring system with backup power and alarm capability in
the event of AC power failure.
Temperature Probes
Notes
• Temperature probes are fragile; handle with care.
• Remote probes may also be introduced through the existing top or side (if included) ports, and immersed in existing
probe bottles.
• External probes should not be routed into the chamber through the door opening as this can cause issues with the
door seal.
• A solid ballast (if installed) should be placed in the bracket in a horizontal position in single door (226) models.
The optional secondary probe should be placed in a vertical position.
The location of probes varies by model. External probes may be introduced through the existing top port or through a side access
port which is available in some models.
A solid ballast or probe bottle and container of glycerin have been provided with this unit. When using the probe bottle, mix the
glycerin with water to create a solution which simulates the product stored in the refrigerator. The product simulation solution
temperature reflects the product’s temperature during normal operation.
The probe bottle should contain 4 oz. (120 mL) of product simulation solution at a 10:1 ratio of water to glycerin.
Primary monitor probe
Primary monitor probe Solid Ballast
(226 models)
(458 models)
Horizon Series
