Helmer Scientific i.Series
®
and Horizon Series
™
Freezer - Undercounter
Service and Maintenance Manual
360417/A
8
2.4
Connect Back-Up Power
The monitoring system and chart recorder each have a back-up battery system enabling a period of continuous operation if power
is lost.
Battery life varies by manufacturer, voltage level remaining as well as whether optional Access Control is installed. Providing full
power is available, Access Control is not installed, and no battery-related alarms are active, back-up power for the monitoring
system is available for up to 20 hours (the Low Battery alarm will activate after approximately 18 hours of battery use). Providing
full power is available, back-up power for the monitoring system and optional Access Control system is available for up to
2.5 hours.
Before installing or replacing batteries, switch AC power and back-up battery switches OFF. Disconnect the freezer from
AC power.
Notes
• The optional Access Control system uses the monitoring system back-up battery for back-up power in the event of
power failure.
• The monitoring system will start on back-up battery power alone. If the freezer was not previously connected to AC
power and the back-up battery is switched on, the monitoring system will begin running on back-up battery power.
• If AC power is lost, the monitoring system will automatically disable some features to prolong back-up battery power.
Data collection will continue until back-up battery power is depleted.
The back-up battery is located below the chamber, behind the right side panel. The panel cover must be removed to access
the battery.
Monitoring system back-up battery.
2.5
Prepare for Monitoring
The back-up battery switch is switched OFF for shipping. Switch the back-up battery switch ON to provide the monitoring system
and optional Access Control system with back-up power in the event of AC power failure.
Temperature Probes
Notes
• Temperature probes are fragile; handle with care.
•
Failure to fill the probe bottle or keep the probe bottle filled to the appropriate level may cause the chamber
temperature to display higher or lower than the actual temperature.
• Remote probes may also be introduced through the existing port and immersed in existing probe bottle.
• External probes should not be routed into the chamber through the door opening as this may cause issues with the
door seal.
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.
The probe bottle should contain 4 oz. (120 mL) of product simulation solution (1:1 ratio of water to propylene glycol).
i.Series
