Helmer Scientific i.Series
®
Ultra-Low Freezer
Service and Maintenance Manual
360173-A/C
6
2.4
Connect Back-up Power
The monitoring system has a back-up battery system, enabling a period of continuous monitoring if power is lost.
Battery life varies by manufacturer as well as voltage level remaining. Providing full power is available and no battery-related alarms
are active, back-up power for the monitoring system is available for approximately 20 hours (the Low Battery alarm will activate after
approximately 18 hours of battery use).
Notes
• The monitoring system and chart recorder (if equipped) will start on battery power alone. If the freezer was previously not
connected to AC power and the battery is switched on, the monitoring system and chart recorder will begin running on
battery power.
• If AC power is lost, the monitoring system will automatically disable some features to prolong battery power. Data collection
will continue until battery power is depleted.
• The back-up battery system does not operate the refrigeration system.
•
Use only a back-up battery which meets manufacturer specifications.
Monitoring system / Access control back-up battery
2.5 Prepare for Monitoring
The Ultra-Low freezer is equipped with a rechargeable 12 V lead acid sealed battery. The battery is located in the electrical
compartment, on the bottom left of the freezer and is switched off for shipping. Switch the battery on to provide the monitoring system
with back-up power in the event of AC power failure.
Temperature Sensor
The i.C
3
monitoring and control system obtains temperature readings from the chamber temperature sensor. The sensor is located on
the lower back wall of the chamber.
Chamber temperature sensor (located behind cover).
