Helmer Scientific i.Series
®
and Horizon Series
™
Refrigerator - Pass-Thru
Service and Maintenance Manual
360429/A
52
11.1 Alarm Tests
Alarms should be tested to ensure they are working correctly. The refrigerator has alarms for chamber temperature, power failure,
and door open (time).
Chamber Temperature Alarm Test
NOTICE
• Perform the low alarm test before the high alarm test to control the temperature more closely and complete the testing
more quickly.
• Before testing alarms, protect items stored in the unit from extended exposure to adverse temperature.
• Temperature probes are fragile; handle with care.
Test the Low Alarm:
1. Identify setting for low alarm setpoint.
2. Remove primary monitor probe from bottle or solid ballast.
3.
Immerse probe in glass filled with water that is approximately 4 °C.
4. Slowly add crushed ice to lower temperature.
5. When temperature reaches low alarm setting, an alarm will activate.
Test the High Alarm:
1. Identify setting for high alarm setpoint
2.
Immerse probe in glass filled with water that is approximately 4 °C.
3. Slowly add warm water to raise temperature.
4. When temperature reaches the high alarm setting, an alarm will activate.
5. Remove probe from warm water.
6. Place primary monitor probe in probe bottle immersing it at least 2” (50 mm), or place in ballast and secure with
thumbscrew taking care not to overtighten.
Power Failure Alarm Test
Note
During a power failure, the backup battery should continue to provide power to the monitoring system.
Test Power Failure Alarm
1.
Switch AC power switch OFF. Audible power failure alarm will activate by displaying “PoFF” (power off) and an audible
tone can be heard approximately every 30 seconds.
2. Switch AC power switch ON. Audible power failure alarm will cease and “PoFF” will clear from display.
Door Open Alarm Test
Note
Factory-set to three minutes and cannot be changed.
Test Door Open Alarm
1. Open refrigerator door and note time.
2.
After three minutes, audible alarm will activate and DOOR ALARM lamp will flash.
3.
Close refrigerator door. Audible door open alarm will cease and DOOR ALARM lamp will stop flashing.
Horizon Series
