360077-1/O
77
Horizon Series™ - Blood Bank Models
16.8
Test Alarms
Test alarms to ensure they are working correctly. The refrigerator has alarms for chamber temperature,
compressor temperature, door open (time), no battery, and power failure.
NOTICE
Before testing alarms, protect items in the refrigerator from extended exposure to adverse
temperature.
16.8.1
Manual Chamber Alarm Test
NOTICE
Before testing alarms, protect items in refrigerator from extended exposure to adverse
temperature.
IMPORTANT
Perform the low alarm test before the high alarm test to control the temperature more
closely and complete the testing more quickly.
Obtain:
►
(2) 8 oz. (250 mL) glass half-full of chilled water
►
(1) glass filled with crushed ice
►
(1) 8 oz. (250 mL) glass half-full of warm water
NOTICE
Temperature probes are fragile; handle with care.
Test the low alarm:
1
Identify setting for low alarm setpoint.
2
Remove chamber temperature probe from bottle.
3
Immerse probe in chilled water.
4
While stirring probe in chilled water, add approximately one teaspoon (5 mL) of ice every 20 seconds.
Ensure probe is at the bottom of the glass.
5
When low temperature alarm activates, note the temperature on the Horizon Series display.
Test the high alarm:
1
Identify setting for high alarm setpoint.
2
While stirring probe in chilled water, add warm water so temperature increases 0.5 °C per minute.
3
When high temperature alarm activates, note the temperature on the Horizon Series display.
4
Remove probe from warm water.
5
Place temperature probe in probe bottle, immersing it at least 2” (50 mm).
