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12 Alarm Systems
12.1 Operating the
12.2 Local and Remote
22
Installation and Operation
The alarm system is designed to provide visual and audible warning signals
Alarm
for both power failure and rise in temperature. The alarm is equipped with a
battery backup.
The factory default warm alarm setpoint is 5.5
setpoint is 1.5
The alarm system is activated only when the key switch is turned to the
Alarm On position. The audible warning signal sounds when there is a
power failure or temperature alarm condition, or when the door is ajar for
more than 3 minutes.
The Mute function (pressing the Scan button) allows you to turn off the
audio warning without turning off the visual indicators.
To turn off and reset flashing visual alarms, press
There is also a ringback function after approximately 6 minutes if any alarm
condition remains active.
Blood bank units can have either a factory-installed local alarm or an
Alarms
optional user-installed remote alarm. Operating and testing procedures are
the same for both types of alarm.
The maximum distance between a blood bank and a remote alarm depends
on the wire gauge used. Refer to Table 5 below:
Table 5: Wire Gauges and Distance to Remote Alarm
Wire Gauge
20
18
16
14
12
º
C.
Total Wire Length (feet)
530
840
1,330
2,120
3,370
Thermo Scientific Recvo Blood Bank Refrigerators
Alarm Systems
º
C; the default cold alarm
and
simultaneously.
Distance to Alarm 1/2 Wire
Length (feet)
265
420
665
1,060
1,685
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