Thermo Scientific 3881, Operating And Maintenance Manual

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If the alarm temperature probe fails these tests as shown in Chart 3-3, the
probe is either defective or has become unplugged from the circuit board
(Figure 2-4). Contact the Technical Services department at 1-888-217-
1790, if necessary.
Pressing the center button below the
display screen will silence the audible
alarm. Refer to Figure 3-8. However,
the alarm will ring-back in 30 minutes
if the alarm condition still exists.
Test the performance alarm battery by
turning off the unit or pulling the plug
from the electrical outlet. The audible
alarm should sound and the Power
Failure indicator should light. Allow
the alarm to continue for 5 to 10
seconds before returning power to the
unit.
If the alarm does not activate, replace
the battery with stock number
400116. Refer to Figure 3-9 and to the
installation instructions in Section 2.
Perform the alarm test at intervals recommended by the laboratory or the
bolld bank industry.
7033881 Blood Bank 3-7 Thermo Scientific
Section 3
Operation
If the probe tests fail
Silencing the Audible
Alarm
Figure 3-8.
Testing Performance
Alarm Battery
Figure 3-9.