Alarm Systems
Thermo Fisher Scientific
Laboratory and Plasma Freezers
15
Alarm Test Procedure
Note
: This test automatically advances through all steps and stops.
1.
Verify that the key position is in the Alarm On mode, and that the
current warm and cold alarm setpoints are within normal ranges (the
warm and cold simulations may not work if the setpoints are set to
extreme values).
2.
To start the alarm test, press and simultaneously. During the test
the main display and thermometer bulb will indicate simulated (not
actual) cabinet temperature.
3.
When simulated temperature exceeds the warm alarm setpoint, the
alarm sounds and the alarm icon on the control panel illuminates (#10
in Figure 2 on page 8).
4.
The temperature display begins to drop. After a few seconds, the
temperature in the display is back in the operating range.
5.
The alarm stops. The temperature on the display drops until the cold
alarm sounds.
6.
The test is now complete but the alarm continues to sound until the
temperature on the display is back in the operating range.
If the simulated alarm conditions do not occur during the first five minutes
of the alarm test, the service (wrench) icon illuminates and the test is
terminated. You can also terminate the test immediately by turning the key
switch to the second (Power On) position. When during the alarm test, the
temperature display does not change or the service icon illuminates, check
the sensor connections.
After an alarm test has terminated, there is a 10-minute delay before the test
can be run again.
