Control Panel
Thermo Fisher Scientific
Laboratory and Plasma Freezers
7
Table 1.
Thermometer display on control panel (setpoint
-30ºC)
When cabinet temperature exceeds the warm alarm setpoint, the top bar
of the thermometer flashes. When temperature is lower than the cold
alarm setpoint, the bulb flashes.When you are in programming mode
(described in Table 3) the thermometer shows the setpoint value you are
changing.
3.
Power failure — illuminated when the main power supply is
interrupted. In this case the audible alarm also sounds.
4.
Service required — illuminated when the controller is in service
programming mode or when simulated warm or cold alarm conditions
are failing to occur during an alarm test.
5.
Increase — used to increase setpoint values in programming mode and
for various display functions.
6.
Door ajar — illuminated when the freezer door is open, the alarm is
activated, and the key switch is turned to the alarm position).
7.
Battery low — illuminated when the backup battery is low.
8.
Decrease — pushbutton used to decrease setpoint values in
programming mode and for various display functions.
9.
Scan — pushbutton used to change the main display and for various
other functions.
10.
Audible alarm — illuminates during warm and cold alarm conditions.
For full descriptions of display, programming, and service functions, refer to
the following tables.
Bars displayed
Temperat
ure
Bars displayed
Temperature
bulb only
-34ºC
(cold
alarm)
6 bars
-28ºC
1 bar
-33
7 bars
-27
2 bars
-32
8 bars
-26 (warm alarm)
3 bars
-31
9 bars
-25
4 bars
-30
(setpoint)
10 bars
-24
5 bars
-19
