Freezer Start-Up; Set Operating Temperature - Thermo Scientific Fisher Scientific 900 Series Operating And Maintenance Manual

Section 1
Installation and Start-Up

Freezer Start-Up

Set Operating
Temperature
1-8 Model 900 Series
With the freezer properly installed and connected to power, system set
points can be entered. The following set points can be entered in Settings
mode: Control temperature, high temperature alarm set point, low
temperature alarm set point, and (optional) BUS set point. Default settings
are shown in the table below.
Table 1-2. Default Settings
Default Settings
Control Set Point
High Temperature Alarm
Low temperature alarm
Optional BUS Set Point
Note If the set point is changed and the low temperature and high
temperature alarms are set 10° from the set point, the alarm set points will
be adjusted automatically to maintain a distance of at least 10° from set
point. ▲
Model 900 Series freezers have an operating temperature range of -50°C to
-86°C, depending on ambient temperature. The freezer is shipped from the
factory with a temperature set point of -80°C. To change the operating
temperature set point:
1. Press the Mode key until the Set Temperature indicator lights.
2. Press the up/down arrow key until the desired temperature set point is
displayed.
3. Press Enter to save the set point.
4. Press the Mode key until the Run indicator lights for Run mode
If no keys are pressed, the freezer will automatically return to RUN mode
after 5 minutes.
Note If the set point is changed and the low temperature and high
temperature alarms are set 10° from the set point, the alarm set points will
be adjusted automatically to maintain a distance of at least 10° from set
point. ▲
Temperature
-80°C
-70°C
-90°C
-60°C
Thermo Fisher Scientific