Start Up; Operation - Thermo Scientific TSX Series Installation And Operation Manual

Backup System (Optional)

11.3 Start Up

11.4 Operation

44 Installation and Operation Manual
To activate the backup system:
1. Follow the instructions in Section 8 to power on the freezer and set
temperature and alarm set points.
2. Enter the backup set point and backup type on the Backup Setting
Screen below, which you can bring up by pressing the tank icon on the
Freezer Settings Screen (refer to Figure 12):
Figure 27. Backup Settings Screen
3. Press the check mark icon to confirm changes.
4. Turn on the CO or LN
2
When the backup system is in operation, you can view and reset parameters on
the settings screen).
Once the backup system has been activated, you can test it by pressing the Test
Injection button. The system will inject as long as you keep pressing.
The backup system can run for a minimum of 24 hours on battery power.
On average, a backup system in operation uses 8 to 10 lbs. per hour of CO
LN at an ambient temperature of 25°C. This rate will vary depending on
2
setpoint. load, ambient temperature and freezer size.
To ensure optimal sample protection, the backup system functions off an
independent probe located on the right side of the freezer.
supply.
2
Thermo Scientific TSX Ultra Low Temperature Freezers
or
2