MVE Biological Systems
TEC 3000 Operating and Maintenance Freezer Manual
13289499 Rev H •
54
7.2.2.3. Level Offset
Since the annular line that carries the pressure level signal to the TEC 3000 is not located at
the very bottom of the LN2 column, a Level Offset is needed. This value is determined and set
at the factory and should not be adjusted to fix an inaccurate level reading unless setting up a
freezer (see the First Fill Startup Procedure) or if instructed to do so by an authorized MVE
Distributor or Technical Service. For liquid level calibration see section 7.3.2 page 84.
Note: Security Level 3 or higher is required to adjust the Level Offset.
1. Press “SETUP”
Controller will prompt for a password. A flashing cursor
on the entry screen will make it clear which digit is being
changed. Use the “▲/▼” keys to scroll to the
appropriate number. Press “ENTER” to advance the
cursor to the next position.
2. Press “ENTER”
The display will read “Temperature Menus”.
3. Press “SETUP”
Until the display reads “Liquid Level Menus”.
4. Press “ENTER”
The display will read “High Level Alarm”.
5. Press “SETUP”
Until the display reads “Advanced Level Menus”.
6. Press “ENTER”
The display will read Auto Fill Control”
7. Press “SETUP”
The display will read “Level Offset”. Use the “▲/▼” keys
to adjust value and press “ENTER” to save the change.
Higher User Level
Required use ▲▼ to
ENTER Password
0000
Press ENTER for
Temperature Menus
or press SETUP for
next menu
Press ENTER for
Liquid Level menus
or press SETUP for
next menu
High Level Alarm
8.0 in
Use ▲▼ to adjust
Press ENTER to save
Press ENTER for
Advanced Level menus
or press SETUP for
next menu
Auto Fill Control
ENABLED
Use ▲▼ to adjust
Press ENTER to save
Level Offset
1.3 inches
Use ▲▼ to adjust
Press ENTER to save