MVE Biological Systems
TEC 3000 Operating and Maintenance Freezer Manual
13289499 Rev H •
49
7.2.1.3. Temperature Alarm Settings
This section describes how to navigate and adjust the temperature alarm settings. The
high temperature alarm is used to alert the user when the temperature in the freezer
space has risen above the set threshold. The low temperature alarm can be used as a
calibration error or redundant overfill indicator.
To be used as a calibration error indicator, the low temperature alarm would be set to a
temperature slightly colder than the LN2 saturation temperature. Since the temperature in
the freezer storage space can never be colder than LN2, if this alarm is triggered, it is an
indication that the sensor requires recalibration.
To be used as a redundant overfill, or high level alarm, the low temperature alarm would
be set to a temperature slightly warmer than the LN2 saturation temperature and the
sensor placed higher than the desired liquid level in the freezer. If the low temperature
alarm is triggered, then it is an indication that sensor is submerged in LN2 and the liquid
level is higher than desired.
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 “ENTER”
The display will read “Temp A Menu”.
NOTE: To access Temp B Menu, press “SETUP”
instead of
“ENTER”.
4. Press “ENTER”
The display will read “Temp A Enabled”.
5. Press “SETUP”
Until the display reads “Temp A High Alarm”.
Use the “▲/▼” keys to adjust setting and press
“ENTER” to save the change.
6. Press “SETUP”
The display will read “Temp A Low Alarm”.
Use the “▲/▼” keys to adjust setting and press
“ENTER” to save the change.
Alarm masks added for Low and High Temperature
alarms for both sensors A and B. This allows these
alarms to be enabled or disabled by the user. Note these
are called alarm masks because the alarms are not
actually disabled. They are simply no longer indicated via
audio/visual means. The text in the menu screens uses
enable and disable since that is the more conventionally
understood terminology. Feature is available with
Firmware 2.03
Higher User Level
Required use ▲▼ to
ENTER Password
0000
Press ENTER for
Temperature Menus
or press SETUP for
next menu
Press ENTER for
Temp A Menu
or press SETUP for
next menu
Temp A
ENABLED
Use ▲▼ to adjust
Press ENTER to save
Temp A High Alarm
-110.0 °C
Use ▲▼ to adjust
Press ENTER to save
Temp A Low Alarm
-200.0 °C
Use ▲▼ to adjust
Press ENTER to save
Содержание MVE 1842P-150
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