TEC 3000 Operating and Maintenance Freezer Manual
7.3.1.1.
Single Point Calibration
The single point calibration procedure requires a small volume of LN2; enough to
completely submerge the end of the temperature sensor. It may be possible to use the
LN2 in the freezer space if the probe length permits.
1. Press “SETUP”
Controller will prompt for a password. 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”.
Press “SETUP” for Temp B.
4. Press “ENTER”
The display will read “Temp A”.
5. Press “SETUP”
Until the display reads “Temp A Calibration”.
6. Press “ENTER”
The display will read “Calibration Type”. Use the “▲/▼”
keys to adjust to “SINGLE POINT”.
7. Press “ENTER”
The display will read “Temp A Calibration”. Completely
submerge the sensing end of Temp probe A in LN2.
8. Press “ENTER”
The display will read “Wait for Temp A to stabilize”. Wait
for the displayed Temp A reading to stabilize while the
probe is submerged in LN2 before pressing “ENTER”.
9. Press “ENTER”
The display will read “Probe A single point calibration
complete”.
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
Press ENTER to
Temp A Calibration
or press SETUP for
next menu
Calibration Type
SINGLE POINT
Use ▲▼ to adjust
Press ENTER for next
Temp A Calibration
Place Probe A in
LN2 and press
ENTER
Wait for Temp A to
stabilize then press
ENTER
Temp A -195.8 °C
Probe A single point
calibration complete
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