MVE Biological Systems
TEC 3000 Operating and Maintenance Freezer Manual
13289499 Rev H •
82
7.3.1.2. Two Point Calibration
The two point calibration procedure requires a small volume of LN2 and an ice water
bath; enough to completely submerge the end of the sensor. Proper ice water bath
preparation is imperative to ensure accuracy. It is best to add filtered water to a
Styrofoam cup containing crushed ice. Allow the solution to stand at room temperature
for five minutes prior to beginning procedure.
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 “Two 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.
9. Press “ENTER”
The display will read “Remove Probe A from LN2”.
Remove the temperature sensor from the LN2.
10. Press “ENTER”
The display will read “Wait while probe warms to room
temperature”. Wait while the temperature sensor warms
to room temperature and the controller counts down.
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
TWO 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
Remove Prove A from
LN2 and press
ENTER
Wait while probe
warms to room
temperature
180 seconds
Содержание MVE 1842P-150
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