Calibration
Operation
The calibration is done
by placing hot water in the Heat-Box and afterwards register the decay of the
temperature.
The calibration
procedure should take place in a room where the temperature is not changing
more than ±
For acclimatization,
the Heat-Box should be placed in the room 8 hours before operation, with the
lid open.
1.
Initialize the datalogger as described here.
2. Disconnect
the datalogger from the PC.
3. Connect the
thermocouple with long cord to terminal 1 and the other one to terminal 2.
4. Attach the
data logger on the front plate using the pre-mounted Velcro fastener.
5. Lead the blue
cord to the void at the front panel. Fix the cord to avoid squeezing, by means
of the tapes.
6. Place the thermocouple
inside the brass spear mounted on the bracket provided, with its soldering at
the closed end.
7. Weigh the
empty can (container).
8. Pour water
into the can. The water temperature should be about 25 °C (45 °F) above the
room temperature.
9. The total
weight should be determined (water and can).
10. Place the
closed end of the spear app. at the centre of the can, using the bracket.
ATTENTION!
Try to perform the next 3 steps as quickly as
possible.
It is important to use the start button instead of just using a data
logger which already is running. This ensures that the initial time and
temperature is correct.
11. Place the can in the Heat-Box by means of the
lifting belt.
12. Press the
“Go”-button on the datalogger until the display shows “Record” after app. 3
seconds.
13. Close the
lit of the Heat-Box. Do not squeeze the cord or the
lifting belt.
14. The display
of the datalogger is showing the temperature of the water.
15. The
measuring can be finished when the display is showing that the temperature has
fallen
Analysis
of measuring in relation to calibration
Launch the
Heat-Box software from Start-All Programs-Heat-Box Heat-Box.bat.
Select the
id-number of the Heat-Box you want to work with.
Then the window in
figure 4 will appear. Some of the buttons are dimmed (inactive) until the first
calibration/determination has been performed.
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Figure 4 |
Click on the Calibration button and the window
in figure 5 will appear:
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Figure 5 |
Measuring data from the datalogger must be
placed on the clipboard as described here.
In order to load measuring data, go to this.
When measuring data has been loaded, Figure 6:
- Fill in
the weight of the sample including the can
- Fill in
the weight of the can
- Press
the calibration button
- The
calibration will last some minutes. During calibration is shown how the
calculation model is fitting to the measured data.
- When
the calibration is completed, you will have the opportunity to assess
whether the simulated temperature course is in appropriate accordance with
the measured. If so, save the calibration and then print a sheet for your
archive. The sheet is as shown here.
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Figure 6 |
