Tunnel Pasteurizer - ABMI | Association of the Beverage Machinery

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Tunnel Pasteurizer - ABMI | Association of the Beverage Machinery
Quality
Method sheet: Tunnel pasteurizer
Sheet no.:
050501 – 1.04
Date:
February 2009
Machine:
Criteria:
Tunnel pasteurizer
Pasteurization unit in the processed package
Contents:
1.
Definition: Machine and Criteria .......................................................................................... 2
2.
2.1
2.2
2.3
Inspection .............................................................................................................................. 2
Scope ...................................................................................................................................... 2
Apparatus ................................................................................................................................ 2
Procedure ................................................................................................................................ 3
3.
3.1
3.2
Sampling ................................................................................................................................ 4
Calculation .............................................................................................................................. 4
Results and data sheets .......................................................................................................... 4
4.
4.1
4.2
Evaluation and Documentation ............................................................................................ 4
Evaluation ................................................................................................................................ 4
Documentation ........................................................................................................................ 4
"The information and data provided in this document are non-binding outlines of a suggested best practice by the
Association of the Beverage Machinery Industry (ABMI). It is your responsibility to assess whether it is feasible to use this
information for your own undertakings. The ABMI will not be held liable for the use of the information or data provided in
this document, or for the results of such use. Please see the Terms of Use on www.abm-industry.org for more details."
Page 1 of 4
Quality
Pasteurization units in the processed package
1.
Definition: Machine and criteria
One important parameter of a tunnel pasteurizer is the accuracy of the pasteurization units (PU) in
the processed package.
For all actions the relevant safety instructions must be strictly adhered to.
Further related documents:
•
•
Electronic thermograph user manual
DIN 8784
2.
Inspection
2.1 Scope
Detection of pasteurization units in pasteurized packages by means of an electronic PU
thermograph.
2.2 Apparatus
Electrical PU measuring system.
The recommended accuracy of the measurement system should be in following range:
Temperature: ±0.5°C or better. In a measurement range from 0°C to 100°C.
Frequency of measurement: minimum 60 cycles per minute.
The date storage should be minimum 120 readings.
A visual inspection of the used measurement devices by a person is necessary.
Page 2 of 4
Quality
2.3 Procedure
To detect the PU, always use an electronic PU thermograph with a high measuring accuracy.
The device should have two channels to measure the temperature in the package and the spray
temperature of the tunnel pasteurizer zones.
The measuring probe has to be adjusted to the reference point for PU calculation: 10 mm for cold
spot or 1/3 of filling height (DIN8784), measured from inner bottom surface of the package, located
on the vertical centreline of the container.
The filling height should be the same as indicated in the bottle’s reference drawing.
The measuring should always be executed with the same bottle or by using a standard bottle
which has the same diameter, weight etc. as the bottles in production.
The calculation of the PU in the tunnel pasteurizer and in the chosen measuring device has to be
done in the same way and with the same equation.
PU formula for beer:
PUbeer = z [min] . 1,393
(T [°C]-60°C)
PU formula for juice:
PUjuice = z [min] . 1,259
(T [°C]-80°C)
T = temperature in degree celsius
z = time in minutes
For measuring a testing fluid with the same characteristics as the product, e.g. water but without
CO2, is recommended.
The infeed temperature has to be the same as under production conditions.
Page 3 of 4
Quality
3.
Sampling
To check the layout PU values, the measuring has to take place at nominal machine capacity
without stoppages during the complete passage.
3.1 Calculation
The calculation is automatically done by the measuring device. The temperatures and the time are
recorded in the memory of the thermograph and the related PU are calculated. The results can be
shown on a computer after the measuring.
3.2 Results and data sheets
Free
4.
Evaluation and Documentation
4.1 Evaluation
The pasteurization units recorded by the measuring device at nominal machine capacity have to be
the same as those set in the control unit of the tunnel pasteurizer.
PU (Range min)
≤ PU Actual detected
≤ PU (Range max).
4.1 Documentation
PU are o.k.
PU are not o.k.
Name and signature of inspector:
Page 4 of 4

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