ASTM F1317-98(2012)
(Test Method)Standard Test Method for Calibration of Microwave Ovens
Standard Test Method for Calibration of Microwave Ovens
ABSTRACT
This test method covers the apparatuses required, and standard procedures and calculations involved in the calibration of microwave ovens designed for both home and commercial use. It was developed for use in the evaluation of volatile and nonvolatile components of microwave susceptor packages. There are, however, no recognized standards by which to estimate bias of this test method.
SCOPE
1.1 This test method is applicable to microwave ovens designed for both home and commercial use. It was developed for use in the evaluation of volatile and nonvolatile components of microwave susceptor packages.
1.2 This test method was collaboratively evaluated with microwave ovens with nominal output ratings of 700 W.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
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Designation: F1317 − 98 (Reapproved 2012)
Standard Test Method for
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Calibration of Microwave Ovens
This standard is issued under the fixed designation F1317; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.3 Thermometer, readable to 60.5°C.
1.1 This test method is applicable to microwave ovens 3.4 Stopwatch.
designed for both home and commercial use. It was developed
for use in the evaluation of volatile and nonvolatile compo-
4. Procedure
nents of microwave susceptor packages.
4.1 Using the stopwatch, check the accuracy of the micro-
1.2 This test method was collaboratively evaluated with
wave oven timer. Timer should be accurate to within 2 %. If
microwave ovens with nominal output ratings of 700 W.
not, determine the settings necessary to ensure accuracy.
1.3 This standard does not purport to address all of the
4.2 Filla2Lbeaker with exactly 1000 mLof distilled water
safety concerns, if any, associated with its use. It is the
at 18 to 20°C. Record initial temperature of the water as T .
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responsibility of the user of this standard to establish appro-
4.3 Remove the thermometer and place the beaker in the
priate safety and health practices and determine the applica-
center of the microwave oven. If the oven has been used
bility of regulatory limitations prior to use.
recently, allow it to cool until it is at room temperature.
2. Referenced Documents
4.4 Microwave at full power for 2 min 3 s. The additional 3
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2.1 ASTM Standards:
s is to allow for the magnetron start up delay.
E691 Practice for Conducting an Interlaboratory Study to
4.5 Immediately after the power cycle completion, immerse
Determine the Precision of a Test Method
the thermometer in the water and vigorously stir. Measure the
F874 Test Method for Temperature Measurement and Pro-
temperature of the water. Record this temperature as T .
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filing for Microwave Susceptors
F1308 Test Method for Quantitating Volatile Extractables in
4.6 Repeat the measurements to obtain triplicate measure-
Microwave Susceptors Used for Food Products
ments of the temperature rise.
F1349 Test Method for Nonvolatile Ultraviolet (UV) Ab-
4.7 Once calibrated, this oven can be used for analytical test
sorbing Extractables from Microwave Susceptors
standards such as Test Methods F874, F1308, F1349, F1500,
F1500 Test Method for Quantitating Non-UV-Absorbing
and F1519.
Nonvolatile Extractables from Microwave Susceptors Uti-
lizing Solvents as Food Simulants 4.8 Recalibrate oven daily.
F1519 Test Method for Qualitative Analysis of Volatile
Extractables in Microwave Susceptors Used to Heat Food
5. Calculation
Products
5.1 Calculate the output, O, of the microwave oven in watts
using the following formula:
3. Apparatus and Reagents
O 5 34.9 T 2 T
3.1 Microwave Oven, as manufactured. ~ !
2 1
3.2 Beakers, 2 L. (Alternatively use a 2-Lpolystyrene foam where:
container.)
T = initial temperature of the water,° C, and
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T = final temperature of the water, °C.
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This test method is under the jurisdiction ofASTM Committee F02 on Flexible
5.2 Average the three output values and use this mean as the
Barrier Packaging and is the direct responsibility of Subcommittee F02.15 on
calibrated output wattage of the microwave oven.
Chemical/Safety Properties.
Current edition approved Nov. 1, 2012. Published November 2012. Originally
approved in 1990. Last previous edition approved in 2007 as F1317 – 98 (2007).
6. Report
DOI: 10.1520/F1317-98R12.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1 Report the following information:
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1.1 Mean and standard deviation of these values for
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. output wattage of the microwave oven.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F1317 − 98 (2012)
7. Precision and Bias intended to present a meaningful way of considering the
approximate precision of this test method.The data in Table 1
7.1 Seven laboratories participated in the collaborative
should not be rigorously applied to acceptance or rejection of
study, each using a microwave oven with a rated output of 700
microwave ovens, as those data are specific to the round robin
W. From the data submitted, the mean output calculated was
and may not be representative of other conditions. Users of this
686 W, with a within-lab coefficient of variation of 2.1 %, a
test met
...
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