Standard Test Method for Calibration of Microwave Ovens

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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Historical
Publication Date
09-Oct-1998
Current Stage
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ASTM F1317-98(2002) - Standard Test Method for Calibration of Microwave Ovens
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F1317–98 (Reapproved 2002)
Standard Test Method for
Calibration of Microwave Ovens
This standard is issued under the fixed designation F 1317; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.4 Stopwatch.
1.1 This test method is applicable to microwave ovens
4. Procedure
designed for both home and commercial use. It was developed
4.1 Using the stopwatch, check the accuracy of the micro-
for use in the evaluation of volatile and nonvolatile compo-
wave oven timer. Timer should be accurate to within 2 %. If
nents of microwave susceptor packages.
not, determine the settings necessary to ensure accuracy.
1.2 This test method was collaboratively evaluated with
4.2 Filla2Lbeaker with exactly 1000 mLof distilled water
microwave ovens with nominal output ratings of 700 W.
at 18 to 20°C. Record initial temperature of the water as T .
1.3 This standard does not purport to address all of the
4.3 Remove the thermometer and place the beaker in the
safety concerns, if any, associated with its use. It is the
center of the microwave oven. If the oven has been used
responsibility of the user of this standard to establish appro-
recently, allow it to cool until it is at room temperature.
priate safety and health practices and determine the applica-
4.4 Microwave at full power for 2 min 3 s. The additional 3
bility of regulatory limitations prior to use.
s is to allow for the magnetron start up delay.
2. Referenced Documents 4.5 Immediately after the power cycle completion, immerse
the thermometer in the water and vigorously stir. Measure the
2.1 ASTM Standards:
temperature of the water. Record this temperature as T .
E 691 Practice for Conducting an Interlaboratory Study to
4.6 Repeat the measurements to obtain triplicate measure-
Determine the Precision of a Test Method
ments of the temperature rise.
F 874 Test Method for Temperature Measurement and Pro-
4.7 Once calibrated, this oven can be used for analytical test
filing for Microwave Susceptors
standards such asTest Methods F 874, F 1308, F 1349, F 1500,
F 1308 Test Method for Quantitating Volatile Extractables
and F 1519.
in Microwave Susceptors Used for Food Products
4.8 Recalibrate oven daily.
F 1349 Test Method for Nonvolatile Ultraviolet (UV) Ab-
sorbing Extractables from Microwave Susceptors
5. Calculation
F 1500 Test Method for Quantitating Non-UV-Absorbing
5.1 Calculate the output, O, of the microwave oven in watts
Nonvolatile Extractables from Microwave Susceptors Uti-
using the following formula:
lizing Solvents as Food Simulants
F 1519 Test Method for Qualitative Analysis of Volatile O 5 34.9 ~T 2 T !
2 1
Extractables in Microwave Susceptors Used to Heat Food
where:
Products
T = initial temperature of the water,° C, and
T = final temperature of the water, °C.
3. Apparatus and Reagents 2
5.2 Average the three output values and use this mean as the
3.1 Microwave Oven, as manufactured.
calibrated output wattage of the microwave oven.
3.2 Beakers, 2 L. (Alternatively use a 2-Lpolystyrene foam
container.)
6. Report
3.3 Thermometer, readable to 60.5°C.
6.1 Report the following information:
6.1.1 Mean and standard deviation of these values for
output wattage of the microwave oven.
This test method is under the jurisdiction ofASTM Committee F02 on Flexible
Barrier Materials and is the direct responsibility of Subcommittee F02.15 on
Chemical/Safety Properties. 7. Precision and Bias
Current edition approved Oct. 10, 1998. Published January 1999. Originally
7.1 Seven laboratories participated in the collaborative
approved in 1990. Last previous edition approved in 1997 as F 1317 – 90
...

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