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RADIATION PROTECTION SPECIAL STUDY NO. 42-053-71 MICROWAVE OVEN INSTRUMENTATION NARDA MODEL 8200

Bioeffects Seen

not clearly visible · 1972

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The Narda Model 8200 Mini-Surveyor is suitable for measuring microwave oven leakage with accuracy within acceptable limits when used properly.

Plain English Summary

Summary written for general audiences

Hand placement on the probe grip caused variations of less than a few percent, while improper placement produced erratic readings. The Model 8221 probe covers all current and proposed leakage standards (1.0, 5.0, and 10 mW/cm²) within its most accurate range.

Why This Matters

The evaluation was limited to a cursory analysis because only one unit was available for testing due to time constraints. A two-inch polyethylene spacer is required to maintain the probe at the proper distance from the oven door seal during measurements. The monitor is calibrated only at 2450 MHz, but this single frequency does not reduce its acceptability because 915 MHz ovens are rare in the Army. Probe burnout can occur if the antenna is inserted into high power density fields from ovens or radar, so careful handling is essential. The Model 8223 probe is not needed for oven testing because the 0-20 mW/cm² range of the Model 8221 already indicates when leakage exceeds 10 mW/cm².

Cite This Study
not clearly visible (1972). RADIATION PROTECTION SPECIAL STUDY NO. 42-053-71 MICROWAVE OVEN INSTRUMENTATION NARDA MODEL 8200.
Show BibTeX
@article{radiation_protection_special_study_no_42_053_71_microwave_oven_instrumentation_n_g5166,
  author = {not clearly visible},
  title = {RADIATION PROTECTION SPECIAL STUDY NO. 42-053-71 MICROWAVE OVEN INSTRUMENTATION NARDA MODEL 8200},
  year = {1972},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

In tests on 25-30 ovens, the Model 8200 readings did not differ from other instruments by more than 1 dB, which was within the instrumentation's accuracy.
Placing the hand on the probe grip caused variations of less than a few percent, but placing the hand off the grip or inserting the body into the field produced erratic readings.
The Model 8221 probe covers the 1.0, 5.0, and 10 mW/cm² standards within its most accurate range, making the Model 8223 probe unnecessary for oven testing.
The study recommended personnel training on proper use, equipping the field instrument with a two-inch spacer and two Model 8221 probes for backup, and establishing a periodic calibration program.