Whirlpool MH2175XSB Service Guide - Page 8

R.F. Leakage Test EQUIPMENT • Electromagnetic energy leakage monitor (NARDA 81 00B, HOLADAY H 1501 ). • 275 ±15 ML glass beaker. TEST On every service call, checks for microwave energy emission must be made according to the following manner. 1. Remove the cooking rack from the oven cavity, if the microwave oven is so equipped. 2. Place a 275 ±15 ML (9.3 oz.) glass of water in the center of the oven bottom. 3. Select "HIGH" cook power, turn the microwave oven on, and test for R.F. Ieakage at the following locations: a) Around the cabinet at the front. b) Around the door. c) Across the console panel. d) Horizontally across the door. e) Vertically across the door. f) Diagonally across the door. g) Across the air vents. h) Across the rear air vent. i) All lockseams. j) Weld at bottom. k) Bottom plate. I) Oven feet. 4. The scan speed is one inch per second. When checking for R.F. Ieakage, use an approved R.F. measuring device to ensure less than 4 mw/cm2 emission at 5 cm distance with a maximum scan rate of 2.54 cm/second, in compliance with U.S. Government Department of Health, Education and Welfare 21CFR1030, performance Standard for Microwave Ovens. A properly operating door and seal assembly will normally register small emissions, but they must be no greater than 4 mw/cm2 to allow for measurement uncertainty. NOTE: Enter leakage readings in BEFORE and AFTER spaces on the service document. All microwave ovens exceeding the emission level of 4 mw/cm2 must be reported to Dept. of Service for microwave ovens immediately and the owner should be told not to use the microwave oven until it has been repaired completely. If a microwave oven is found to operate with the door open, report to Dept. of Service, the manufacturer and CDRH* immediately. Also tell the owner not to use the oven. The interlock monitor switch acts as the final safety switch protecting the customer from microwave radiation. If the interlock monitor switch operated to blow the fuse when the interlocks failed, you must replace all interlock switches with new ones, because the contacts of those interlock switches may be melted and welded together. If safety interlock/monitor switch replacement, or adjustment, is required, you must reconnect the circuit, and perform a continuity check on the monitor circuit. All repairs must be performed in such a manner that microwave energy emissions are minimal. Address for CDRH is: Office of Compliance (HFZ-342) Center for Devices and Radiological Health 2098 Gaither Road Rockville, MD 20850 * CDRH: Center for Devices and Radiological Health, Food and Drug Administration. 1-4