Panasonic NE-2157CR, NE-1757CR manual Procedure for Measuring Microwave Energy Leakage, Equipment

Page 33

NE-1257R/NE-1257CR / NE-1757R/NE-1757CR / NE-2157R/NE-2157CR / NE-1258

21 PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE

NOTE: The U. S. Government standard is 5 mW/cm2 while in the customer's home. 2 mW/cm2 stated here is our own voluntary standard. (1 mW/cm2 for Canada)

21.1. Equipment

Note before measuring.

1.Do not exceed meter full scale deflection. Leakage monitor should initially be set to the highest scale.

2.To prevent false readings the test probe should be held by the grip portion of the handle only and moved along the shaded area shown in Figure no faster than 1 inch/sec (2.5 cm/sec).

3.Leakage with the outer panel removed — less than 5 mW/cm2.

4.Leakage for a fully assembled oven with door normally closed — less than 2 mW/cm2 (1 mW/cm2 for Canada).

5.Leakage for a fully assembled oven [Before the latch switch

(primary) is interrupted] while pulling the door — less than 2 mW/cm2.

1.Pour 275± 15cc (9ozs ± 1/2oz) of 20 ± 5°C (68± 9°F) water in a beaker which has graduations to 600cc, and place in the center of the oven.

2.Set the radiation monitor to 2450MHz and use it following the manufacture's recommended test procedure to assure correct results.

3.When measuring the leakage, always use the 2 inch (5 cm) spacer supplied with the probe.

4.Tap the start pad or set the timer and with the magnetron oscillating, measure the leakage by holding the probe perpendicular to the surface being measured.

1.Measurement with the outer pane removed.

Whenever you replace the magnetron, measure for radiation leakage before the outer panel is installed and after all necessary components are replaced or adjusted. Special care should be taken when measuring around the magnetron.

2.Measurements with a fully assembled oven.

After all components, including outer panel are fully assembled, measure for radiation leakage around the door

periphery, the door viewing window, the exhaust opening and air inlet openings.

21.2.Record keeping and notification after measurement

1.After any adjustment or repair to a microwave oven, a leakage reading must be taken. Record this leakage reading on the repair ticket even if it is zero.

A copy of this repair ticket and the microwave leakage reading should be kept by repair facility.

2.Should the radiation leakage be more than 2 mW/cm2 (1 mW/cm2 for Canada) after determining that all parts are in good condition, functioning properly, and genuine replacement parts as listed in this manual have been used, immediately notify PHCC, PSC or PCI.

21.3.At least once a year, have the radiation monitor checked for calibration by its manufacturer.

33

Page 32 Page 34
Image 33
Page 32 Page 34
Contents Commercial Microwave Oven Contents Page Outline Diagram Operation Procedure Page Page Page Page Wiring Requirements Wiring Requirements and Power Source Voltage SelectionSchematic Diagram NE-1257R, NE-1258R Schematic Diagram NE-1257CR Schematic Diagram NE-1757R Schematic Diagram NE-1757CR Schematic Diagram NE-2157R Schematic Diagram NE-2157CR Wiring Diagram NE-1257R, NE-1258R Wiring Diagram NE-1257CR Wiring Diagram NE-1757R Wiring Diagram NE-1757CR Wiring Diagram NE-2157R Wiring Diagram NE-2157CR Description of Operating Sequence Variable power cooking controlCheck the grounding Confirm after repair Replacement of magnetrons Upper and Lower Disassembly and Parts Replacement ProcedureRemoval of Positive Lock connector Replacement of power supply circuit boardReplacement of upper antenna Replacement of floor shelf and lower antennaReplacement of temperature sensor Thermal protector Disassembly of door assembly Component Test Procedure Temp sensor Thermal protector Measurement of microwave output Measurements and AdjustmentsEquipment Procedure for Measuring Microwave Energy LeakagePage Troubleshooting Guide Exploded View and Parts List High Voltage Label Parts ListDoor Hook a Spacer a Door Assembly Escutcheon Base Assembly Packing and Accessories Wiring Material 30 REF. no Noise Filter U 29 REF. no L. V. Transformer U31 REF. NO. E2 P. C. Board U Digital Programmer Circuit Schematic DiagramPage Parts List

NE-1257CR, NE-1757CR, NE-2157CR specifications

The Panasonic NE-2157CR, NE-1257CR, and NE-1757CR are three professional commercial microwaves designed for robust food service operations. These models are widely appreciated for their versatility, efficiency, and user-friendliness, making them ideal for restaurants, cafes, and food trucks.

The NE-2157CR stands out with its powerful 1500 watts of cooking power, which ensures quick and uniform heating of various food items. It features a large 0.9 cubic feet internal capacity, allowing users to accommodate larger dishes. One of the key highlights of this model is its programmable memory with up to 20 customizable settings, which enables users to recall frequently used cooking times and power levels easily. The stainless steel exterior and interior ensure durability and ease of cleaning, while the touch control panel provides a simple interface for quick operation.

Next in the line is the Panasonic NE-1257CR, which offers a slightly lower power output at 1200 watts, making it a more compact option while still delivering impressive cooking results. With a capacity of 0.8 cubic feet, it is an excellent choice for smaller kitchens that require efficiency without sacrificing quality. Its easy-to-use interface allows for basic cooking functions, while the stainless steel construction guarantees longevity in busy environments.

Finally, the NE-1757CR is a middle ground between the two, featuring 1700 watts of cooking power and an internal capacity of 0.6 cubic feet. This model combines performance with a smaller footprint, making it a versatile choice for various commercial settings. Like its counterparts, the NE-1757CR includes programmable presets and a user-friendly control panel, offering consistent results with minimal effort.

All three models utilize Panasonic's advanced inverter technology, which provides consistent heat and eliminates cold spots. This technology allows for more precise temperature control and helps preserve the texture and moisture of food during cooking.

In summary, the Panasonic NE-2157CR, NE-1257CR, and NE-1757CR are all excellent options for commercial kitchens looking for reliable, efficient microwaves. With their robust construction, user-friendly controls, and advanced cooking technologies, these models cater to a wide range of food preparation needs, enhancing productivity in any food service operation.
Top Page Image Contents