To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor
before servicing, unless testing requires it.
©2002 Maytag Appliances Company 16021520 Rev. 0 17
Operating Instructions for the Narda
8110B Radiation Monitor
Purpose of the monitor is to check radiation leakage
around the microwave oven door and other places
where radiation could possibly occur.
This instrument measures radiation leakage in
milliwatts per square centimeters (mW/cm
probe should be used with 2" (5cm) cone spacer.
Water load of 275 cc. (approximately 1
/3 cup), is to
be placed in the oven and used as a load during
Operate the instrument on its internal rechargeable
battery or a 115 or 230 V power supply. It may also be
charged from a 115 or 230 V 50 or 60 Hz power
source. “Meter Response” switch should be set on
fast position. Slow setting requires too long of a time
to register. “Alarm” control should be set on 50 which
sounds an audible alarm when the meter reads 50%
of full scale deflection. This is to provide warning
against high levels which may damage the instrument.
“Range” switch may be used on the lower or higher
meter scale. On an oven with an unknown leakage,
use high scale first. Switch to low scale for low
leakage. “Test” switch is used to check the battery
and probe. If either is faulty, meter needle will not read
above “Test Minimum” mark on the meter. Zero
control is used to zero the needle.
With probe and cone spacer plugged into the
instrument, turn monitor on-off switch to the on
position. Check battery and probe “Test” switch. If
battery reading does not come up to “Test Minimum”
setting, plug in AC cord. If probe test fails, do not use
During usage, if probe becomes inoperative or
disconnected, audio alarm will come on.
Test probe must be held by the grip portion of the
handle, otherwise false reading may result if operators
hand is between the handle and probe.
Hold probe perpendicular to cabinet door. Place cone
of probe on the door and/or cabinet-door seam and
move along the seam. If leakage of the oven is
unknown, move probe slowly. Any time the audible
alarm sounds proceed with care in order not to
exceed a full scale reading of the meter or remove the
probe from the area of leakage. When testing near a
corner or access area of the door, keep probe
perpendicular to the areas making sure the probe end
at the base of the cone does not get closer than 2”
(5cm) to any metal. If it does, an erroneous reading
Always use the 2” (5cm) spacer with probe. Also,
always proceed carefully in areas of high leakage or
the probe can be accidentally burned-out. Rotating
stirrer causes high peaks of energy. Although meter
has averaging capabilities, probe will react
instantaneously to peak power changes which will
If oven is likely to have a large amount of leakage
approach the oven slowly with the probe, while
observing meter. This is achieved by holding probe
two or three feet from the oven and then moving
toward oven surface or gap between the door and
oven body while observing meter. When high leakage
is expected, do not move probe horizontally along the
oven surface, this could cause possible probe burn-
out. Greatest leakage is generally found at the
corners. After maximum leakage is established to be
within the meter scale range, then probe may be
moved horizontally around door surface.
NOTE: For further information see Amana Service
Letters of the R-10, R-35, and R-59 Series
and your Narda 8110B Instruction Manual.