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2.
Microwave Heat Distribution-Heat Evenness.
The microwave
heat distribution can be checked by indir-
ectly measuring the water temperature rises at certain po-
sition in the oven as directed below.
(1) Prepare five beakers made of 'Pyres' and having 100 cc
Capacity each.
(2) Measure exactly
100cc of water
load with use of a
measuring cylinder and pour it into each beaker.
(3) Measure
the temperature
of each water
load.
(The
readings shall be taken to one place of decimals.)
(4) Put each beaker in place on the cooking tray as illus-
trated in Fig. 26 and start heating.
(5) After heating 2 minutes, measure the temperatures of
water in each beaker.
(6) Calculate the temperature
difference for each water
load to get the heat distrubution rate by the following
formula.
Minimum
temperature rise
Maximum
temperature rise
Heat distribution rate =
x 100%
The result should exceed 65 %.
Five 100 cc Beakers
Front End
Fig. 26
| ER-1010ETE |
3.
Electrical Continuity Check of Interlock Switches
3.1 Procedure
NOTE:
Remove
the power
plug from the wall receptacle before
testing.
1.
Primary Interlock Switch
1)
Disconnect two connectors from primary interlock
switch.
2)
Connect the ohmeter leads between the terminals
of the primary interlock switch.
3)
Read the value of resistance between the termjnals
of the switch, when the door is opened, and when
the door, is closed.
2.
Secondary Interlock Switch
1)
Disconnect two connectors from secondary inter-
lock switch.
2)
Connect the ohmeter leads between the terminals
of the secondary interlock switch.
3)
Read the value of resistance between the terminals
of the switch, when the oven door is opened, and
when the oven door is closed.
3.2 Judgement
The value of resistance should be applied to the value speci-
fied below.
Push Cook
Button
Primary Interlock
Switch
Secondary Interlock
Switch
Interlock Monitor
Circuit
When value obtained is not acceptable, the switches should
be replaced or adjusted again.
—19—
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