MEASUREMENT AND TEST
1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT
M icrowave output power can be checked by indirectly m easuring the tem perature rise of a certain am ount of water exposed
to the m icrowave as directed below.
PROCEDURE
1. M icrowave power output m easurem ent is m ade with the m icrowave oven supplied at rated voltage and operated at its
m axim um m icrowave power setting with a load of 1000 ± 5cc of potable water.
2. The water is contained in a cylindrical borosilicate glass vessel having a m axim um m aterial thickness of 3 m m and an
outside diam eter of approxim ately 190 m m .
3. The oven and the em pty vessel are at am bient tem perature prior to the start of the test. The initial tem perature of the
water is 10 ± 2 ° C (50 ± 3.6 ° F). It is m easured im m ediately before the water is added to the vessel. After addition of
the water to the vessel, the load is im m ediately placed on the center of the shelf, which is in the lowest norm al position.
4. M icrowave power is switched on.
5. Heating tim e should be exactly A seconds.
(Refer to table as following)
Heating tim e is m easured while the
m icrowave generator is operating at
full power. The filam ent heat-up tim e
for m agnetron is not included.
6. The initial and final tem perature of water is selected
so that the m axim um difference between the am bient
and final water tem perature is 5K.
7. The m icrowave power output P in watts is calculated
from the following form ula:
T is difference between initial and ending tem perature.
t is the heating tim e.
The power m easured should be B (Refer to SPECIFICATIO NS) W ± 10.0 % .
Heating time for power output:
A (second)
70
64
60
56
52
49
47
44
42
40
38
B (W )
600
650
700
750
800
850
900
950
1000
1050
1100
P = 4187 X
T
CAUTION
1. W ater load should be m easured exactly to 1 liter.
2. Input pow er voltage should be exactly specified voltage (R efer to S PE C IF IC AT IO N S ).
3. A m bient tem perature should be 20
± 2° C (68 ± 3.6 ° F)
