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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)

B (W )

600

650

700

750

800

850

900

950

1000

1050

1100

P = 4187 X

CAUTION

1. W ater load should be m easured exactly to 1 liters.
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)