Durabrand M-500, Руководство по обслуживанию

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M-500
4. TEST INSTRUCTION
4.1 Microwaves creepage
Specification: the microwaves creepage – a distance of 50mm of the external
surface of the device could not exceed 1miliwatts for squared centimeters.
Experience: a (275 +/- 5) g load of potable water at (20 +/- 2) ºC temperature
inside a recipient of thin walls of borosilicate glass with diameter upper 85mm
is places at the horizontal support center, the device supplied with nominal
voltage and operated with controls adjusted to maximim power. The
microwaves meter is moved over the device surface with objective the locate
microwaves creepage.
The maximum creepage colud not exceed 1 miliwatts per squared
centimeters.
4.2 Output power measurement of microwaves
It must be utilized borosilicate recipient with external diameter of
aproximately 190mm and height of 90mm and thickness of 3mm.
At the begining of the experience, the oven and the recipient must be at
environment temperature. And used to the experince potable water with 10
+/- 1 ºC initial temperature. The water temperature is measured immediately
before to placed in recipient.
An amount of 1000 +/- 5g of water is added in recipient. The recipient is
placed at plate center of the oven. The device is supplied with nominal
voltage at the adjustment of maximum power. It must be placed the needed
time for that the water reach 20 +/- 2ºC. After the time finishing it leave the
recipient and it measured immediately.
Notas:
ü
The water is mixed before your temperature be measured.
ü
Device of mixing and measurement must have low
capability of heating.
ü
Specified power 800 Watts (IEC 705)
ü
Power tol15-10%
The output power of the microwaves is calculated by formulation:
P = (1/T) x [4,187 x Mw x (T2 – T1) + 0,55 x Mc x (T2 – T0)] / T
Where:
P = microwaves output in watts.
Mw = water mass in grammes.
Mc = recipient mass in grammes.
T0 = environment temperature in ºC.
T1 = water initial temperature in ºC.
T2 = water final temperature in ºC.