DATREND Systems vPad-TI, Руководство по эксплуатации

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vPad-TI OPERATING MANUAL
Noise Sound Level
The
Noise or Normal Sound Level
(
NSL
) [clause 201.9.6.2.1.101 of the standard] requires that
the sound pressure level (A weighted) shall be measured at a position of 10-15 cm above the center
of the mattress, with a sound pressure level meter complying with Type III requirements of IEC
Publication 651. This test has 2 components, a background sound level (
BSL
) which is recorded at
the start of the overall test, before the incubator is powered ON, and the NSL measurement which
is measured with the incubator operating at a Control Temperature of 36 °C at maximum humidity.
The values of both
NSL
and
BSL
are recorded, with
BSL
at least 10 dB below
NSL
; and,
NSL
should not exceed 60 dB in the baby compartment.
The result of this test generally represents the amount of the noise generated by the incubator’s air
circulation system.
Air Flow Measurements
The flow of air in the baby incubator is measured in terms of Air Velocity ( AV ) [clause
201.12.1.111], and is measured at positions Tb, Tc, Td and Te. The
AV
at any of the specified
points shall not exceed 0.35 m/s. This test is performed before the temperature testing is started.
During the test the airflow sensor must be moved to the appropriate position(s) as prompted by the
software.
Warm Up Time
It is the expectation that the temperature profile in the infant incubator will generally follow the
graph as shown in Figure 24. The first component of the profile is called the
Warm Up Time ,
(
WT
) and the test requirements are defined in the Standard [clause 201.12.1.107].
The Warm-up Time is only relevant if the Incubator Temperature is at least 12 o C below the Control
Temperature (
CT
) setting at the start of the test. This is best accomplished if the Warm-up Time is
the first temperature/heating test performed, with the incubator initially at an ambient temperature
less than 25 °C. For other tests to be performed efficiently, it would be best to target a
CT
of 36 °C.
Operation/Chapter 4
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