DATREND Systems vPad-TI, Руководство по эксплуатации

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vPad-TI OPERATING MANUAL
5.5 Warm Up Time Test
According to the standard, the manufacturer should stipulate a nominal warm up time ( WT ) for the
incubator in the user manual, and when tested, the warm up time should not differ by more than
20%. To measure the
WT
the incubator should be in a ‘Cold Condition’, where the ambient
temperature is less than 25 °C . The software will measure the start or ambient temperature in the
incubator and will add 12 °C to it to determine the target control temperature (
CT
).
Following the instructions presented in Figure 53, the mattress is first set to the horizontal position.
A suggested
CT is calculated from the ambient temperature in the inc12 °C, in this case,
37 °C. The
CT
can be set to a value equal to or more than this suggested value. The incubator is
then set to Air Control and the incubator is turned
ON
, if it is not already running. When the
actions indicated in the instructions are complete, click on the Continue button to start the test.
During the
WT
test, the program will display a graph of incubator temperature versus time, along
with several key parameters (see Figure 54). Due to the large thermal mass of the air in the
incubator, temperature measurements are taken at 1 minute intervals. The Ambient Temperature
(
Ta ) is the temperature at which the test started. The Current Temperature is the temperature 10
cm above the center of the mattress, or
IT
. The End Temperature (
Te
) is 11
o
C above the Ambient
Temperature. The Warm Up Time
WT ,
is the time it takes to go from the
Ta
to
Te
, and is shown
when the test condition is met.
Figure 53 : Warm Up Time Instructions
Running a Test/Chapter 5
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