DATREND Systems vPad-TI, Руководство по эксплуатации

Страница: 66 / 86

vPad-TI OPERATING MANUAL
5.8 Air
Temperature Control Test - High
An incubator must be able to maintain a desired air temperature within the Baby Compartment, and
the air temperature must be reasonably uniform throughout the space. The Standard requires the
incubator to be able to sustain a Steady Temperature Condition (
STC ) after WT is reached. In
addition, the Average Temperature (
AT
) at 10 cm above the center of the four quadrants of the
mattress must not differ from the Average Incubator Temperature (
AIT
) by more than 1.5
o
C with a
horizontal mattress, or 2
o
C for a tilted mattress. The Standard requires this control test be
performed at a high and a low temperature setting. While the Standard allows testing at any
temperature, it generally recommends 36 °C for the high temperature test, and 32 °C for the low
temperature test.
When an
Air Temperature Control
test is initiated by an Autosequence, the test instructions are
presented as shown in Figure 72. The mattress is first set to the horizontal position and the
incubator control mode is set to Air. A
CT
target is displayed based on the value set in the
Autosequence, in this case 36 °C for the high temperature test. 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
OK
button to start the test.
Figure 72 : Air Temperature Control Instructions
When the test starts, the program will create a graph of the temperature at the center of the mattress
at a height of 10 cm above the mattress. As shown in Figure 73, the display will also indicate the
Control Temperature
defined in the Autosequence, and the length of time the test will continue
to run after
STC
is reached. In the example shown, the
Control Time Count Down
has been
set to 30 minutes. After
STC
has been reached, the timer will count down to zero, at which time
the test will terminate. If the time has been set to
Continuous
, the test will run until the
Done
button is clicked.
Running a Test/Chapter 5
#
Page 54