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Operating Manual SunCool for SUNTEST
®
CPS+
5.1 SunCool functionality
The SunCool unit allows the Suntest
®
CPS+ instrument
to supply cooled air to the test chamber. To do this, the
evaporator unit
2
(
Fig. 3,
page 16) takes in room air and
feeds it into the test chamber at the temperature reduced
by the heat exchanger.
NOTE – freezing!
Freezing is improbable in the system butplease contact
your technical service representative in the event that it
does occur. The SunCool instrument is switched off by a
thermostat to avoid freezing and switches back on after
thawing. The values for the test chamber temperature
may therefore deviate from the set values during freezing.
Fig. 4
5
Functional description
0
5
10
15
20
25
30
35
200
300
400
500
600
700
800
E [W/m²]
BST/CHT Values Suntest CPS+ (II) with SunCool
[Daylight red. IR Filter]
BST
CHT
0
5
10
15
20
25
30
35
200
300
400
500
600
700
800
E [W/m²]
BST/CHT Values Suntest CPS+ (II) with SunCool
[Windowglass red. IRFilter]
BST
CHT
CHT,BST [°C]
CHT,BST [°C]
5.2 Setting the test parameters
The minimum test chamber temperature (CHT) and black
standard temperature (BST) in the SUNTEST are directly
dependent on the ambient temperature. The higher the
ambient temperature, the higher the blow-in temperature
of the chiller and, as a result, the minimum CHT and BST.
The diagram below (
Fig. 4
) shows the approximately
achievable test chamber and black standard temperatures.
