Program Control; Temperature Diagrams - Atlas XENOTEST ALPHA Operating Manual

ATLAS
7.3 Program control system (fig. 4)
The program control system of the ALPHA and
HIGH ENERGY together with the sensors for
irradiance, black standard temperature, test
chamber temperature and rel.humidity allows the
following optional programming of the requested
test procedure:
1. light and dark phases,
2. with controlled irradiance,
3. with controlled black standard temperature,
4. with controlled test chamber temperature,
5. with controlled humidity,
6. with cyclical rain or dew of the samples at
controlled water temperature.
7.4 Temperature diagrams (fig. 38, 39 and 40)
The black standard temperature (BST and the test
chamber temperature (CHT) resp. the difference
∆T = BST - CHT are of major importance for
material testing.
Fig. 31 shows the temperature fields ∆T for the
three different XENOCHROME filter systems as a
Figure 38: ALPHA temperature fields with XENOCHROME filter system
90
XENOTEST ALPHA
XENOCHROME filter variations:
80
XENOCHROME 270
XENOCHROME 300
70
XENOCHROME 320
60
50
40
30
20
10
0
0 20
ALPHA and HIGH
Safety instructions
ENERGY features
Function Program example
Operating manual XENOTEST ALPHA / ALPHA HIGH ENERGY
ALPHA and HIGH ENERGY offers:
1. ten test programs with 10 test cycles each
2. continuous display of the current test
3. display of the lamp and unit age,
4. program end selectable by exposure time,
5. interfaces RS 232 and RS 485,
6. printer protocol of the equipment data.
function of the irradiance. Another parameter in this
diagram is the fan speed. With a maximum fan
speed, minimum ∆T values can be achieved, and
maximum ∆T values are obtained at minimum fan
speed.
Fan speed 500 rpm
40 60 80
E [W/m²]
Unit set-up
Setting up tests
parameters comparing Target/Actual,
radiant exposure and duration of program,
Fan speed 2500 rpm
100 120
Unit description Options und accessory
Care and cleaning Maintenance
140 160
Start-up
List of options and
accessories
Page 47