11.4 Serial measurement
Please read chapter11.1, „Safety instructions“, on page18 first.
Always start a measurement series with the smallest power and increase it gradually.
Small amounts of energy should be measured with absorber temperatures that are
close to the ambient temperature.
In general:
The minimum amount of irradiated energy should amount to approximately twenty times
the difference of the absorber temperature minus room temperature, so at least 50J.
In case of subsequent measurements, the residual capacity of the absorber for another
laser pulse has to be considered. Tab.11.2 on page22 shows information for select-
ing the energy permissible for a series measurement in conjunction with the absorber
temperature.
25 30 35 40 45 50 55 60 65 70
Absorber temperature in°C
Permissible measuring energy in J
1000
3000
10
100
1
st
measurement 50J
2
nd
measurement 100J
3
rd
measurement 300J
4
th
measurement 600J
5
th
measurement 900J
Max. energy input
Min. energy input
Tab.11.2: Example of a series measurement in conjunction with the absorber temperature
If the absorber temperature is greater than 70°C, it won’t be possible to take any
further measurements. In this case, please wait until the temperature falls to below
50°C (depending on the energy application selected). Please take the limit values from
Tab.11.2 on page22.
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