35,0(6
Cube
22
Revision 01/2019 EN
11.4
Serial measurement
Please read chapter 11.1, „Safety instructions“, on page 18 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 50 J.
In case of subsequent measurements, the residual capacity of the absorber for another
laser pulse has to be considered. Tab. 11.2 on page 22 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
1 000
3 000
10
100
10
100
1000
25
30
35
40
45
50
55
60
65
70
ZU
LÄS
SI
GE
M
ES
SE
NE
RG
IE
ABSORBERTEMPERATUR
PWC - Messbereich in Abhängigkeit der Absorbertemperatur
1
st
measurement 50 J
2
nd
measurement 100 J
3
rd
measurement 300 J
4
th
measurement 600 J
5
th
measurement 900 J
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 page 22.
