1.
Open the c:\temp\Settings.ini file with Windows
Notepad.
2.
Change the value of the “T_fine_tune” variable.
Changing the value from 0 to 0,01 will move the
peaks to about 5 data points. Using a negative value
(-0,01) will move the peaks to the opposite direction.
3.
Save and close the file.
4.
Open the laser software and run the “Laser I&R” test
from the “Test” page. The peaks should have moved
according to the value you’ve set to the variable.
Test page with Laser I&R
function, STOP and
distribution of peaks
5.
Increase the value as much as needed and try to
find a value where the peak spacing is close to 50
data points.
6.
Check that the final “Laser R” value is close
(inside couple of hundred Ohms) to the “Rvalue”
mentioned in the “Settings.ini” -file. If not, there
could be another oxygen peak closer to the original
value but to the “other direction” (negative or
positive adjustment value).
5.7 Internal oxygen concentration problems
Sparklike Laser is a gas fill analyser that works by meas-
uring the oxygen inside the glazing unit. To ensure cor-
rect readings, oxygen needs to be removed from inside
the measuring head by replacing it with argon or other
flushing gas such as xenon or nitrogen.
Internal oxygen concentration is tested from the
Settings Page on the software by pressing the “Self
check” button. When testing the internal oxygen level
or making the argon fill, the operator might run into the
following situations:
Internal oxygen concentration result does not go below
0.1 %, as required. Normally the internal oxygen con-
centration level should drop below 0.1% within about
20 min of flushing time. If the oxygen level settles to a
value over 0.1% and does not go any lower, please check
that:
Î
the used flushing gas is pure (>99.9 % argon)
Î
there is pressure and the flow rate is 1–3 l/min
(maximum 3 l/min!)
Î
gas fill button is enabled on the software’s Settings
Page
Î
turn the measuring head slowly upside down a few
times to help remove oxygen (otherwise keep the
measuring head vertically on the holder)
Î
If all of these are OK, but the problem persists,
please contact
for further
assistance.
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