METIS M308 / M309 / M313 / M316 / M318 / M323 / H309 / H316 / H318 (12-pin)
SensorTools Software
42
7.2.3.5 Single-Point Adjustment
The
single-point adjustment function
is used to readjust the pyrometer to a
mainly used measuring temperature.
The function can be used, e.g. to compensate optical losses in measurements through windows or
lenses with unknown transmittance (for example, when coupling the pyrometer into a laser beam deliv-
ery system).
For this purpose, the pyrometer has to be aligned to a calibration source with this required temperature
or a portable calibration source is positioned at the measuring point and the adjustment function is car-
ried out.
This function adjusts the pyrometer to one specific temperature and ensures accurate meas-
urements in the range around this temperature.
With factory calibration (delivery status), the pyrometer is calibrated and adjusted at several
temperatures. Therefore, measurements in the entire measuring range are more accurate with
the original factory calibration.
Preparation:
-
Align the pyrometer to calibration source
-
Enter the calibration temperature (the calibration temperature should not be directly at the begin-
ning of the temperature range, preferably about 20% of full scale above the start of temperature
range).
Display of current status:
-
:
A red arrow indicates the current step that requires a user’s action.
-
A spinning animation shows the currently being processed step.
-
A green checkmark signalizes the successful completion.
-
The procedure can be canceled at any time by clicking on "Cancel", then the device is reset to fac-
tory calibration.
-
Clicking on the help question mark will open a help text to the right.
A click on "
Start automatic adjustment
" starts the proce-
dure.
Note:
This will set the emissivity to 100%, will switch off the
peak picker and set the response time to 5 ms. These val-
ues are not automatically set back to their previously set
values and then have to be readjusted afterwards!
Measurement with covered optics (only M3 models):
At
the determination of the so-called dark-offset, a measure-
ment with completely darkened optics is carried out, this
can increase the accuracy outside the adjusted tempera-
ture: Cover the lens opaque (for example, press the hand
in front of the optics) and keep it covered during the opera-
tion. This takes up to 20 seconds, after completion, the but-
ton text changes to "Dark offset is determined".
Remove the optics cover and
confirm
that the
optics cov-
er is removed
.
"
Determine adjustment values
" continues the automatic
adjustment in front of the calibration source.
Result:
After finishing the adjustment of the success or
failure will be displayed in text form.
A
backup file
can be created with the determined adjust-
ment values (adjustment value file). This can be used to
write the values back into the device at any time, for exam-
ple, when the device has been reset to factory calibration.
