Calibration, Maintenance, and Troubleshooting
1919-R User Manual
94
Sensitivity
Available for all Thermopile sensors. Modify overall sensitivity of the sensor. This will affect power
and energy readings for all laser settings. When this is selected, the main screen will display
Sensitivity
and
Calibration Factor
values on the left.
Figure
12-4 Calibrating per Sensitivity
Figure
12-5 Modifying Overall
Sensitivity Calibration Factor
Figure
12-6 Updated Sensitivity
Calibration Factor in Main Screen
Energy
Not applicable for 919P-5KW-50 and similar sensors that do not measure energy and will not be
offered as an option for them. Modify energy readings for all laser settings. Affects energy
readings only.
Figure
12-7 Calibrating per Energy
Figure
12-8 Modifying Energy
Calibration Factor
Figure
12-9 Updated Energy
Calibration Factor in Main Screen
Response
Available for all Thermopile sensors. Optimize Thermopile response time of the sensor. Use to
attain accurate readings as quickly as possible and to minimize overshoot (erroneous power
readings above 100% full scale). Affects power and energy readings.
Thermopile sensors are slow in their response to a laser hitting them. 1919-R contains software
that algorithmically “speeds up” the response. Response tweaking is a feature that Newport
provides for users to tailor this to their application. It allows the user to find the optimum setting
to speed up the response, prevent overshoot (erroneous readings that are above the actual
power), and remove undershoot (not quite reaching and/or dipping back below the correct
reading).
Response configuration is provided as a multi-step wizard with on screen guidance for each step.
The basic workflow includes:
Scaling the graph to the power level expected when reading stabilizes. See steps
below.
