Ophir Optronics Ltd QSR ユーザーズマニュアル
Chapter 4 – Measuring with the Thermopile Head
Configuring Measurement Settings in Energy Mode
To select an average period:
1. Select the average in seconds from the Average drop down list in the
Graph Configuration Area.
Figure 4-4 Average Drop Down List
Disabling Averaging
You can disable averaging from the Average drop down list.
To disable averaging:
1. Select None from the Average drop down list in the Graph Configuration
Area.
Configuring Measurement Settings in Energy
Mode
Mode
Laser wavelength and range are configured exactly as in power mode. This
section describes the READY sign as well as the Energy Threshold setting,
which are only available in energy mode.
section describes the READY sign as well as the Energy Threshold setting,
which are only available in energy mode.
Using the Ready Sign
When the instrument is ready to measure a new pulse,
will appear in the
Graph Configuration Area and flash on and off. The next pulse will
automatically clear the screen, and the new value will be displayed. If you fire
another pulse before READY appears, the reading may be inaccurate or may not
be displayed.
automatically clear the screen, and the new value will be displayed. If you fire
another pulse before READY appears, the reading may be inaccurate or may not
be displayed.
Configuring the Energy Threshold
If the instrument is used in a noisy environment, or where high levels of
background thermal radiation are present, the instrument may trigger spuriously
on the noise or background radiation. It would then fail to measure the intended
pulse. Since some degree of noise or background radiation is inevitable, the
instrument is designed not to respond to pulses below a preset minimum level.
background thermal radiation are present, the instrument may trigger spuriously
on the noise or background radiation. It would then fail to measure the intended
pulse. Since some degree of noise or background radiation is inevitable, the
instrument is designed not to respond to pulses below a preset minimum level.
The minimum energy threshold is typically set to 0.3% of the full scale of the
selected range. If this level is too sensitive for your particular environment, you
can alter it. Do not, however, raise the threshold higher than necessary, as this
will cause degradation in the accuracy of pulse measurements, approximately 4
times lower than the threshold level. Setting the energy threshold also enables
you to detect the onset of a pulse.
selected range. If this level is too sensitive for your particular environment, you
can alter it. Do not, however, raise the threshold higher than necessary, as this
will cause degradation in the accuracy of pulse measurements, approximately 4
times lower than the threshold level. Setting the energy threshold also enables
you to detect the onset of a pulse.
StarLab User Guide
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