7.3.3
Lamp intensity
Overview
The effective brightness of the light source can be adjusted via the lamp intensity.
Depending on the type of device, this is done by changing the intensity of the light
source or the exposure time of the detector.
Setting the lamp intensity
Set the lamp intensity to less than 100% only if overdriving cannot be avoided by
increasing the measuring rate. If a highly reflective surface is being measured where
overdrive still occurs even at the highest measuring rate, reduce the exposure time.
The feedback of the device indicates the proportion of the exposure time in the measur‐
ing cycle time. A target value of 100% therefore cannot always be achieved.
Configuration with commands
Command
LAI
Example
Input
Action
LAI 80
Sets the effective brightness of the light source to 80%.
LAI ?
Queries the lamp intensity.
7.3.4
Averaging
Overview
A freely selectable number of individual measurements can be summarized and the
average value calculated from them. This averaged value is displayed and, if necessary,
transmitted via the interfaces. Whether averaging is useful depends on the current
measuring task and must be determined individually.
Examples: When does averaging make sense?
•
Minimize noise.
•
Reduce the influence of vibrations.
•
Reduce measuring rate.
Setting the averaging
When averaging measured values, it is defined how many measured values are aver‐
aged before output. Averaging of measured values is recommended when the shape of
the peak, but not its position, is stable.
Spectrum averaging specifies the number of spectra that are averaged. Averaging
spectra is recommended when individual points of the peak are noisy or the shape of
the peak varies. This can be caused by low light conditions.
If both average value calculations are activated, then the averaging of spectra takes
place first, then the averaging of measured values.
Averaging reduces the output rate according to the filter setting.
NOTE
Example
Measuring rate = 40 Hz, average value = 4, output rate = 10 Hz
To switch off averaging, select the value 1 (default setting). Invalid measured values,
e.g. if the quality is too low, are not included in averaging.
7
COMMISSIONING
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O P E R A T I N G I N S T R U C T I O N S | OD7000
8027188//2022-05-25 | SICK
Subject to change without notice
