User manual CARLO GAVAZZI UA 30 CLD

[. . . ] Offset is the distance from the sensor front to the closest end of the range. Range is the distance which causes the output to change from 0-10 V or 4-20 mA. Within the range, the output impedance is low and current flows (<100 mA). Hysteresis To ensure a stable output (when a measured distance equals the setpoint), a hysteresis can be programmed. [. . . ] Offset Adjustment A difference can exist between the read-out and the real distance. 0 mm in the read-out and 0 mm in the physical length might differ. The position of 0 mm can be adjusted with the sensor head offset adjustment +/-128 mm in mm steps. Example of negative offset (see following drawing): The output indicates a distance which is 30 mm behind the target. By setting the offset to -30 mm, this misreading is neutralized as 30 mm are subtracted from all measurements. By setting the under range to a certain distance, it is possible to ignore echoes received from targets between the sensor front and the under range limit. This means that it is possible to ignore disturbing objects close to the sensor. Using a wrong slope adjustment can affect the linearity and the temperature compensation. Window Width By operating the sensor with the mean value routine a window is created around the actual measured distance. all measured values within this window form the basis for the read-out. This read-out is then the centre of the window for the next read-out, and therefore the window is moving with the target. The maximum speed of the window movement limits the speed of a target that should be detected. If the target moves too fast, the fail pulse suppression algorithm will ignore distance measurements. The maximum speed depends upon the cycle time and the size of the used measuring window. With the command "Cycle time adjustment" it is also possible to adjust the measurement window. Normal size of this measurement window is ± 32 mm. Sensor electronics are well protected against electromagnetic disturbances from the environment. In addition, the microprocessor is used in a very effective way to filter the right signal out of a noisy environment. Factory settings are optimised to fulfill most of the measurement tasks. With the actual measured distance as the centre, a ± 32 mm window is created. [. . . ] Offset (décalage) est la distance entre la face avant du détecteur et le point le plus proche sur une distance de détection. Read configuration from sensor (consultation de la configuration sur le détecteur même) Le détecteur télécharge et affiche la configuration. Dépassement de distance en moins Le détecteur permet de régler le dépassement distance en moins par incrément de 0 à 255 cm. Offset Adjustment (Réglage du décalage) Une différence peut exister entre la distance affichée et la distance réelle. [. . . ]