The ambient conditions determine the sensor‘s reliability. Working at its maximum range in demanding ambients, the sensor will soon perform less efficiently and finally be inoperable due to dirt covering the lens. If the same sensor works at half its distance in the same environment, the good performance may be kept stable for a longer time. The optimal range for each sensor and the individual ambient conditions is determined with the excess gain curve.
The AID emits pulses at a rate proportional to the quantity of received light. The higher the pulse frequency, the higher the amount of light. A pulse rate of 1 Hz indicates that the sensor receives just the right amount of light it needs to switch. Slight contamination may cause malfunctioning. A pulse rate of 3 Hz or more ensures reliable operation of the sensor.
All sensors in this catalogue have an alignment indicator or an output indicator. Sensors with an Alignment Indicating Device (AID):First, roughly align by eye:a. The emitter and receiver or b. The sensor and reflector or c. The sensor and object. Next move one of the sensors or reflector up, down, left and right whilst observing the AID LED; the flash rate of the LED will increase as the alignment improves. Also rotate the sensor up, down, left and right. Decreasing the gain may help to achieve optimum alignment once rough alignment has been found, but always return gain to the required setting once final alignment has been achieved.Sensors with output indication:First, roughly align by eyea. The emitter and receiver or b. The sensor and reflector or c. The sensor and object.The optimum alignment position is the centre of movement up, down, left and right whilst observing the output indicator and noting the position where the indicator just turns on or off. Also rotate the sensor up, down, left and right.
Distance at which the sensor securely switches.
The alarm output indicates low excess gain or overload. Many sensors mentioned in this catalog feature an alarm output.
The point where the high-frequency magnetic field leaves the sensor. Regarding threaded barrel sensors, the active face is at the front. Concerning rectangular plastic sensors, the zone of the active face is marked with a target.