Can I calibrate the 4-20 mA span without viewing the blue LED?
The 4-20 mA span can be calibrated by measuring the current consumption alone with a digital multi-meter or display. During the initial moments of calibration, the sensor draws 22 mA while it’s acquiring the target distance. At the time that the sensor places the set point, the current will jump down to the appropriate 20 mA or 4 mA set point and the blue LED will flash.
