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Adjusting the evaluation limits
The ultrasonic sensor features an analogue output with two teachable evaluation limits. These are set by applying the supply
voltage -U_B or +U_B to the TEACH-IN input. The supply voltage must be applied to the TEACH-IN input for at least 1 s. LEDs
indicate whether the sensor has recognised the target during the TEACH-IN procedure. The lower evaluation limit A1 is taught
with -U_B, A2 with +U_B.
Two different output functions can be set:
1. Analogue value increases with rising distance to object (rising ramp)
2. Analogue value falls with rising distance to object (falling ramp)
Evaluation limits may only be specified within the first 5 minutes after
Power on. To modify the evaluation limits later,
the user may specify the desired values only after a new Power On.

TEACH-IN rising ramp (A2 > A1)
- Position object at lower evaluation limit
- TEACH-IN lower limit A1 with - U_B
- Position object at upper evaluation limit                                                
- TEACH-IN upper limit A2 with + U_B

TEACH-IN falling ramp (A1 > A2):
- Position object at lower evaluation limit                                              
- TEACH-IN lower limit A2 with + U_B                                   
- Position object at upper evaluation limit
- TEACH-IN upper limit A1 with - U_B                                                                   
 
Default setting
A1: unusable area
A2: nominal sensing range
Mode of operation: rising ramp    
                                                   
LED Displays