SDP Gap distance sensor: Device configuration

The following will guide you through key programming steps for the SDP air gap sensors. More details can be found below on this page.

Common programming features

All of ifm's process sensors, including the SDP air gap sensor, use similar terminology for programming. We highlight the features used most often here. Refer to the Operating Instructions manual found under the "Downloads" tab at the product datasheet page for more details on these and other features.

Switching outputs 

• Hno -- hysteresis normally open: Output turns on when the distance set point (SP) is reached and stays on until the distance drops below the reset point (rP)
• Hnc -- hysteresis normally closed: Output turns off when the distance set point (SP) is reached and stays off until the distance drops below the reset point (rP)
• Fno -- window normally open: Output turns on when the distance is between the high limit (FH) and low limit (FL)
• Fnc -- window normally closed: Output turns off when the distance is between the high limit (FH) and low limit (FL)

Analog outputs 

• ASP -- analog start point:  The measured distance where the analog signal equals 4 mA
• AEP -- analog end point:  The measured distance where the analog signal equals 20 mA
• MAW -- initial value of the non-scaled measuring range
• MEW -- final value of the non-scaled measuring range

The chart shows how the analog signal and display information changes when the flow rate is above / below the scaled or non-scaled measuring ranges. This feature is useful in for your process control and troubleshooting issues.

The minimum scaled measuring range is available on the product datasheet.