Signal clamping in pressure transmitters

In certain applications, the current or voltage signal of a pressure transmitter must not exceed and/or drop below a crucial value. Sadly could be ensured with the aid of so-called signal limiting.
Why is a signal clamping necessary to begin with?
If Fool on a pressure transmitter lies within the nominal pressure range, then you will see a defined signal output (e.g. 4 ? 20 mA or 0 ? 10 V). However, in technical applications, it frequently happens an originally planned pressure range is exceeded or is dropped below. Overnight can happen deliberately, for example when cleaning, along with accidentally, for example through load variations or in case of a fault. In such cases, the sensor signal may also move outside the defined limits, so that, for example, an ongoing signal in the number of 3.6 to 25 mA may appear.
If now, however, the evaluation electronics are set so they recognise a signal outside of the defined limits as an error, in some situations, trouble-free operation of the entire system cannot be ensured anymore. In such cases, a signal limiting of the pressure transmitter is practical, so the output signal is maintained within the mandatory range (e.g. 3.8 ? 21 mA).
Note
A good example of a pressure transmitter with which the voltage signal plus the current signal can be limited may be the model S-20 (for general industrial applications) or the model MH-3 (for mobile working machines) from WIKA.

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