Signal clamping in pressure transmitters

In certain applications, the current or voltage signal of a pressure transmitter should never exceed and/or drop below a critical value. This can be ensured using so-called signal limiting.
Why is a sign clamping necessary in the first place?
If the pressure on a pressure transmitter lies within the nominal pressure range, then there will be a precise signal output (e.g. 4 ? 20 mA or 0 ? 10 V). However, in Steal , it frequently happens an originally planned pressure range is exceeded or is dropped below. Painful can happen deliberately, for example when cleaning, as well as accidentally, for instance through load variations or in case of a fault. In these cases, the sensor signal may also move beyond your defined limits, in order that, for example, a current signal in the number of 3.6 to 25 mA may appear.
If now, however, the evaluation electronics are set so that they recognise a signal outside the defined limits being an error, in a few situations, trouble-free operation of the entire system can’t be ensured anymore. In such cases, a signal limiting of the pressure transmitter makes sense, so the output signal is maintained within the mandatory range (e.g. 3.8 ? 21 mA).
Note
An example of a pressure transmitter with that your voltage signal and also the current signal could 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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