In certain applications, the existing or voltage signal of a pressure transmitter should never exceed and/or drop below a crucial value. This can be ensured using so-called signal limiting.
Why is a signal clamping necessary in the first place?
If เกจวัดแรงดันไฮดรอลิค on a pressure transmitter lies within the nominal pressure range, then you will have a defined signal output (e.g. 4 ? 20 mA or 0 ? 10 V). However, in technical applications, it frequently happens that an originally planned pressure range is exceeded or is dropped below. This may happen deliberately, for instance when cleaning, in addition to accidentally, for instance through load variations or in case of a fault. In these cases, the sensor signal will also move outside the defined limits, in order 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 being 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 makes sense, so that 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.