Sensor Installation Handbook Preface 3rd edition - Siemens ...
Sensor Installation Handbook Preface 3rd edition - Siemens ...
Sensor Installation Handbook Preface 3rd edition - Siemens ...
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Principles of operation<br />
64<br />
Switching devices<br />
On/off<br />
Changeover<br />
3-position<br />
Multi-stage<br />
Dynamic switching differential<br />
Setpoint<br />
Switching devices<br />
Thermostats<br />
Hygrostats<br />
Pressure switches<br />
Where a switching device such as a thermostat is installed in a system,<br />
it should be noted that the temperature swing will be wider than the<br />
switching differential of the thermostat. The thermostat operates at the<br />
switching points specified in the data sheet (static switching differential),<br />
but the inertia of the system (residual heat, dead time etc.) causes the controlled<br />
variable to overshoot or undershoot. The finally measurable temperature<br />
swing (the dynamic switching differential) will therefore always be<br />
wider than the static switching differential of the thermostat.