Siemens SITRANS WM300 MFA Operating Instructions Manual page 48

Parameter assignment
6.7 Differential speed detection
Therefore, a differential of 6 Hz (10%) on channel A or 3 Hz on channel C will cause a
differential alarm to be activated.
● P041: xxx Hz
● P042: xxx Hz
Note
In the event both sensors do not monitor the same frequency, the maximum frequency
setpoints can be different. The programming calculates the setpoint difference in percentage
(%).
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SITRANS WM300 MFA
Operating Instructions, 08/2018, A5E45090709-AA