Toshiba Tohsiba Electromagnetic Flowmeter Converter L5232 - Manual (Page 147)

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10.7 Remote Still Water Zero Adjustment
Still water zero adjustment can be performed using an external signal.
To use this function, follow the procedure in 8.2.14, “Digital I/O Function” and set the DI as a zero
adjustment start signal.
[Signal input condition]
Zero adjustment signal
10 seconds
20 seconds
Zero
adjustment
start
H level signal
L level signal
* The signal must be set to H level first and then it must go to L level 10 seconds later but not more
than 20 seconds, and then zero adjustment starts at the falling edge of the signal.
If the signal stays in H level less than 10 seconds or more than 20 seconds, the signal will be
ignored.