Siemens SITRANS F Series Operating Instructions Manual page 90

Functions
7.8 Pulse Out Setup
9. Use the <Up/Down Arrow> and <Left/Right Arrow> keys to program the desired pulses
Note
Make sure to select a pulse value that will ensure a pulse rate of at least 20 pulses per
second (20 Hz) at your lowest flow rate or data will be lost. PGEN produces a 50/50 duty
cycle pulse output; therefore the pulse width is relative to the pulse rate at any given time.
10. Press <ENTER> to save the new entry.
Totalizer Pulse Scaling
When pulse rates are required for counting, sampling, batching, etc., the Totalizer pulse can
be selected. The FST020 offers a pulse output relative to either the positive flow direction
Totalizer or the negative flow direction Totalizer. The Totalizer pulse output will produce 1
pulse each time the Least Significant Digit (LSD) of the Totalizer increments.
To program the desired pulse volume the user must configure the Totalizer scale and
resolution settings to set the LSD of the Totalizer equal to the pulse volume desired. These
settings are performed in the [Flow/Total Units] menu.
1. From the [Single Channel] menu press the <Right Arrow> key and scroll down to
2. Press the <Right Arrow> key then scroll down to select [Total Vol. Units]. Press the
88
per gallon.
[Flow/Total Units].
<Right Arrow> key and then the <Up/Down Arrow> keys to select the desired units.
FST020 IP65 NEMA 4X
Operating Instructions, 02/2012, A5E03086487-05