OPERATION ST100 Series Flow Meter
28 Fluid Components International LLC
External Input Flow Adjust (EIA)
This mode corrects the flow rate of an ST100 flow meter when an external 4-20 mA current is fed into the Auxiliary Input port. Four polyno-
mial factors are used to determine the correction applied to the flow rate and corresponding 4-20 mA output. The equation that defines this
correction is as follows:
Corrected Flow Rate = (Starting Flow Rate x Factor1) + (Factor2 x 4-20 mA Input) + (Factor3 x 4-20 mA Input
2
) + (Factor4 x 4-20 mA Input
3
)
Make all necessary connections as shown in the wiring diagram in Figure B-19.
Start the application. Click USB Connect on the home screen. Select the Configuration branch from the menu tree on the window's left side. Se-
lect the Extended Op. Mode tab. Click Toggle System Mode. Enter user level password 2772 at the prompt. Verify instrument is in the service
state with Setup showing in System Mode field. Click External Input Flow Adjust (EIA) radio button. In the window’s Ext. Input Flow Adjust
Setup field enter the four polynomial factors in the text box for Factor1, Factor2, Factor3, and Factor4.
At window bottom click Set System Mode to ‘Running’ when Send check box. Click Send to Device near check box to send the EIA program-
ming to the instrument. Observe return to normal operation with Running showing in System Mode field.
The Process Data screen on the ST100 configuration application will now display “EXTENDED OP MODE EIA” in the upper left corner. The
HMI display also shows EIA on the Group Number line after the HMI is refreshed. Refresh the HMI display by cycling the power to the unit or
covering the Hot Key for 3 seconds.
External 4-20 mA Correction Input Screen
Example Process Data Screen with EIA Mode Shown
EIA Select
Enter the Factors as needed
Select (Checked)
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