FLUID COMPONENTS INTL
CHAPTER 3 - OPERATION
Model ST98 Flow Meter
3 - 8
Doc. No. 06EN003291 Rev. A
COMMAND:
I. Output Current Adjust
Summary:
Permits the user to manually vary the output from 4 mA to 20 mA by entering a value of 0 to 1000.
Description:
This diagnostic command allows the user to vary the output for troubleshooting purposes, Entering 0 will set the
output current to 4 mA. Entering 500 sets the output to 12 mA. Entering 1000 sets the output to 20 mA. Also
displayed is the output load in ohms.
Example:
Pressing [I] [ENTER] will display “Enter # (0-1000)”. Pressing [0] will display "4 mA" followed by
"Load: xxx ohms".
COMMAND:
J. Serial Number, Customer Order Number
Summary:
For FCI Calibration personnel only. A passcode must be entered.
Description:
None.
Example:
N/A.
COMMAND:
K. Constants Setup
Summary:
Permits the instrument to be placed in setup mode. A passcode must be entered.
Description:
In order for the instrument to function properly, certain constant values and curve fitting parameters must be
supplied to be able to compute a verifiable flow rate for display. This command consists of four sections and is
password protected. Section (1) is available whenever default constant values need to be reloaded into the
EEPROM (the default data is automatically loaded at boot-up if a new or “cleared” EEPROM is detected). Section
(2) consists of selecting the best curve fit equation in order to linearize the input signal. The two Curve Fit
selections are: 0 = 2nd order polynomial and 2 = two 2nd order polynomials. Section (3) consists of making
available the temperature compensation factors for modification. (Section 4) allows for the maximum flow and
minimum flow parameters to be modified along with the standard density of the medium of calibration.
Example:
Pressing [K] [Enter] will display “Enter Code #”. Press in the passcode. Pressing [Enter] will display
“Defaults? <“. Pressing ‘Y’ [Enter] will setup the required initial values, pressing an ‘N’ or [Enter] will skip
to the next prompt , “Curve Fit = x”, “Change it ?<“. Pressing a ‘Y’ will display “0=Poly, 1=Log” on first
line and “2=Two Seg Poly” on the second line to allow choosing one of the three. If “Two Seg Poly” is
selected, then “Brkpt xxxx” is displayed on the first line and “Change it?<” is displayed on second line.
Pressing ‘Y’ will display “Enter Brkpt #”. Pressing an 'N’ or [Enter] will skip to the next prompt ,
“Input Coeffs?<“ and pressing a ‘Y’ will display “c1 = xxxxxxx” so the coefficients can be entered for either
“0=Poly, 1=Log” selections. If “2=Two Seg Poly” is selected, “Segment one ?<” is displayed. Pressing a
‘Y’ will display “c1 = xxxxxxx” followed by “Change it?>”. If ‘Y’ is pressed, a coefficient value must be
entered or else the next coefficient will be displayed, etc. After coefficients are entered or ‘N’ or [Enter] is
