Fluid Components International GF90_GF92 - Manual (Page 47)

Doc. No. 06EN003229 Rev. H 43 GF Series Flow Meter Models GF90/GF92
FLUID COMPONENTS INTERNATIONAL LLC http://www.fluidcomponents.com
The relationship between the measured and the desired flow rates was determined through a least squares
analysis. The coefficients for the above relation are:
F1 = -7.5672 F2 = 2.09253
F3 = -0.037082 F4 = 0.0003505
To enter the correction equation coefficients and to enable it:
1. From the Main menu press 4. The 4.0 MISCELLANEOUS menu title will appear.
2. Press 2, the Corrector Setup option.
3. Press 2, the Enter Corr option, to enter the Correction Equation coefficients
4. Enter the user password (if it is enabled). Press 1 to enter the coefficient F1. Press 2 for F2 and so on
to F4. Press 5 to verify the entries.
5. Press 6 to exit.
6. Press 1 to enable to Corrector. (To disable the Corrector press 1 again.)
The Auxiliary Input
The flowmeter has one analog signal input port that can be used to directly manipulate the flow rate output.
This signal input port is called the auxiliary input. The signal measured by the flowmeter allows for the
correction of errors that may be caused by changes such as process composition. The factory has
determined from the application data supplied at the time of order whether the flowmeter would benefit from
using the auxiliary input. If the auxiliary input is not used in the flowmeter the following section can be
skipped. If the auxiliary input is used, all the internal settings necessary have been entered into the flowmeter.
The following is a description of the internal and external workings of the auxiliary input.
To determine if the flowmeter is set to use the auxiliary input:
1. From the Main menu press 2. The 2.0 PORT SETUP menu title will appear.
2. Press 4, the Aux Input option.
3. Press 2, the Enter Aux option. Enter the user password (if it is enabled).
4. Press 6, the Verify option. The variables AUX 1, 2 and 3 will appear.
5. Press ENTR and DISABLED or ENABLED will be on the third line. If ENABLED is displayed then
the flowmeter has been configured to use the auxiliary input.
The auxiliary input is accessed at terminal JP6 located on the lower circuit board. Figure 29 illustrates the
auxiliary input connected to a current source. If OUT 1 COM is not easily accessible then use JP6 OUT 2
COM, JP7 GND, JP1 DC GND or JP3 GND. They are electrically the same signal ground point. The range of
this source is most likely 4-20 mA.
+20V
1 AUX
+E OUT 2
OUT 2 COM
+I OUT 2
+E OUT 1
OUT 1 COM
+I OUT 1
JP6
C00249-1
Figure 29. Auxiliary Input Wiring Diagram