APC AXFA11G user manual Meter Factor Settings

selected, a setting alarm will be displayed. The setting should be returned to “Standard DF” in such a case.

•When dual frequency excitation mode is changed, perform zero adjustment. For details on zero adjustment, refer to chapter 9.

[C21: Low MF] Setting of the low-frequency meter factor

This parameter sets the low-frequency meter factor for standard dual frequency excitation.

This parameter is also used for pulsed DC excitation in which AXFA11 is combined with a remote flowtube the size of 500 mm (20 in.) or larger.

[C22: High MF] Setting of the high-frequency meter factor

This parameter sets the high-frequency meter factor for standard dual frequency excitation.

If AXFA11 combined with a remote flowtube the size of 500 mm or larger, high-frequency meter factor need not be set.

NOTE

Meter Factor Settings

Meter factors of flowtube

Flowtube data plate

Converter data plate

F0601.EPS

(1)Confirm that the serial number indicated by COMB.NO. on the AXFA11 converter’s data plate corresponds with the AXF Remote Flowtube’s serial number.

(2)Set the values that are marked in the METER FACTOR fields on the data plate for the Remote Flowtube.

(3)The meter factors are crucial in ensuring that the electromotive force is correctly in propor- tion to the flow velocity and are determined at the manufacturing plant by actual-flow calibration.

6. PARAMETER DESCRIPTION

[C23: Low MF (EDF)] Setting of the low-frequency meter factor for EDF

This parameter sets the low-frequency meter factor as required when Enhanced DF (i.e., enhanced dual frequency excitation) is selected. If “Standard DF” has been selected for C20: Measure Mode, neither C23: Low MF (EDF) nor C24: High MF (EDF) is displayed, and if “Enhanced DF” is selected, the four parameters from C21 to C24 will be displayed.

[C24: High MF (EDF)] Setting of the high-frequency meter factor for EDF

This parameter sets the high-frequency meter factor as required when Enhanced DF (i.e., enhanced dual frequency excitation) is selected.

[C30: Select Flow Tube] Setting of the flowtube’s model

This parameter sets the models of flowtube. When combining this product with an AXF Remote Flowtube, “ADMAG AXF” should be selected.

[C31: Nominal Size Unit] Setting of the nominal size units

This parameter selects the units used for setting of the nominal size.

[C32: Nominal Size] Setting of the nominal size This parameter sets the nominal size of flowtube.

[C40: Base Flow Unit] Selection of flow units for the flow rate span

→Refer to the description of parameter B21.

[C41: Base Time Unit] Selection of time units for the flow rate span

→Refer to the description of parameter B22.

[C42: Flow Span] Setting of the flow rate span

→Refer to the description of parameter B23.

[C43: Flow Decimal Pnt] Setting of the decimal point position for the instantaneous flow rate

→Refer to the description of parameter B24.

[C44: Velocity Check] Display of the flow rate span velocity

This parameter displays the flow rate span for the maximum range in m/s units.

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