Emerson Process Management 2400S manual Calculate the meter factor as follows

Measurement Performance

Therefore, to adjust volume flow, you must set the meter factor for volume flow. Setting a meter factor for mass flow and a meter factor for density will not produce the desired result. The volume flow calculations are based on original mass flow and density values, before the corresponding meter factors have been applied.

2.Calculate the meter factor as follows:

a.Sample the process fluid and record the process variable value reported by the flowmeter.

b.Measure the sample using an external standard.

c.Calculate the new meter factor using the following formula:

⋅ ExternalStandard

NewMeterFactor = ConfiguredMeterFactor --------------------------------------------------------------------------------

ActualFlowmeterMeasurement

If you are calculating the volume flow meter factor, note that proving volume in the field may be expensive, and the procedure may be hazardous for some process fluids. Therefore, because volume is inversely proportional to density, an alternative to direct sampling and measurement is to calculate the volume flow meter factor from the density meter factor. This method provides partial correction by adjusting for any portion of the total offset that is caused by density measurement offset. Use this method only when a volume flow reference is not available, but a density reference is available. To use this method:

a.Calculate the meter factor for density, using the preceding formula.

b.Calculate the volume flow meter factor from the density meter factor, as shown below:

1

MeterFactorVolume = -----------------------------------------------

MeterFactorDensity

Note: This equation is mathematically equivalent to the equation shown below. You may use whichever equation you prefer.

MeterFactorVolume =	ConfiguredMeterFactorDensity	⋅	DensityFlowmeter
			Density------------------------------------------------------ExternalStandard

3.Ensure that the meter factor is between 0.8 and 1.2, inclusive. If the calculated meter factor is outside these limits, contact Micro Motion customer service.

4.Configure the meter factor in the transmitter. To configure meter factors:

•Using ProLink II, see Figure B-2.

•Using the display menus, see Figure B-6.

•Using a DeviceNet tool, see Tables C-1,C-2,and C-3.

98 Micro Motion® Model 2400S Transmitters for DeviceNet™