Emerson Micro Motion 1600 - Page 153

Prerequisites
Identify the meter factor(s) that you will calculate and set. You may set any combination of the three meter
factors: mass flow, volume flow, and density. Note that all three meter factors are independent:
• The meter factor for mass flow affects only the value reported for mass flow.
• The meter factor for density affects only the value reported for density.
• The meter factor for volume flow affects only the value reported for volume flow or gas standard volume
flow.
Important
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.
If you plan to calculate the meter factor for volume flow, be aware that validating volume in the field may be
expensive, and the procedure may be hazardous for some process fluids.
Obtain a reference device (external measurement device) for the appropriate process variable.
Important
For good results, the reference device must be highly accurate.
Procedure
1. Determine the meter factor as follows:
a) Use the flow meter to take a sample measurement.
b) Measure the same sample using the reference device.
c) Calculate the meter factor using the following formula:
NewMeterFactor = ConfiguredMeterFactor ×
ReferenceMeasurement
FlowmeterMeasurement
2. Ensure that the calculated meter factor does not fall outside 0.98 and 1.02. If the meter factor is outside
these limits, contact customer service.
3. Configure the meter factor in the transmitter.
Calculating the meter factor for mass flow
The flow meter is installed and validated for the first time. The mass flow measurement from the transmitter
is 250.27 lb. The mass flow measurement from the reference device is 250 lb. The mass flow meter factor is
calculated as follows:
MeterFlow
MassFlow
=1x
250
250.27
= 0.9989
The first meter factor for mass flow is 0.9989.
One year later, the flow meter is validated again. The mass flow measurement from the transmitter is
250.07 lb. The mass flow measurement from the reference device is 250.25 lb. The new mass flow meter
factor is calculated as follows:
MeterFlow
MassFlow
=0.9989x
250.25
250.07
= 0.9996
The new meter factor for mass flow is 0.9996.
Configuration and Use Manual Measurement support
MS-00809-0200-1600 May2024
Configuration and Use Manual 153