Emerson Network Router Manuel D’Utilisation

70

®

 II Software for Micro Motion

®

 Transmitters

The result of the meter verification test will be a percent uncertainty of normalized tube stiffness. The 
default limit for this uncertainty is ±4.0%. This limit is stored in the transmitter, and can be changed 
with ProLink II if necessary by clicking the arrow in the 

box and 

selecting a value between 0.1 and 5 %. For most installations, it is advisable to leave the test limits at 
the default value.

During meter commissioning, Micro Motion recommends performing meter verification several times 
over a range of process conditions. This will establish a baseline for how widely the verification 
measurement varies under normal circumstances. The range of process conditions should include 
expected temperature, pressure, density, and flow rate variations. The default stiffness specification 
uncertainty limit of ±4.0% should avoid false Fail results over the entire range of specified process 
conditions. If the process variation observed during your meter commissioning is much different than 
4%, you may adjust the specification limit to match your process variation. In general, to avoid false 
Fail results, make sure that the specification limits are set to a value around twice the variation due to 
the range of normal process conditions.

Once you have entered the necessary information and checked the uncertainty limit, click on 

.

The Start panel, shown in Figure 6-3, allows you to initiate and monitor the meter verification 
process.