Test Results - Panametrics Sentinel User Manual

1.6.3

Test Results

Testing and analysis show that the meter, in conjunction with a flow conditioning plate, installed as described above,
can tolerate the following upstream disturbances:
• Simple straight pipe runs (minimal internal pipe disturbances)
• Single elbow
• Double elbows, in plane
• Double elbows, out of plane
Table 7 below lists the test results of a Sentinel Flow Measurement System installed in a straight run of pipe,
compared to the requirements of AGA9.
Category
% Error
Max Peak-To-Peak Error
Repeatability
Resolution
Velocity Sampling Interval
Zero Flow Reading
Testing with the meter installed with the other pipe configurations listed above, shows that the meter continues to
meet the requirements of AGA9. The error percentage is never more than 0.3% additional uncertainty for such
upstream configurations.
Testing also shows that variations of pressure, temperature and natural gas composition, within the range of the
AGA9 specifications, do not affect Sentinel accuracy in meeting AGA9 requirements.
Sentinel™ User's Manual
Sentinel AGA9 Requirements
± 0.5%
0.4%
± 0.2%
0.003 ft/sec
0.2 sec
 0.007 ft/sec
± 1.0%
0.7%
± 0.2%
0.003 ft/sec
 1 sec
< 0.040 ft/sec
Chapter 1. Installation
11