Kurz
Instruments, Inc.
831-646-5911
2411 Garden Road
www.kurzinstruments.com
Monterey, CA 93940
360208-F 454FTB, 504FTB, 534FTB
7
In-Line Meter Installation Guidelines
1.
Mount the Meter so its sensing element meets the upstream and downstream requirements of that model:
a.
Kurz Models 504 etc. all need “X” inside pipe diameters upstream and 5 downstream of the sensing element to ensure a
repeatable and accurate reading within 2% of the initial calibration. Double elbows in different planes introduce swirl and
need 50% more distance than a single elbow does. Longer straight runs will reduce this maximum error. Any
discontinuity in the straight pipe flow profile will change the reading compared to its calibration conditions. The data were
initially calibrated using long straight runs with short close-coupled pipe flanges that minimize the line-size discontinuity.
In many applications, field calibration data can be used to reduce the upstream and downstream requirements.
b.
Kurz Model 534 have a built in flow conditioner and all the straight run it needs so there is no upstream or downstream
straight run requirements to achieve the rated accuracy.
2.
If the process fluid is hot or cold compared to the ambient air, then insulation around the pipe/meter upstream for about 30
diameters or more will help reduce thermal gradients in the process fluid near the sensor to avoid these errors. As the temperature
is changed, the thermal inertia of the piping will cause a lag in the thermal profile so a longer stabilization time will be required.
For more information on all the above, please refer to the full product manual provided on CD or at our website www.kurz-
instruments.com
