Endress+Hauser Proline Prowirl 72, Руководство по эксплуатации

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Proline Prowirl 72 11 Description of device functions
E Hauser 97
MATING PIPE
DIAMETER The device is able to correct mismatches between inner diameter of piping and inner
diameter of the flowmeter. This functionality can be activated by entering the actual
diameter of the mating pipe in this function (
→
Fig. 28).
If the inner diameter of the mating pipe (d1) and the inner diameter of the flowmeter
(d2) are different, this results in a distorted flow profile.
A mismatch of the inner pipe diameter can be present, if the mating pipework is different
from the flowmeter in:
• pressure rate.
• Schedule (ANSI pipes, e.g. Sched. 80 instead of 40).
• material (DIN pipes).
In order to correct the resulting shift of the instrument‘s calibration factor, enter the
actual inner diameter of the mating pipework (d1) in this function.
A0001982
Fig. 28: Mating pipe (d1)
d1 > d2
d1 = diameter mating pipework
d2 = diameter flowmeter
User input:
5-digit floating-point number
Factory setting:
0
!
Note!
• The inlet correction is switched off if 0 is entered in the function.
• The appropriate unit is taken from the UNIT LENGTH function (
→
Page 76).
• Mismatches between diameters can only be corrected within the same nominal
diameter class (e.g. DN 50 / 2").
• If the standard inner diameter of the process connection ordered for the device and
the inner diameter of the pipe line are different, then an additional uncertainty of
typically 0.1% of measurement per 1 mm difference of diameter has to be allowed for.
Function description PROCESS PARAMETER
d2 d1
Esc
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