Kobold KMT-1, Руководство пользователя, Страница: 15 / 36

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Connect the measurement sensor and the evaluation unit to the sensor cable.
Sensor cable
Sensor cable
3.7. Setting the pipe diameter
The flowmeter is factory-set so that the average corrected flow speed is measured in the pipe. The standardized
volumetric flow is calculated by the flowmeter as follows:
V
0
= v
0
* id
2
* π/4 * 3600
V
0
... Standardized volumetric flow [m
3
/h]
v
0
... Standardized flow [m/s]
id ... Internal diameter of pipe [m]
π ... 3,1415
The internal diameter is factory-set to the value acc. table 1. Because the inner diameter of a pipe is not
standardized and varies depending on wall thickness, the actual inner diameter of the pipe must be set with
the Configurator Software! (see page 35)
Table 1: Factory setting for pipe diameter
da
di s
Nominal
diameter
External
diameter
wall thick-
ness
internal
diameter
DN Inch da (mm/inch) s (mm/inch) di (mm/inch)
50 2" 60.3 / 2.37 2.9 / 0.11 54.5 / 2.15
65 2 1/2" 76.1 / 3.0 2.9 / 0.11 70.3 / 2.77
80 3" 88.9 / 3.5 3.2 / 0.13 82.5 / 3.25
100 4" 114.3 / 4.5 3.6 / 0.14 107.1 / 4.22
125 5" 139.7 / 5.5 4.0 / 0.16 131.7 / 5.19
150 6" 168.3 / 6.63 4.5 / 0.18 159.3 / 6.27
200 8" 219.1 / 8.63 6.3 / 0.25 206.5 / 8.13
250 10" 273.0 / 10.75 6.3 / 0.25 260.4 / 10.25
300 12" 323.9 / 12.75 7.1 / 0.28 309.7 / 12.19
350 14“ 355,6 / 14.00 8 / 0.31 339,6 / 13.37
400 16“ 406,4 / 16.00 8,8 / 0.35 388,8 / 15.31
500 20“ 508 / 20.00 11 / 0.43 486 / 19.13
600 24“ 610 / 24.00 12,5 / 0.49 585 / 23.03
700 28“ 711 / 28.00 14,2 / 0.56 682.6 / 26.87