RMG TME400-VM, Operating Manual

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1 Introduction
Manual TME400-VMF · EN07 · December, 7
th
2020
33
300 200 4000 1:20 2 1
325 6500 1:20 2 1
400 325 6500 1:20 2 1
500 10000 1:20 2 1
500 500 10000 1:20 2 1
800 16000 1:20 2 1
600 800 16000 1:20 2 1
1250 25000 1:20 2 1
1.4.2.10.
Pressure loss
The measuring parts for determining pressure loss are 1 x DN upstream and down-
stream of the meter. The pressure loss is calculated according to the following for-
mula:
where:
D
p pressure loss [mbar]
Z
p
coefficient of pressure loss [-]
r
density [kg/m³]
Q
m
volume flow rate at measurement conditions [m³/h]
DN nominal diameter [mm]
Device type Z
p
Turbine meter TME400 5040
Perforated plate straightener L1 according to ISO/DIN 3150
Perforated plate straightener L2 according to ISO/DIN 6300
Perforated plate straightener L3 according to ISO/DIN 9450
Perforated plate straightener LP-35 RMG standard 1260
Bend straightener RB 19 according to ISO/DIN 1260
The values for Z
p
are rough averages. The exact value is calculated from the pres-
sure loss, which is determined when testing the meter.
4
2
m
p
DN
Q
Z p
× r × = D