Measuring Accuracy - RMG TME400-VM VMF Series Operating Manual

1 Introduction
According to DIN30690-1, the maximum operating pressure for non-flammable gases
may not exceed 16 bar; for flammable gases, EN746-2 defines a maximum pressure
of 5 bar for DN25 and 2 bar for DN40. Usually these pressure restrictions are speci-
fied on a plate on the pipe fittings.
32
1.4.2.9.
The following error limits apply within the permissible measuring range:
DN Qmin
[m³/h]
25
40
80
50
80
100
80
100
Note
With a slightly smaller measuring range of 1:16, turbine meters are also avail-
able in nominal diameters DN 80 and DN 100, which have an increased accu-
racy with a deviation of max. ±1% in the range of 0.2 x Q
150
200
250
Manual TME400-VMF · EN07 · December, 7

Measuring accuracy

Qmax MR
[m³/h]
2.5 25 1:10
6 70 1:12
13 160 1:12
6 100 1:16
16 250 1:16
25 400 1:16
25 400 1:16
40 650 1:16
13 250 1:20
20 400 1:20
20 400 1:20
32 650 1:20
32 650 1:20
50 1000 1:20
80 1600 1:20
80 1600 1:20
125 2500 1:20
125 2500 1:20
200 4000 1:20
Measurement deviation in the range of
Qmin-0,2 x Qmax
[%]
3
3
3
3
3
3
2
2
3
3
3
3
2
2
2
2
2
2
2
th
2020
0,2 x Qmax-Qmax
[%]
2
1.5
1.0
1.5
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
-Q .
max max
1
1
1
1
1
1
1