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12 Specifications
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12.1 Measuring accuracy
12.1.1 Reference conditionsper EN 29104
Fluid temperature
Ambient temperature
Power supply
Installation conditions
Warm-up phase
12.1.2 Maximum measuring error
Pulse output
DN 1 ... DN 2 (1/25 ... 1/12"):
± 1% of measured value, ± 0.001 Q
DN 3 ... DN 1000 (1/10 ... 40"):
Q > 0.05 Q
± 0.5% of measured value
maxDN
Q < 0.05 Q
± 0.00025 Q
maxDN
Q
= maximum flowrate for the flowmeter size 10 m/s
maxDN
Analog output effects
Same as pulse output plus ±0.1% of rate ±0.01 mA
6,0 %
5,0 %
4,0 %
Y
3,0 %
2,0 %
1,0 %
0,0 %
0
2
4
0
6,5
13,1
Fig. 59
Y
Accuracy ± of rate
X
Flow velocity v
D184B140U02
20 °C (68 °F) ± 2 K
20 °C (68 °F) ± 2 K
Line voltage as per name plate
U
± 1 %
N
Upstream > 10 x DN
straight section
Downstream > 5 x DN
straight section
DN = Flowmeter sensor size
30 min
maxDN
maxDN
DN 1...2
(1/25...1/12")
DN 3...1000
(1/10...40")
6
8
10 m/s
19,7
26,2
32,8 ft/s
X
G00456
FSM4000
Specifications
115
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