AB-7350-U
7
Measuring range and accuracy
IMPORTANT:
Flow measuring accuracy shown in the below is for the valve sensor measuring 44.6 to 62.6
F (7 to 17 °C) and
113 to149
F (45 to 65 °C) ranges, 29 to 261 psig pipe pressure, and 4.35 to 43.5 psig differential pressure.
Without these ranges, the flow rate measuring accuracy might decrease.
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Item Specification
Flow measuring
Setting range
Model number
Nominal size
Cv value
Max. set flow
FVY5137J0041-S03
1
1
/
2
”
25
66 GPM (250 l/min)
FVY5137J0042-S03
1
1
/
2
”
40
106 GPM (400 l/min)
FVY5137J0051-S03
2”
65
172 GPM (650 l/min)
FVY5137J0061-S03
2
1
/
2
”
95
251 GPM (950 l/min)
FVY5137J0081-S03
3”
125
330 GPM (1250 l/min)
easuring accuracy
(Factory preset)
Notes:
1
Pv is differential pressure between valve inlet pressure (Pvin) and outlet pressure (Pvout).
2 Flow measuring accuracy above may change depending on the conditions including valve positions, differential pressure, etc.
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Item Specification
Valve sensor*
3
Pressure
measuring
Measuring range 0 to 145 psig*
4
Accuracy
0.5 %FS (factory preset) *
5
Temperature
measuring
Measuring range
14 to 212 °F (-10 to 100 °C)
Accuracy
1.8
F (
1
C) (factory preset)*
6
(within 32 to 176
F (0 to 80 °C) measuring range, at -13 to 104
F (25 to 40 °C) temperature difference
between measuring temperature and ambient temperature)
Temperature
measuring of
Pt100 input
Accuracy*
7
Conversion
accuracy:
0.72
F at 32 to 176
F (
0.4
C at 0 to 80 °C) ambient temperature
1.08
F at -4 to 32
F (
0.6
C at -20 to 0 °C) ambient temperature
Error due to wiring length:
0.27
F at 49.2
49.2 ft (
0.15
C at 15
15 m)
in the 32 to 176
F (0 to 80 °C) measuring range
Energy
calculation*
8
(with two
temperature
sensors (Pt100
input) connected)
Accuracy
Temperature
difference b/w
supply and return
water
Flow measuring accuracy*
9
5 %RD
7 %RD
10 %RD
1 %FS
3 %FS
T = 9.0
F (5
C)
25 %RD
27 %RD
29 %RD
21 %FS
23 %FS
T = 18
F (10
C)
15 %RD
17 %RD
20 %RD
11 %FS
13 %FS
T = 27
F (15
C)
12 %RD
14 %RD
17 %RD
8 %FS
10 %FS
Notes:
3 Valve sensor is the temperature and pressure sensors mounted onto the valve (Model FVY5137J), measuring valve surface temperature
and inlet and outlet flow pressure.
4 When you test the withstand pressure, up to 232 psig pressure can be applied to the valve sensor.
5 The above pressure measuring accuracy is for the 44.6 to 149 °F (7 to 65 °C) flow temperature. If the flow temperature is out of the 44.6 to
149 °F (7 to 65 °C), the valve sensor flow measuring accuracy may decrease.
6 For accurate measuring of flow temperature, thermal insulation is required. Refer to the subsection
Heat insulation
for applying thermal
insulation.
7 Overall accuracy is calculated based on the sensing accuracy of the temperature sensors connected, the conversion accuracy, and the
error due to wiring length.
8 Energy calculation accuracy is calculated from the flow measuring accuracy at 1.8 °F (1 °C) measuring error of the temperature difference.
9 The flow measuring accuracy in the table corresponds to the data shown in the above flow measuring accuracy graph.
