Conversion Chart - Badger Meter Hedland Flow-Alert User Manual

CONVERSION CHART

The conversion chart provides a series of simplified mathematical formulas to adjust the
graduated scale for changes in pressure
gravity (Table 7)
N OTE:
Special scales can be made to accommodate other pressures, temperatures and
specific gravity
The conversion chart can also be used to adjust the multi-pressure flow scale to indicate
flow rates in applications beyond the parameters stated on the scale
To adjust the pressures beyond (above or below) scale limits:
1 Locate the point at which the brightly colored indicator line intersects the vertical 100
Psig pressure line
2 Divide this reading by the pressure correction factor (f
To adjust for changes in temperature:
1 Divide the 100 Psig flow rate reading by the temperature correction factor (f
To adjust for changes in specific gravity:
1 Establish the square root of the new specific gravity
2 Divide the 100 Psig flow rate reading by the Specific Gravity Correction Factor (f
Conversion Chart
Determine flow rates using different pressures and temperatures
scfm actual ( ) =
psig
25
BAR
17
kPa
172
f
1700
1
114 7
=
f
1
14 7 .
°F
+10
°C
–122
f
0942
2
=
f
2
April 2017
scfm indicated ( )
f x f x f
1 3
2
50 75 100
35 52 69
345 517 689
1331 1131 1000
.
+
psig
Table 5: Pressure correction factor
+30 +50 +70
–11 +909 +210
0962 0981 1000
+ °
460 F
530
Table 6: Temperature correction factor
Table 7: Specific gravity correction factor
VAM-UM-00646-EN-04
(Table 5), temperature
f = conversion factor for inlet pressure
1
Where: f = conversion factor for inlet temperature
2
f = conversion factor for inlet specific gravity
3
125 150
86 104
862 1034
0902 0835
7 914 .
=
f
1
+
1 014 . BAR
+90 +110
+321 +43
1018 1037
=
f Sp Gr . .
3
(Table 6), and/or specific
) indicated in Table
1
175 200
121 138
1207 1379
0778 0731
790 857
=
f
1
101 357 .
+130 +150
+54 +65
1055 1072
+ °
273 C
=
f
2
293
Conversion Chart
5
)
2
)
3
225 250
155 172
1551 1724
0692 0658
.
+
kPa
+170 +190
+76 +88
1090 1107
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