TYPICAL LIQUID LEVEL INSTALLATIONS Transmitter Connected to Open Tank Calibrated Range
=
160
to
800
Input Data Entry
mmH2O
Calculation Result Span
=
640
(X)
x
800
(GL) 0.8
MAXIMUM LEVEL HW, MIN
=
160 X =
800
HW, MAX
mm
(Y)
x
200 =
800
(X) 800
(GL) 0.8
+
(Y)
x
200
(GL) 0.8
CALIBRATION DATA MINIMUM LEVEL Y =
200 GL =
%
mm 0.8
g/cm3
Input Simulation
Output Result
mm H2O
mA
0
160.00
4.00
25
320.00
8.00
50 75 100
480.00 640.00 800.00
12.00 16.00 20.00
Notes HW = Equivalent Head of Water HW,MIN = HW at minimum liquid level HW,MAX = HW at maximum liquid level
GL = Specific gravity of tank liquid
TYPICAL LIQUID LEVEL INSTALLATIONS Transmitter Connected to Closed Tank with Dry Leg Calibrated Range
=
262.5
5512.5 mmH2O
to
Input Data Entry
Calculation Result Span
=
5250
(X)
x
5000
(GL) 1.05
MAXIMUM LEVEL HW, MIN
=
(Y)
262.5 X =
5000
HW, MAX
mm
250 =
5512.5
Dry Leg
x
(X) 5000
(GL) 1.05
+
(Y)
x
250
CALIBRATION DATA MINIMUM LEVEL Y =
250 GL =
mm 1.05
Input Simulation
%
g/cm3
Output Result
mm H2O
mA
0
262.50
4.00
25
1575.00
8.00
50 75 100
2887.50 4200.00 5512.50
12.00 16.00 20.00
Notes HW = Equivalent Head of Water HW,MIN = HW at minimum liquid level HW,MAX = HW at maximum liquid level
GL = Specific gravity of tank liquid
(GL) 1.05
TYPICAL LIQUID LEVEL INSTALLATIONS Transmitter Connected to Closed Tank with Wet Leg Calibrated Range
=
-4137.5
to
mmH2O
1112.5
Input Data Entry
Calculation Result Span
=
5250
(X)
(GL)
x
5000
1.05
MAXIMUM LEVEL HW, MIN
=
-4137.5
Y
x (GL)
250
-
D
(GS)
1.05
0.8
5500
Y )
(GL)
250
1.05
GS D
5500
0.8
Wet Leg
X =
5000
HW, MAX
mm
1112.5
=
( X
+
5000
### CALIBRATION DATA MINIMUM LEVEL Y =
250 GL =
%
mm 1.05
g/cm3
Input Simulation
-
D
(GS)
0.8
5500
### Output Result
mm H2O
mA
0
-4137.50
4.00
25
-2825.00
8.00
50 75 100
-1512.50 -200.00 1112.50
12.00 16.00 20.00
Notes HW = Equivalent Head of Water
D = Height of wet leg
HW,MIN = HW at minimum liquid level
GL = Specific gravity of tank liquid
HW,MAX = HW at maximum liquid level
GS = Specific gravity of wet leg liquid
TYPICAL LIQUID DENSITY INSTALLATIONS Transmitter Connected to Open Tank With Constant Level Calibrated Range
=
4000.0
5400.0 mmH2O
to
Input Data Entry
Calculation Result
INPUT
Span
=
1400
OVER FLOW
HW, MIN
X =
5000
mm
5400
GMIN =
0.8
g/cm3
GMAX =
1.08
g/cm
x
5000 =
4000 HW, MAX
(X)
X
X 5000
-
GMIN )
1.08 x
5000 =
( GMAX
0.8
GMIN 0.8
x
GMAX 1.08
CALIBRATION DATA
3
%
0 25 50 75 100
Input Simulation
Output Result
mm H2O
mA
4000.00 4350.00 4700.00 5050.00 5400.00
4.00 8.00 12.00 16.00 20.00
Notes HW = Equivalent Head of Water
GMIN = Minimum Specific gravity of tank liquid
HW,MIN = HW at minimum density
GMAX = Maximum Specific gravity of tank liquid
HW,MAX = HW at maximum density
GS = Specific gravity of wet leg liquid
TYPICAL LIQUID DENSITY INSTALLATIONS Transmitter Connected to Open Tank With Varying Level Calibrated Range
=
4.0
to
6.0
mmH2O
Input Data
Calculation Result Span
=
(X)
2
x
2
( GMAX
-
4
GMIN ) 3
MINIMUM LEVEL HW, MIN
=
4
X
x
2
( GMIN
-
3
GS) 1
GS
HW, MAX
1 Wet Leg
X =
2
mm
=
6
GMIN =
3
g/cm3
GMAX =
4
g/cm
3
X 2
x
( GMAX
-
4
GS ) 1
CALIBRATION DATA %
0 25 50 75 100
Input Simulation
Output Result
mm H2O
mA
4.00 4.50 5.00 5.50 6.00
4.00 8.00 12.00 16.00 20.00
Notes HW = Equivalent Head of Water
GMIN = Minimum Specific gravity of tank liquid
HW,MIN = HW at minimum density
GMAX = Maximum Specific gravity of tank liquid
HW,MAX = HW at maximum density
GS = Specific gravity of wet leg liquid
TYPICAL LIQUID INTERFACE LEVEL INSTALLATIONS Transmitter Connected to Open Tank With Constan Overflow Calibrated Range = 590.0
to
690.0
mmH2O
Input Data Entry
Calculation Result Span
OVER FLOW
A =
30
mm
100
500
1
X
=
( Y
590
mm
=
( Y
690
50
-
1.2 GMAX )
x
50
HW, MAX
g/cm3
( GMAX
x
500
HW, MIN
MAXIMUM INTERFACE
GMIN =
=
1
+
1.2
+
X )
GMIN )
( A
+
30 x
500
GMAX 1.2
X )
x
500
+
( A 30
GMIN 1
x
GMIN ) 1
X CALIBRATION DATA GMAX = Y =
1.2 50
g/cm mm
3
MINIMUM INTERFACE
Input Simulation
Output Result
mm H2O
mA
0
590.00
4.00
25 50 75 100
615.00 640.00 665.00 690.00
8.00 12.00 16.00 20.00
%
Notes HW = Equivalent Head of Water
GMIN = Minimum Specific gravity of upper (lighter) liquid
HW,MIN = HW at minimum interface
GMAX = Maximum Specific gravity of lower (heavier) liquid
HW,MAX = HW at maximum interface
GS = Specific gravity of wet leg liquid
A = Distance constan overflow and desired maximum interface
TYPICAL LIQUID INTERFACE LEVEL INSTALLATIONS Transmitter Connected to Closed Tank With Wet Leg Calibrated Range =
105.9
to
183.9
mmH2O
Input Data Entry
Calculation Result Span
MINIMUM LEVEL
A =
50
0.8
X
( GMAX
x
600
HW, MIN
mm
MAXIMUM INTERFACE GS
=
78 =
( Y
105.9
-
1.08 GMAX )
x
30
GMIN ) 0.95
+
1.08
( A
+
50
X )
x
600
GMIN
-
0.95
( A
+
50
X
+
600
Y )
x
30
GS 0.8
g/cm3 GMIN =
0.95
HW, MAX
g/cm3 X =
600
mm
=
( Y
183.9
30
+
X )
x
600
GMAX 1.08
+
( A 50
x
GMIN ) 0.95
CALIBRATION DATA GMAX =
1.08
g/cm
3
MINIMUM INTERFACE
% Y =
30
mm
Input Simulation
Output Result
mm H2O
mA
0
105.90
4.00
25 50 75 100
125.40 144.90 164.40 183.90
8.00 12.00 16.00 20.00
Notes HW = Equivalent Head of Water
GMIN = Minimum Specific gravity of upper (lighter) liquid
HW,MIN = HW at minimum interface
GMAX = Maximum Specific gravity of lower (heavier) liquid
HW,MAX = HW at maximum interface
GS = Specific gravity of wet leg liquid
A = Distance minimum level and desired maximum interface
-
( A 50
+
X 600
+
Y ) 30
x
GS 0.8
