ANALYTICAL FLOW TECHNOLOGIES DENSITRAK D625 - Field Calibration Work Table

D625 Users Manual
31
EXAMPLE: Field Calibration - K
0
Density Coefficient Offset Adjustment
Original K
0
Value
K
0(old)
= -0.433394018
Meter fluid Temperature
T
fluid
=
68
°F
Density Reading from D625
Meter
D
meter
=
0.99865
gr/cm
3
Actual Fluid Density
1,2
D
actual
=
0.99740
gr/cm
3
Density Error Offset (E
offset
)
E
offset
= D
actual
– D
meter
→ E
offset
= .99740 - .99865 → E
offset
= -
.00125
Compute New K
0
Value
K
0(new)
= K
0(old)
+ E
offset
→ K
0(new)
= (-.433394018) + (-.00125)
K
0(new)
= -0.434644018
Enter K
0(new)
into the Density processor or flow computer.
1
(Temperature of actual fluid density must be at the same temperature as the meter density
reading)
2
Calibrated Pycnometer, and/or a Hydrometer are examples of acceptable density test
equipment
FIELD CALIBRATION WORK TABLE
Field Calibration: K
0
Density Coefficient Offset Work Table
Original K
0
Value
K
0(old)
=
Meter fluid Temperature
T
fluid
=
°F
Density Reading from D625
Meter
D
meter
=
gr/cm
3
Actual Fluid Density
1,2
D
actual
=
gr/cm
3
Density Error Offset (E
offset
)
E
offset
= D
actual
– D
meter
→ E
offset
=___________-____________
E
offset
=
Compute New K
0
Value
K
0(new)
= K
0(old)
+ E
offset
→ K
0(new)
= ___________+___________
K
0(new)
=
Enter K
0(new)
into the Density processor or flow computer.
1
(Temperature of actual fluid density must be at the same temperature as the meter density
reading)
2
Calibrated Pycnometer, and/or a Hydrometer are examples of acceptable density test
equipment