Red Seal Measurement Datamate 2200, Руководство по эксплуатации и техническому обслуживанию

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Datamate 2200 O&M
Page 38
7.10 Actual/Standard Volume
The Datamate 2200 calculates actual gross volume and standard volume flow rates
and totals. The actual volume is obtained directly dividing the measured mass by the
measured density. Whereas the standard volume is the equivalent volume at a standard
condition, obtained dividing the measured mass by density of the fluid under the standard
conditions (Standard Density).
NOTE: Standard Volume configuration can be skipped if you wish to use the
measured density to calculate the actual volume or if you will not be using a
volume value in the application.
Brix and Baume are concentration units, but they can be used to calculate standard
volume since they can be related to specific gravity (See equations 7.10.1, 7.10.2 &
7.10.3). Therefore a standard density for the fluid at 60°F can be derived from the density
vs. concentration tables.
If Brix or Baume is selected as the standard density unit, there is no need to input the
Standard Density value granted the correct density vs. concentration tables were input in
the Datamate 2200 (See Section 7.8).
66.1086 384.341
Equation 7.10.1 BRIX = 318.906 +
_______ - _______
SG
2
SG
140
Equation 7.10.2 Be Lt =
____
- 130 for liquids lighter than water (SG < 1.00)
SG
145
Equation 7.10.3 Be Hv =145 -
____
for liquids heavier than water (SG ≥ 1.00)
SG
Standard Volume can also be obtained using API calculations. In this case it will be
obtained by multiplying the actual volume to the Volume Correction Factor for the fluid
at process temperature. The Volume Correction Factor is found in the look-up table
provided for different petroleum products or the custom table that the user can load
(See Section 7.9).