Siemens SITRANS FUH1010PVX, Руководство по эксплуатации, Страница: 80 / 226

2-14
1010BXFM-3 Section 2
How to Edit the [Density SG] Setting
Use the [Density SG] menu cell to edit the nominal specific gravity of the selected liquid.
This mode suits applications where the density is not only known, but also fixed, due to
well-controlled liquid temperature and chemistry.
The default specific gravity setting is 1.000. The Interface Detector uses the liquid’s specific
gravity to form a multiplier for the conversion to API. API appears (in selected units) on the
display screen. Density (SG) (as it applies to this system) is defined as the ratio of the mass of
this liquid to the mass of an equal volume of water at 20
°
C or 68
°
F.
To edit the [Density SG] setting:
To activate numeric entry press
Use PC numeric keys or Magnetic Wand to type the Density SG value.
To register the data press
2.3.2 ACTIVATING THE LIQUID TABLE
The liquid table is used to associate the measured LiquIdent™ variable (temperature com-
pensation sonic velocity) with user supplied SG and Viscosity. By selecting the [Liquid Table]
you can set the LiquIdent™ Slope, Pressure Slope, fixed reference Base Temperature, K0 and
K1 thermal expansion parameters, and the LiquIdent™ Index.
ENT
To activate the Liquid Table menu:
Press to move the cursor to the [Liquid Table] menu cell.
Use to select No or Yes .
To register the selection press
ENT
Controlotron Dual Path SITE 1
Liquid Table
Table Active No
LiquIdent Slope 2.300
Pressure Slope 0.030
Base Temperature 60.000
K0 341.0957
K1 0.0000
LiquIdent Index 400
Use this menu cell
to activate the
Liquid Table.
Use this menu cell
to set the Pressure
Slope
.
Use this menu cell
to enter the
LiquIdent Index.
Use this menu cell
to set the LiquIdent
Slope. The default
value is 2.300.
Use this menu cell to set
and edit the reference
Base Temperature. A
change in the reference
temperature will affect the
sonic velocity of the liquid.
Use this menu cell
to set the K0 and K1
thermal expansion
coefficients for the
Liquid Class.