User's Manual

2-15
1010NFM-3J
Section 2
The table is built by inputting a series of data points—two inputs and two outputs each:
z Input data consists of sonic velocity (Vs) and temperature.
z Output data consists of specific gravity (S.G.) and viscosity (cS) at the specified Vs and tem-
perature.
Ideally, each point contains four empirically derived values. However, when enough data exists to per-
mit it, the table editing routine interpolates missing values based on prior user-entered data.
The UniMass feature expands the basic utility of the flowmeter by synergistically combining its ability to
measure sonic velocity and temperature with user-provided data regarding the process liquid or family
of liquids. The resulting instrument is virtually a liquid analyzer, in addition to measuring mass flowrate
and automatically compensating for viscosity variation.
UniMass Table operations are most successfully employed when the application liquids or family of
liquids are fairly well-controlled. Basic table data can be obtained by a variety of means:
z From handbooks of physical or chemical data.
z Directly measured in the laboratory using your 1010, its RTD temperature sensor and a non-
flowing measurement cell (standpipe).
z After installation on the process pipe if specific gravity and/or viscosity data regarding the liquid
can be locally obtained via samples or from on-line instrumentation.
Although the UniMass Table is designed to permit both temperature and sonic velocity to be active
input variables, UniMass provides Constant Vs and Constant Temp table editing capabilities as well.
The resulting lookup function then associates specific gravity and/or viscosity with either temperature
or sonic velocity only.
APPLICATION DATA MENU EXPLANATIONS FOR UniMass TABLE
The UniMass Table resides within the Application Data menu, however, in Flow Tube (FT) instruments
it resides within the [Liquid Data] menu.
[UniMass Table] - Press the <Right Arrow> to access the UniMass data point editor.
[Disable] - Press the <Right Arrow> to access tables and enable UniMass routine.
The currently active table will be shown highlighted next to the [UniMass Table] menu cell. If no table is
active then [Disable] will appear highlighted next to the [UniMass Table] menu cell.
[Constant Temp] - Press the <Right Arrow> to access. The [Constant Temp] UniMass Table can be
used for multiple liquid applications with tightly controlled constant temperature or single liquid applica-
tions with varying temperature (ideal if temperature is not measured).
This function simply associates changes in liquid sound velocity with changing SG and Viscosity.