Configure Energy Content Measurement Using The Field Communicator - Emerson Micro Motion SGM Series Configuration And Use Manual

Configure process measurement using the Field Communicator
Table 8-3: Specific gravity and molecular weight meters: Compressibility Method and valid ranges for
process variables
Compressibility
Method Temperature Pressure
AGA NX-19 −40 to
+115.556 °C
AGA NX-19 Mod −40 to
+115.556 °C
AGA NX-19 Mod 3 0 to 30 °C
Table 8-4: Relative density meters: Compressibility Method and valid ranges for process variables
Compressibility
Method Temperature Pressure
SGERG-88
−30 to
+100 °C
(1) The sum of CO2 and N2 must be less than 50%.
8.3.3 Configure energy content measurement using the
Field Communicator
The energy content parameters are used to measure and calculate calorific value, Wobbe
index, and energy flow.
Prerequisites
You must be able to supply gas composition data to the meter, for the following
constituents:
•
•
•
•
Gas composition must be measured in % by volume.
If you plan to measure energy flow, you must be able to supply flow data to the meter. You
have the following options:
•
•
80
1.01325 to
345.751 BarA
0 to 137.9
BarA
0 to 80 BarA
0 to 120 BarA
Carbon monoxide (CO)
Carbon dioxide (CO2)
Nitrogen (N2)
Hydrogen (H2)
If you are using an external volume flow device, Volume Flow (External) and Mass
Flow (Calculated) are available.
If you are using an external mass flow device, Mass Flow (External) and Volume Flow
(Calculated) are available.
Valid range
Specific
gravity % CO2
0.55 to 1 0–15%
0.554 to 0.75 0–15%
0.554 to 0–2.50%
0.691
Valid range
Relative
density % CO2
(1)
0.55 to 0.9 0–30%
®
Micro Motion
% N2 % H2
0–15% 0–15%
0–15% N/A
0–7% 0–4%
% N2 % H2
(1)(1)
0–50% N/A
Gas Specific Gravity Meters (SGM)