Emerson Micro Motion SGM - Page 42

Option Description
3-Point Calibration Appropriate for gases with three main constituents. Use only if recommended by
customer support. For more information, see Three-point calibration.
5. Select the number of the calibration that you want to perform and select Send.
NOTICE
If the information is not sent, then the calibration gas information is not set correctly and the
corresponding K factors will not be calculated.
The device can store up to four independent calibration ranges. All calibrations must have the same
calibration type (2-point or 3-point). Each calibration can use different calibration gases.
6. Enter data for each calibration gas.
a) Choose Setup Calibration and choose the calibration gas you are describing.
b) Select the calibration gas from the list for Calibration Gas Low and Calibration Gas High. If it is
not listed, select Other.
c) Enter the specific gravity, molecular weight, or relative density of the calibration gas for
Calibration Gas Low and Calibration Gas High.
Tip
Enter the calibration gases in order of density, from lowest to highest. This allows heavier gases to
replace lighter gases.
7. Set the low-density calibration point. See Figure 5-2.
a) Connect the lower calibration gas to the calibration gas inlet 1 (H).
b) Set the pressure regulator on the lower calibration gas tank to the appropriate sample pressure
for your installation.
Note
Make sure the process gas inlet valve (D) is closed.
c) Set the gas selector valve (A) to the calibration gas inlet 1 position and open the outlet valve (C).
d) Choose Start Calibration and choose the calibration gas you are using, then select OK.
e) As the gas flows, select the Start button and observe the Sensor Time Period and Stability
values.
f) Wait between 3 to 15 minutes for the system to stabilize. When Calibration Point is Good, select
OK.
If measurement does not stabilize after 30 minutes, select Abort and troubleshoot the problem.
g) Close the calibration valve.
h) Disconnect the lower calibration gas.
8. Set the high-density calibration point.
a) Connect the higher calibration gas to the calibration gas 2 inlet (I).
Purging and calibration Configuration and Use Manual
March 2021 MMI-20020954
42 Micro Motion Gas Specific Gravity Meters (SGM)