c) Set the calibration gas selector valve (A) to the calibration gas 2 inlet (I) position. The process
gas inlet valve (D) must remain closed.
d) Activate SCROLL until ENTER GAS HIGH appears, then activate Select.
e) Enter the specific gravity, molecular weight, or relative density of the calibration gas that is
flowing through the system and store the value by activating both SCROLL and SELECT at same
time until the previous menu appears.
f) Activate SCROLL
g) When CAL GAS HIGH appears, activate Select to start the calibration.
h) During the calibration, activate SCROLL to observe the Sensor Time Period and Stability values
during the calibration.
i) Wait between 3 to 15 minutes for the system to stabilize. When Stability is Good, activate
Select.
If measurement does not stabilize after 30 minutes, activate SCROLL to abort the calibration.
j) Activate Select again to accept the calibration value.
k) As the gas flows, select the Start button and observe the Sensor Time Period and Stability
values.
l) Disconnect the lower calibration gas.
9. Activate SCROLL until CALC K VAL appears, then activate Select.
The meter automatically calculates the calibration factors from the stored data.
10. View the calibration factors.
a) When RESULT DISPLAY appears, activate Select.
b) Activate SCROLL to view the calibration factors and data.
Results are displayed in this order:
• The specific gravity, molecular weight, or relative density used to calculate the K0 calibration
factor
• The time period used to calculate the K0 calibration factor
• The specific gravity, molecular weight, or relative density used to calculate the K1 calibration
factor (3-point calibrations only)
• The time period used to calculate the K1 calibration factor (3-point calibrations only)
• The specific gravity, molecular weight, or relative density used to calculate the K2 calibration
factor
• The time period used to calculate the K2 calibration factor
• The K0 calibration factor
• The K1 calibration factor (3-point calibrations only), displayed in exponential format
• The K2 calibration factor, displayed in exponential format
Purging and calibration Configuration and Use Manual
March 2021 MMI-20020954
36 Micro Motion Gas Specific Gravity Meters (SGM)
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