Emerson Rosemount 928 Reference Manual page 54

Configuration
August 2018
18. Wait while the gas concentration measurement stabilizes.
19. Select OK when the gas concentration measurement stabilizes at or near the target
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shown on the device display may not exactly match that shown on the label of the
target gas source.
Refer to the following figure.
Figure 2-5: Typical Calibration Profile
A. Gas concentration ppm
B. Time (in seconds)
C. Gas concentration measurement has stabilized.
gas concentration level.
Reference Manual
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Rosemount 928