Emerson Rosemount 928 Reference Manual page 47

Reference Manual
00809-0100-4928
7. Acknowledge the warning. If necessary, remove the loop from automatic control.
8. When calibrating for H
Rosemount 928
S and CO, expose the sensor to clean air, to zero the reading.
2
When calibrating for O , expose the sensor to 0% oxygen concentration calibration
2
gas to be used as the "zero" calibration value. If the ambient air may contain trace
amounts of target gas or other gases (for example, carbon monoxide from engine
exhaust) that may interfere with zeroing the device, do the following:
a) Obtain a cylinder of verified clean air (H
concentration calibration gas (O
tubing, 3/16-in. ID, 5/16-in. OD).
b) Install a regulator on the clean air/percent known oxygen content gas
cylinder.
S and CO) or a cylinder of 0% oxygen
2
) and a length of calibration tubing (PVC
2
Configuration
February 2023
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