Emerson 4000 manual CALIBRATION/ Start Calibration, Apply Gas Hit E when ready, Purgexxxxs

Oxymitter 4000

Instruction Manual

IB-106-340 Rev. 3.0 December 2003

9-3 CALIBRATION – OXYMITTER 4000 WITH A LOCAL OPERATOR INTERFACE (LOI)

Refer to Figure 6-4for a view of the LOI menu tree. To calibrate the Oxymitter 4000 from the LOI, access the CALIBRATION/Start Calibration menu.

a.CALIBRATION/ Start Calibration

This is the starting point for calibrations us- ing the LOI. The LOI will instruct the user through this entire procedure. You can se- lect “Abort Calib” at any time to abort the calibration.

1.The LOI displays the following:

Apply Gas 1

Hit E when ready

The Oxymitter 4000 is ready to accept the first calibration gas. Apply the first calibration gas. (Electronics will abort the calibration if this step is not done within 30 minutes).

2.Touch the Enter key to start the Gas 1 flow. A timer is activated to allow the calibration gas adequate time to flow (default time of five minutes). The LOI displays:

Flow Gas 1xxxxs Read Gas 1xxxxs Done Gas 1

The display counts down the seconds remaining to flow Gas 1, then the time remaining for sensing the O2 concen- tration of Gas 1. Done Gas 1 indicates completion.

3.Remove the first calibration gas and apply the second calibration gas. (Electronics will abort the calibration if this step is not done within 30 min- utes). The LOI displays the following:

Apply Gas 2

Hit E when ready

4.Touch the Enter arrow to start the Gas 2 flow. The timer is activated and the LOI displays:

Flow Gas 2xxxxs

Read Gas 2xxxxs

Done Gas 2

Stop Gas

Hit E when ready

5.Remove the second calibration gas and cap off the calibration gas port. Then, touch the Enter arrow to indicate completion. The timer is activated and the LOI displays:

Purgexxxxs

The default purge time is three min- utes. When the gas purge timer times out, the Oxymitter 4000 begins to read the process O2.

b.Abort Calibration

Exits the calibration. After gases are re- moved, and the purge times out, the instru- ment goes back to normal operational mode.

c.Cal Constants – Results of the Calibration

1.Current calibration – If the calibration passed these values will be updated. Log these values onto the calibration log sheet supplied. If the process has high levels of particulate, note the re- sponse back to the process after cal gas is removed, also.

2.Previous Calibration – Values from the prior good calibration

3.Failed Calibration – Bad calibration values are not loaded into the elec- tronics

d.Calibration Status

1.Calibration Step – The current step in an active calibration procedure.

2.Calibration Time – Time until the next scheduled calibration.

3.Next O2 Cal – Time until the next O2 calibration, if different than the next scheduled calibration.

Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 9-5