Emerson OXYMITTER 4000 - Manual (Page 133)

Instruction Manual
IB-106-340 Rev. 3.0
December 2003
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 9-5
Oxymitter 4000
9-3 CALIBRATION – OXYMITTER 4000 WITH A
LOCAL OPERATOR INTERFACE (LOI)
Refer to Figure 6-4 for 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 O
2
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 O
2
.
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.