Emerson Process Management OXYMITTER 4000 - Manual (Page 123)

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 9-5
Hazardous Area Oxymitter 4000
calibration). If the slope or the
constant is out of specifica-
tion, a diagnostic alarm LED
will be flashing. The diagnos-
tic alarm will remain active
until the purge cycle is over. If
the three pattern flash occurs
without a diagnostic alarm, the
calibration gases could be the
same or the calibration gas
was not turned on.
A flashing CAL LED indicates
the calibration is done. (See
Section 8, TROUBLE-
SHOOTING, for an explana-
tion of the 2 pattern and 3
pattern flashes).
7 Remove the second calibra-
tion gas and cap off the cali-
bration gas port.
8 Push the CAL key; the CAL
LED will be on solid as the
unit purges. (Default purge
time is three minutes). When
the purge is complete, the
CAL LED will turn off and the
Hazardous Area Oxymitter
4000 output unlocks from its
held value and begins to read
the process O
2
.
If the calibration was valid, the
DIAGNOSTIC ALARMS LEDs will
indicate normal operation. If either
new calibration value (slope or
constant) is not within parameters,
the DIAGNOSTIC ALARMS LED
will indicate an alarm. (See Section
8, TROUBLESHOOTING, for alarm
codes). If the calibration was inva-
lid, the Hazardous Area Oxymitter
4000 will return to normal opera-
tion, as it was before a calibration
was initiated, and the parameters
will not be updated.
(e) Place control loop in automatic.
9-3 CALIBRATION – HAZARDOUS AREA
OXYMITTER 4000 WITH LOI
Refer to Figure 6-4 for a view of the LOI menu
tree. To calibrate the Hazardous Area Oxymitter
4000 from the LOI, access the CALIBRATION/
Start Calibration menu.
a. CALIBRATION/ Start Calibration
This is the starting point for calibrations. The
LOI will instruct the user through this entire pro-
cedure. You can select “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
9