Emerson Process Management OXYMITTER 4000 - Manual (Page 121)

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 9-3
Hazardous Area Oxymitter 4000
2. Semi-Automatic Calibration. Semi-
automatic calibrations only require
operator initiation. However, the cali-
bration gases must be permanently
piped to the Hazardous Area Oxymitter
4000, an SPS 4000 or IMPS 4000
must be installed to sequence the
gases, and the logic I/O must be set
to mode 8 or 9 via HART/AMS to allow
the sequencer and the Hazardous Area
Oxymitter 4000 to communicate.
Depending on your system setup,
a semi-automatic calibration can be
initiated by the following methods:
(a) Hazardous Area Oxymitter 4000
with membrane keypad. Press the
CAL key on the Hazardous Area
Oxymitter 4000 keypad.
(b) Hazardous Area Oxymitter 4000
with LOI. Select “Start Calib” from
the CALIBRATION menu.
(c) IMPS 4000. Use the IMPS 4000
keypad to change the InitCalX
parameter of the CHANGE PRE-
SETS display mode from 0000 to
0001. Refer to the IMPS 4000
Intelligent Multiprobe Test Gas
Sequencer Instruction Bulletin for
more information.
(d) HART. Use the HART Communi-
cator to access the O
2
CALIBRATE
menu and perform the O
2
CAL
method. Refer to paragraph 7-7 for
the complete calibration procedure.
(e) AMS. Refer to AMS documentation
for more information.
(f) Remote Contact. Initiate a calibra-
tion from a remote location via the
remote contact input connection
provided by an IMPS 4000 or SPS
4000. Refer to the documentation
available for the control system in
use for more information.
Once a semi-automatic calibration is
initiated by any of the methods previ-
ously described, the Hazardous Area
Oxymitter 4000’s CALIBRATION
RECOMMENDED alarm signals an
IMPS 4000 or SPS 4000 to initiate a
calibration. The sequencer sends an
“in cal” signal to the control room so
that any automatic control loops can be
placed in manual. Then, the sequencer
begins to sequence the calibration
gases.
3. Manual Calibration with Membrane
Keypad. Manual calibrations must be
performed at the Hazardous Area
Oxymitter 4000 site and will require
operator intervention throughout the
process. Manual calibration instruc-
tions, in condensed form, can also be
found on the inside of the right elec-
tronics housing cover. See Figure 9-2.
Use the following procedure to perform
a manual calibration:
(a) Place control loop in manual.
(b) Verify the calibration gas parame-
ters are correct per paragraph
9-2a.
(c) If performing a manual calibration
with the CALIBRATION RECOM-
MENDED LED off and the CAL
LED off, start at step 1.
(d) If performing a manual calibration
with the CALIBRATION RECOM-
MENDED LED on and the CAL
LED on, start at step 2.
1 Push the CAL key. The CALI-
BRATION RECOMMENDED
LED will come on and the
CAL LED will be on solid. If a
multimeter is attached across
TP5 and TP6, the reading will
display the percentage of
oxygen seen by the cell.
9