Emerson OXYMITTER 4000 - Manual (Page 141)

Instruction Manual
IB-106-340 Rev. 3.0
December 2003
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 9-13
Oxymitter 4000
CERAMIC SUPPORT ROD
CELL FLANGE
CERAMIC
DIFFUSER
ASSEMBLY
V-DEFLECTOR
HEATER
WIRE
LOOP
22220050
Figure 9-8. Heater Strut Assembly
and heater connecting cables (8 and 9)
from heater strut assembly (1, Figure
9-3).
4. Remove the four screws (7, Figure
9-3). Remove the probe from the
housing (21).
NOTE
If the Oxymitter 4000 is equipped with
an integrally mounted SPS 4000 and
installed in corrosive conditions,
stainless steel gas tubes are used in-
stead of silicon or Teflon tubes.
5. Remove tube clamps (29) and silicon
tubes (28) from the CAL and REF gas
ports and the CAL and REF gas lines.
6. Loosen, but do not remove, the three
screws (30, Figure 9-3). The spring
tension will release and the heater strut
assembly should move up.
7. When the spring tension is released,
remove the three screws (30). Grasp
the wire loop and carefully slide the
heater strut assembly (Figure 9-8) out
of the probe tube.
8. When replacing the strut, orient the
probe so the small calibration gas tube
is at the 6 o’clock position of the probe
tube. Align the slot on the heater plate
with the calibration gas line in the
probe tube. Slide the strut into the
probe tube. It will turn to align the hole
on the back plate of the strut with the
calibration gas line. When the hole and
the calibration gas line are aligned cor-
rectly, the strut will slide in the rest of
the way.
9. As the strut installation nears comple-
tion, install the guide rod into the cali-
bration gas tube to assist in guiding the
calibration gas tube through the hole in
the end of the strut.