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Hazardous Area
X-STREAM O
Cell Removal
Replace Contact Pad
6-8
Transmitter
2
Use the following instructions to remove the O
cell requires the special tools contained in tool kit PN 6A00290G01.
1. Follow the instructions in "Sensor Core or Diffuser Replacement", steps
1 through 6, to remove the sensor core assembly from the Hazardous
Area X-STREAM O
2. See Figure 6-1. Loosen and remove the setscrews in diffuser (6).
3. At the front of the sensor core assembly, loosen the center-most screw
about 6 turns to relieve the spring tension on the contact and
thermocouple assembly.
NOTE
If removing a ceramic or Hastelloy diffuser be sure to note the orientation of
the rounded deflector so the diffuser can be reinstalled the same way.
4. Remove diffuser (6).
5. Using the cell removal tool and 1/4 inch diameter pin from tool kit
6A00290G01, unscrew cell retainer (5) from core (1).
6. Remove cell (4), corrugated washer (3), and thermal insulator (2).
7. Use compressed air, 30 psig maximum, to blow out any loose pieces of
insulation.
8. Look inside the heater housing and inspect the end of the contact pad
for damage. The pad should be uniform disk shaped with a flat surface
that mates against the surface of the sensing cell.
9. If any of the following damage conditions are found, replace the contact
pad in the contact and thermocouple assembly according to the
procedure that follows. If no damage is found, continue to "Cell
Installation".
• Contact pad missing (still bonded to cell)
• Part of the contact pad missing (still bonded to cell)
• Contact pad mesh unraveled
Replace the contact pad in the contact and thermocouple assembly according
to the following procedure. See Figure 6-5.
1. Disconnect black heater wires (4) from the sensor core connector plug.
2. Remove screw (24) that secures the contact and thermocouple
assembly to the sensor core base (7).
3. Slide contact and thermocouple assembly (5) out of core base (7). If
resistance is felt, gently rotate the assembly in either direction to ease
removal.
4. At the spring end of the ceramic insulator, locate the crimp on the
conductor with blue sleeving. Cut both wires at the crimp to retain
maximum wire length.
5. At the process end of the assembly, pull the wire partially out of the
ceramic insulator and cut the pad from both wires. One of the wires is
short and should be removed from this end.
6. On the spring end of the 4-bore ceramic insulator, pull the remaining
blue-sleeved wire out of the insulator. Make sure both contact and
thermocouple wires are completely removed.
sensing cell. Removal of the
2
Transmitter.
2
Instruction Manual
IM-106-910C, Rev. 1.0
November 2009
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