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Hazardous Area
X-STREAM O
Replacing Gas/Air
Hoses, O-rings and
Spacers
Electronics Board
Replacement
6-14
Transmitter
2
Use the procedure that follows to replace the gas and reference air hoses.
1. See Figure 6-1. Remove left housing cover (18) to access the core.
2. Remove three screws (19).
3. Disconnect the sensor connector plug from electronics board (8). Pull
on the connector lanyard as shown in Figure 6-2.
NOTE
A connector plug with lanyard replacement kit is available in case the sensor
connector plug is worn or damaged. Refer to Section 7: Replacement Parts
for the replacement kit part number.
4. Disconnect cal gas and reference air hoses (Figure 6-3) from lower left
and lower right ports in core assembly front plate.
5. See Figure 6-4. Use the bail wire at the front of sensor core assembly to
pull the assembly from probe tube.
NOTE
If pulling of the core assembly is difficult, screws (19, Figure 6-1) may be
inserted into the threaded holes in the front plate and evenly tightened to
"jack" the core assembly out. Longer screws (5/8 inch long) are provided in
the part replacement kit. It is possible to replace the gas and air hoses,
spacers and O-rings without having to remove the core from the probe tube.
6. Remove and replace hoses and clamps (25, 26, and 27, Figure 6-5).
7. Connect the sensor core plug to electronics board (8).
8. Recalibrate the probe per "O2 Calibration" in Section 4: Startup and
Operation.
1. See Figure 6-1. Loosen and remove the lock clip (22) from the cover
lock slots.
2. Remove right cover (12) to uncover the electronics assembly.
3. Disconnect the power and signal wires from electronics board (8).
4. Remove left cover (18) to access the heater and cell connectors.
5. Disconnect the sensor core connector plug from electronics board (8).
6. Remove four mounting screws (14), lock washer (15), and flat washers
(16). Carefully remove electronics board (8) from the electronics
housing. Thermal pad (17) should be removed with the electronics
board.
7. Carefully align new electronics board (8) in the right side of the
electronics housing.
8. Make sure thermal pad (17) is correctly positioned on the back side of
the electronics board. Refer to Figure 6-11.
9. Install single flat washer (16, Figure 6-1), four lock washers (15), and
mounting screws (14). Tighten mounting screws.
Instruction Manual
IM-106-910C, Rev. 1.0
November 2009
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