Emerson 4000 manual Heater Strut Assembly

Oxymitter 4000

Instruction Manual

IB-106-340 Rev. 3.0 December 2003

WIRE

LOOP

V-DEFLECTOR

CERAMIC SUPPORT ROD

CERAMIC

DIFFUSER CELL FLANGE

ASSEMBLY

HEATER

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.

Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 9-13