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Instruction Manual
IM-106-340AC-1, Rev. 1.0
April 2005
4-3
SPS 4001B
REMOVE/INSTALL
CHASSIS
Perform the following procedures to remove the SPS 4001B chassis from the
enclosure for service, and to reinstall the chassis after the service tasks are
completed.
Removal
1. Loosen the SPS 4001B cover screws and open the cover.
2. Shut off the calibration gas and reference air to the SPS 4001B.
Disconnect all pneumatic lines at the SPS 4001B manifold.
3. Refer to Figure 2-2. Disconnect all wires from the chassis terminals and
remove the power cable ground lead from the ground lug.
4. Refer to Figure 4-1. Remove two screws (18) that secure chassis (24) to
manifold (13).
5. Loosen captive screw (1) that secures chassis (24) to enclosure.
6. Place one hand on the front of chassis (24) and tip the enclosure
up-side-down. Remove chassis from enclosure and place chassis and
enclosure on work surface.
Installation
1. Push up on the base of the fitting installed at the bottom of reference air
pressure regulator (22, Figure 4-1). Pull teflon tubing (21) from the
fitting.
2. Stand chassis (24) and enclosure upright and carefully place the
chassis in the enclosure.
3. Tighten captive screw (1).
4. Install and tighten two screws (18) to secure the base of the chassis.
5. Insert teflon tubing (21) through grommet (20) in bottom of enclosure.
Seat the tubing in mating adapter fitting at the bottom of reference air
pressure regulator (22).
6. Refer to Figure 4-2. Connect all signal and power wiring to the chassis
terminals and connect the power cable ground lead to the ground lug.
7. Connect all pneumatic lines at the SPS 4001B manifold. Turn on the
calibration gas and reference air supplies to the SPS 4001B.
8. Close the enclosure cover and secure the cover screws.
1. Screw 8. Screw 15. Low Cal. Gas Solenoid 22. Reference Air Pressure
2. Fuse 9. Adapter Fitting 16. Pressure Switch Regulator
3. Nylon Washer 10. Impolene Tubing 17. Manifold Gasket 23. Elbow Adapter
4. Standoff 11. Tubing 18. Screw 24. Chassis
5. Circuit Board 12. Straight Fitting 19. Elbow Fitting 25. Reference Air Flow Meter
6. Hex Nut 13. Manifold 20. Grommet 26. Cal. Gas Flow Meter
7. External Lock Washer 14. High Cal. Gas Solenoid 21. Teflon Tubing 27.
Ground Wire