Oxymitter 4000

Instruction Manual

IB-106-340 Rev. 3.0 December 2003

b.Board Replacement

Perform the following procedure to replace power supply board (18, Figure 9-13)or in- terface board (19).

Disconnect and lock out power before working on any electrical components.

1.Turn off power to the system.

2.Remove screw (7) securing manifold cover lock (6) and remove the lock.

3.Remove manifold cover (14).

4.Remove two screws (11) attaching spacers (9) to manifold (5).

See Figure 9-14.If removing the interface board, remove the CAL INITIATE leads from connector J3, CAL FAIL and IN CAL leads from connector J4, and logic I/O handshake connection from connector J5.

8.Remove stop nuts (22, Figure 9-13),washers (21), and screws (10) secur- ing power supply board (18) and inter- face board (19) to spacers (9).

9.Carefully separate boards (18 and 19).

10.Connect replacement board to board (18 or 19).

11.Install screws (10), washers (21), and stop nuts (22) to secure power supply board (18) and interface board (19) to spacers (9).

5.Being careful not to disconnect the board wiring, carefully lift power supply board (18) and interface board (19) from manifold (5) and set aside. Do not lose O-rings (8) from the bottom of spacers (9).

6.Tag all leads on the board to be re- placed to simplify installation.

7.See Figure 9-14.If removing the power supply board, remove line voltage input leads from connector J7. Unplug cali- bration gas 1 solenoid leads from con- nector J5, calibration gas 2 solenoid leads from connector J4, and pressure switch leads from connector J2.

12.Install all applicable leads in the appro- priate locations on the power supply board or interface board as shown in Figure 9-14.

13.Install power supply board (18, Figure 9-13)and interface board (19) into manifold (5). Align spacers (9) with the mounting holes on the manifold and secure with screws (11). Ensure O-rings (8) are installed between the spacers and the manifold surface.

14.Install manifold cover (14) and secure with manifold cover lock (6) and screw

(7).

Rosemount Analytical Inc. A Division of Emerson Process Management

Maintenance and Service 9-19