Emerson Process Management OXYMITTER 4000 instruction manual Fuse Location

Instruction Manual

IB-106-340C Rev. 4.1 July 2004

Hazardous Area Oxymitter 4000

Opening the electronic housing will cause the loss of ALL hazardous per- mits. Opening the electronics housing in a hazardous area may cause an explosion resulting in loss of property, severe personal injury, or death. It may be required to get a hot work permit from your company safety officer be- fore opening the electronic housing.

e.Fuse Replacement See Figure 9-7.

1.Remove screw (18, Figure 9-3or Figure 9-4), cover lock (19), and cap- tive washer (20) securing cover (1). Remove the cover.

2.See Figure 9-5.Depress and remove the J1 (cell and T/C) connector from the J1 socket.

3.Loosen the three captive screws (10, Figure 9-3or Figure 9-4). Slide electronic assembly (2) partially out of housing (11).

4.See Figure 9-6.Squeeze the sides of the J8 connector, and carefully remove the J8 connector (heater leads) from the power supply board.

5.Remove the electronic assembly (2, Figure 9-3or Figure 9-4)from the housing (11).

6.Turn the electronic assembly over so that you are looking at the bottom of the power supply board (Figure 9-7).

7.Gently depress the two white posts one at a time. Carefully separate the power supply board from the analog board.

8.Remove the fuse and replace it with a new one.

POWER

SUPPLY

BOARD

FUSE

37270021

Figure 9-7. Fuse Location

9.Align the white posts with the post holes on the power supply board and the pin connector on the power supply board with the connector port on the back of the analog board. Gently push the boards together until the white posts snap in place. Ensure the as- sembly is secure by gently trying to separate the boards.

10.Reconnect the J8 connector to the power supply board. Make sure the connector is secure.

11.Holding the J1 connector leads, slide the electronic assembly the rest of the way into the housing. Seat the electronic assembly on the mating connector pins.

12.Gently try to rotate the electronic assembly to check for full seating. If the electronic assembly rotates, remove the assembly and repeat step 11.

13.Reconnect the J1 connector to the microprocessor board (Figure 9-5). Ensure the connector is secure.

14.Tighten the three captive screws (10, Figure 9-3or Figure 9-4)in the top of the microprocessor board (5).

9-12 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management