Rosemount Oxymitter 4000, Инструкционный бюллетень

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IB-106-340
6-10
c. Terminal Block Replacement (Figure 6-4).
1. Loosen the mounting screws on the terminal
block and carefully lift the block out of the
housing.
2. Carefully align the new terminal block on the
pins so that it sits flat in the housing. The
round end of the terminal block should be on
the opposite side of the housing conduit ports
and should not be able to rotate.
3. Tighten the three mounting screws and ensure
the terminal block is secure in the housing.
d. Fuse Replacement (Figure 6-5).
1. Remove the right housing cover uncovering
the electronic assembly.
2. Depress and remove the J1 (cell and T/C)
connector from the J1 socket. Loosen the
three captive mounting screws on the micro-
processor board (top board).
3. The J8 connector (heater leads) can be
accessed by moving the J1 connector leads
out of the slot on the microprocessor board
and sliding the electronic assembly partially
out of the housing (Figure 6-6).
4. Squeeze the J8 connector on the sides and
carefully remove. The electronic assembly
can now be completely removed from the
housing.
3D
39619G
REV
1
+
250VAC
TIME LAG
5A
+
+
+
+
+
+
+
+
1
FUSE
POWER
SUPPLY
BOARD
22220058
Figure 6-7. Fuse Location
5. Completely remove the three mounting
screws on the microprocessor board.
6. Turn the electronic assembly over so that you
are looking at the bottom of the power supply
printed circuit board. Gently depress the two
white posts one at a time. Carefully separate
the power supply board from the micropro-
cessor board.
7. Remove the fuse and replace it with a new
one (Figure 6-7).