Filter
Top Products
Reference Manual
00809-0100-4388, Rev BA
January 2008
5-3
Rosemount 1153 Series D
1. Disengage the header assembly board (4) as described in the
electrical housing disassembly procedure on 5-4. You need not
remove the sensing module from the electrical housing for checkout.
2. Jump connections 1 and 2 on the header assembly board (see Figure
5-1 on page 5-2).
3. Using a low-voltage ohmmeter, check the resistance between the
jumper wire and sensing module housing. This resistance should be
greater than 10 MΩ. Remove the jumper wire.
4. Jump connections 3 and 4 on the header assembly board and repeat
step 3 (see Figure 5-1 on page 5-2).
NOTE
The above procedure does not completely test the sensing module. If circuit
board replacement does not correct the abnormal condition and no other
problems are obvious, replace the sensing module.
DISASSEMBLY
PROCEDURE
NOTE
Numbers in parentheses refer to item numbers in Figure 5-2 on page 5-7.
NOTE
The Rosemount 1153 Series D Pressure Transmitter contains electronic
circuit boards which may be static sensitive.
Process Flange Removal
NOTE
Read the Process Flange Reassembly procedure on page 5-6 before
attempting disassembly. Special testing and traceability are required.
1. Remove the transmitter from service before disassembling flanges.
2. Detach process flanges (13, 15) by removing the four large bolts (14).
Take care not to scratch or puncture the isolating diaphragms.
Identify high and low (“H” and “L”) flanges for reassembly.
NOTE
Carefully remove the O-rings (11) from the cell if they do not come off when
the flange is removed. Do not pry the O-ring from its seat as you may damage
the isolating diaphragm.
3. Clean isolating diaphragms with a soft rag and a mild cleaning
solution. Do not use any chlorine or acid solutions to clean the
diaphragms. Rinse diaphragms with distilled water.
Process O-rings may retain some process fluid after disassembly of
process flanges. If this fluid is determined to be contaminated, take
appropriate safety measures.