Emerson Rosemount 3152 - Page 8

Rosemount 3150 Series
Reference Manual
00809-0100-4835 Rev BE
February 2018
viii
Contents
SECTION 4
Overview...................................................................................................
45
Operation
Transmitter Theory of Operation...............................................................
46
The Sensor Cell........................................................................................
47
Demodulator.............................................................................................
48
Oscillator...................................................................................................
48
Voltage Regulator.....................................................................................
48
Current Control.........................................................................................
49
Current Limit.............................................................................................
49
Reverse Polarity Protection......................................................................
49
SECTION 5
Overview...................................................................................................
51
Maintenance and
Safety Messages......................................................................................
51
Troubleshooting
General Considerations............................................................................
52
Test Terminal............................................................................................
54
Electronics Assembly Checkout...............................................................
54
Sensor Module Checkout.........................................................................
55
Disassembly Procedure............................................................................
56
Process Flange Removal.............................................................
57
Electronics Housing Disassembly................................................
57
Reassembly Procedure............................................................................
59
Electronics Housing Reassembly................................................
59
Process Flange Reassembly.......................................................
63
Post Assembly Tests................................................................................
64
SECTION 6
Overview...................................................................................................
69
Transmitter Spare
Safety Messages......................................................................................
69
Parts
General Considerations............................................................................
71
Spare Parts Storage and Shelf Life..........................................................
71
Impact on Transmitter Qualified Life.........................................................
72
Transmitter Spare Parts List.....................................................................
73