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Reference Manual
00809-0100-4001, Rev JA
Section 2: Installation
November 2012
Installation
Dry leg condition
Low-side transmitter piping will remain empty if gas above the liquid does not condense. This is
a dry leg condition. Range determination calculations are the same as those described for
bottom-mounted transmitters in open vessels, as shown in Figure 2-25.
Wet leg condition
Condensation of the gas above the liquid slowly causes the low side of the transmitter piping to
fill with liquid. The pipe is purposely filled with a convenient reference fluid to eliminate this
potential error. This is a wet leg condition.
The reference fluid will exert a head pressure on the low side of the transmitter. Zero elevation of
the range must then be made. See Figure 2-26.
Bubbler system in open vessel
A bubbler system that has a top-mounted pressure transmitter can be used in open vessels. This
system consists of an air supply, pressure regulator, constant flow meter, pressure transmitter,
and a tube that extends down into the vessel.
Bubble air through the tube at a constant flow rate. The pressure required to maintain flow
equals the liquid’s specific gravity multiplied by the vertical height of the liquid above the tube
opening. Figure 2-27 shows a bubbler liquid level measurement example.
ZERO
SUPRESSION
mA dc
20
540
900
inH
2
O
4
Figure 2-25. Liquid level measurement example.
Let X equal the vertical distance between the minimum and maximum
measurable levels (500 in.).
Let Y equal the vertical distance between the transmitter datum line and the
minimum measurable level (100 in.).
Let SG equal the specific gravity of the fluid (0.9).
Let h equal the maximum head pressure to be measured in inches of water.
Let e equal head pressure produced by Y expressed in inches of water.
Let Range equal e to e + h.
Then h = (X)(SG)
= 500 x 0.9
= 450 inH
2
O
e = (Y)(SG)
= 100 x 0.9
= 90 inH
2
O
Range = 90 to 540 inH
2
O
T
Y
X
- Protocol 1
- Rosemount 3051 Pressure 3
- Transmitter 3
- Title Page 4
- Contents 5
- 3Section 3: Configuration 6
- 5Section 5: Troubleshooting 7
- Reference Manual 10
- Table of Contents 10
- Section 1 Introduction 11
- 1.3 Models covered 12
- 1.4 Transmitter overview 13
- Section 2 Installation 15
- 2.3 General considerations 16
- 2.4 Mechanical considerations 17
- 2.8 Installation procedures 20
- Flange bolts 21
- Bolt installation 23
- 2.8.2 Impulse piping 24
- Mounting requirements 25
- 2.8.3 Process connections 26
- O-rings: 27
- 2.8.5 Housing rotation 28
- 2.8.6 LCD display 29
- Security (write protect) 30
- TRANSMITTER SECURITY 31
- JUMPER POSITIONS 31
- 2.9 Electrical considerations 32
- 2.9.2 Wiring 33
- Section 2: Installation 34
- Installation 34
- Power supply for 4-20 mA HART 35
- 2.9.4 Grounding 37
- Signal wiring 38
- Transmitter case 38
- External Ground 39
- Assembly 39
- Figure 2-24. Manifolds 40
- 2.11.4 Manifold operation 41
- 2.12 Liquid level measurement 44
- 2.12.1 Open vessels 45
- 2.12.2 Closed vessels 45
- Dry leg condition 46
- Wet leg condition 46
- Bubbler system in open vessel 46
- Figure 2-26. Wet leg example 47
- Section 3 Configuration 49
- 3.3 Commissioning 50
- 3.3.2 Wiring diagrams 51
- 3.5 Field communicator 52
- Section 3: Configuration 54
- Configuration 54
- 3.8 Check output 60
- 3.8.1 Process variables 61
- 3.8.2 Sensor temperature 61
- 3.9 Basic setup 62
- 3.9.3 Rerange 63
- Field communicator 65
- AMS device manager 65
- 3.9.4 Damping 67
- 3.10 LCD display 68
- 3.11 Detailed setup 71
- 3.12 Diagnostics and service 72
- 3.13 Advanced functions 74
- 3.13.2 Burst mode 77
- 3.14 Multidrop communication 78
- 4.1 Overview 81
- 4.2 Safety messages 81
- 4.3 Calibration overview 82
- TPE = = 0.117% of span 85
- TPE = = 0.105% of span 86
- 4.4 Analog output trim 87
- AMS Device Manager 89
- 4.5 Sensor trim 91
- 4.5.2 Zero trim 92
- 4.5.3 Sensor trim 93
- Zero effect 95
- Span effect 95
- Operation and maintenance 98
- Section 5 Troubleshooting 99
- 5.2.1 Warnings ( ) 100
- Section 5: Troubleshooting 101
- Troubleshooting 101
- Symptom Corrective actions 101
- 5.3 Diagnostic messages 102
- Operation 103
- Span Fail 104
- Local Dsbld 104
- Write Protect 104
- Message Description 105
- 5.4 Disassembly procedures 107
- 5.4.1 Remove from service 108
- 5.4.2 Remove terminal block 109
- 5.5 Reassembly procedures 110
- 00809-0100-4001, Rev JA 111
- November 2012 111
- A.1.2 Reference accuracy 114
- A.1.3 Total performance 114
- A.1.4 Long term stability 115
- A.1.5 Dynamic performance 115
- A.1.9 Vibration effect 116
- A.1.10 Power supply effect 117
- A.2 Functional specifications 118
- A.2.3 Service 120
- A.2.4 4–20 mA (Output Code A) 120
- fieldbus Parameters 121
- Minimum Load Impedance 123
- Indication 123
- Overpressure Limits 123
- A.2.13 Static Pressure Limit 124
- A.2.14 Burst Pressure Limits 124
- A.2.15 Failure Mode Alarm 124
- A.2.16 Temperature Limits 125
- A.3 Physical specifications 126
- A.3.3 Process-Wetted Parts 127
- A.3.5 Non-Wetted Parts 128
- A.3.6 Shipping Weights 129
- A.4 Dimensional Drawings 130
- 3051C Coplanar Flange 131
- Appendix A: Reference Data 132
- 3051T Dimensional Drawings 135
- Pipe Mounting Panel Mounting 136
- 3051L Dimensional Drawings 137
- A.5 Ordering Information 141
- (3051C with Option Code S1)) 146
- OUNDATION fieldbus Protocol ★ 149
- Axxxx Specials •• •• 165
- A.6 Options 166
- Shipping weights 169
- A.7 Spare parts 174
- OUNDATION or PROFIBUS PA) 177
- Mounting brackets Part number 182
- B.1 Overview 185
- B.2 Safety messages 185
- B.2.1 Warnings 186
- FM Approvals 187
- CSA international 187
- European certifications 188
- Japanese certifications 189
- IECEx certifications 189
- Inmetro certifications 190
- China certifications 191
- B.6 Approval drawings 194
- Product certifications 195
- Index-207 217
- Index-208 218
- Index-209 219
- Index-210 220
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