Emerson Process Management 00809-0700-4530 User Manual

Reference Manual

00809-0700-4530, Rev AA

September 2013

Rosemount Process Radar in Power Applications

Best Practices User Guide

Reference Manual

00809-0700-4530, Rev AA

Rosemount Process Radar in Power
Applications

Best Practices User Guide

September 2013

The products described in this document are NOT rated for use in nuclear-qualified
applications.

Using non-nuclear qualified products in applications that require nuclear-qualified
hardware or products may cause failure of the device.

For information on Rosemount nuclear-qualified products, contact your local Emerson
Process Management Sales Representative.

The Guided Wave Radar (GWR) products (Rosemount 5300 and 3300 Series) are designed
to meet FCC and R&TTE requirements for a non-intentional radiator. It does not require any
licensing whatsoever and has no tank restrictions associated with telecommunications
issues.

For Non-intentional radiators (Rosemount 3300 and 5300 Series ), the Rosemount products
are compliant with EMC Directive 2004/108/EC.

The Non-contacting radar devices comply with part 15 of the FCC rules. There are no
restrictions for use of the Rosemount 5401 low frequency device. The high frequency
Rosemount 5402 may be used in any type of vessel. The mid-frequency Rosemount 5600
Series must be used in metallic vessels. If the device is to be used in an open air application,
then a site license may be required.

For radiating products, the Rosemount products are compliant with R&TTE Directive
1999/5/EC.

FCC license numbers for the Rosemount 5400 and 5600 Series:

 Rosemount 5401: K8C5401
 Rosemount 5402: K8C5402 (must be mounted in a tank)
 Rosemount 5600 Series, for applications in sealed metal tanks: K8CPRO (FCC rule part

15C), K8CPROX (FCC rule part 90)
The license numbers are included on the device labels.
In Canada, the following license numbers are valid for closed metal tanks:

 Rosemount 5401: 2827A-5401
 Rosemount 5402: 2827A-5402
 Rosemount 5600 Series: 2827A-5600PRO

No certificate is applicable for Non-intentional radiators.
The EC Declaration of Conformity for all applicable European directives for the Rosemount

products can be found on the Rosemount website at www.rosemount.com. A hard copy
may be obtained by contacting our local sales representative.

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Contents

1Section 1: Power applications

Table of Contents

September 2013

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Boiler systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3 Turbines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.4 Water supply and pre-treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.5 Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.6 Fuel supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.7 Fuel combustion / clean-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.8 Effluent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.9 Hydro power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.10 Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2Section 2: Installation considerations

2.1 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.3 Chamber installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.3.1 High pressure steam applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3.2 Chamber fabrication and probe selection . . . . . . . . . . . . . . . . . . . . . . 14

2.3.3 Chamber mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3.4 Existing chambers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3.5 Pressure and temperature specifications . . . . . . . . . . . . . . . . . . . . . . . 19

2.3.6 Remote housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.3.7 Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.4 Tank installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.4.1 Recommended mounting position . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.4.2 Nozzle considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2.4.3 Probe and antenna selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2.5 Solids measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

2.5.1 Rosemount 5303 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

2.5.2 Rosemount 5600 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Tab le of Content s

3Section 3: Commissioning

3.1 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3.3 Functions of procedures to include during commissioning process . . . . . . . 36

3.3.1 Trim Near Zone (GWR transmitters) . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

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3.3.2 Changing the Upper Null Zone (UNZ) . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.3.3 Measure and learn function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.3.4 Vapor compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.3.5 Remote housing (GWR transmitters) . . . . . . . . . . . . . . . . . . . . . . . . . . 43

3.3.6 Setting range values for chambers - options . . . . . . . . . . . . . . . . . . . . 43

3.3.7 Signal Quality Metrics (Rosemount 5300 and 5400 Series) . . . . . . . 47

3.3.8 Configuration for process conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 47

3.3.9 Probe End Projection (Rosemount 5300 Series solids measurement) 48

3.3.10 Store backup and verification files . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

3.3.11 Write protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

3.3.12 On the bench test (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4Section 4: Measurement validation

4.1 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4.3 Measurement validation at operating conditions . . . . . . . . . . . . . . . . . . . . . . . 52

4.4 Operation and maintenance - proof testing for SIS . . . . . . . . . . . . . . . . . . . . . . 58

4.4.1 Proof test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

4.4.2 Visual inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

4.4.3 Special tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

4.4.4 Product repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

5Section 5: Troubleshooting procedures

5.1 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

5.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

5.3 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5.4 Echo curve analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

5.4.1 Echo curve constituents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

5.4.2 Rosemount GWR transmitter threshold settings . . . . . . . . . . . . . . . . 69

5.4.3 Rosemount non-contacting radar transmitter threshold settings . 69

5.4.4 Common problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

5.5 Sources of measurement error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

5.5.1 Installation and location errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

5.5.2 Geometries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

5.5.3 Probe End Pulse offset (only relevant for PEP) . . . . . . . . . . . . . . . . . . . 76

5.5.4 Analog output settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

5.5.5 Incorrect static vapor compensation . . . . . . . . . . . . . . . . . . . . . . . . . . 78

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AAppendix A: Checklists

Table of Contents

September 2013

5.5.6 Reconciling radar with other level measurements . . . . . . . . . . . . . . . 79

A.1 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

A.2 Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

A.2.1 Commissioning procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

A.2.2 Measurement validation procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

A.2.3 Troubleshooting procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Tab le of Content s

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Section 1 Power applications

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Boiler systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Turbines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Water supply and pre-treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Fuel supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Fuel combustion / clean-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Effluent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Hydro power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1 Introduction

Section 1: Power Applications

September 2013

This document describes some of the best practices learned during the installation of thousands
of Rosemount process radar level transmitters in power applications.

In a power plant, the radar applications can be divided into the following subcategories:

 Boiler systems

 Tur b in es

 Water supply and pre-treatment

 Cooling system

 Fuel supply

 Fuel combustion / clean-up

 Effluent

 Hydro power

 Miscellaneous

Each application differs in how the transmitters are to be installed to achieve optimized result. It
is important to follow the best practice for the specific application. If unsure about the
installation of your Rosemount radar transmitter, or you cannot find the suitable best practice
for your application, contact your local Emerson Process Management representative for
support.

For more information on how to choose the correct technology and transmitter for an
application, see the Engineer’s Guide to Level Measurement for Power and Steam Generation
document, available to order on www.rosemount.com.

Power applications

1

Section 1: Power Applications

September 2013

1.2 Boiler systems

For boiler systems, radar transmitters are commonly used for the following applications:

 Boiler drum level control

 High pressure feedwater heater

 Low pressure feedwater heater

 Steam separators (once through systems)

 Boiler blowdown tanks

 Flash / surge tanks

 Condenser hotwell

 Condensate storage

 Deaerator

1.3 Turbines

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For turbines, radar transmitters are commonly used for the following applications:

 Gland steam condenser

 Lubrication oil tanks

 Hydraulic oil tanks

1.4 Water supply and pre-treatment

For water supply and pre-treatment activities, radar transmitters are commonly used for the
following applications:

 Demineralization system / chemical storage

 Intake water screens

 Rock salt

 Brine tank

 Boric acid, heavy water and makeup water

1.5 Cooling system

For cooling systems, radar transmitters are commonly used for the following applications:

 Cooling tower basin

 Refrigerants

2

Power applications

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1.6 Fuel supply

For fuel supply, radar transmitters are commonly used for the following applications:

 Fuel oil storage

 Natural gas separators

 Coal crusher hopper

 Coal mill supply silo (bunker)

 Coal stack pile and other fuel sources (bark, garbage)

1.7 Fuel combustion / clean-up

For fuel combustion / clean-up, radar transmitters are commonly used for the following
applications:

 Ammonia, anhydrous

 Ammonia, aqueous

 Ash slurry, lime slurry or liquid gypsum

Section 1: Power Applications

September 2013

 Sulfur solution tanks

 Scrubbers

 Ash hopper - bottom ash or fly ash

 Lime silo

 Powder Activated Carbon (PAC), combustion salt, bone meal, dried sludge

1.8 Effluent

For effluent, radar transmitters are commonly used for the following applications:

 Effluent flow

 Open atmosphere sumps

 Clarifiers

1.9 Hydro power

For hydro power, radar transmitters are commonly used for the following applications:

 Head and tail race

 Leaky weir at bottom of dam

Power applications

 Water catchment (water supply level and silt detection)

3

Section 1: Power Applications

September 2013

1.10 Miscellaneous

For miscellaneous, radar transmitters are commonly used for the following applications:

 Sumps (drain pit for waste oil, condensate)

 Water wash tanks

 Fire water tanks

 Lake or pond level

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Power applications

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Section 2: Installation Considerations

Section 2 Installation considerations

Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Chamber installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Tank installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Solids measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

2.1 Safety messages

Procedures and instructions in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that raises potential safety issues is

indicated by a warning symbol ( ). Please refer to the following safety messages before
performing an operation preceded by this symbol.

September 2013

Explosions could result in death or serious injury.

Verify that the operating environment of the transmitter is consistent with the appropriate
hazardous locations certifications.

Before connecting a HART
the instruments in the loop are installed in accordance with intrinsically safe or
non-incendive field wiring practices.

Do not remove the gauge cover in explosive atmospheres when the circuit is alive.

Failure to follow safe installation and servicing guidelines could result in death or
serious injury.

Make sure only qualified personnel perform the installation.
Use the equipment only as specified in this manual. Failure to do so may impair the

protection provided by the equipment.
Do not perform any services other than those contained in this manual unless you are

qualified.

Process leaks could result in death or serious injury.

Make sure that the transmitter is handled carefully. If the process seal is damaged, gas
might escape from the tank if the transmitter head is removed from the probe.

High voltage that may be present on leads could cause electrical shock:

Probes covered with plastic and/or with plastic discs may generate an ignition-capable level
of electrostatic charge under certain extreme conditions. Therefore, when the probe is
used in a potentially explosive atmosphere, appropriate measures must be taken to prevent
electrostatic discharge.

®

-based communicator in an explosive atmosphere, make sure

Installation considerations

5

Section 2: Installation Considerations

September 2013

2.2 Introduction

In addition to selecting the appropriate radar level transmitter, mechanical installation is one of
the most critical steps of the commissioning procedure. When done correctly, the subsequent
transmitter configuration will be considerably simplified. Because of the wide usage and
application in the power industry, this section provides a framework for chamber installations,
tank installations, and solids measurements.

2.3 Chamber installations

Chambers - also known as bridles, side-pipes, bypass pipes, and cages - are typically used
because:

 External mounting with valves allows for servicing of the level device, even in

pressurized tanks that are in continuous operation for many years

 They allow for radar measurement in tanks or regions with side-connections only, such

as boiler drum, condenser and feedwater tanks

 They provide a calmer surface in case of turbulence, boiling, or other conditions that

upset the product

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NOTE:

For chamber installations, use metallic pipes exclusively.

However, chambers also have some disadvantages:

 Inlet pipes may clog and generate a discrepancy between the level inside the chamber

and the actual level in the tank

 The effective measuring range is limited to the region between the upper and lower

inlet pipes

 Different process conditions (temperature/pressure) in the chamber than in the tank

may generate discrepancy between the level inside the chamber and the actual level in
the tank

A pipe can increase the reliability and robustness of the level measurement, especially for
non-contacting radar. It should be noted that the coaxial probe of a Guided Wave Radar (GWR)
is essentially a probe within a small stilling well. It should be considered as an alternative to
stilling wells for clean fluid applications.

Pipes completely isolate the transmitter from disturbances, such as other pipes, agitation, fluid
flow, foam, and other objects. The pipes can be located anywhere in the vessel that allows
access. For GWR, the microwave signals are guided by the probe, making it resistant to
disturbing objects.

Bypass chambers may be located on a small portion of a tank or column and allow access to the
measurement instrument.

Bypass chambers often include valves to allow instrumentation calibration verification or
removal for service.

Bypass chambers and stilling wells are not without limitations. Generally, pipes should be used
with cleaner fluids that are less likely to leave deposits and that are not viscous or adhesive.

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Installation considerations

Reference Manual

Error

Error

Error

Inlet-pipe
clogged

Error

300 °F (150 °C)
SG=0.80

150 °F (65 °C)
SG=0.85

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Apart from the additional cost of installation, there are some sizing and selection criteria for the
radar gauges that must be considered. This document outlines those considerations.

GWR is the preferred technology for shorter installations where rigid probes may be used. This
makes it a suitable replacement for caged displacers, which are often less than 10 ft. (3 m). The
probes are available in a variety of materials to handle corrosive fluids.

For further information on how to replace displacers with GWR in existing chambers, see the
Replacing Displacers with Guided Wave Radar Technical Note (Document No.
00840-2200-4811).

For taller applications or those with limited head space for installing rigid probes,
non-contacting radar may be advantageous. Non-contacting radar is also the preferred
technology for applications with heavy deposition or very sticky and viscous fluids.

Figure 2-1. Possible error sources in chamber installations

Section 2: Installation Considerations

September 2013

For application guidelines, see Section 1: Power applications.

2.3.1 High pressure steam applications

Phase changes

It is especially common during startup to experience varying temperature and pressure. Both
the liquid and steam phases of the system will have density changes as the system reaches the
operating temperature and pressure which can cause up to a 30% error over temperature up to
600 °F (315 °C), as seen in Tab l e 2 -1 .

Installation considerations

7

Section 2: Installation Considerations

September 2013

Any density-based level measurement device will need compensation to discern the actual level
from the density-associated errors. Algorithms have been developed to make this
compensation as seamless as possible in the control systems, but require input of operating
pressure as well as level. Compensation can be slow which results in erroneous reading.

There will also be dielectric property changes both in the liquid and steam phases. Steam under
high pressure will slow down the propagation speed of a radar signal which can cause over a 20%
error over temperature if not compensated.

Even though the dielectric of water decreases with temperature increase, the level can be
measured as long as the water dielectric remains sufficiently high, which results in a reflection
back from the surface. However, as the temperature increases, the dielectric difference between
the liquid and the steam becomes smaller, and at a certain point, it will be too small for reliable
measurement with radar transmitters.

Between 2610 psi (180 bar) and 2900 psi (200 bar), the dielectric difference between steam and
water becomes too small to offer reliable level measurement. In this case, GWR is no longer
suitable.

Below 2610 psi (180 bar), GWR is a suitable means of measurement if compensation for the
dielectric of the steam dielectric is completed.

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Table 2-1. The error in distance with changing temperature and pressure, without vapor

compensation

(1)

.

Tem p. °F /° C Pressure psia/bar DK of liquid DK of vapor Error in distance %

100/38 1/0.1 73.95 1.001 0.0

200/93 14/1 57.26 1.005 0.2
300/149 72/5 44.26 1.022 1.1
400/204 247/17 34.00 1.069 3.4
500/260 681/47 25.58 1.180 8.6
600/316 1543/106 18.04 1.461 20.9
618/325 1740/120 16.7 1.55 24.5
649/343 2176/150 14.34 1.8 34.2
676/358 2611/180 11.86 2.19 48
691/366 2900/200 9.92 2.67 63.4
699/370 3046/210 8.9 3.12 76.6
702/372 3120/215 Above critical point; distinct liquid and gas phases do not exist.

Extreme high pressures and temperatures

In these applications, temperatures above 300 °F (150 °C) and pressures above 580 psi (40 bar)
are common. Therefore, having robustly designed equipment which prevents leakage and
performs reliably is vital for safety.

Magnetite coating

While these applications are generally considered to be composed of clean water and steam, it
is normal to have a layer of magnetite on metallic surfaces. In some cases, the deposits can be
heavy enough to cause some mechanical linkages to freeze and stick resulting in a need for
maintenance. With no moving parts in the GWR probe assembly, magnetite poses no issues for
sticking.

(1) Maximum limit for GWR is 180 bar. For applications over this pressure limit other solutions are used.

8

Installation considerations

Reference Manual

00809-0700-4530, Rev AA

Heavy vibrations

Heavy vibrations from pumps can cause a noisy signal from mechanical-based techniques.

Advantages of GWR over other techniques

Since GWR measurement devices are completely independent of density, these associated
errors are not present, thus eliminating the need for this compensation.

GWR has no moving parts that can freeze or stick from magnetite coating or cause noisy signal
due to vibration. Therefore, GWR offers additional advantages of lower maintenance and
greater stability.

Vapor compensation functionality

In the Rosemount 5300 Series Superior Performance GWR, there are two functions to
compensate for the vapor dielectric:

 Static Vapor Compensation (SVC)

 Dynamic Vapor Compensation (DVC)

Section 2: Installation Considerations

September 2013

With either option, the compensation occurs in the transmitter electronics and a corrected level
measurement is provided to the control system. No additional compensation is required.

As it can be seen in Ta b le 2 - 1, at 247 psia (17 bar), there is an error in distance of 3.4%. At
1543 psia (106 bar), there is an error of 20.9% when there is no compensation for the vapor
dielectric.

The error in distance increases with the pressure, and at some point this deviation is not
negligible and must be taken into account in order to get high accuracy.

Static vapor compensation (SVC)

For the static compensation function, the dielectric of the vapor at expected operating pressure
and temperature is manually entered as part of the configuration of the transmitter. This allows
the unit to compensate for the dielectric at operating conditions.

The static compensation works well under stable conditions and in these applications, the
standard High Temperature/High Pressure (HTHP) probe is used.

Dynamic vapor compensation (DVC)

DVC becomes more important for the higher pressure applications which may have more
variations in the operating conditions or where the users want to be able to verify the unit under
near ambient conditions, such as during startup and shutdown, without having to modify the
vapor dielectric settings.

Vapor dielectric does not affect the measurement accuracy until the pressure is higher than
145 psia (10 bar). DVC should be considered when the pressure is above 247 psia (17 bar) when
the error is more than 2%, see Table 2-3 on page 13. In these cases, DVC can bring the error back
to 2%, or in some conditions even down to 1%.

Application and installation conditions, such as lower temperature in the bypass chamber, can
cause changes within the measured media. Therefore, the error readings can vary depending on
the application conditions and may cause an increase of the measuring error by a factor of 2 to

3.

Installation considerations

9

Section 2: Installation Considerations

Signal curve before DVC

Signal curve after DVC

September 2013

DVC requires a special probe with a built-in reflector for measurement of the dielectric of the
steam.

DVC works by using a target at a fixed distance. With this target, the vapor dielectric is
measured continuously.

The transmitter knows where the reflector pulse should have been if there were no vapor
present. However, since there is vapor in the tank, the reflector pulse appears beyond the actual
reflector point.

The distance between the actual reflector point and the apparent reflector point is used to
calculate the vapor dielectric. The calculated dielectric is then dynamically used to compensate
for vapor dielectric changes and eliminates the need to do any compensation in the control
system.

When the distance between the mounting flange and the surface is less than 22 in. (560 mm)
for the short reflector, and 28 in. (710 mm) for the long reflector, the function switches from
dynamic to static vapor compensation using the last known vapor dielectric constant.

Reference Manual

00809-0700-4530, Rev AA

Figure 2-2. Radar signal curve before and after vapor compensation

(1)

(1) The figure illustrates the radar signal curve before and after vapor compensation. Without compensation, the surface pulse

appears to be beyond the actual level. After compensation, the surface appears at the correct surface level point.

10

Installation considerations

Reference Manual

Brazed hermetic/gas-tight ceramic seal is
isolated from the process and is unaffected
by temperature shocks, vibrations and
outside forces on the probe

Flexible probe load and locking system
with active springs and PTFE frame,
compensates for stress and protects the
ceramics

Drip-off sleeve for condensation and
dirt protection

Spacer, one used near the top of
the probe and one further down
if the probe is longer than
79 in. (2 m)

Reference reflector

The solution for 3
and 4 inch chambers
has an outer pipe
around the rod

Ceramic insulators
and graphite
gaskets provide a
robust thermal
and mechanical
barrier and offer
chemical
resistance

Reference reflector

Illustration of the
solution for 2 inch
chambers

00809-0700-4530, Rev AA

Rosemount design advantages

Rosemount 5300 GWR extreme temperature and pressure probes are designed to prevent
leakage and perform reliably when exposed to extreme process conditions for extended periods
of time. Materials are selected to avoid stress fractures commonly induced by changes in
temperature and pressure conditions.

The robustness of the probes and materials means high safety for these extreme temperature
and pressure applications.

Figure 2-3. Probe with reference reflector marked “VC2” for recognition

Section 2: Installation Considerations

September 2013

Figure 2-4. HTHP seal

The GWR probe design provides multiple layers of protection

Installation considerations

11

Section 2: Installation Considerations

Not OK

OK

NOTE:

If a spool piece is used with the single lead probe
designed for 2 in. chambers, it is important that
the reference reflector and the spool piece do
not have the same length.

September 2013

DVC installation best practices

The GWR should be mounted in a bypass chamber with flanges appropriately sized for the
pressure and temperature of the application. A 3 or 4 inch (75 or 100 mm) diameter chamber is
recommended as best practice, but the GWR can also be mounted in a 2 inch (50 mm) chamber.

Materials used for the chamber should meet local boiler code requirements and the chamber
should be isolated directly from the boiler or high pressure heater by valves.

A specially designed HTHP probe with reference reflector for vapor compensation should be
used. For 2 in. (50 mm) chambers, this probe is a single rigid probe, and for 3 and 4 in. (50 and
100 mm) chambers this is a single rigid probe with an outer pipe.

Probes up to 13.1 ft. (4 m) length are supported for DVC.

DVC requires a minimum distance from the flange to the surface level to measure the change in
the vapor dielectric constant. If the level rises within this area, the unit switches over to static
compensation, using the last known vapor dielectric constant.

This minimum distance (indicated by X in Figure 2-9 on page 18) is 22 in. (560 mm) for the short
reflector, and 28 in. (710 mm) for the long reflector, to dynamically compensate up to 100%.

Reference Manual

00809-0700-4530, Rev AA

The minimum measuring range for this functionality is 12 in. (300 mm).

Table 2-2. Minimum distance X

Probe length Reflector Minimum distance X

35 - 158 in. (900 - 4000 mm) 14 in. (350 mm) 22 in. (560 mm)

43 - 158 in. (1100 - 4000 mm) 20 in. (500 mm) 28 in. (710 mm)

If a 5300 Series GWR transmitter is ordered from Rosemount together with a 9901 Chamber,
these space requirements are met by using the option code G1 or G2 for the chamber. G1 is
used with the short reflector, and G2 is used with the long reflector.

If an existing chamber is used which does not meet these space requirements, a spool piece can
be added. For an installation with a spool piece with the 2 in. DVC solution, it is important to
make sure that the reference reflector and the spool piece do not have the same length.

The spool piece needs to be at least 2 in. (50 mm) longer or shorter. For a spool piece with the 3
and 4 in. DVC solution, this is not a requirement.

Figure 2-5. Installation with a spool piece

12

Installation considerations

Reference Manual

00809-0700-4530, Rev AA

For high pressure steam applications above 400 psi (28 bar), it is also important to limit the
overall distance from the flange to where the level is controlled (indicated by A in Figure 2-6),
since the high pressure affects the dielectric properties of the vapor causing an error in distance

measured, see Table 2-1 on page 8
percentage of distance measured. Even if DVC is used and corrects the error of 8.6% at 681 psi
(47 bar) to 2 %, the 2% error may be larger than desired.

Figure 2-6. Limiting the overall distance A helps to minimize accuracy errors caused by the
vapor

Section 2: Installation Considerations

September 2013

(1)

. The overall error increases with the pressure and is a

A

A

Table 2-3. The error in distance with and without DVC at a pressure of 600 psi (41 bar)

Distance A Error with no correction Error corrected to 2% with DVC

100 in. (2540 mm) - 7.6 in. (- 193 mm) - 2 in. (- 50.8 mm)

50 in. (1270 mm) - 3.8 in. (- 96.5 mm) - 1 in. (- 25.4 mm)

NOTE:

DVC has a minimum distance requirement from the flange to the upper inlet to dynamically
compensate up to level 100%. See Figure 2-9 on page 18 for details.

For example, if a GWR is installed in a chamber that covers the full height of a 10 ft (3 m) tank,
the distance to the surface level may be as much as 9 ft (2.75 m). A 2% error over 9 ft (2.75 m) is

2.16 in. (54.9 mm). If a shorter system is used, such as the minimum size needed to replace the
14 in. (355.6 mm) displacer (approximately 35 in. (889 mm) total), then the overall distance to
the surface would be about 24 in. (609.6 mm). With this distance, the 2% error shrinks to
± 0.48 in. (12.3 mm).

For further guidelines for choosing and installing radar in chambers or stilling wells, see the
Guidelines for Choosing and Installing Radar in Stilling Wells and Bypass Pipes (Document No.
00840-0300-4024), and Replacing Displacers with Guided Wave Radar (Document No.
00840-2200-4811) Technical Notes.

(1) See the Using Guided Wave Radar for Level in High Pressure Steam Applications Technical Note (Document No.

00840-0100-4530) for details.

Installation considerations

13

Section 2: Installation Considerations

September 2013

How to choose reflector length

The long reflector, 20 in. (500 mm), has the best accuracy and is recommended for all chambers
where the dimensions of the chamber allow for it.

If the distance from the flange to the upper inlet is less than 28 in. (710 mm), the short reflector
should be chosen.

This distance is a minimum when dynamic compensation is required within the whole
measuring range from the lower to the upper inlet. If this is not required, the long reflector can
be used and dynamic compensation is possible up to 28 in. (710 mm) from the flange.

However, always ensure that there are no disturbances from inlets etc close to the reference
reflector end when using the 2 in. DVC solution.

DVC calibration

When a transmitter is ordered with the optional DVC, the function is activated from factory and
the special probe is supplied. For the 2 in. solution, a calibration procedure is needed on-site
during the commissioning phase. For the 3 and 4 in. solution, the transmitter is calibrated from
factory and no calibration on-site is normally needed. There are, however, two cases where a
calibration procedure is needed for the 3 and 4 in. solution; if the transmitter is reset to factory
settings which will delete the DVC calibration, or if a different transmitter head is mounted on
the DVC probe.

Reference Manual

00809-0700-4530, Rev AA

If a calibration procedure is needed, this should be performed with an empty chamber at
ambient conditions.

For best performance, it is recommended that the chamber is cleared of any steam and/or
condensate prior to the calibration. See the Reference Manual supplied with the transmitter for
details on the calibration procedure.

Note that Probe End Projection and Signal Quality Metrics are disabled when DVC is enabled. To
minimize errors due to installation, it is recommended that:

 the distance between the chamber and the vessel be kept as short as possible

 connections to the chambers should be large enough to allow good fluid flow through

 the chamber and the piping to it should be well insulated so the fluid temperature is as

close as possible to the vessel temperature

For further information on chamber insulation, see “Insulation” on page 22.

2.3.2 Chamber fabrication and probe selection

Dimensioning the chamber correctly and selecting the appropriate probe is key to success in
guided wave radar applications. Either follow the recommendations below and have the
chamber manufactured accordingly, or purchase the Rosemount 3300 or 5300 Series
transmitter bundled with the Rosemount 9901 Chamber where Emerson has already
incorporated these best practices. See the Rosemount 9901 Chamber for Process Level Instru­mentation Product Data Sheet (Document No. 00813-0100-4601) for a 9901 model code
example.

14

The recommended chamber diameter is 3 in. (75 mm) or 4 in. (100 mm). Chambers with a
diameter less than 3 in. (75 mm) may cause problems with build-up and it may also be difficult

Installation considerations

Reference Manual

00809-0700-4530, Rev AA

to center the probe. Chambers larger than 6 in. (150 mm) can be used, but provide no
advantages for the radar measurement

When specifying a chamber, it is also important to consider the physical weight of the
instrument and chamber, the properties of the liquid, and the chance of plugging due to the
build-up of deposits.

The location of the side-pipes and the effective measurement range is determined by the
mating tank connections. There are no diameter requirements for the side-pipes, but build-up
and clogging should be taken into consideration.

The recommended inlet pipe diameter is not less than 1 in. (25 mm) for water (filtered minimal
quality), lube oil, or liquids with similar viscosity. For fuel oil, bunker oil, that is liquids with
higher viscosity, the minimum recommended inlet pipe diameter is 2 in. (50 mm).

Note that the diameter of the inlet pipe should always be less than the chamber diameter.
Ensure that the inlet pipes do not protrude into the chamber because they may interfere with
the radar measurement. Always use the same material of construction for the chamber and the
tank or mechanical tensions can arise in the side-connections.

In hot applications, it is recommended to keep the length of the inlet pipes as short as possible
to minimize temperature drop between tank and chamber.

(1)

Section 2: Installation Considerations

September 2013

.

To simplify the verification process of the Rosemount GWR transmitters, venting is
recommended to manipulate the level in the cage and to drain the cage. A standard integral
cage vent located on the top part of the chamber (typical position is right below the flange), and
a drain at the bottom of the chamber, are suitable. Refer to the Rosemount 9901 Series Product
Data Sheet (Document No. 00813-0100-4601) for information. The vent and drain make it
possible to isolate the whole chamber during fill/drain procedures.

For the Rosemount 5300 Series with DVC special considerations to chamber dimensioning
apply. A 3 or 4-in. (75 or 100 mm)

(2)

inner diameter bypass chamber with flanges appropriately
sized for the pressure and temperature of the application is required. Materials used for the
chamber should meet ASME boiler code requirement and the chamber should be isolated from
the boiler or HP heater by valves.

With the Rosemount GWR transmitters it is recommended that single probes in chambers be

(3)

used

. The single lead probe can tolerate any magnetite layer that may occur. The probe must
not touch the chamber wall and should extend the full height of the chamber, but should not
touch the bottom of the chamber. Allow for transition zones (varies with probe type and
dielectric of the media), see Table 2-5 on page 17. Also consider type of flushing connection to
simplify calibration verification, and cleaning.

Probe type selection depends on the probe length:

Probe length is less than 3 ft (1 m): Use a single rigid probe and no centering disk is needed

(4)

.

(1) The single probe creates a virtual coaxial probe with the chamber as the outer tube which helps to amplify the signal returned

from the media.
(2) It is possible to use a chamber with a 2 in. (50 mm) inner diameter, but not recommended as best practice.
(3) The single probe creates a virtual coaxial probe with the chamber as the outer tube. The extra gain provided by the twin and

coaxial probes is not necessary; the electronics in the Rosemount 5300 Series is very sensitive and is not a limiting factor.
(4) The transition zones, and the height of the weight, limit the usage of single flexible probes shorter than 3 ft (1 m).

Installation considerations

15

Section 2: Installation Considerations

Make sure that the probe
does not come into contact
with the chamber wall, e.g.
by using a centering disk.

A clearance distance
of 1 in. (25 mm)
between the probe
end and the cage
bottom is
recommended.

September 2013

Probe length is between 3 ft (1 m) and 10 ft (3 m)

single probe with weight and a centering disk. The rigid single is easier to clean and has smaller
transition zones, while the flexible single requires less head-space during installation and is less
likely to be damaged.

Reference Manual

00809-0700-4530, Rev AA

(1)

: Use either a rigid single or a flexible

Probe length is more than 10 ft (3 m)

(1)

: Use a flexible single probe with weight and a

centering disk. Minimum chamber diameter is 3 in. (75 mm).

For very narrow chambers with a diameter less than 2 in. (50 mm), a coaxial probe can be used
to help reduce the impact of possible disturbances, such as splashing from upper inlet pipes.
However, since the coaxial probe is more sensitive to build-up, it is only recommended for very
clean liquids. For a chamber with a diameter equal to or larger than 3 in. (75 mm), the single lead
probe is therefore the preferred choice.

NOTE:

For the coaxial probe, the minimum chamber diameter is 1.5 in. (837.5 mm).

Figure 2-7. Improper and proper probe positions

(1) For a Rosemount 5300 Series with DVC, only rigid probes are available in lengths up to 13 ft (4 m).

16

To avoid bending the probe (rigid probes), or twisting (flexible probes), and coming into contact
with the chamber wall a small clearance distance between the centering disk and the chamber
bottom is recommended. A clearance distance of 1 in. (25 mm) is suggested assuming a dome
shaped chamber bottom, which may prevent the centering disk from reaching the bottom.

Transition zones, located at the very top and bottom of the probes, are regions where
measurement performance is reduced. Different factors affect the size of the transition zones ­probe type, centering disk or no centering disk, and the material and media measured (see

Ta bl e 2 - 5). The weight on the flexible probes reduces the measurement range. Therefore, it is

recommended to size the cage (A, C) so it does not interfere with the effective measurement
range (B). The transition zones also limit the minimum probe length.

Installation considerations

Reference Manual

A > Upper transition zone

B = Effectice measuring
range, determined by
mating tank connections

C > Lower transition zone
including weight height
(for flexible probes) and
clearance distance

Single
rigid

Probe/
chamber
diameter
must be
3 in. or 4 in.
(7.5 cm or
10 cm)

Use centering
disks for probes >
3 ft (1 m)

Single flexible
for chambers >
3 ft (1 m)

Probe/chamber
diameter must be
3 in. or 4 in.
(7.5 cm or 10 cm)

Always use a
centering disk

00809-0700-4530, Rev AA

Table 2-4. Transition zones for the Rosemount 3300 Series installed in metallic pipes

Table 2-5. Transition zones in chambers for the Rosemount 5300 Series installed in

Section 2: Installation Considerations

Upper Transition Zone Lower Transition Zone

Probe Size

Single Rigid 4 in. (10 cm) 4 in. (10 cm) 2 in. (5 cm) 4 in. (10 cm)
Single Flexible 5.9 in. (15 cm) 8 in. (20 cm) 7.5 in. (19 cm) 10.2 in. (26 cm)
Coaxial 4 in. (10 cm) 4 in. (10 cm) 1.2 in. (3 cm) 2 in. (5 cm)

High Dielectric Low Dielectric High Dielectric Low Dielectric

metallic pipes

September 2013

Dielectric

Constant

Rigid Single

(1),(2)

Lead

Rigid Single

Lead,

Flexible Single

Lead

(1)

with metallic

centering disk

(4)

Upper
Transition
Zone

(5)

Lower
Transition
Zone

(1) Single probes are the preferred choice.
(2) Rigid Single Lead probe without SST centering disk or with a PTFE centering disk.
(3) Coaxial should only be used for very clean or low DC applications.
(4) The distance from the upper reference point where measurements have reduced accuracy, see A in Figure 2-8.
(5) The distance from the lower reference point where measurements have reduced accuracy, see C in Figure 2-8.

80 (water) 4.3 in. (11 cm) 4.3 in. (11 cm) 4.3 in. (11 cm) 4.3 in. (11 cm)

2 (oil) 6.3 in. (16 cm) 6.3 in. (16 cm) 7.1 in. (18 cm) 4.3 in. (11 cm)

80 (water) 2 in. (5 cm) 2 in. (5 cm) 5.5 in. (14 cm) 4 in. (10 cm)

2 (oil) 2.8 in. (7 cm) 8 in. (20 cm) 7.5 in. (19 cm) 5.5 in. (14 cm)

Figure 2-8. Measuring zones in chambers

Coaxial

(3)

Installation considerations

17

Section 2: Installation Considerations

September 2013

An example using the guidelines for fabrication of cages (see Table 2-5 on page 17 for
transition zones).

Assuming level measurement of oil (worst-case): A > 6.3 in. (16 cm) and C > 9.8 in. (25 cm) for a
rigid single probe with a metallic centering disk, and A > 7.1 in. (18 cm) and C > 9.4 in. (24 cm)
for a single flexible probe with a standard weight. There is a 2 in. (5 cm) clearance between the
cage bottom and the end of the probe included in the C-dimensions.

For the Rosemount 5300 Series with DVC a minimum distance from the flange to the surface
level is required to measure the change in the vapor dielectric constant. This minimum distance
(X in Figure 2-9) is 22 in. (560 mm) for the short reflector, and 28 in. (710 mm) for the long
reflector, to dynamically compensate up to level 100%. The minimum measuring range for this
functionality is 12 in. (300 mm). If a Rosemount 5300 Series transmitter is ordered from
Rosemount together with a 9901 Chamber, these space requirements are met.

When the distance between the mounting flange and the surface is less than X (see Figure 2-9),
the function switches from dynamic to static vapor compensation using the last known vapor
dielectric constant.

NOTE:

The distance requirements (X in Figure 2-9) stated above only apply if dynamic compensation is
required within the whole measuring range from lower to upper inlet. However, always ensure
that there are no disturbances from inlets etc. close to the reference reflector end.

Reference Manual

00809-0700-4530, Rev AA

Figure 2-9. DVC minimum distance

X

Level: 100%

Minimum measuring range:
12 in. (300 mm)

Level: 0%

Table 2-6. Minimum distance X

18

Probe Length Reflector Minimum Distance X

35 - 158 in. (900 - 4000 mm) 14 in. (350 mm) 22 in. (560 mm)
43 - 158 in. (1100 - 4000 mm) 20 in. (500 mm) 28 in. (710 mm)

Installation considerations

Reference Manual

Cryogenic
Seal

High Pressure
Seal

Standard Seal

High
Temperature/
High Pressure
Seal

5000 (345)

3524 (243)

2940 (203)

580 (40)

-14 (-1)

Pressure psig (bar)

-320 (-196) -76 (-60) -40 (-40) 302 (150) 392 (200) 752 (400)

Temperature
°F (°C)

00809-0700-4530, Rev AA

Section 2: Installation Considerations

2.3.3 Chamber mounting

Chambers should be mounted onto the tank to correspond with the desired measurement and
area of control. This is often a small portion of the overall height. For further information on
chamber mounting in the control area, see “DVC installation best practices” on page 12.

2.3.4 Existing chambers

Retrofitting of existing chambers is very common, especially when replacing old mechanical
devices such as displacers. For further information, see the Replacing Displacers with Guided
Wave Radar Technical Note (Document No. 00840-2200-4811).

If an existing chamber is used, a spool piece might need to be added. For further information on
installation with a spool piece, see “DVC installation best practices” on page 12.

2.3.5 Pressure and temperature specifications

The following diagram gives the process temperature (maximum product temperature at the
lower part of the flange) and pressure ratings for chamber/ tank connections of the Rosemount
3300 and 5300 Series.

September 2013

NOTE:

The process seal pressure and temperature specifications must comply with the design
temperature and the design pressure for the application. In a chamber installation, there may be
temperature differences between the chamber and the tank.

Figure 2-10. Recommended choice of process seal type

For additional information on pressure and temperature specifications, refer to White paper:
Selecting the correct process seal for Rosemount GWR products Rev 1. September 2009.

When installing a Rosemount GWR transmitter in high temperature applications, it is important

Installation considerations

to consider the ambient temperature. The Rosemount 5300 Series transmitter electronics have
requirements for maximum ambient temperature of 140 °F (60 °C), 158 °F (70 °C), or 176 °F
(80 °C) (limits depend on Ex approval, and Hart vs. FF protocol), refer to the product-related

19

Section 2: Installation Considerations

-320 (-196)

-40 (-40)

-40 (-40)

-17 (-27)

Ambient temperature °F (°C)

Process
temperature
°F (°C)

September 2013

Product Data Sheet for more information. The ambient temperature is affected by the process
temperature. Figure 2-11 shows the ambient temperature vs. process temperature.

Figure 2-11. Ambient temperature vs. process temperature

Reference Manual

00809-0700-4530, Rev AA

NOTE:

The final maximum ambient temperature rating depends on the type of approval.

In high temperature applications, the ambient temperature limit of the electronics may be
exceeded when mounted close to the vessel. To prevent this, the remote connection described
in the next section should be considered.

2.3.6 Remote housing

A remote housing connection can be used with Rosemount 5300 Series Superior Performance
GWR transmitters to enable reliable measurement in environments where very high ambient
temperatures or excessive vibrations exist at the mounting location of the vessel. It enables the
transmitter electronics to be mounted away from the probe, such as to lower the ambient
temperature, or to place the housing in a better location, for example to be able to read the
display, or enable installation in tight spaces.

The remote housing connection is specified to handle 302 °F (150 °C). The cable used is an SST
flexible armored coaxial cable which is delivered with a mounting bracket for wall or pipe
mounting.

The remote housing connection is available in lengths of 3.2 ft (1 m), 6.5 ft (2 m), or 9.8 ft (3 m).

20

Installation considerations

Reference Manual

00809-0700-4530, Rev AA

Figure 2-12. Rosemount 5300 Series with remote housing

When the remote housing is used together with the Rosemount 5300 Series, there may be a
limit on measuring range and a decrease in accuracy. This is because the remote housing
introduces a double bounce in the tank signal at 1.5 times the remote housing cable length.
Because the double bounce occurs at approximately 1.5 times the remote housing cable length,
a longer remote housing cable can increase the maximum measuring range for distances up to
10 ft (3 m). Ta b le 2 - 7 shows the maximum recommended measuring range with remote
housing for different remote housing lengths, installation types, dielectric constants, and probe
types.

Section 2: Installation Considerations

September 2013

Table 2-7. Rosemount 5300 Series remote housing measuring range

Dielectric

Constant

Chamber / pipe

1 m
Remote
Housing

2 m
Remote
Housing

3 m
Remote
Housing

(1) Accuracy may be affected up to +
(2) Required chamber/pipe size is 3 or 4 in. (75 -100 mm).

installations ≤ 4 in.
(100 mm)

Tank installations

Chamber / pipe
installations ≤ 4 in.
(100 mm)

Tank installations

Chamber / pipe
installations ≤ 4 in.
(100 mm)

Tank installations

2

80

2

80

2

80

2

80

2

80

2

80

1.2 in. (30 mm).

Rigid Single

8 mm

10 ft (3 m)
10 ft (3 m)

4 ft (1.25 m)
10 ft (3 m)

10 ft (3 m)
10 ft (3 m)

9 ft (2.75 m)
10 ft (3 m)

10 ft (3 m)

(1)

(1)

(1)

(1)

Rigid Single

13 mm

15 ft (4.5 m)
15 ft (4.5 m)

4 ft (1.25 m)
10 ft (3 m)

15 ft (4.5 m)
15 ft (4.5 m)

9 ft (2.75 m)
10 ft (3 m)

15 ft (4.5 m)
15 ft (4.5 m)

14 ft (4.25 m)
15 ft (4.5 m)

(1)

(1)

(1)
(1)

(1)

(1)

Flexible Single

(1)

33 ft (10 m)
33 ft (10 m)

4 ft (1.25 m)
159 ft (48.5 m)

33 ft (10 m)
33 ft (10 m)

9 ft (2.75 m)
154 ft (47 m)

33 ft (10 m)
33 ft (10 m)

14 ft (4.25 m)
149 ft (45.5 m)

(2)

(1) (2)

(1)

(1) (2)
(1) (2)

(1)

(1) (2)
(1) (2)

(1)

Installation considerations

21