Pepperl+Fuchs Pulscon LTC51 Manuel

ISO9001

Pulscon LTC51

Guided Level Radar

PROCESS AUTOMATION

TECHNICAL INFORMATION

With regard to the supply of products, the current issue of the following document is applicable:

The General Terms of Delivery for Products and Services of the Electrical Industry,

published by the Central Association of the Electrical Industry (Zentralverband Elektrotechnik und

Elektroindustrie (ZVEI) e.V.) in its most recent version as well as the supplementary clause:

"Expanded reservation of proprietorship"

Pulscon LTC51

Application

• Rod, rope or coax probe

• Process connection: Starting 3/4 in thread or flange

• Temperature: -40 ... +200 °C (-40 ... +392 °F)

• Pressure: -1 ... +40 bar (-14.5 ... +580 psi)

• Maximum measuring range: Rod 10 m (33 ft); rope 45 m (148 ft); coax 6 m (20 ft)

• Accuracy: ±2mm(0.08in)

• International explosion protection certificates; WHG; ship building approval; steam boiler approval;

EN 10204-3.1

• Linearity protocol (5-point)

Yo u r b e n e f i t s

• Reliable measurement even for changing product and process conditions

• HistoROM data management for easy commissioning, maintenance and diagnostics

• Highest reliability due to Multi-Echo Tracking

• Hardware and software developed according to IEC 61508 (up to SIL3)

• Seamless integration into control or asset management systems

• Intuitive user interface in national languages

• Easy proof test for SIL and WHG

Pulscon LTC51

Content

2014-10

1 Important document information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.1 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Function and system design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1 Measuring principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2 Life cycle of the product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3 Measuring system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3 Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1 Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2 Measuring range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.3 Blocking distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.4 Measuring frequency spectrum. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.1 Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.2 Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.3 Linearization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.4 Galvanic isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.5 Protocol-specific data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.1 Terminal assignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2 HART Loop Converter KFD2-HLC-Ex1.D.** . . . . . . . . . . . . . . . . . . . . . 28

5.3 Device plug connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

5.4 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

5.5 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.6 Current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.7 Power supply failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.8 Potential equalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.9 Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.10 Cable entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.11 Cable specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.12 Overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

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Pulscon LTC51

Content

6 Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.1 Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.2 Maximum measured error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.3 Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.4 Reaction time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.5 Influence of ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.6 Influence of gas layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.7 Gas phase compensation with external pressure sensor

(PROFIBUS PA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7.1 Mounting requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8 Operating conditions: Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.1 Ambient temperature range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.2 Ambient temperature limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.3 Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.4 Climate class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.5 Altitude according to IEC 61010-1 Ed.3 . . . . . . . . . . . . . . . . . . . . . . . . 66

8.6 Degree of protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.7 Vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.8 Cleaning the probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.9 Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . . . . . 67

9 Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

9.1 Process temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

9.2 Process pressure range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

9.3 Dielectric constant (DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

9.4 Expansion of the rope probes through temperature . . . . . . . . . . . . . 69

Pulscon LTC51

Content

2014-10

10 Mechanical construction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

10.1 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

10.2 Tolerance of probe length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

10.3 Surface roughness of Alloy C coated flanges . . . . . . . . . . . . . . . . . . . 74

10.4 Shortening probes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

10.5 Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

10.6 Materials: A1 (GT19) housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

10.7 Materials: A2 (GT20) housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

10.8 Materials: A3 (GT18) housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

10.9 Materials: Process connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

10.10 Materials: Probe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

10.11 Materials: Mounting bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

10.12 Materials: Adapter and cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

10.13 Materials: Weather protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . 85

11 Operability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

11.1 Operating concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

11.2 Local operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

11.3 Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

12 Certificates and approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

12.1 CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

12.2 C-Tick symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

12.3 Ex approval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

12.4 Dual seal according to ANSI/ISA 12.27.01 . . . . . . . . . . . . . . . . . . . . . . 90

12.5 Functional Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

12.6 Overfill prevention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

12.7 Telecommunications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

12.8 CRN approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

12.9 Other standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

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Pulscon LTC51

Content

13 Ordering information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

13.1 Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

13.2 Product structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

13.3 5-point linearity protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

13.4 Customized parametrization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

14 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

14.1 Device-specific accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

14.2 Communication-specific accessories . . . . . . . . . . . . . . . . . . . . . . . . 105

14.3 Service-specific accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

14.4 System components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

15 Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

15.1 Standard documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

15.2 Safety documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

16 Registered trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

17 Patents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Pulscon LTC51

Important document information

2014-10

1 Important document information

1.1 Symbols

1.1.1 Symbols used

This document contains information that you must read for your own personal safety and to

avoid property damage. Depending on the hazard category, the warning signs are displayed in

descending order as follows:

Safety-relevant symbols

Informative symbols

Action

This symbol indicates a paragraph with instructions.

Danger!

This symbol indicates an imminent danger.

Non-observance will result in personal injury or death.

Warning!

This symbol indicates a possible fault or danger.

Non-observance may cause personal injury or serious property damage.

Caution!

This symbol indicates a possible fault.

Non-observance could interrupt devices and any connected facilities or systems, or result in

their complete failure.

Note!

This symbol brings important information to your attention.

2014-10

Pulscon LTC51

Important document information

1.1.2 Electrical symbols

1.1.3 Symbols in graphics

Symbol Meaning

Direct current

A terminal to which DC voltage is applied or through which direct

current flows.

Alternating current

A terminal to which alternating voltage is applied or through which

alternating current flows.

Direct current and alternating current

• A terminal to which alternating voltage or DC voltage is applied.

• A terminal through which alternating current or direct current

flows.

Ground connection

A grounded terminal which, as far as the operator is concerned, is

grounded via a grounding system.

Protective ground connection

A terminal which must be connected to ground prior to establishing

any other connections.

Equipotential connection

A connection that has to be connected to the plant grounding

system: This may be a potential equalization line or a star grounding

system depending on national or company codes of practice.

Table 1.1

)

Symbol Meaning

1, 2, 3 ... Item numbers

Series of steps

A, B, C, ... Views

A-A, B-B, C-C, ... Sections

Hazardous area

Indicates a hazardous area.

Safe area (non-hazardous area)

Indicates a non-hazardous location.

Table 1.2

,…

,1. 2. 3.

Pulscon LTC51

Function and system design

2014-10

2 Function and system design

2.1 Measuring principle

2.1.1 Basic principles

The device is a "downward-looking" measuring system that functions according to the ToF

method (ToF = Time of Flight). The distance from the reference point to the product surface is

measured. High-frequency pulses are injected to a probe and led along the probe. The pulses

are reflected by the product surface, received by the electronic evaluation unit and converted

into level information. This method is also known as TDR (Time Domain Reflectometry).

Figure 2.1 Parameters for level measurement with the guided radar

2.1.2 Dielectric constant

The dielectric constant (DC) of the medium has a direct impact on the degree of reflection of

the high frequency pulses. In the case of large DC values, such as for water or ammonia, there

is strong pulse reflection while, with low DC values, such as for hydrocarbons, weak pulse

reflection is experienced.

LN Probe length

DDistance

LLevel

RReference point of measurement

EEmpty calibration (= zero)

FFull calibration (= span)

20 mA

100%

4mA

Note!

If, for rope probes, the DC value is less than 7, then measurement is not possible in the area of

the straining weight (0 to 250 mm from end of probe; lower blocking distance).

2014-10

Pulscon LTC51

Function and system design

2.1.3 Input

The reflected pulses are transmitted from the probe to the electronics. There, a

microprocessor analyzes the signals and identifies the level echo which was generated by the

reflection of the high-frequency pulses at the product surface. This clear signal detection

system benefits from over 30 years' experience with pulse time-of-flight procedures.

The distance D to the product surface is proportional to the time of flight t of the impulse:

D = c x t / 2,

where c is the speed of light.

Based on the known empty distance E, the level L is calculated:

L = E –D

The device possesses functions for interference echo suppression that can be activated by the

user. They guarantee that interference echoes from e. g. internals and struts are not

interpreted as level echoes.

2.1.4 Output

The device is preset at the factory to the probe length ordered so that in most cases only the

application parameters that automatically adapt the device to the measuring conditions need

to be entered. For models with a current output, the factory adjustment for zero point E and

span F is 4 mA and 20 mA, for digital outputs and the display module 0 % and 100 %. A

linearization function with max. 32 points, which is based on a table entered manually or semi-

automatically, can be activated on site or via remote operation. This function allows the level to

be converted into units of volume or mass, for example.

2.2 Life cycle of the product

Engineering

• Universal measuring principle

• Measurement unaffected by medium properties

• Hardware and software developed according to SIL IEC 61508

Procurement

• Pepperl+Fuchs being the world market leader in level measurement guarantees asset

protection

• Worldwide support and service

Installation

• Special tools are not required

• Reverse polarity protection

• Modern, detachable terminals

• Main electronics protected by a separate connection compartment

Note!

The reference point R of the measurement is located at the process connection.

See chapter 10.

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