Pepperl+Fuchs LGC2 Manuel

ISO9001

Level Probe LGC2

Hydrostatic Level

Measurement

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".

Level Probe LGC2

Application

The device is a pressure sensor for hydrostatic level measurement.

Pepperl+Fuchs offers three different versions of the device:

• Device with a stainless steel housing, external diameter of 22 mm (0.87 inch):

This version is excellently suited to drinking water applications and for use in bore holes and wells with

small diameters

• Device with a stainless steel housing, external diameter of 42 mm (1.65 inch):

Heavy-duty version and easy to clean thanks to flush-mounted process isolating diaphragm, ideally

suited to wastewater and wastewater treatment plants

• Device with plastic insulation, external diameter of 29 mm (1.14 inch):

Robust version for use in salt water and excellently suited to applications on ships (e. g. ballast water

tanks)

Your benefits

• High resistance to overload

• High-precision, robust ceramic measuring cell with long-term stability

• Climate proofed sensor thanks to completely potted electronics and 2-filter pressure compensation

system

• Simultaneous measurement of level and temperature with optionally integrated Pt100 resistance

thermometer

• Accuracy

• Standard reference accuracy ±0.2 %

• Plantinum version ±0.1 %

• Automatic density compensation to increase accuracy

• Usage in drinking water: KTW, NSF, ACS

• Approvals: ATEX, FM, CSA

• Extensive range of accessories provides complete measuring point solutions

Level Probe LGC2

Content

2017-02

1 Important Document Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1 Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2 Terms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.3 Turn down calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2 Function and System Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1 Device Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.2 Measuring Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.3 Measuring System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.4 Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.5 System Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3 Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.1 Measured Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.2 Measuring Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.3 Input Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1 Output Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.2 Signal Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.3 Maximum Load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5 Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.1 Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.2 Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.3 Current Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.4 Connecting the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.5 Terminals in the Terminal Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.6 Probe Connection (Extension Cable) . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.7 Cable Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.8 Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.9 Residual Ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2017-02

Level Probe LGC2

Content

6 Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.1 Reference Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2 Reference Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.3 Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.4 Long-Term Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.5 Influence of Medium Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.6 Warm-up Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.7 Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.1 Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.2 Additional Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.3 Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.4 Technical Data for Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.5 Cable Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.6 Cable Shortening Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8 Ambient Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

8.1 Ambient Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

8.2 Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

8.3 Degree of Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

8.4 Electromagnetic Compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . . . . . 32

8.5 Surge Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9 Process Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

9.1 Medium Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

9.2 Medium Temperature Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

10 Mechanical Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

10.1 Dimensions of the Level Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

10.2 Dimensions of the Suspension Clamp . . . . . . . . . . . . . . . . . . . . . . . . . 35

10.3 Dimensions of Cable Mounting Screw . . . . . . . . . . . . . . . . . . . . . . . . . 35

10.4 Dimensions of Terminal Box IP66, IP67 with Filter. . . . . . . . . . . . . . . 36

Level Probe LGC2

Content

2017-02

10.5 Dimensions of the HUT Temperature Head Transmitter . . . . . . . . . . 37

10.6 Terminal Box with Integrated HUT Temperature Head Transmitter . 37

10.7 Additional Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

10.8 Testing Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

10.9 Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

10.10 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

11 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

12 Certificates and Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

12.1 CE Mark. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

12.2 Approvals for hazardous area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

12.3 Potable Water Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

12.4 Other Standards and Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

12.5 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

12.6 Calibration, Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

12.7 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

13 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

13.1 Product Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

13.2 Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

13.3 Configuration Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

14 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

15 Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

15.1 Technical Information (TI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

15.2 Brief Instructions (KA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

15.3 Manual (BA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

15.4 Instruction Manuals (SI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

15.5 Potable Water Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

16 Registered Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

2017-02

Level Probe LGC2

Important Document Information

1 Important Document Information

1.1 Document Conventions

1.1.1 Symbols Used

This document contains symbols for the identification of warning messages and of informative

messages.

Warning Messages

You will find warning messages, whenever dangers may arise from your actions. It is

mandatory that you observe these warning messages for your personal safety and in order to

avoid property damage.

Depending on the risk level, the warning messages are displayed in descending order as

follows:

Informative Symbols

Action

This symbol indicates a paragraph with instructions. You are prompted to perform an action or

a sequence of actions.

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 the device and any connected systems and plants, or result in

their complete failure.

Note!

This symbol brings important information to your attention.

Level Probe LGC2

Important Document Information

2017-02

1.1.2 Electrical symbols

1.1.3 Symbols for certain types of information

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

Allowed

Indicates procedures, processes or actions that are allowed.

Preferred

Indicates procedures, processes or actions that are preferred.

Forbidden

Indicates procedures, processes or actions that are forbidden.

1., 2., 3. ... Series of steps

Result of a sequence of actions

Visual check

Table 1.2

2017-02

Level Probe LGC2

Important Document Information

1.1.4 Symbols in graphics

1.2 Terms and Abbreviations

Figure 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 1.3

,…

,1. 2. 3.

URL OPLMWP

LRL

LRV URV

Level Probe LGC2

Important Document Information

2017-02

Position Terms/abbreviations Explanation

1OPL The OPL (over pressure limit = sensor overload limit) for

the measuring device depends on the lowest-rated

element, with regard to pressure, of the selected

components, i. e. the process connection has to be taken

into consideration in addition to the measuring cell. Also

observe pressure-temperature dependency. For the

relevant standards and additional notes, see the

"Pressure specifications" section.

The OPL may only be applied for a limited period of time.

2MWP The MWP (maximum working pressure) for the sensors

depends on the lowest-rated element, with regard to

pressure, of the selected components, i. e. the process

connection has to be taken into consideration in addition

to the measuring cell. Also observe pressure-

temperature dependency. For the relevant standards

and additional notes, see the "Pressure specifications"

section.

The MWP may be applied at the device for an unlimited

period. The MWP can also be found on the nameplate.

3Maximum sensor

measuring range

Span between LRL and URL

This sensor measuring range is equivalent to the

maximum calibratable/adjustable span.

4Calibrated/adjusted

span

Span between LRV and URV

Factory setting: 0 to URL

Other calibrated spans can be ordered as customized

spans.

p – Pressure

–LRL Lower range limit

–URL Upper range limit

–LRV Lower range value

–URV Upper range value

–TD (Turn down) Turn down: Example see the following section.

–PE Polyethylene

–FEP Fluorinated ethylene propylene

Table 1.4

2017-02

Level Probe LGC2

Important Document Information

1.3 Turn down calculation

Figure 1.2

Example

• Sensor: 10 bar (150 psi)

• Upper range value (URL) = 10 bar (150 psi)

• Calibrated/adjusted span: 0 to 5 bar (0 to 75 psi)

• Lower range value (LRV) = 0 bar (0 psi)

• Upper range value (URV) = 5 bar (75 psi)

TD = URL/(URV –LRV)

TD = 10 bar (150 psi)/(5 bar (75 psi) –0bar(0psi))=2

In this example, the TD is 2:1. This span is based on the zero point.

1Calibrated/adjusted span

2Zero point-based span (4 to 20 mA analog: customer-specific span can only be set at the

factory when ordered)

3Upper range value

LRV URLURV

LRL

1 = 2

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