®

LVCN6000/7000 SeriesCapacitive Point Level Detection

®

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Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Models & Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Relay Status Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Warranty & Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Contents

03

04

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Introduction

The LVCN Series are capacitance switches ideal for High/Low level detection forliquid, solids, granular materials and pastes. These units can also detect levelwithout being in contact with the product through a sight glass. Unlike othercapacitance probes, the LVCN6000/7000 can detect conductive, non-conductive orlow dielectric materials with extremely accurate performance without requiring anexternal reference or installation in a metal vessel.

The sensor operates in a manner that is similar to a simple capacitor. A highfrequency oscillator is located within the tip of the probe. When the tip of the probecomes in contact with the medium, the frequency of the oscillation reaches a presetpoint and the detection circuit signals the switch to change state.

Technology

Both models can be made with cable or rod rigid stainless steel giving more flexibilityto complex applications.

Features

No Moving Parts – Rugged Construction

Highly customizable:

POM (Polyoxymethylene), PTFE or PVC Sensing Tip

Available in DC or Universal Power Supply versions

Almost completely immune from build-up, coating media aggressive products

Easily applied in a wide range of applications/industries such as: water, oils,corrosives, solids, powders, grains, conductive as well as non-conductive medias.

Extended Lengths with both Rigid 316 rod or Cable

Threaded, Flange or Sanitary Process Connections

LVCN6000/7000Capacitive Point

Level Detection

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Threaded Connections

3/4”

1 ½”

1”

2”

Housing Options

Mounting Options for LVCN6000/7000

Process Connections

120m

m

1,75

NPT

15mm

BSP

70m

m

PTFE or PVC Standard

3/4” or 1” NPT

20mm

1 ½”

2 ½”

2”

3”

Tri-Clamp Connection

80m

m

Models and Dimensions

20mm

1 ½” NPT

Extended Length

TC Connection

Rubber Seal

Process Connection

L50

mm 20mm

1 ½”

2 ½”

Flange Connections

2”

1”

Cable Extension

FF

RF

90m

m

50m

m

ANSI 300#

05

ANSI 150#

20mm

13

0m

m130mm 118mm

76

mm

89mm 80mm

Nylon Aluminum

50m

m 20mm

120m

m

Minimum SizesPTFE or PVC Tip

POM Standard

06

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1 2 3 4 5 6

NO24Vdc

ON

C NC

Relay Contact5A-250Vac

L2

L1

L3

P1P2

Power Supply24Vdc

L1 - Power ON (Green)

L2 - Output Status (Red

L3 - Sensor Status (Delay) Yellow

P1 - Sensibility Adjustment

P2 - Time Delay Adjustment

H

L

1

8

+ -

2

9

3 4 5 6 7

5

01

2

34 6

7

8

9

10

Sensitivity

10

120 sec.

LVCN6000

NO

24Vdc

NC

Delay

Time Delay Adjustment

Sensitivity Adjustment

LVCN6000 Aluminum Housing

LVCN7000 Nylon Housing

Power Supply

L1 L2L3

P2P1

12 -3 - Ground4 -5 -6 -

- Power SupplyPower Supply

7 -

8 - Positive DC9 - Negative DC

CommonNO ContactCommonNC Contact

12 - Negative DC3 - Ground4 -5 -6 -

- Positive DC

NO ContactCommonNC Contact

Wiring Diagram

80....260Vac

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Relay Status Guide

Switch Position

Probe covered

Probe covered

Probe uncovered

Maximumfail-safe

Minimumfail-safe

Probe uncovered

Level NO - NC Red LEDYellow LEDGreen LED

H

L

ON ONON

ON

ON

OFF

OFF

OFF

OFF

ON

ON

ON

6

6

6

6

7

7

7

7

4

4

4

4

5

5

5

5

Probe covered

Probe uncovered

Level SPDT Red LEDYellow LEDGreen LED

64 5

64 5

ON ONON

ON OFF OFF

LVCN6000

LVCN7000

08

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Verify that the location the probe is to be mountedis clear from the stream of product (Fig. 1).

When installing more than one probe in yourprocess, verify that they are separated by aminimum distance of 500mm (Fig. 1).

Material falling onto the probe can cause damageor switching errors. If this is unavoidable, it isrecommended that a protective shield be installedabove the probe to protect it. The shield is alsorecommended when the probe is use for a lowlevel switch or in the outflow of the product (Fig. 2).

The tip of the probe should slightly pointdownward ( when possible) so that if there are anyexcess of product it will easily slide from the probe(Fig. 2).

When installing from the top of the tank confirmthat the tip of the probe has cleared the side of thevessel at least 500mm (Fig. 3).

When installing the sensor directly to the tankmake sure that the rod extends beyond the innerwall of the tank, by as much as possible, so thatinternal build up or other debris does not interferewith the sensor's performance (Fig. 2 correct Fig.4 incorrect).

Installation

Installation

500m

m

500m

m

500mm

Fig. 1

Fig. 3

Fig. 4

ShieldFig. 2

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Installation

For probes with cable extensions, installationshould be from the top of the tank. It is alsorecommended that for these probes the processshouldn't have any agitation as this can causefluctuating readings or damage to the probe(Fig. 5).

The LVCN with rigid rod is recommended forapplications that have turbulence or vorticesthroughout use (Fig.6).

Ensure that the conduit is facing downward toavoid water from entering the housing (Fig. 7).

Verify that the probe has been wired as per theinstructions on page 7.

The probe must be installed utilizing the type ofconnection provided.

The Capacitance Probes Series will not workproperly in viscous, coating mediums with highsalt content (high di-electric), especially whenmounting from the side of the vessel. Sitron doesnot recommend using this product in this type ofapplication unless otherwise specified.

Caution:

Before installing the probe, ensure that theavailable power supply is correct.

Verify that the operating pressure andtemperature of the process corresponds to theoperating parameters of the probe.

Fig. 5

Fig. 7

Fig. 6

10

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Calibration

1. Turn both potentiometers (P1 and P2) fullycounterclockwise before you begin (Fig. 1).

2. Install the probe and power it on. The L1 greenLED should be on.

3. With the vessel empty (or the medium not incontact with the sensor), turn the sensibilitypotentiometer (P1) clockwise until the yellowLED (L3) turns On. Mark that location on theelectronics' label using a pencil. If this LED (L3)does not turn on, mark the maximum position onthe label with a pencil (Fig. 2).

4. Fill the vessel until the medium is in contactwith the sensor.

5. Turn the potentiometer (P1) counter-clockwiseuntil the yellow LED (L1) turns Off. Mark thelocation where the yellow LED shuts off on theelectronics' sticker using a pen or pencil. If theLED does not turn Off, leave the potentiometercompletely turned counter-clockwise (Fig. 3).

6. Now that you have marked minimum andmaximum settings for your particular application,turn the sensibility potentiometer (P1) clockwisehalf way between the two pencil marks. This pointshould be the ideal setting where the probe isneither too sensitive or not sensitive enough.This method of calibration should also preventfalse alarms.

5

5

5

5

0

0

0

0

1

1

1

1

2

2

2

2

3

3

3

3

4

4

4

4

6

6

6

6

7

7

7

7

8

8

8

8

9

9

9

9

10

10

10

10

Sensitivity

Sensitivity

Sensitivity

Sensitivity

10

10

10

10

1

1

1

1

20 sec.

20 sec.

20 sec.

20 sec.

LVCN

LVCN

LVCN

LVCN

Delay

Delay

Delay

Delay

L1

L1

L1

L1

L2

L2

L2

L2

L3

L3

L3

L3

P2

P2

P2

P2

P1

P1

P1

P1

Fig.1

Fig.2

Fig.3

Fig.4

DelayAdjust the delay time from 0,1 to 20 seconds

by setting potentiometer P2.

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Handling

When cleaning the rod use a soft brush or anyother similar object.

Probes:

Periodic visual inspection of the probe is requiredto check for corrosion or deposit build-up. Ifdeposits are found, clean the sensor to ensureoptimum performance.

The probe should not be dropped or suffer anyimpact or fall that could damage the electronics orthe plastic tip of the probe (Fig. 4 and 5).

Seal the thread with Teflon tape beforeinstallation (Fig. 1).

Do not turn or handle by the housing whentightening the process connection. However, thehousing is suitable to be reoriented by once theprocess connection has been tighten.(Fig. 2).

Use the correct tool during installation (Fig. 3)

Fig. 5

Fig. 4

Fig. 3

Fig. 2

Fig. 1

12

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Technical Specifications

LVCN7000

2VA

5MHz

Level switch for liquids solids and granular

Cable gland - ½”NPT cond. entry or M12 connector

POM (Polyoxymethylene), PTFE or PVC

24 Vdc +/- 10%

Relay (SPDT) 5A max (250Vac)

Potentiometer - Switch Point

Potentiometer 1 to 20 seconds

Led status on/off

3/4” to 1 1/2” BSP or NPT flange or sanitary connections

Glass filled nylon

145 PSI (10 Bar)

14 to 176º F (-10 to 80ºC)

IP 65

Current Consumption

Frequency oscilation

Enclosure Material

Process Connection

Operating Temperature

Electrical Connection

Application

Operating Voltage

Output

Adjustment

Time Delay

Level indication

Wetted Material

Class Protection

Max pressure

1 2 3 4 5 6

NO24Vdc

ON

C NC

SC700

L2

L1

L3

P1P2

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Technical Specifications

LVCN6000

4VA

5MHz

Level switch for liquids solids and granular

Cable gland - ½”NPT cond. entry or M12 connector

POM (Polyoxymethylene), PTFE or PVC

85...230 Vac

24 Vdc

Relay (NO + NC) 5A max (250Vac)

Potentiometer - Switch Point

Potentiometer 1 to 20 seconds

Led status on/off

3/4” to 1 1/2” BSP or NPT flange or sanitary connections

Glass filled nylon, Aluminium

145 PSI (10 Bar)

14 to 176º F (-10 to 80ºC)

IP 65

Current Consumption

Frequency oscilation

Enclosure Material

Process Connection

Operating Temperature

Electrical Connection

Application

Operating Voltage

Output

Adjustment

Time Delay

Level indication

Wetted Material

Class Protection

Max pressure

H

L

1

8

+ -

2

9

3 4 5 6 7

5

01

2

34 6

7

8

9

10

Sensitivity

10

120 sec.

SC 700

NO

24 Vdc

NC

Delay

L1 L2L3

P2P1

14

®

Fault Cause Solution

Trouble Shooting

Doesn’tPower Up

Doesn’tDetect Medium Low sensibility Adjust sensibility trimpot

Always On Build up on the sensor Clean sensor thenadjust sensibility

Green LED OffNo power Verify current supply

Bad contact Verify cable connection