Omega LVCN6000, 7000 User Manual

®

LVCN6000/7000 Series

Capacitive 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

®

Introduction

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

The sensor operates in a manner that is similar to a simple capacitor. A high
frequency oscillator is located within the tip of the probe. When the tip of the probe
comes in contact with the medium, the frequency of the oscillation reaches a preset
point 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 flexibility
to complex applications.

Features

No Moving Parts – RuggedConstruction

Highly customizable:

POM (Polyoxymethylene), PTFEor PVC Sensing Tip

Available in DC or Universal Power Supplyversions

Almost completely immunefrom build-up, coating mediaaggressive products

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

Extended Lengths withboth Rigid 316 rodor Cable

Threaded, Flange orSanitary Process Connections

LVCN6000/7000

Capacitive Point

Level Detection

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Threaded Connections
3/4”

1½”

1”

2”

Housing Options

Mounting Options for LVCN6000/7000

Process Connections

120mm

1,75

NPT

15mm

BSP

70mm

PTFE or PVC Standard

3/4” or 1” NPT

20mm

1½”

2½”

2”

3”

Tri-Clamp Connection

80mm

Models and Dimensions

20mm

1½”NPT

Extended Length

TC Connection

Rubber Seal

Process Connection

L

50mm

20mm

1½”

2½”

Flange Connections

2”

1”

Cable Extension

FF

RF

90mm

50mm

ANSI 300#

05

ANSI 150#

20mm

130mm

130mm

118mm

76mm

89mm

80mm

Nylon

Aluminum

50mm

20mm

120mm

Minimum SizesPTFE or PVC Tip

POM Standard

06

®

12

3

4

5

6

NO

24Vdc

ON

CNC

Relay Contact

5A-250Vac

L2

L1

L3

P1P2

Power Supply

24Vdc

L1 - Power ON (Green)

L2 - Output Status (Red

L3 - Sensor Status (Delay) Yellow

P1 - Sensibility Adjustment

P2 - Time Delay Adjustment

H

L

1

8

+

-

2934567

5

0

1

2

3

46

7

8
9
10

Sensitivity

10

1

20 sec.

LVCN6000

NO

24Vdc

NC

Delay

Time Delay Adjustment

Sensitivity Adjustment

LVCN6000 Aluminum Housing

LVCN7000 Nylon Housing

Power Supply

L1 L2

L3

P2P1

1
2­3 - Ground
4­5­6-

- Power Supply
Power Supply

7-

8 - Positive DC
9 - Negative DC

Common
NO Contact
Common
NC Contact

1
2 - Negative DC
3 - Ground
4­5­6-

- Positive DC

NO Contact
Common
NC Contact

Wiring Diagram

80....260Vac

07

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Relay Status Guide

Switch Position

Probe covered

Probe covered

Probe uncovered

Maximum

fail-safe

Minimum

fail-safe

Probe uncovered

Level

NO-NC

Red LED

Yellow LED

Green 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 LED

Yellow LED

Green LED

6

4

5

6

4

5

ON ONON

ON OFF OFF

LVCN6000

LVCN7000

08

®

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

When installing more than one probe in your
process, verify that they are separated by a
minimum distance of500mm (Fig. 1).

Material falling ontothe probe can causedamage
or switching errors. If this is unavoidable, it is
recommended that a protective shield be installed
above the probe to protect it. The shield is also
recommended when the probe is use for a low
level switch orin the outflow ofthe product (Fig. 2).

The tip of the probe should slightly point
downward ( when possible) so that if thereare any
excess of product it will easily slide from the probe
(Fig. 2).

When installing from the top of the tank confirm
that the tip of the probe has cleared the side of the
vessel at least500mm (Fig. 3).

When installing the sensor directly to the tank
make sure that the rod extends beyond the inner
wall of the tank, by as much as possible, so that
internal build up or other debris does not interfere
with the sensor's performance (Fig. 2 correct Fig.
4 incorrect).

Installation

Installation

500mm

500mm

500mm

Fig. 1

Fig. 3

Fig. 4

Shield

Fig. 2

09

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Installation

For probes with cable extensions, installation
should be from the top of the tank. It is also
recommended that for these probes the process
shouldn't have any agitation as this can cause
fluctuating readings or damage to the probe
(Fig. 5).

The LVCN with rigid rod is recommended for
applications that have turbulence or vortices
throughout use (Fig.6).

Ensure that the conduit is facing downward to
avoid water fromentering the housing (Fig.7).

Verify that the probe has been wired as per the
instructions on page7.

The probe must be installed utilizing the type of
connection provided.

The Capacitance Probes Series will not work
properly in viscous, coating mediums with high
salt content (high di-electric), especially when
mounting from the side of the vessel. Sitron does
not recommend using this product in this type of
application unless otherwisespecified.

Caution:

Before installing the probe, ensure that the
available power supplyis correct.

Verify that the operating pressure and
temperature of the process corresponds to the
operating parameters ofthe probe.

Fig. 5

Fig. 7

Fig. 6

10

®

Calibration

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

2. Install the probe and power it on. The L1 green
LED should beon.

3. With the vessel empty (or the medium not in
contact with the sensor), turn the sensibility
potentiometer (P1) clockwise until the yellow
LED (L3) turns On. Mark that location on the
electronics' label using a pencil. If this LED (L3)
does not turn on, mark the maximum position on
the label witha pencil (Fig. 2).

4. Fill the vessel until the medium is in contact
with the sensor.

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

6. Now that you have marked minimum and
maximum settings for your particular application,
turn the sensibility potentiometer (P1) clockwise
half way between the two pencil marks. Thispoint
should be the ideal setting where the probe is
neither too sensitive or not sensitive enough.
This method of calibration should also prevent
false 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

Delay

Adjust the delaytime from 0,1 to20 seconds
by setting potentiometerP2.

®

®

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11

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Handling

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

Probes:

Periodic visual inspection of the probe is required
to check for corrosion or deposit build-up. If
deposits are found, clean the sensor to ensure
optimum performance.

The probe should not be dropped or suffer any
impact or fall that could damage the electronics or
the plastic tipof the probe (Fig.4 and 5).

Seal the thread with Teflon tape before
installation (Fig. 1).

Do not turn or handle by the housing when
tightening the process connection. However, the
housing is suitable to be reoriented by once the
process 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

®

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

45

6

NO

24Vdc

ON

CNC

SC700

L2

L1

L3

P1P2

13

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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

+

-

2934567

5

0

1

2

3

46

7

8
9

10

Sensitivity

10

1

20sec.

SC700

NO

24Vdc

NC

Delay

L1 L2

L3

P2P1

14

®

Fault

Cause

Solution

Trouble Shooting

Doesn’t

Power Up

Doesn’t

Detect Medium

Low sensibility

Adjust sensibility trimpot

Always On

Build up on the sensor

Clean sensor then

adjust sensibility

Green LED Off

No power

Verify current supply

Bad contact

Verify cable connection