Omega LVCN6000 series User manual

®
LVCN6000/7000 Series
Capacitive Point Level Detection

®

www.omega.com e-mail: [email protected]
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 – 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
LVCN6000/7000
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
456
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
+-
2
9
34567
5
0
1
2
3
46
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 L2
L3
P2P1
1
2-
3 - Ground
4-
5-
6-
- Power Supply
Power Supply
7-
8 - Positive DC
9 - Negative DC
Common
NO Contact
Common
NC Contact
1
2 - Negative DC
3 - Ground
4-
5-
6-
- 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
45
6
45
ON ONON
ON OFF OFF
LVCN6000
LVCN7000

08
®
Verify that the location the probe is to be mounted
is clear from the stream of product (Fig. 1).
When installing more than one probe in your
process, verify that they are separated by a
minimum distance of 500mm (Fig. 1).
Material falling onto the probe can cause damage
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 or in the outflow of the product (Fig. 2).
The tip of the probe should slightly point
downward ( when possible) so that if there are 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 least 500mm (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 from entering the housing (Fig. 7).
Verify that the probe has been wired as per the
instructions on page 7.
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 otherwise specified.
Caution:
Before installing the probe, ensure that the
available power supply is correct.
Verify that the operating pressure and
temperature of the process corresponds to the
operating parameters of the 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 be on.
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 with a 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. This point
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 delay time from 0,1 to 20 seconds
by setting potentiometer P2.
®
®
®
®

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 tip of 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
123
456
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
+-
2
9
34567
5
0
1
2
3
46
7
8
9
10
Sensitivity
10
120sec.
SC 700
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