cn1 & cn2 - sitron.com · cn2 dc cn1 dc cn2 dc 5a 250v n1 cable gland ½” bsp, npt or m12...

User’s GuideInstallation, Operation and Maintenance

CN1 & CN2

Conductive Level Switch

Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Electrical Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Mounting Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Models & Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Tecnical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Terms & Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

03

Intoduction

CN1 & CN2


Features

Can operate in all conductive medias.

Easy to install and Set up.

Optional Epoxy or Halar coatings for aggresive medium.

Available with 316SS, Sanitary, Flange or Threaded connections.

Sitron’s CN Series of Conductive Level Switches are designed to control the levelof all conductive medium for up to two different points of level control with sensitivitycontrol and time delay adjustment.

All CN Series units (both in AC and DC voltage supplies) come with integratedinternal electronic relays within the housing. This eliminates the need for a separateremote controller. In addition, these units can be ordered with a built-in referrencerod for applications in non-metallic vessel.

Models are available with rigid rods, removable rods and pendular electrodesmade from 316SS. For applications with aggresive or sticky media or highertemperatures, the rods may be coated with Epoxy or Halar. The CN Series LevelSwitches are designed to work at temperatures of - 10° to 80° C and maximumpressures of up to 20 bar.

The probes work by the change in electrical resistance between the electrode andreference electrode or metal wall of the vessel. When the electrode comes intocontact with the conductive medium the electronics detects the change inresistance level actuating a relay output.The electrodes are powered up with alternating current. The use of alternatingcurrent avoids the corrosive result of electrolysis on the rods.

Technology:

www.sitron.com - email: [email protected]

Models

CN1 & CN2Fixed Rod

N1 Housing

CN1 & CN2Pendular Electrode

N1 Housing

CN1 & CN2Removable Rod

G1 Housing

CN1 & CN2Rigid Rod

G1 Housing

CN1 & CN2Pendular Electrode

G1 Housing

CN1 & CN2Removable Rod

N1 Housing

04

05

Dimensions

Mounting Options

Insertion Length

126m

m

89mm

76

mm

89mm 80mm

N1 - Nylon Aluminum - G1

L2

L1

3/4” BSP/ NPT

Hex.

6.3mm

53m

m

64mm

L1

6.3mm

48m

m

50.5mm

6.3mm

PVC cable 2,5mm

3/4” BSP/NPT

L1 to L3- Insertion Length

CN2- StandardFixed Rod

CN1-Sanitary

1 1/2” CN2-Sanitary

2”

CN2- cablePendular Electrode

PVC

L1

L2

L1

½” BSP/ NPT

Hex.

6.3mm

CN1- StandardFixed Rod

PVC Cable 2,5mm

L1

CN1- cablePendular Electrode

PVC

L1

L2

L1

½” BSP/NPT½” BSP/NPT

3/4” BSP/NPT

L

CN2Removable Rod

CN1Removable Rod

Threaded Connections

3/4”

1 ½”

1 ½”

1 ½”

2 ½”

2 ½”

1”

2”

2”

2”

3”

1”

1,75

Tri-Clamp Connection Flange Connections

Process Connections

TC Connection

ANSI 150#ANSI 300#

Rubber Seal

Process Connection

NPT BSPFF

RF


Electrical Connections

CN1 & CN2 - N1 Housing

Sens.Delay

50,1 0 5

1 2 3 4 5 6

CN1 & CN2 - G1 Housing

24V DC+ -

TimerSens.100 0

5 2,5

5

CN1 DCCN2 DC

5A 250V

Sensitivity adjustment and Time delay

Power Supply

LED Status

Relay Output

Power

LED Status

DC: 24Vdc +/- (10%)AC: 85...230Vac

Sensitivity adjustment and Time delay

N1

G1

1- Power Supply2- Power Supply3- Ground4- contact NC5- common6- contact NO

( )

( )

( )+

( )-

Before Powering the unit up, make sure that the PowerSupply is compatible with the voltage indicated on theindentification tag of the equipment

06

0507

Electrical Connections

Application

Differential level control min. and max.with CN2

Level control using metallic tankas referrence with CN1

Min.

Max.

Level control using a secondrod as referrence

Metal Referrence

Min.

Max.

Differential level control min. and max.using a third rod as referrence (CN2 RF)

Power

Green

Red

Condition

Normal

Detection

Power

Green

Red

Condition

Normal

Detection

CN1- When the probe is connected, the LED lights Green. When theconductive medium reaches the electrode, the relay operates and the LEDlights Red.

CN2- Control min. and max. levelWhen the conductive medium reaches the maximum level, the LED lightsRed, turning lights Green after the conductive medium detects the rod orelectrode.


08

Mounting Notes

When making connections between the CN, usereliability cables and make sure they aregrounded. Shielded cables prevent interferenceand changes in eletronic improving andprotecting against false detections.

Avoid radio frequency interference and possiblemalfunction. When possible, keep hand heldcommunication equipment away from the CNlevel switch.

Do not use in harsh or humid environments.Respect class protection, working temperatureand protect the same from rain and excessiveheat.

A stable Power Supply prevents equipmentmalfunction.

09

Installatoin

Fig. 1

Rod

Rod Referrence

The probes may be installed in tanks orcontainers made of various materialssuch as metal, plastic, concrete etc.. Fornon-metallic tanks make sure that theprobe has a reference rod. (Fig. 1)

The metallic tank can be used as areferrence. (Fig. 2)

Evaluate the type of product to bedetected in the process. The probesmay require coating to protect the rodagainst corrosive or aggressiveproducts or from false triggering of therelay due to moisture build-up along thelength of the rod from steam. (Fig.2)

Coated (PTFE ,Halar )

Rod 316 SS

Fig. 2Metallic tank ( referrence)

Conductive medium ( corrosive or agressive)

R

The threaded connection should bein contact with the metallic tank


10

Installation

500m

m

500mm

Fig. 1

Fig. 3

Fig. 4

ShieldFig. 2

Verify that the location the probe is to be mountedis clear from the stream of product. (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 is anyexcess of product it will easily slide off the probe.(Fig. 2)

When installing from the top of the tank confirmthat the tip of the probe has cleared the side of thevessel by 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)

11

Installation

Fig. 5

Fig. 7

Fig. 6

For probes with cable extensions, installation shouldbe from the top of the tank. It is also recommendedthat for these probes the process shouldn't have anyagitation as this can cause fluctuating readings ordamage to the probe. (Fig. 5)

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

Ensure that the conduit is facing downward to avoidwater from entering the housing. (Fig. 7)

The probe must be installed utilizing the type ofconnection provided, unless an approved adaptor isprovided

Verify that the operating pressure and temperatureof the process corresponds to the operatingparameters of the probe.


12

Handling

Care should be taken when handling and installingprobes with coated rods to avoid scratching them.Scratching the coating could interfere with theprobe performance.

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 coating of the probe. (Fig. 4 and 5)

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

Do not turn or handle by the housing. (Fig. 2)

When tightening the sensor, use only use the316S.S. hexagon fitting to achieve a seal, do nottwist with the body of the sensor. (Fig. 3)

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

Fig. 5

Fig. 4

Fig. 3

Fig. 2

Fig. 1

0513

Technical Specification

85...230Vac / 125Vcc

MODELS CN1 & CN1RF AC CN2 & CN2RF AC

85...230Vac / 125Vcc


Application Level Detection for Conductive Medium Level Detection for Conductive Medium

Electrical Connection Cable Gland ½” BSP, NPT or M12 connector

Work Temperature -10 to +80ºC

Max. Pressure 20 bar

Class Protection IP 65

Power Supply

Comsumption 2VA

Output Relay (SPDT) 5A-250Vac

Time Delay 0.1 to 5 sec.

Ajustment Sensibility: max 50K �

Housing Aluminum

Wetted Parts 316 SS

Process Connection 1/2” to 1 ½” BSP or NPT, Flange and Sanitary

Cable Gland ½” BSP, NPT or M12 connector

-10 to +80ºC

20 bar

IP 65

2VA

Relay (SPDT) 5A-250Vac

0.1 to 5 sec.

Sensibility: max 50K �

Aluminum

316 SS

3/4” to 1 ½” BSP or NPT, Flange and Sanitary

Sens.Delay

50,1 0 5

1 2 3 4 5 6

Power

G1


14



MODELS CN1 & CN1RF DC CN2 & CN2RF DC

Application Level Detection for Conductive Medium Level Detection for Conductive Medium





Power Supply 24Vdc (+/- 10%)

Comsumption 2VA




Housing Aluminum

Wetted Parts 316 SS



-10 to +80ºC

20 bar

IP 65

24Vdc (+/- 10%)

2VA


0.1 to 5 sec.


Aluminum

316 SS


Sens.Delay

50,1 0 5

1 2 3 4 5 6

Power

G1

15




Application Level Detection for Conductive Medium




Power Supply 24Vdc (+/- 10%)

Comsumption 2VA




Housing Nylon Fiberglass

Wetted Parts 316 SS


MODELS CN1 & CN1RF DC CN2 & CN2RF DC

24V DC24V DC+ -

TimerTimerSens.100 0

5 2,5

5

CN1 DCCN2 DCCN1 DCCN2 DC

5A 250V

N1


Level Detection for Conductive Medium

-10 to +80ºC

20 bar

IP 65

24Vdc (+/- 10%)

2VA


0.1 to 5 sec.


Nylon Fiberglass

316 SS



Trouble Shooting

‘

Check the sensibility

Fail Cause Soluction

Probe doesnot work

Probecontinuously

ON

LED of level indicationalways ON

Check the adjustmentof sensibility

LED of Power supplyindication does notturn on

Check the Power supply

LED of level indicationdoes not ON

Check cable resistance(max. must be 50k )Ω

Check the temperature ofliquid medium. If there ispresence of steam it isnecessary coat the rods

Check if there is build up onthe rod

16

Ordering Information

17

OPTIONS

NONEO

A

E

F

MT

L

NS

AT

CLAMP

SINGLE ELECTRODE IN APOLIPROPELENE ENCLOSURE

O’RING VITON OR TEFLON

MEDIUM TEMPERATURE - 50mm 316 SSNECK (80-120°C)

HIGHT TEMPERATURE - 100mm 316 SSNECK (80-150°C)

ADAPTOR

NIPPLE FOR NK25 (½”BSP)

SANITARY NIPPLE

INSERTION LENGTH

SPECIFYL

2 1/2”

3/4”

SIZE

NONE

½”

1”

1 ½”

2”

0

4

3

5

6

7

8

OTHER

4”

9

A

B

Q

3”

1 1/4”

M30(E)

X

FLANGE ANSI 150# CARBON STEEL PAINTED

FLANGE ANSI 150# 316 SS

METRIC THREAD

PROCESS CONNECTION TYPE

FLANGE ANSI 150# - PVC

SMS FEMALE

NPT

BSP

FLANGE ANSI 150# - 304 SS

B

D

E

F

M

K

NR

NK25

SMS MALE

TRI CLAMP

S

T

U

Y

XFEMALE DIN 316SS

OTHER SPECIFY

FIXED ROD 1/4” - 316 SS

NONE

TYPE OF ROD OR CABLE

REMOVABLE ROD 1/4” - 316 SSL

A

O

N

S

U

X

PVC CABLE

SILICON CABLE 2.5mm

OTHER

REFERENCE CABLE 5/32” - 316 SS

NYLON

PEEK ( up to 260° C)

EPOXY ( up to 120°C)

COATED HALLAR ( up to 150°C)

OTHER SPECIFY

NONE

COATING/ TUBING

S

E

H

N

P

X

HOUSING

N1

G1

SMALL NYLON

SMALL ALUMINUM

CABLE GLAND W/ 1/2" BSP

CABLE GLAND W/ 3/4" BSP (G1)

CABLE GLAND W/ 1/2" NPT

3/4" NPT (G1)

ELECTRICAL CONNECTION

½" BSP (N1 OR G1)

3/4" BSP (G1)

½" NPT (N1 OR G1)

1/2”NPT CABLE GLAND & 2m CABLE

2

3

5

6

7

8

9

1

C

Y

CLIMPED W/ 2m OF CABLE (EL - SC)

CABLE GLAND W/ M16 METAL (A1)

MODEL

CN1DC

CN

CN1DCRF

CN2DCRF

CN2DC

CN1AC

CN1ACRF

CN2AC

CN2ACRF


Terms & Conditions

18

Sitron's TERMS & CONDITIONS

Design:

Pricing:

Delivery and Freight:

Shipment Delays:

Partial Deliveries:

Cancellation:

Sitron reserves the right to make any alterations or changes necessary to improvethe Products, correct defects or to make the Products safer, without prior notice or consent byBuyer.

All stipulated amounts shall be in US dollars and all prices quoted are valid for thirty(30) days from date of offer, unless otherwise stated.

Safety and Instructions: The Buyer ensures that it and all its representatives and agents willobserve all safety and technical instructions in Sitron's operating manuals, catalogs or otherdirections or instructions (either written or verbal).

All goods are sold FOB point of shipment, Brasil. Transportation to thedestination is the Buyer's responsibility and Buyer alone shall bear the cost of freight, optionalor other shipping requirements, and or insurance. Sitron shall not be liable for loss or damageto the Products after said Products are delivered to or received by the shipper/carrier, and allrisk of damage or loss shall immediately pass to Buyer.Receiving, unloading and storing of Products will be the responsibility of the Buyer.Buyer also accepts that courier may choose to return Products to Sitron if any local taxes orduties are not paid by Buyer at point of delivery. Buyer must make any and all claims forcorrections or deductions within ten days of the delivery of the Products.

Sitron has no control over the length of time shipments may be held atcustoms, etc. For this reason, Sitron commits only to a "shipment date", not a "delivery date".Buyer shall not hold Sitron liable for claims resulting from delay in shipment except in caseswhere these terms are accepted in writing by Sitron. Acceptance of delivery of Products byBuyer shall constitute a waiver of all claims for delay.

While Sitron strives to deliver all orders on time and complete, Sitronreserves the right to make partial deliveries when necessary.Changes: Any changes initiated by the Buyer which affects the products specifications;quantities ordered; delivery schedule; method of shipment or packing; or delivery location,must be made in writing and signed by both parties.In this case, Sitron reserves the right to adjust the pricing and or delivery of the order, whichwill be agreed to by both parties before further work is performed on the order. Any suchrequests will be priced according to the scope of changes and the status of the current order.Customer must sign and return or acknowledge approval of drawings along with anyPurchase Order. If approval drawings are not returned with order, the delivery date may beheld or pushed back until Customer has acknowledged approval.

Any cancellation of the Contract by the Buyer shall be effective only if made inwriting and accepted, in writing by the Sitron. In such a case, Sitron is entitled to reasonablecancellation charges including but not limited to labor, material and other related expenses.

Terms & Conditions

19

Termination Fee Schedule:

Warranty:

Return Goods:

Confidential Information:

Errors:

Order entered but not released for manufacturing 10%Order in any stage of production 75%Order complete and ready for shipment 100%

Sitron warrants its product against manufacturing defects in material andworkmanship, when installed in applications approved by Sitron, for a period of one year fromthe date of original shipment, unless otherwise stated in writing by Sitron.Sitron is not responsible for damage to Sitron's Products or other equipment or productsbecause of improper installation or misapplication of the Products by Buyer. Installation orstartup of Sitron's equipment must be performed under the guidelines set forth in Sitron'sinstruction manuals, wiring diagrams, etc., or performed under the direct supervision ofSitron's field technicians or Sitron's authorized Sales Representatives, in order to be coveredby Sitron's warranty.Sitron shall be under no liability in respect to any defect from fair wear and tear, willful damage,negligence, abnormal working conditions, failure to follow Sitron's instructions (whetherwritten or verbal), misuse, modification or alteration or attempted repair of the Goods withoutSitron's approval.Sitron shall not be liable under the above warranty (or any other warranty, condition orguarantee) if the total price for the Products or the payment of Services rendered has not beenpaid by the due date for payment.The Buyer must make all tools, resources or personnel available to help Sitron to diagnose thedefect without any back charge. In absence of Buyer's cooperation in this regard, there shallbe no liability under the above Warranty.Sitron's liability under this warranty shall be limited to repair or replacement at Sitron's optionof such defective Products, FOB factory, upon proof of defect satisfactory to Sitron. Warrantydoes not include transport.

No goods may be returned without Sitron's permission and an RMA number.Sitron assumes no responsibility for return shipments made without permission. In issuingcredit for such shipments, Sitron reserves the right to charge a restocking fee dependent onSitron's ability to recondition and resell the returned equipment.Insurance: The responsibility for insuring the Goods after the risk in them has passed to theBuyer shall be that of the Buyer.

All drawings, specifications, and technical information providedby either Buyer or Sitron shall be treated as confidential and shall not be disclosed to anyoneother than those who require it as part of the fulfillment of the order. Buyer agrees that thedesigns and/or any other related material provided are and remain Sitron's exclusive propertyand that the Buyer acquires no right, title or interest to this intellectual property, whether inwhole or in part.

Sitron reserves the right to correct all typographical or clerical errors or omissions, inits prices or specifications.


Sitron - BrasilR. Baronesa de Itu, 83

São Paulo - SP - 01231-001T.: (5511) 3825-2111F.: (5511) 3825-2171 www.sitron.com

BRASIL: [email protected]

USA / Other Countries: [email protected]

Sitron - USA1800 Prime PlaceHauppauge, NY 11788PH: 516-935-8001FX: 800-516-1656

cn1 & cn2 - sitron.com · cn2 dc cn1 dc cn2 dc 5a 250v n1 cable gland ½” bsp, npt or m12...

Documents