Magnetrol STI Kotron Manuale utente

Level

Sensor

Kotron®Tip Sensitive

RF Level Sensor

Instruction Manual and Parts List

50-606 Kotron Tip Sensitive RF Level Sensor

Read this Manual Before Installing

This manual provides information on the Kotron

Tip-Sensitive RF Level Sensor. It is important that all

instructions are read carefully and followed in sequence.

Detailed instructions are included in the Installation

section of this manual.

Conventions Used in this Manual

Certain conventions are used in this manual to convey

specific types of information. General technical material,

support data, and safety information are presented in

narrative form. The following styles are used for notes,

cautions, and warnings.

Notes

Notes contain information that augments or clarifies

an operating step. Notes do not normally contain

actions. They follow the procedural steps to which

they refer.

Cautions

Cautions alert the technician to special conditions that

could injure personnel, damage equipment, or reduce

a component’s mechanical integrity. Cautions are also

used to alert the technician to unsafe practices or the

need for special protective equipment or specific

materials. In this manual, a caution box indicates a

potentially hazardous situation which, if not avoided,

may result in minor or moderate injury.

Safety Messages

Follow all standard industry procedures for servicing elec-

trical equipment when working with or around high

voltage. Always shut off the power supply before touch-

ing any components.

Low Voltage Directive

For use in Category II Installations. If equipment is used

in a manner not specified by the manufacturer, protection

provided by equipment may be impaired.

Notice of Copyright, and Limitations

Magnetrol reserves the right to make changes to the

product described in this manual at any time without

notice. Magnetrol makes no warranty with respect to the

accuracy of the information in this manual.

Warranty

All Magnetrol/STI electronic level and flow controls are

warranted free of defects in materials or workmanship for

one full year from the date of original factory shipment.

If returned within the warranty period; and, upon factory

inspection of the control, the cause of the claim is

determined to be covered under the warranty; then,

Magnetrol/STI will repair or replace the control at no cost

to the purchaser (or owner) other than transportation.

Magnetrol/STI shall not be liable for misapplication,

labor claims, direct or consequential damage or expense

arising from the installation or use of equipment. There

are no other warranties expressed or implied, except spe-

cial written warranties covering some Magnetrol/STI

products.

Quality Assurance

The quality assurance system in place at Magnetrol/STI

guarantees the highest level of quality throughout the

company. Magnetrol/STI is committed to providing

full customer satisfaction both in quality products and

quality service.

Magnetrol’s quality assurance system

is registered to ISO 9001 affirming its

commitment to known international

quality standards providing the

strongest assurance of product/service

quality available.

50-606 Kotron Tip Sensitive RF Level Sensor

Table of Contents

1.0 Installation

1.1 Unpacking ...........................................................1

1.2 Electrostatic Discharge (ESD) Handling Procedure...1

1.3 Preliminary Operational Check .............................1

1.4 Installation Location..............................................2

1.5 Probe Length.........................................................3

1.6 Mounting ..............................................................3

1.6.1 Horizontal Mounting .................................3

1.6.2 Vertical Mounting.......................................4

1.7 Installation Instructions.........................................4

1.8 Wiring ..................................................................4

1.8.1 Operating Mode Selection..........................5

1.9 Calibration ............................................................6

2.0 Reference Information .................................................8

2.1 Description ...........................................................8

2.2 Operating Principle ...............................................8

2.3 Troubleshooting.....................................................8

2.3.1 General Check............................................8

2.3.2 Switch Chatter............................................9

2.3.3 Relay Will Not Reset ..................................9

2.4 Agency Approvals ................................................10

2.5 Parts ....................................................................10

2.5.1 Replacement Parts ....................................10

2.6 Specifications.......................................................11

2.6.1 Electrical...................................................11

2.6.2 Dimensional Data.....................................12

3.0 Model Identification ..................................................12

Kotron Tip Sensitive

RF Level Sensor

50-606 Kotron Tip Sensitive RF Level Sensor

1.0 Installation

Kotron Tip Sensitive Level Controls can be utilized in

liquid or bulk material applications. There are no moving

parts in contact with the medium. These units are integral

systems with the sensing probe mounted with the electronics.

1.1 Unpacking

Unpack the instrument carefully. Make sure all compo-

nents have been removed from the packing material.

Inspect all components for damage. Report any concealed

damage to the carrier within 24 hours. Check the contents

against the packing slip and report any discrepancies to the

factory. Check the nameplate model number to be sure it

agrees with the packing slip and purchase order. Check

and record the serial number for future reference when

ordering parts.

1.2 Electrostatic Discharge (ESD)

Handling Procedure

Magnetrol’s electronic instruments are manufactured to the

highest quality standards. These instruments use electronic

components that may be damaged by static electricity

present in most work environments.

The following steps are recommended to reduce the risk

of component failure due to electrostatic discharge.

•Ship and store circuit boards in anti-static bags. If

an anti-static bag is not available, wrap the board in

aluminum foil.

•Do not place boards on foam packing materials.

•Use a grounding wrist strap when installing and removing

circuit boards. A grounded workstation is recommended.

•Handle printed circuit boards only by the edges.

Do not touch components or connector pins.

•Make sure that all electrical connections are completely

made and none are partial or floating. Ground all

equipment to a good, earth ground.

50-606 Kotron Tip Sensitive RF Level Sensor 2

1.3 Preliminary Operational Check

After unpacking and before installation, perform

the following operational check on the unit in a

non-hazardous area.

1. Fill a suitable grounded container with water.

2. In a non-hazardous area, power the unit with proper

voltage.

3. Dip the probe in the water. The relay should activate.

4. Withdraw the probe from the water. The relay should

deactivate.

1.4 Installation Location

Kotron RF Point Level Switches should be located for easy

access for service, calibration and monitoring. Switches

should not be exposed to ambient temperatures below

-40° F (-40° C) or above +160° F (+70° C). Special pre-

caution should be made to prevent exposure to corrosive

atmosphere, excessive vibration, shock or physical damage.

Sensing probes should be located close to the tank wall for

greatest sensitivity. Probes should be isolated from severe

motion in the tank, because surface turbulence may cause

signal deviation.

Caution: This unit contains CMOS electronics which may be dam-

aged by static electricity. Do not touch any semi-conduc-

tor devices unless you are properly grounded.

50-606 Kotron Tip Sensitive RF Level Sensor

1.5 Probe Length

If the geometry of your application requires a probe shorter

than 14" (356 mm), refer to the Probe Length vs.

Dielectric Constant chart below.

A minimum probe length of 4" (102 mm) is permissible

in a conductive liquid (dielectric of 24 or greater). The full

length should be maintained in a non-conductive liquid or

bulk material.

1.6 Mounting

Tip Sensitive Point Sensors are shipped assembled to the

probe. They may be installed in horizontally or vertically.

1.6.1 Horizontal Mounting

Unit will signal at probe level. Refer to Figures 1 and 2.

Caution: Do NOT horizontally mount the unit in a nozzle. Refer to

Figure 2. The medium may build up in the nozzle and

cause false actuation.

4 5 6 7 8 9 10 11 12 13 14

MINIMUM REQUIRED DIELECTRIC CONSTANT (EPSILON) OF MATERIAL

TOTAL PROBE LENGTH (Inches)

Figure 1

Incorrect horizontal mounting

Figure 2

Correct horizontal mounting

50-606 Kotron Tip Sensitive RF Level Sensor 4

1.6.2 Vertical Mounting

As medium rises on the probe, unit will signal at a point

determined by the calibration of the unit and the dielectric

constant of the medium. In conductive media, the actua-

tion point will be at the tip of the probe over a wide range

of zero calibrations. Refer to Figure 3.

1.7 Installation Instructions

1. Thread amplifier assembly into mounting bushing

on tank using suitable pipe compound or thread

tape. Assembly may also be bolted to a flange with

a suitable gasket.

2. Tighten securely, being certain that the wrench is applied

ONLY to the mounting nut. Refer to Figure 3.

1.8 Wiring

All power and control connections are made at the termi-

nal strip within the amplifier enclosure. 16 AWG wire is

recommended for power and control circuit.

Caution: Observe all local electrical codes and proper wiring

procedures.

1. Make sure the power source is turned off.

2. Unscrew and remove housing cover.

3. Pull power supply and control wires through

conduit connection.

4. Connect power leads to applicable AC or DC terminals as

marked. Refer to Figure 4.

5. Connect control circuit leads to relay terminals. Refer to

Figure 4. Make sure the load to be controlled is within the

relay’s rated capacity.

6. Dress wiring to guard against interference or contact with

cover or circuit board components.

7. Prevent moisture seepage into the housing by installing an

approved seal-drain fitting in the conduit run leading to

the unit.

8. Select operating mode. Refer to Section 1.8.1, Operating

Mode Selection on page 5 for detailed information. Make

sure that the operating mode jumper wire is in the correct

position for your selection. Refer to Figure 4.

Mounting nut

apply wrench here

Tank mounting

bushing

Actuation point in

conductive media

Figure 3

Vertical mounting

Operating

Mode

Jumper

Wire

Terminal Strip

AC Power

Supply

Connections

Control

Connections

DC Power

Supply

Connections

Zero

Adjustment

GND AC AC RELAY +24v LL CM HLGND

Figure 4

Terminal connections

50-606 Kotron Tip Sensitive RF Level Sensor

NOTE: This unit is factory supplied with the jumper wire connecting

LL and CM.

Caution: In hazardous areas, do not power the unit until the conduit

is sealed and enclosure cover is screwed down securely.

9. Installation is complete. Replace housing cover.

1.8.1 Operating Mode Selection

Low Level (LL) means tank material below the

set point

High Level (HL) means tanks material above the

set point

Loss of power: The relay contact will open in all

mode selections. Relay contact will

remain open until power is restored.

It will then assume a condition in

accordance with the selection table

below.

Caution: Connect terminal LL or HL, only to terminal CM. Any other

connection may damage the unit.

Line Material Operating Mode Jumper Wire

Power Level CM to LL CM to HL

On Below Set Point Contacts Closed Contacts Open

Above Set Point Contacts Open Contacts Closed

Fail Below Set Point Contacts Open Contacts Open

Above Set Point Contacts Open Contacts Open

50-606 Kotron Tip Sensitive RF Level Sensor 6

1.9 Calibration

Caution: For Hazardous Locations – Extra precautions must be

taken during instrument calibration. Before housing cover

is removed, power MUST be turned off.

1. Turn on power to the instrument.

2. Remove housing cover.

3. Set point locations:

Conductive media — The set point is located at the tip of

the probe. Calibration is not required for most conductive

liquids. If the unit does not switch on alarm test, then

proceed to Step 4.

Non-conductive media — The set point is located at the

probe at a point determined by the dielectric constant of

the medium. Refer to Figure 1 on page 2. Calibration is

required. Proceed to Step 4.

NOTE: An ohmmeter or other indicating device connected across the

relay terminals will indicate switch change with level change,

simplifying the calibration procedure.

4. Alarm adjustments:

High level alarm (refer to Section 1.8.1, Operating Mode

Selection for proper jumper wire connection).

a. With no material on probe, turn zero adjustment con-

trol fully counterclockwise 20 turns. Refer to Figure 4

on page 4.

b. Slowly turn clockwise until relay contact changes.

c. The unit is now calibrated. The relay contact will

change state when the material rises on the probe.

NOTE: The calibration adjustment is more critical in low dielectric

media than in high dielectric media. Care must be taken to

turn the zero adjustment control just enough to deactivate the

alarm. If it is adjusted even 1⁄4 turn beyond the set point, the

zero adjustment band will be out of the operational change.

Low level alarm (refer to Section 1.8.1, Operating Mode

Selection for proper jumper wire connection).

a. With material covering the probe, turn zero adjustment

control fully clockwise 20 turns. Refer to Figure 4 on

page 4.

b. Slowly turn counterclockwise until relay contact

changes.

c. The unit is now calibrated. The relay contact will

change state when the material falls below the probe.

50-606 Kotron Tip Sensitive RF Level Sensor

5. Replace housing cover.

6. Bring material to alarm condition and check for relay con-

tact change.

2.0 Reference Information

This section presents an overview of the operation of the

Kotron Tip Sensitive RF Level Sensor, information on

troubleshooting common problems, listings of agency

approvals, a list of replacement parts and electrical and

dimensional data.

2.1 Description

Kotron Tip Sensitive Level controls can be utilized in liquid

or bulk material applications. There are no moving parts in

contact with the medium. These units are integral systems

with the sensing probe mounted with the electronics.

2.2 Operating Principle

As the medium covers the sensing probe, the amount of

capacitance between the probe and tank wall increases.

This capacitance is measured by the electronics. When the

capacitance is the same as the setpoint, the relay changes

state. As the medium drains from the sensing probe, the

relay reverses.

2.3 Troubleshooting

Caution: In hazardous areas do not remove housing until power is

disconnected and atmosphere is determined to be safe.

2.3.1 General Check

1. Check power and control circuit wiring.

2. Check calibration.

3. Check jumper wire position.

4. Check length of probe against chart in Figure 1 on page 3.

5. Check ground system. Unit must be grounded to calibrate

properly. If mounted in non-metallic tank, run grounding

strap from mounting nut to earth ground.

NOTE: If remedies above are unsuccessful, consult factory.

Indice

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