Technology based. Customer driven.

July 1998

Instruction ManualInstruction Manual

PL-548

33455480Rev 1.0

Pointek CLS 100Capacitance Liquids/Solids

hank you for purchasing Milltronics� products. We endeavour to design

equipment that is simple to use and reliable in its operation, with the aim

of satisfying our customers' needs.

Milltronics has been designing and manufacturing process equipment since

1954. Our fields of expertise include ultrasonic and capacitance level

measurement, in-line weighing of dry bulk solids and motion sensing.

Milltronics is established world wide through associate offices and

representatives. Our network is continually being refined to provide our

customers with first rate sales information, engineering assistance and after

sales support.

For more details on our products and service, please contact us and we will

provide you with a listing of the offices or representatives nearest you.

T

ABOUT POINTEK CLS 100

Pointek CLS 100 is to be used only in the manner outlined in this instruction manual.

The Pointek CLS 100 capacitance level switch provides 4 to 20 mA output and solid stateswitch contact for detection of high and low process material levels. When the measuredmaterial approaches or contacts the switch’s probe, an increase in capacitance is sensed anda high level alarm can be triggered. If a low level alarm is required then the lack of materialcontact is sensed and this condition triggers the low level alarm.

Pointek CLS 100 Features

✓ NPT, BSPT process connections

✓ Corrosion resistant construction, Kynar® and 316 stainless steel wetted parts✓ Non-polarized, solid-state switch✓ 4 or 20 and 20 or 4 loop alarm output

Pointek CLS 100 Applications

✓ Liquids, slurries, powders, granules, and solids✓ Foods and pharmaceuticals✓ Chemical and petrochemical✓ High pressure and temperature✓ Hazardous areas

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SPECIFICATIONS

Electrical/Instrument

» power: » standard: » 10 - 33 V dc» intrinsically safe: » 10 - 30 V dc

» alarm output: » mA: » 4 / 20 mA loop

» solid state switch: » standard: » 250 V ac / 300 V dc, 100 mA max

» 2 Watt

» intrinsically safe: » 25 V ac / 30 V dc

» repeatability: » 2 mm (0.08")

» mode: » high or low

Mechanical

» construction: » probe / wetted, 316 stainless steel process connection and Kynar® sensor

» body / housing, 316 stainless steel

» process connection, 3/4" NPT or 1" BSPT

» cable/ connection: » 1 m (3.3 ft) of 4 conductor, 22 AWG, shielded, polyester jacket

Environmental

» location: » indoor / outdoor

» altitude: » 2000 m max

» ambient temperature: » -40 to 85 °C (-40 to 185 °F)

» ingress protection: » Type 4X / NEMA 4X / IP65)

» installation category: » II

» pollution degree: » 4

Process

» dielectric constant (εr) » 1.5 min

» temperature » – 40 to 110 °C (–40 to 230 °F)

» pressure (vessel) » 0 absolute to 1000 kPa (10 bar or 146 psi) gauge, nominal

Approvals

» CSA, FM, CENELEC, KEMA, refer to device nameplate

® Kynar is a registered trade mark of ELF Atochem

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INSTALLATION

LOCATION

Installation shall only be performed by qualified personnel and in accordance with local governing regulations.

This product is susceptible to electrostatic shock.Follow proper grounding procedures.

The Pointek CLS 100 is normally mounted into the vessel top (high detection alarm) orthrough the tank wall at the detection level (high or low detection alarm).

verticalangle horizontal

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OUTLINE AND DIMENSION

∇ black » dust ignition proof and general purpose blue » intrinsically safe

cablerelief

green LED/ power

45 mm(11.5")

yellow LED/ sensor status

trimpot /sensitivity

ground post

red LED/ outputstatus

trimpot cap

cable Ø5 mm (0.2")∇

120 mm (4.7")

processconnection

36 mm(1.4")

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MOUNTING

DO’S AND DONT’S

STANDPIPES

MULTIPLE UNITS

> 100 mm (4") Ø

< 50 mm (2")

100 mm(4") min

100 mm(4") min

Sensors must be 100 mm apart. Mount diagonally if there isnot enough vertical space.

100 mm(4") min

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DO’S and DONT’S (cont’d)

WALL RESTRICTION

50 mm(2")min

50 mm(2")min

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DO’S and DONT’S (cont’d)

PROCESS CONCERNS

protect probe from falling material

consider material angle of repose

avoid areas where material build up occurs

keep out of path of falling material

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CLS 100 TERMINATION

solid state switch, normally open unpowered

V supply / mA loop modulator (4 or 20 mA)

ALARM OUTPUT STATUS

Definitions

Alarm Conditions as defined below can be detected in a fail-safe or non fail-safe mode.

Fail Safe » The sensor connection arrangement of the CLS 100 is fail-safe if the output status is in, or switches to the alarm status when power fails, which is an open contact state.

High Alarm » Condition in which the material has reached a maximum level for the users process (probe covered).

Low Alarm » Condition in which the material has reached a minimum level for the users process (probe uncovered).

Alarm Status CoveredYellow LED ON

UncoveredYellow LED OFF

Power Connection

High (fail safe) Red LED OFF4mA

SSS = open

Red LED ON20 mA

SSS = closed

Black wire + V

High (non fail safe) Red LED ON20 mA

SSS = closed

Red LED OFF4mA

SSS = open

Red wire + V

Low (fail safe) Red LED ON20 mA

SSS = closed

Red LED OFF4 mA

SSS = open

Red wire + V

Low (non fail safe) Red LED OFF4mA

SSS = open

Red LED ON20mA

SSS = closed

Black wire + V

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POWER / ALARM MODE

Standard Version - Non Intrisically Safe

LOW Alarm

HIGH Alarm

4 / 20 mA LOOP ALARM

SOLID STATE SWITCH

STANDARD VERSION - Non Intrisically Safe

When driving an external relay with either the solid state switch outputs using dc Power, a protection diode must be connectedin the correct polarity to prevent

possible switch damage due to inductive spikes generated by the relay coil.

+10 - 33 V dc

–

polarity as required fordesired operation

V supply10 - 33 V dc

See Power / Alarm Mode for polarity considerations.

Rmax = V supply – 10 V 20 mA

Rmax

–10 - 33 V dc

+

polarity as required fordesired operation

solid state switch,250 V ac / 300 V dc,100 mA maxsee CLS Termination

10 - 33 V dc

see Power / Alarm Mode for Vsupply polarity configuration

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OPERATION

SET UP

Set up can be done in the field with the Pointek CLS mounted into process, or in the shop prior to mounting.

START UP

After the CLS is properly mounted and wired, apply power to the unit. The green LED lights toindicate the unit is powered and operational.

INDICATORS

The Pointek CLS uses three LEDs for visual indication of the following:

yellow, sensor status: when the trim pot is properly set, this LED is on when the sensor is in contact with the process material (material capacitance is greater than the setpoint). It is offwhen the sensor is out of contact with the process material (material capacitance is less than the setpoint).

red, output status: this LED is an indication of the mA loop alarm and solidstate switch contact status. Refer to CLS Termination \ Alarm Output Status.

green, power: this LED is on when the Pointek CLS is properly powered.

Proceed with the set up of the alarm output.

ALARM OUTPUT

SETPOINT ADJUSTMENT

In order to assist you in properly adjusting the alarm setpoint for reliable and accuratedetection of the process material, we have categorized the materials and applications intothree cases. Follow the setup procedure associated to the case which covers your application.

Case 1: this is the general case encountered in most applications, characterized by the following:

- dry solids- low viscosity liquids

Case 2: demand applications, characterized by the following:- hygroscopic / wet solids - high viscosity and high conductivity liquids

Case 3: interface detection: - e.g. liquid A / liquid B, foam / liquid

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Case 1

Preamble: - insure that the green LED is ‘on ’- if the yellow LED is ’on’, turn the trimpot ccw (counterclockwise) until the yellow LED goes ‘off’, otherwise go to step 1 below.

1. With sensor uncovered and a minimum 100 mm free space all around, turn the trimpot cw until the yellow LED just goes ‘on ’.

2. Turn the trimpot ccw until the yellow LED just goes ‘off ’.

Case 2

Preamble: - insure that the green LED is ‘on ’- turn the trimpot ccw (counterclockwise), until the yellow LED just goes ‘off’.

1. Adjust the material level of the process so that the sensor is immersed, the yellow LED should be ‘on ’.

2. Adjust the material level of the process so that the sensor is uncovered, but retainssignificant (as much as possible) build up of material on the sensor.

3. Adjust the trimpot ccw until the yellow LED goes ‘off ’. To get the true feel of the correct position, it is wise to adjust the trimpot cw then ccw a couple of times to insure that the yellow LED is just ‘off ’.

Case 3

Preamble: - insure that the green LED is ‘on ’- turn the trimpot ccw (counterclockwise), until the yellow LED just goes ‘off’.

1. Immerse the sensor in the material that has the lowest dielectric constant.The yellow LED should be ‘on ’.

2. Adjust the trimpot ccw until the yellow LED goes ‘off ’.

3. Immerse the sensor in the material that has the highest dielectric constant, the yellow LED should come ‘on ’.

After completing the set up, replace the trimpot cap. The unit is now in service, providing level detection of your process.

20 turn trimpot

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TROUBLESHOOTING

MAINTENANCE

The Pointek CLS requires no maintenance or cleaning.

■

Symptom Observation Action

No switching action whensensor covered / uncovered

green LED OFF check power connectionsand voltage

green LED ONyellow LED continuously ON

Reduce the sensitivity byturning the trimpot CCW

green LED ONyellow LED continuously OFF

Increase the sensitivity byturning the trimpot CW

No switching action whensensor covered /

uncovered previous checks not effective

green LED is ONyellow LED doesn’t change

state as in 2 & 3 above

Possible failed sensor -check with supplier

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