Omega Products LTU-101 Installation Manual

NRTL/C

http://www.omega.com

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“

User’s Guide

LTU-101, LVU-150, LVC-152

LVC-100 & LVF-210 Series

Powered Level Switch

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

TEMPERATURE

䡺⻬

Thermocouple, RTD & Thermistor Probes,
Connectors, Panels & Assemblies

䡺⻬

Wire: Thermocouple, RTD & Thermistor

䡺⻬

Calibrators & Ice Point References

䡺⻬

Recorders, Controllers & Process Monitors

䡺⻬

Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

䡺⻬

Transducers & Strain Gauges

䡺⻬

Load Cells & Pressure Gauges

䡺⻬

Displacement Transducers

䡺⻬

Instrumentation & Accessories

FLOW/LEVEL

䡺⻬

Rotameters, Gas Mass Flowmeters & Flow Computers

䡺⻬

Air Velocity Indicators

䡺⻬

Turbine/Paddlewheel Systems

䡺⻬

Totalizers & Batch Controllers

pH/CONDUCTIVITY

䡺⻬

pH Electrodes, Testers & Accessories

䡺⻬

Benchtop/Laboratory Meters

䡺⻬

Controllers, Calibrators, Simulators & Pumps

䡺⻬

Industrial pH & Conductivity Equipment

DATA ACQUISITION

䡺⻬

Data Acquisition & Engineering Software

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Communications-Based Acquisition Systems

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Plug-in Cards for Apple, IBM & Compatibles

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Datalogging Systems

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Recorders, Printers & Plotters

HEATERS

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Heating Cable

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Cartridge & Strip Heaters

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Immersion & Band Heaters

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Flexible Heaters

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Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

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Metering & Control Instrumentation

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Refractometers

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Pumps & Tubing

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Air, Soil & Water Monitors

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Industrial Water & Wastewater Treatment

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pH, Conductivity & Dissolved Oxygen Instruments

M-3949/0403

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It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA

is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will

add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts no liability for any errors it

contains, and reserves the right to alter specifications without notice.

WARNING: These products are not designed for use in, and should not be used for, human applications.

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FOR WARRANTY RETURNS, please have the

following information available BEFORE contacting

OMEGA:

1. Purchase Order number under which the product

was PURCHASED,

2. Model and serial number of the product under

warranty, and

3. Repair instructions and/or specific problems

relative to the product.

FOR NON-WARRANTY REPAIRS,

consult

OMEGA for current repair charges. Have the fol-

lowing information available BEFORE contacting

OMEGA:

1. Purchase O rder number to cover the COST

of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible.

This affords our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.

© Copyright 2003 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photo-

copied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part,

without the prior written consent of OMEGA ENGINEERING, INC.

WARRANTY/ DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a peri-

od of 13 months from date of purchase. OMEGA’s Warranty adds an additional one (1) month grace period

to the normal one (1) year product warranty to cover handling and shipping time. This ensures that

OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service

Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon

examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge.

OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not

limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unautho-

rized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or

shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibra-

tion; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control.

Components which wear are not warranted, including but not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA

neither assumes responsibility for any omissions or errors nor assumes liability for any damages

that result from the use of its products in accordance with information provided by OMEGA,

either verbal or written. OMEGA warrants only that the parts manufactured by it will be as

specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS

OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED

WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of

purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this

order, whether based on contract, warranty, negligence, indemnification, strict liability or

otherwise, shall not exceed the purchase price of the component upon which liability is based. In

no event shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic

Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical

applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity,

medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth

in our basic WARRANTY/ DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and

hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in

such a manner.

RETURN REQUESTS / INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE

RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR)

NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING

DELAYS). The assigned AR number should then be marked on the outside of the return package and on

any correspondence. The purchaser is responsible for shipping charges, freight, insurance and proper packaging

to prevent breakage in transit.

USA

MAD

IN

I

P

68

Step One

SPECIFICATIONS

1,600
1,400
1,200
1,000

800
600
400
200

0

12 18 24 30 36

Acceptable

Range

Unacceptable

Range

4-20 mA Sensor

Electrical Loading Limits

Max. Series Resistance (Ohms)

Supply Voltage (VDC)

100

80

60

40

20

00

-20
12 16 20 24 28 32 36

Acceptable

Range

Unacceptable

Range

Maximum Tem. / Voltage Derating

Continuous 20 mA Sinking Curve

Ambient Sensor Temperature (¡C)

Operating Voltage (VDC)

Orientation:
Accuracy:
Repeatability:
Supply voltage:
Consumption:
Contact type:
Contact rating:

Contact output:
Process temp.:

Pressure:

Sensor rating:
Cable type:

Cable length:
Process mount:
Mount. gasket:
Classification:
CE compliance:

Universal

±

1 mm in water

±

0.5 mm in water
12-36 VDC
25 mA maximum
(1) SPST relay
GP: 120 VAC/VDC @ 1A
(CE: 60 VAC/VDC @ 1A)
Selectable NO/NC
F: -40˚ to 194˚
C: -40˚ to 90˚
150 psi (10 bar) @ 25˚
C., derated @ 1.667
psi (.113 bar) per ˚C.
above 25˚ C.
NEMA 6 (IP68)
4-conductor, #22 AWG
(shielded)
Standard: 10' (3m)
3/4" NPT (3/4" G / Rp)
Viton® (G version only)
General purpose
EN 50082-2 immunity
EN 55011 emission
EN 61010-1 safety

Sensor material:
Cable jacket mat.:

PP-Ryton® (glass fill)
PP

Sensor material:

Cable jacket mat.:

-150/-152: PP

-151/-153: PFA

-150/-152: PP

-151/-153: PFA

Dielectric range:
Conductive range:
Sensor material:
Cable jacket mat.:

> 20 constants
> 100 micromhos
PP
PP

Dielectric range:
Conductive range:
Sensor material:

Cable jacket mat.:

> 20 constants
> 100 micromhos

-101/-103: PP

-102/-104: PFA

-101/-103: PP

-102/-104: PFA

Sensor material:

Cable jacket mat.:

-210/-212: PP

-211/-213: PFA

-210/-212: PP

-211/-213: PFA

Common Specifications:

LVC-152 series Specifications:

LTU-101 series Specifications:

LVU-150 series Specifications:

LVF-210 series Specifications:

LVC-100 series Specifications:

160
140
120
100

80
60
40
20
00

-40 -20 00 20 40 60 80 100

Acceptable

Range

Unacceptable

Range

Pressure / Temperature Derating

Operating Pressure (psi)

Temperature (¡C)

Acetone 21
Acetoaldehyde 22.2
Acetyl methyl hexyl

ketone 28
Alcohol 16 to 31
Ammonia 15 to 25
Acetic acid 4.1 to 6.2
Butyl chloride 9.6
Barium chloride 9 to 11
Benzene 2.3
Benzine 2.3
Barium nitrate 5.6
Bromine 3.1
Chlorobenzene 4.7 to 6

Chlorotoluene 4.7
Chloroform 4.5 to 5.0
Chlorine, liquid 2.0
Carbon tetrachloride 2.2
Cyan 2.6
Cyclohexane methanol

3.7
D.I. Water 20
Ethyl toluene 2.2
Ethyl alcohol 23
Ethylene glycol 37
Ethylene oxide 14
Ethylene dichloride

11 to 17

Ethylene chloride 10.5
Ethyl acetate 6.4
Ethyl salicylate 8.6
Ethyl stearate 2.9
Ethyl silicote 4.1
Formic acid 59
Ferric oleate 2.6
Freon 2.2
Glycerine 47
Glycol 30
Glycol nitrite 27
Gasoline 2 to 2.2
Hydrochloric acid 4.6
Isobutyric acid 2.7

Isobutyl methyl ketone

13
Jet fuel 1.7
Lead carbonate 18
Lead nitrate 38
Methyl salicylate 9.0
Methanol 33
Methyl alcohol 33 to 38
Margarine, liquid

2.8 to 3.2

Methyl acetate 7.3
N-butyl formate 2.4
Nitrobenzene 26 to 35

Nitrotoluene 25
Naphthalene 2.3 to 2.5
Oils, vegetable 2.5 to 3.5
Oils, mineral 2.3 to 2.4
Oils, petroleum

1.8 to 2.2
Oleic acid 2.5
Propane, liquid

1.8 to 1.9
Potassium nitrate

5.0 to 5.9
Potassium chloride 5.0
Stearic acid 2.3
Toluene 2.4

Trichloroethylene 3.4
Trichloroacetic acid 4.5
Terephthalic acid

1.5 to 1.7
Thinner 3.7
Urea 3.5
Vinyl chloride 2.8 to 6
Vinyl alcohol 1.8 to 2.0
Water, 20°C 80
Water, 100°C 48

Table of Common Dielectric Constants

NOTE: Liquids with a dielectric constant less than 20 will not be detected by an LVC-152 series or LVC-100 series level switch, as
factory calibrated.

Step Two

DIMENSIONS

Optic Leak Detection Switch, LVF-210 series

Intrusive RF Capacitance Level Switch, LVC-100 series

SuperGuard RF Capacitance Level Switch, LVC-152 series

Ultrasonic Level Switch, LVU-150 series

Vibration Level Switch, LTU-101 series

* all dimensions are Nominal

10’ Cable (3m)

4.7"

(120mm)

3/4" NPT (3/4" G)3/4" NPT (3/4" Rp)

3.0"(76mm)

3/4" NPT (3/4" G)3/4" NPT (3/4" Rp)

2.3"(57mm)

0.7"

(18mm)

3/4" NPT (3/4" Rp)3/4" NPT (3/4" Rp)

0.7"

(19mm)

10’ Cable (3m)

2.1"(54mm)

2.8"(71mm)

4.5"(114mm)

3/4" NPT (3/4" G)3/4" NPT (3/4" Rp)

10’ Cable (3m)

2.6"(67mm)

3.3"(83mm)

5.0"(127mm)

3/4" NPT (3/4" G)3/4" NPT (3/4" Rp)

0.7"

(19mm)

10’ Cable (3m)

4.5"(114mm)

2.1"(54mm)

2.8"(70mm)

0.7"

(19mm)

10’ Cable (3m)

10’ Cable (3m)

3.0"(76mm)

3.0"(76mm)

0.7"

(19mm)

1.3"(32mm)

3/4" NPT (3/4" Rp)3/4" NPT (3/4" Rp)

0.7"

(19mm)

1.3"(32mm)

0.7"

(19mm)

0.7"

(19mm)

3/4" NPT (3/4" G)3/4" NPT (3/4" Rp)

10’ Cable (3m)

4.5"(114mm)

2.1"(54mm)

2.8"(71mm)

0.7"

(19mm)

10’ Cable (3m)

3.0"(76mm)

3/4" NPT (3/4" Rp)3/4" NPT (3/4" Rp)

0.7"

(19mm)

1.3"(32mm)

0.7"

(19mm)

Step Three Step Four

SAFETY PRECAUTIONS INTRODUCTION

About this Manual:

PLEASE READ THE ENTIRE MANUAL PRIOR TO
INSTALLING OR USING THIS PRODUCT. This manual
includes information on all models of Omega’s powered level
switches: LTU-101 series, LVU-150 series, LVC-152 series, LVC­100 series and LVF-210 series. Please refer to the part number
located on the switch label to verify the exact model which you
have purchased.

User’s Responsibility for Safety:

Omega manufactures a wide range of liquid level sensors and tech­nologies. While each of these sensors is designed to operate in a
wide variety of applications, it is the user’s responsibility to select
a sensor model that is appropriate for the application, install it
properly, perform tests of the installed system, and maintain all
components. The failure to do so could result in property damage
or serious injury.

Proper Installation and Handling:

Because this is an electrically operated device, only properly­trained staff should install and/or repair this product. Use a proper
sealant with all installations. Never overtighten the sensor within
the fitting, beyond a maximum of 80 inch-pounds torque. Always
check for leaks prior to system start-up.

Material Compatibility:

The LVU-150, LVC-100 and LVF-210 series sensors are available
in two different wetted materials. Models LVU-150/-152, LVC­101/-103 and LVF-210/-212 are made of Polypropylene(PP).
Models LVU-151/-153, LVC-102/-104 and LVF-211/-213 are
made of Perfluoroalkoxy(PFA), also known by the trade name
Teflon. The LTU-101 series is made of PP with the forks made of
Ryton (40% glass filled) and the LVC-152 series is made of PP.
Make sure that the model you have selected is compatible with the
application liquid. To determine the chemical compatibility
between the sensor and its application liquids, refer to an industry
reference.

Wiring and Electrical:

The supply voltage used to power the sensor should never exceed
a maximum of 36 volts DC. Electrical wiring of the sensor should
be performed in accordance with all applicable national, state, and
local codes.

Flammable, Explosive and Hazardous Applications:

DO NOT USE THE LTU-101, LVU-150, LVC-152, LVC-100 OR
LVF-210 SERIES GENERAL PURPOSE SWITCH IN HAZ­ARDOUS LOCATIONS.

WARNING

The rating for the relay is 120 VAC/60 VDC @ 1A. For CE
rated applications, the relay rating is 60 VAC/60 VDC @ 1A.

Omega’s powered level switches are not recommended for use
with electrically charged application liquids. For most reliable
operation, the liquid being measured may need to be electrical­ly grounded.

Vibration Switch:

The Tuning Fork vibration switch operates at a nominal frequency of
400 Hz. As the switch becomes immersed in a liquid or slurry, a cor­responding frequency shift occurs. When the measured frequency
shift reaches the set point value, the switch changes state indicating
the presence of a liquid or slurry medium.

Do not squeeze the forks together. Doing so could damage or
break the sensor and void the warranty.

When powering up the LTU-101 series, the start-up procedure
requires the switch to cycle through a wet condition for 1/2 second in
order to determine an initial resonance.

Ultrasonic Switch:

The Ultrasonic level switch generates a 1.5 MHz ultrasonic wave
from a miniature piezoelectric transducer located on one side of the
gap in its sensing tip. Another piezo transducer located on the other
side of the gap acts as a microphone, picking up the sound. When liq­uid enters the gap in the sensing tip, the audio level changes.

The sensor should be installed so that the liquid will drip out of
the gap when the sensor becomes dry.

Optic Switch:

The Optic Leak Detector use principles of optical refraction to detect
the presence or absence of fluid. Apulsed infrared light beam is inter­nally generated by a light emitting diode and aimed at the slanted
optical tip of the sensor. If the tip is dry, the light beam bounces at a
90 degree angle to a receiving photo transistor, indicating a dry con­dition. If the tip is immersed in liquid, the light beam will refract out
into the liquid instead of being reflected to the photo transistor, indi­cating a wet condition.

The Optic Leak Detector can not detect the presence or
absence of specular application liquids that reflect light (such
as milk), or viscous liquids (such as paint) that form a coating
on the sensor tip.

SuperGuard Capacitance Switch:

The SuperGuard level switch generates a pulse-wave radio frequency
signal from the capacitance electrode located in the sensing tip of
each sensor. When liquid comes into contact with the sensing tip, the
capacitance as measured by the sensor changes based on the dielec­tric constant of the liquid. The guard circuit rejects the negative
effects of coating buildup on the probe by eliminating the coating sig­nal path between the active and reference electrodes.

Intrusive RF Capacitance Switch:

The Intrusive RF Capacitance level switch generates a 300 kHz pulse­wave radio frequency signal from the capacitance electrode located in
the sensing tip of each sensor. When liquid comes into contact with
the sensing tip, the capacitance as measured by the sensor changes
based on the dielectric constant of the liquid.

The sensor’s operation may vary based on the dielectric prop­erties of various application liquids. The LVC-152 series &
LVC-100 series sensor is factory-calibrated to be used with liq­uids with a dielectric value between 20 and 80.

Liquids with a dielectric constant less than 20 will not
be detected by an LVC-152 series & LVC-100 series sen­sor, as factory calibrated.

Step Five Step Six

INSTALLATION ELECTRICAL

Through Wall Installation:

Omega’s powered level switches may be installed through the top,
side or bottom of a tank wall. The sensor has male 3/4" NPT threads
on either side of a 15/16" wrench flat. This enables the user to select
the sensor’s mounting orientation, installed outside of the tank in, or
inside of the tank out.

Supply Voltage:

The supply voltage to the powered level switch should never exceed
a maximum of 36 VDC. Omega controllers have a built-in 13.5 VDC
power supply which provides power to all of Omega’s electrically
powered sensors. Alternative controllers and power supplies, with a
minimum output of 12 VDC up to a maximum output of 36 VDC,
may also be used with the powered level switch.

Required Cable Length:

Determine the length of cable required between the powered level
switch and its point of termination. Allow enough slack to ensure the
easy installation, removal and/or maintenance of the sensor. The
cable length may be extended up to a maximum of 1000 feet, using a
well-insulated, 14 to 20 gauge shielded four conductor cable.

Wire Stripping:

Using a 10 gauge wire stripper, carefully remove the outer layer of
insulation from the last 1-1/4" of the sensor's cable. Unwrap and dis­card the exposed foil shield from around the signal wires, leaving the
drain wire attached if desired. With a 20 gauge wire stripper, remove
the last 1/4" of the colored insulation from the signal wires.

Signal Outputs (Current sensing):

The standard method used by Omega controllers; this technology uses
only two wires (Red and Black). The sensor draws 5 mAwhen it is dry,
and 19 mA when wet. NC/NO status must be set by the controller. The
White and Green wires are not used.

Multi-Point Installation:

Omega’s LVM-10 series mounting system is an in-tank fitting which
enables users to install up to four OMEGAsensors of any technology,
to any depth, along the entire length of track. LVM-10 series may be
installed through the top wall of any tank using a standard 2" NPT
tank adapter. If no tank top installation is available, Omega's side
mount bracket, LVM-30, enables LVM-10 series to be installed
directly to the side wall of a tank.

Single-Point Installation:

Omega’s LVM-50 series mounting system is an in-tank fitting which
enables users to install one OMEGA sensor, of any technology, to a
specific depth. The Omega sensor may be installed onto the 3/4" NPT
adapter at the end of the LVM-50 series. LVM-50 series may be
installed through the top wall of any tank using a standard 2" NPT
tank adapter. Omega's side mount bracket, model LVM-30, may also
be used if top wall installation is not available.

Signal Output (Relay switching):

Allows the sensor to switch a small load on or off directly, using an
internal 1A relay (60 VAC/60 VDC). Omega’ s powered level switch­es features 4 wires (red, black, white and green) and a shield wire. The
NO/NC status is set by the polarity of the voltage feeding the red and
black wires. The green wire is the common for the relay and the white
wire is the NO or NC, depending on the polarity of red and black.

High Level Sensor

LVM-50

Series

Junction

Box

Low Level Sensor

2"

Coupling

LVM-10

Series

Red

Black

Shield

Ground

24 VDC

Power Supply

+

-

Multimeter

(Continuity)

-

+

White

Green

Red

Black

Shield

Ground

24 VDC

Power Supply

+

-

Multimeter

(mA)

-

+

Normally Open Wiring:

Normally Open Wiring:

Black

Red

Shield

Ground

24 VDC

Power Supply

+

-

White

Green

Multimeter

(Continuity)

-

+

Step Seven Step Eight

WIRING WIRING

Wiring to a Omega Controller:

LVCN-110 Series Controller

(4 or 20 mA signal output)

LCVN-120/-130/-140 Series Controller

(4 or 20 mA signal output)

(+)

(-)

INVERT +/-

INPUT

1

DELAY

AC

AC

GND

NC

C

NO

R

P

115 VAC
220 VAC

Shld - Not Used

Red

Green* - Not Used

White - Not Used

Black

+

RELAY 1

RELAY 2

POWER INVERT INVERT DELAY

--

+

--

DELAY

ONOFF

LATCH

INPUT1

INPUT2A

INPUT2B

Shld

Not Used - White

Red
Black

Not Used - Green*

[Dry Condition]

Sensor

(NO)

RED
GRN
SHLD
WHT
BLK

LOAD

LOAD

OR

[+]

[-]

[Dry Condition]

Sensor

(NC)

BLK
GRN
SHLD
WHT
RED

LOAD

LOAD

OR

[+]

[-]

[Dry Condition]

Sensor

(NO)

RED
GRN
SHLD
WHT
BLK

LOAD

[AC Power]

[+]

[-]

[Dry Condition]

Sensor

(NC)

BLK
GRN
SHLD
WHT
RED

LOAD

[AC Power]

[+]

[-]

Wiring the Relay Output:

The relay output can be wired as a dry contact to a VDC or VAC
power source. Powered level switch does require 12 - 36 VDC power
to operate the sensor and switch the relay. All illustrations below
identify a Dry switch state as the normal position of the relay.

Switching a Normally Open DC Load:

The Red wire connects to Positive (+) of the power supply and the
Black wire connects to Negative (-). The LOAD can be attached to
either the Green or White wires. Complete the circuit by either con­necting the Green to (+) VDC power or White to (-) VDC power (see
illustration below).

Switching a Normally Closed DC Load:

The Black wire connects to Positive (+) of the power supply and the
Red wire connects to Negative (-). The LOAD can be attached to
either the Green or White wires. Complete the circuit by either con­necting the Green to (+) VDC power or White to (-) VDC power (see
illustration below).

Switching a Normally Open AC Load:

The Red wire connects to Positive (+) of the DC power supply and the
Black wire connects to Negative (-). The LOAD can be attached to
the Green wire and the Hot of the VAC power. Connect the White to
the Neutral of the VAC power (see illustration below).

Switching a Normally Closed AC Load:

The Black wire connects to Positive (+) of the DC power supply and
the Red wire connects to Negative (-). The LOAD can be attached to
the Green wire and the Hot of the VAC power. Connect the White to
the Neutral of the VAC power (see illustration below).

Step Ten

MAINTENANCE

General:

The powered level switch requires no periodic maintenance except
cleaning as required. It is the responsibility of the user to determine
the appropriate maintenance schedule, based on the specific charac­teristics of the application liquids.

Cleaning Procedure:

1. Power: Make Sure that all power to the sensor, controller and/or

power supply is completely disconnected.

2. Sensor Removal: In all through-wall installations, make sure

that the tank is drained well below the sensor prior to removal.
Carefully, remove the sensor from the installation.

3. Cleaning the Sensor: Use a soft bristle brush and mild deter-

gent, carefully wash the powered level switch. Do not use harsh
abrasives such as steel wool or sandpaper, which might damage
the surface sensor. Do not use incompatible solvents which may
damage the sensor's PP, PFA, PVDF or Ryton plastic body.

4. Sensor Installation: Follow the appropriate steps of installa-

tion as outlined in the installation section of this manual.

Testing the installation:

1. Power: Turn on power to the controller and/or power supply.

2. Immersing the switch: Immerse the sensing tip in its applica-

tion liquid, by filling the tank up to the switches point of actua­tion. An alternate method of immersing the switch during prelim­inary testing is to hold a cup filled with application liquid up to
the switch's tip.

3. Test: With the switch being fluctuated between wet and dry

states, the switch indicator light in the controller should turn on
and off. If the controller doesn't have an input indicator, use a volt­meter or ammeter to ensure that the switch produces the correct
signal.

4. Point of actuation: Observe the point at which the rising or

falling fluid level causes the switch to change state, and adjust the
installation of the switch if necessary.

Step Nine

WIRING

Wiring as a P-Channel or N-Channel output:

The powered level switch can be substituted for either a P-Channel
(PNP, sourcing) output or a N-Channel (NPN, sinking) output.

Normally Open DC Load as a P-Channel Output:

To wire as a NO P-Channel output, follow the directions below. The
Red wire connects to Positive (+) of the power supply and the Black
wire connects to Negative (-). The Green wire is jumpered to the Red
wire while the White wire is connected to the LOAD. Jumper the
LOAD back to the Negative (-) to complete the circuit.

[Dry Condition]

Sensor

(NO)

RED
GRN
SHLD
WHT
BLK

LOAD

[+]

[-]

[Dry Condition]

Sensor

(NC)

BLK
GRN
SHLD
WHT
RED

LOAD

[+]

[-]

[Dry Condition]

Sensor

(NO)

RED
GRN
SHLD
WHT
BLK

LOAD

[+]

[-]

[Dry Condition]

Sensor

(NC)

BLK
GRN
SHLD
WHT
RED

LOAD

[+]

[-]

Normally Closed DC Load as a N-Channel Output:

To wire as a NC N-Channel output, follow the directions below. The
Black wire connects to Positive (+) of the power supply and the Red
wire connects to Negative (-). The White wire is jumpered to the Red
wire while the White wire is connected to the LOAD. Jumper the
LOAD back to the Positive (+) to complete the circuit.

Normally Open DC Load as a N-Channel Output:

To wire as a NO N-Channel output, follow the directions below. The
Red wire connects to Positive (+) of the power supply and the Black
wire connects to Negative (-). The White wire is jumpered to the
Black wire while the Green wire is connected to the LOAD. Jumper
the LOAD back to the Positive (+) to complete the circuit.

Normally Closed DC Load as a P-Channel Output:

To wire as a NC P-Channel output, follow the directions below. The
Black wire connects to Positive (+) of the power supply and the Red
wire connects to Negative (-). The Green wire is jumpered to the
Black wire while the White wire is connected to the LOAD. Jumper
the LOAD back to the Negative (-) to complete the circuit.