Omega TRCN443 User manual

TRCN443
Low Turbidity Analyzer
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Instruction Manual
TRCN443
Index
Low Turbidity Meter
Specifications..................................................3
MachanicalDescription ..........................................4
TurbidityMeasurementPrinciple ...................................5
Dimensional...................................................7
EquipmentInstallation ...........................................8
InterconnectionBarr.............................................9
ElectricalSchematic............................................10
Lens&BubbleTrapCleaning.....................................11
CalibrationInformation .........................................13
TurbidityStandards.............................................14
EquipmentOperation...........................................15
EquipmentOperation-TurningOn.................................16
EquipmentOpeartion-SetUp....................................17
EquipmentOperation-Calibration.................................21
EquipmentOpearation-Read....................................22
CommunicationProtocol ........................................23

APPLICATION Analyzer / Transmiter / Turbidity Controller
ANALYZER
Display Alphanumeric 2 lines x 16 characters
Range 0.0001 to 10 NTU
Resolution 0.0001 (0.0001 thru 5NTU) / 0.001 (5.001 thru 10NTU)
Relative Precision 0.01% (full scale)
Analytical Method Nephelometric
Wavelength 660 nm
GENERAL
Enclosure IP-68
Body Material Cast Aluminum SAE 323(BASE)
ABS (Frontal Lid)
Electrical Connection Terminal Barr
Cable Inlet Cale Knockout 3/8” BSP (4)
Installation Flat Surface
Relative Humidity 20 to 80 %
Electrical Power 90 to 240 VAC (50/60 Hz)
Power Consumption 3.5 VA
Sample Flow 250 to 750 ml/min
Sample Pressure
(Min./max.)
10 / 20 psi
Sample Temperature 5 to 40°C
Weight 5 Kg (equipment and bubble trapper)
TRANSMITER
Analogic Output 2x 4 to 20 mA
Digital Output RS-485
CONTROLER
Type ON-OFF / PWM Two,NO (1A / 250 VAC)
Set-Point from 0 to 100% of scale
Instruction Manual
Installation Hardware 2 aluminum base SAE 323, 2 “U” clamps in SS 316,
Nuts and washers in SS 316
2. Specifications
ACCESSORIES
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3. Mechanical Description
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The equipment is offered in a compact cast aluminum case, SAE-323 with lower oxidation power,
treated against corrosion, finished with epoxy-electrostatic paint and expanded polypropylene panels
(PU). With reduced dimensions and very light weight, is build under IP-67 protection.
Under the same case, user will find: Local Indicator, Analyzer, Transmitter and Controller of ease
operation. The control installation can be done on Flat Surface or on 2" tube.
The electrical connection is made by a terminal block located at the lower portion of the controller and
cables will go thru 4 cable knockouts of 3/8"BSP.
PARTS DESCRIPTION:
<ESCAPE>
1 - Frontal Lid in ABS
2 - Alphanumeric Display 2 lines x 16 characters
3 - 3 keys tactile membrane:
= Selects the desired option, flashing option.
= Confirms the selected option chosen at SELECT key
= Goes back one step or moves back to prior screen
4 - Cable knockouts (4x) of 3/8" BSP for instrumentation and power cables
5 - Sensor / Turbidity Detector
6 - Bubble Trapper (to remove bubbles)
7 - Cleaning Drainage
8 - Sample Inlet Connection
9 - Sample Drainage
<SELECT>
<ENTER>

4. Turbidity Measurement Principles
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TURBIDITY MEASUREMENT
The measured Turbidity of determined sample, is the reading referred by light
dispersed and absorption that goes thru the sample.
Turbidity does not mean suspended solids measurement, but a effect determination
of light refracted through solids.
Turbidity measurements are used to evaluate the quantity of water sample. To
understand turbidity it is helpful to think about the characteristics of mixtures.
A mixture is defined as Homogenous or Monophasic, when the components of
the mixture are uniformly dispersed, or dissolved, throughout the mixture, Salt water
is an example of a homogenous mixture or Solution. Heterogenous or Polyphasic
mixtures are those whose components are not well distributed throughout the
mixture. The components may simple be floating in the mixture, given enough time
these components will settle out. This type of mixture is also called Suspension.
The clarity of a water sample is directly related to the amount of material suspended in
the water. Turbidity measurements are a way to measure the amount of material
suspended in a water sample. They are commonly used to monitor the effectiveness of
filtration processes.
The OMEGA Turbidity meter uses the principle of Nephelometry. As light of a known
intensity is passed through a sample some of the light will be scattered by particles in the
sample. A detector is placed at 90° to the sample to collect the scattered light. The
intensity of the scattered light is compared to that of the source. This value is reported as
a Nephelometric Turbidity Unit, or NTU. The meter is calibrated with Formazine
standards of a known NTU.
Water can sometimes have color of its own (from humic sources, for example). This
color may interfere with the light source, absorbing some of the light, and reducing the
amount of light reaching the detector. This can cause the measurement to be skewed.
The OMEGA Turbidity Meter LED light source emits at a range close to infrared. In this
range absorption is minimized, and turbidity measurements are more accurate.

4. Turbidity Measurement Principles (cont.)
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As detection involves the difference between the light reaching the vial and
transmitted by the sample placed at the cuvette, it is convenient to minimize the effects
that diminish the light intensity transmitted, among those the most important, it is the
absorption caused by the samples color.
Because of this it is essential to work in a light wavelenght where absorption would be
minimum (close to infrared), if we work in a electromagnetic spectrum visible region, this
color interference would certainly alter the results.
In order to quantify the turbidity, we can use many comparison standards, being NTU
(Nephelometric Turbidity Unit) scale the most common, patronized from formazine
standard suspensions. This way we would have a comparison standard scale between
different materials, in a way we can evaluate turbidity with precision.
Bibliographic References
Bela G. Lipták (chief editor)Analytical Instrumentation;
Howard A. Strobel and William R. Heineman, Chemical Instrumentation, A Systematic
Approach.
Detector
Reflected Light @ 90°
Transmitted
Light
Light Emitting
near “ IR”
Vial
90°

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5. Dimensional
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Cable Length
Dimensions in Millimeters
Electrical
Power
Hose ½” Drainage
Bubble Trapper (remove bubbles) in Black PP
PU Hose - Diam. 6x1mm (Sample Inlet)
Turbidity Sensor / Detector
Cable Knockout 3/8” (2x)
Cable Knockout 3/8” (2x)
PU Tactile Membrane
Alphanumeric Display 2lines x 16characters
Frontal Lid in Resin
ITEM DESCRIPTION
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Below you will find panel dimensional for installation in flat surface and distances between support
holes.
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6. Equipment Installation
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Follow rigorously below instructions:
1- Remove the equipment from its box and verify for any possible damages, caused by the
transportation.
2- Install the controller in a strategic place, of ease access and operation, free of vibrations and
vapors.
3- Avoid direct exposure of the controller to solar rays and in case if necessary, protect the controller.
4- Proceed with terminal connections of cables at terminal barr.
5- Inspect the electrical installation in order to certify that all connections are correct.
6- Verify the power that is being supplied and make sure to connect it the proper place.
7- Connect the circuit breakers from the power distribution box.
3.1. Important Recommendations
3.1.1. The equipment must be Being
so, the power cable of Control Valves, Solenoids, Alarms, etc, must be connected directly at the
Distribution Box, and ""at the equipment connection board.
3.1.2. if the equipment are providing the proper sealing to the cable inlets.
IP-67.
3.1.3. . It reduces impedance, generating measuring errors. Verify the
cable knockout and if necessary, using a hair dryer.
3.1.4. s length,
Contact OMEGA Customer Service.
Electrical Power independent
never
Verify cable knockouts
Be careful with Humidity!!
dry the connection block
Do not cut or try to attach the connection cable.
from other system components.
This proceeding is a must in order to preserve enclosure as
In case you need to change it
Sensor Cable
RF Shield
Meas.
Yellow
Green
Electr. Shield
3.1.5. ON-OFF are , offering innumerous advantages for the equipment, such
as: no presence of sparks, faster commutation, noise practically un-existent, no presence of RF
interference and many more.
The outputs can commute any charge, since they are , l
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outputs thyristor
powered by alternate tension (VAC) imited to
250V / 1A
type

7. Interconnection Barr
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CN2 - Connector 2
CN1 - Connector 1
FUSES
Slots Connection
1 and 2 Electrical Power for 90/240 Vac 50/60Hz connection
3 Ground
4 and 5 SP2 - Set-Point 2 for alarm or control
6 and 7 SP1 - Set-Point 1 for alarm or control
8 and 9 Digital Transmission Output 4 to 20 mA
12 Turbidity Sensor Cable Shield
F1 General Fuse (3.0A)
F2 Set-Point 2 Fuse (1.0 A)
F3 Set-Point 1 Fuse (1.0A)
10 and 11 Serial Communication Output - RS485
13 Green
14 Yellow
15 Measure (Colorless)
16 Turbidity Sensor Cable Shield