Cerlic ITX 20 User manual

2002-11-19 MANE11/02 Ver 2.00
ITX 20
Suspended Solids
Sensor

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TABLE OF CONTENTS
1. Introduction............................................................................................................3
2. A few words about this manual........................................................................3
3. Design......................................................................................................................3
4. Measuring principle..............................................................................................3
5. Unpacking the ITX Suspended Solids Sensor..............................................4
Damages ............................................................................................................ 4
Packaging........................................................................................................... 4
Content............................................................................................................... 4
Optional parts for ITX Suspended Solids Sensor:............................................. 4
6. Mounting of ITX Suspended Solids Sensor...................................................5
Cable Connections ............................................................................................. 5
Installation Tips ................................................................................................. 5
7. Removing the sensor...........................................................................................6
8. Cleaning..................................................................................................................7
Cleaning the Flushing Nozzle............................................................................ 7
Mounting plate for cleaning solenoid valves..................................................... 8
9. Menu for ITX sensor.............................................................................................9
Settings .............................................................................................................. 9
Calibrate............................................................................................................. 9
System.............................................................................................................. 10
10. Calibration ............................................................................................................11
Getting good measurement .............................................................................. 11
Calibration screen............................................................................................ 11
Zero Calibration............................................................................................... 12
Entering sample calibration points –using a sample bucket........................... 13
Alternate calibration, placing sensor in a basin or channel............................. 13
11. Scaling...................................................................................................................14
12. Technical description of sensor ITX 20........................................................15
Optional parts for ITX Suspended Solids Sensor:........................................... 15
13. Dimensions...........................................................................................................16
Appendix 1, Assembly of handrail mounting kit...............................................17
Appendix 2, Assembly of adjustable slide rail...................................................18
Appendix 3, Support information..........................................................................19
Appendix 4, Setup information..............................................................................21

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1. Introduction
The ITX sensor is designed to measure suspended solids concentrations in liquids.
Combined with the BB2 control box, the sensor is used to measure suspended solids
content as a function of the ability of suspended materials to absorb and reflect NIR-
light (Near Infra-Red).
2. A few words about this manual
This manual details installation procedures and operational features of the Cerlic ITX
sensor. Menu navigation and technical data for the BB2 control box can be found in the
BB2 service manual.
3. Design
The ITX sensor is manufactured with 316SS (SS2343) stainless steel. The inside of the
sensor is designed to achieve the highest self-cleaning effect, providing an exact and
reliable measurement with the least possible maintenance under critical applications.
The measuring lenses within the housing are made of glass. The electronics and optics
are protected in the rugged casing, ensuring its reliability in very demanding
environments.
The sensor has a fixed, shielded 10 m (33’) cable used for signal transmission between
the sensor and the BB2 control box. The cable sheath is made of Hytrel and is highly
resistant to aggressive materials and fluids.
4. Measuring principle
The ITX measures transmitted light through the liquid. The measuring principle is based
on the suspended particles’ ability to absorb and reflect NIR (Near Infra-red) light. The
light source is a light emitting diode that pulses and emits monochromatic light with a
wavelength of 880 nm. The detected measuring signal is inversely logarithmical
proportional to the consistency or suspended solids. Signal treatment or linearization is
done within the BB2 control box.
Cross-section of measuring gap.

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5. Unpacking the ITX Suspended Solids Sensor
The unit has been tested and approved before delivery from the supplier. Please check
to confirm that no visible damages occurred during shipment.
Damages
If damages occurred during shipment, immediately contact UPS or other truck line as
well as your Cerlic representative. The shipment can be returned only after contact has
been made with Cerlic.
Packaging
The original packaging is designed to protect the equipment and should be used for
storage or if the goods must be returned.
Content
Please check that the content corresponds to your order and packing list.
Every shipment should include:
•ITX Sensor w/ 10 m (33ft) cable and flushing hose, P/N 11305455
Optional parts for ITX Suspended Solids Sensor:
•Mounting bracket X, incl. rod holder P/N 11205539
•Telescopic rod, 4 m, incl. transmitter holder P/N 20205501
•Adjustable slide rail sensor holder P/N 11205600
•Solenoid valve for flushing P/N 11705516
•Aluminum handrail mounting plate predrilled for BB2
and solenoid valves w/ u-bolts, outside US version P/N 10605533
•Aluminum handrail mounting plate predrilled for BB2
or solenoid valves w/ u-bolts, US version P/N 31204049
•33 ft. (10m) extension cable with plug-in connectors. P/N 20805510
•Y-Splitter for two sensors to one BB2 control box P/N 21505534

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6. Mounting of ITX Suspended Solids Sensor
The ITX is mounted on a telescopic fiberglass rod and placed in a mounting bracket that
fastens to a handrail. Please refer to Appendix 1. As an alternative way of mounting the
sensor, an adjustable slide rail holder is available, please refer to the Appendix 2 for
further details.
When the sensor is measuring in a fume, it is important to find a place where the
suspended solids concentration is representative.
Make sure the flushing nozzle is downstream from the lenses pointing against the
stream. This will avoid having the measurement disturbed by turbulence from the
nozzle. At the same time it will produce a shield around the nozzle, due to a constant
over pressure, preventing particles from getting in.
Cable Connections
Connect the sensor to the BB2 control box using the attached connector on the end of
the sensor cable. In the event that two sensors are to be connected to the same BB2
control box, use the Y-splitter.
NOTE! Never try to turn the connector housing to fasten or remove the connector, only
the fluted ring at the top of the connector shall be turned.
Installation Tips
•Adjust the rod so that the sensor is at least 12” below the liquid surface or the lowest
water level in decant applications to prevent the sensor from coming out of the
liquid.
•In an aeration tank, ensure that the sensor is not directly above a diffuser head. It
should be on the backside of the rolling diffuser effect.
•Flushing may not be required if the tank is well agitated. To verify the need for
flushing, remove the sensor from the liquid after it has been in the liquid for several
days. Place the sensor in a bucket of clean water and note the concentration value.
If the value does not get close to zero, then the flush system should be utilized.
•When installing in a clarifier, compressed air flushing is required due to no agitation
of liquid and to remove oil and grease film on lens. This is especially applicable in
primary clarifiers.
•When using the ITX for influent applications, always install the unit after the bar
screen. If the bar screen spacing is larger than ¼’ (6 mm), then a baffle or diffuser
plate should be installed in front of sensor to prevent rags from catching on the
sensor head. On influent applications, compressed air flushing is recommended due
to the oil or grease in the liquid.
•In effluent applications a CTX type of sensor is recommended, it has better
resolution at low concentrations.

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7. Removing the sensor
The sensor is removed in the following steps:
•Disconnect the sensor cable from the BB2 and the flushing hose from solenoid.
•Open the clamp, and pull the rod out of the mounting bracket
•Make sure all water inside the rod is drained.
•Clean the sensor and rod with a brush or clean cloth. Do not use a wire brush!
•Open the black sensor adapter.
•Flush the inside of the rod with clean water.
•Mount the protective cap (or a small plastic bag) on the sensor cable connector.
•Pull the cable and flushing hose out of the rod.
•Blow compressed air through the flushing hose to get rid of the water in the hose
and the sensor.

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8. Cleaning
The sensor is equipped with built-in flushing nozzles. The nozzles are used to direct the
cleaning liquid or air through a ¼” hose that is connected to the top of the sensor
housing. A solenoid valve that is wired to an alarm relay in the BB2 control box
controls the air or liquid. Water is recommended for flushing in aeration basins.
Compressed air is recommended for most other applications.
Flushing tubeWater
Flushing must be activated in the “Settings” menu in the BB2 control box:
•Select the ITX transmitter in the Main Menu by using the or buttons.
•Press ENTER for approximately five seconds to enter the Transmitter Menu.
•Use the arrows to select “Settings” and press ENTER.
•Use the arrows to select “Cleaning” and press ENTER.
•In the “Cleaning” submenu, adjust the “Cleaner” setting to “flush” and specify
the cleaning interval in minutes and the flush time in seconds.
•Specify the relay to be used according to the wiring inside the control box. For
example, if the solenoid is wired to relay #1, select “#1” for flushing.
•“Next time” displays the next time flush will be activated, pushing ENTER will
set it to current time and those start cleaning..
NOTE! Pay attention to the requirements for protection against backflow, according to
the EN 1717 standard for drinking water devices. If possible, use plant reuse water or
effluent water for cleaning.
Cleaning the Flushing Nozzle
The flushing nozzle and sensor cannot be disassembled in the field. An attempt to
disassemble will void the warranty. If the flushing nozzle becomes plugged, it can
usually be cleaned by backflushing it with clean water. Before attempting to backflush,
close the valve for the flush water source and disconnect the sensors flushing hose from
the solenoid valve. Then, place a ½” hose over the flush nozzle and carefully open the
water valve. The pressure should clear the line of solids. If backflushing does not work
initially, try cleaning the three flushing nozzles with a needle. Try backflushing the
nozzles again as described above until clean water comes out at the solenoid valve end
of the hose.

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Mounting plate for cleaning solenoid valves
To provide an easy mounting of solenoid valves for the built-in flushing nozzles Cerlic
offers a predrilled Aluminum handrail mounting plate. The Mounting plate is fixed to
the rail using two u-bolts.
Please see technical specifications for details and ordering information on Solenoid
Valves and Mounting Plate.
Mounting plate for one or two solenoids,
outside US version.

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9. Menu for ITX sensor
Use or to select the sensor in the main display. The menu for the selected sensor
is accessed by pressing ENTER for five seconds. If the selected sensor is not active (the
text No transmitteris shown) a warning is displayed that asks you to make another
choice in order to show the sensor menu.
Settings
I-Time Integration time or dampening -can be set up to 999 seconds
Unit ”%”, ”ppm”, ”g/l”, or ”mg/l”
Alarm Relay ”-” ”#1”, ”#2”, or ”#1 and #2”. Check that the relay is not being
used for cleaning
Analog ”None”, ”Channel 1”, ”Channel 2”, or ”Both”. Pick which analog
output contacts are to be used with sensor
Cleaning Press ENTER to go to Cleaning program
Cleaner ”None”, ”Flush”, or ”Brush”. Do not select “Brush” since this
does not exist for ITX sensor
Interval min 0-999 minutes, time between cleaning cycles
Length sec 0-999 seconds, duration of flushing cycle
Freeze sec 0-999 seconds, extra freeze time of output signal after a
flushing cycle
Relay ”-”, ”#1”, or ”#2”. Select relay to operate solenoid for flush cycle.
These are the same relays used for “Alarm relay” above
Next time The next scheduled cleaning time. Pushing “Enter” on this line
will set the time to current time and start a cleaning cycle. This
could be used to test the “Flush” cycle.
Calibrate
Take sample No, Zero, #1, n#2, #3, #4, #5. Sensor stores current MS (light)
value in memory and you enter a lab solids value below to
complete calibration.
Con Current concentration, (same as shown in the main menu)
Sample #1 Lab test –consistency/suspended solids value for Sample 1
Sample #2 Lab test –consistency/suspended solids value for Sample 2
Sample #3 Lab test –consistency/suspended solids value for Sample 3
Sample #4 Lab test –consistency/suspended solids value for Sample 4
Sample #5 Lab test –consistency/suspended solids value for Sample 5

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Scale
Max 0-99.9 % or 0-99999.9 ppm, mg/l, or g/l (units selected in the
“Settings” menu), equal to 20 mA output signal.
Min 0-99.9 % or 0-99999.9 ppm, mg/l, or g/l (units selected in the
“Settings” menu), equal to 4 mA output signal.
Hi Alarm 0-99.9 % or 0-99999.9 ppm, mg/l, or g/l (units selected in the
“Settings” menu) , the value zero inactivates the alarm
Low Alarm 0-99.9 % or 0-99999.9 ppm, mg/l, or g/l (units selected in the
“Settings” menu) , the value zero inactivates the alarm
System
Type Type of sensor, read only
Serial Serial number of the sensor, read only
SoftW Software version of the sensor, read only
Temp Sensor temperature, read only
Samples Press “ENTER” to go to view SA values and consistency or
suspended solids values. This is a READ ONLYSection.
SA 0 SA value for zero sample
SA 1 SA value for sample # 1
Cons 1 Lab test -consistency or suspended solids value for Sample # 1
…. SA and Cons repeated for samples 2 to 5
Info Press “ENTER” to go to “info” read only menu. This menu is for
Cerlic internal use, it may change without notice
MS linearized light signal, which are SA values in calibration chart
Con Unit value in %, ppm, mg/l, or g/l after MS value has been
converted to units due to sample values. This is displayed on
main screen
SA 0 SA value for zero sample
SA 1 SA value for sample # 1
Cons 1 Lab test -consistency or suspended solids value for Sample # 1
Ch1a Raw value for channel 1
Ch1 Raw value for channel 1, compensated for changed intensity
Zero Int Intensity for clear water, set during zero calibration
Intensity Currently used intensity
I-offset Intensity offset, set during zero calibration
Temp Calib Compensation factor for temperature drift on low solids
applications
Samp/s Number of samples per second
Service Not accessible for users.