wtw IQ SENSOR NET NiCaVis 705 IQ NI User manual

ba75988e01 11/2012
IQ SENSOR NET
NiCaVis 701 IQ NI
NiCaVis 705 IQ NI
Operating manual
NiCaVis 701 IQ NI
NiCaVis 705 IQ NI
Optical sensor for the
spectral determination of
nitrite, nitrate and carbon sum
parameters

NiCaVis 70x IQ NI
ba75988e01 11/2012
The latest version of the present operating manual can be found on the
Internet at www.WTW.com.
Copyright © Weilheim 2012, WTW GmbH
Reprinting - even as excerpts - is only allowed with the explicit written
authorization of WTW GmbH, Weilheim.
Printed in Germany.

NiCaVis 70x IQ NI Contents
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NiCaVis 70x IQ NI - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
1.1 How to use this component operating manual . . . . . . . . 3-1
1.2 Fields of application . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
1.3 Measuring principle of the UV sensor . . . . . . . . . . . . . . 3-2
1.4 Structure of the UV sensor . . . . . . . . . . . . . . . . . . . . . . . 3-3
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
2.1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
2.1.1 Safety information in the operating manual . . . . 4-1
2.1.2 Safety signs on the product . . . . . . . . . . . . . . . .4-1
2.1.3 Further documents providing safety information 4-1
2.2 Safe operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
2.2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
2.2.2 Requirements for safe operation . . . . . . . . . . . . 4-2
2.2.3 Unauthorized use . . . . . . . . . . . . . . . . . . . . . . . 4-2
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
3.1 IQ SENSOR NET system requirements . . . . . . . . . . . . . . 5-1
3.2 Scope of delivery of the NiCaVis 70x IQ NI . . . . . . . . . . 5-1
3.3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
3.3.1 Mounting the sensor . . . . . . . . . . . . . . . . . . . . . 5-2
3.3.2 Mounting the shock protectors . . . . . . . . . . . . . 5-4
3.3.3 Connecting the sensor to the IQ SENSOR NET .5-5
3.4 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
3.4.1 General information . . . . . . . . . . . . . . . . . . . . . . 5-7
3.4.2 Sensor structure . . . . . . . . . . . . . . . . . . . . . . . . 5-8
3.4.3 Settings for the main sensor . . . . . . . . . . . . . . . 5-9
3.4.4 Settings for virtual sensors . . . . . . . . . . . . . . .5-12
4 Measuring / Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
4.1 Determination of measured values . . . . . . . . . . . . . . . . 6-1
4.2 Measuring operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
4.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
4.3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
4.3.2 User calibration . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
4.3.3 Sensor check/
Zero adjustment . . . . . . . . . . . . . 6-8

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5 Maintenance and cleaning . . . . . . . . . . . . . . . . . . . . . . .7-1
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
5.2 Sensor cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
5.2.1 Cleaning agents and accessories . . . . . . . . . . .7-1
5.2.2 General steps to be taken . . . . . . . . . . . . . . . . .7-2
5.2.3 Basic cleaning . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
5.2.4 Cleaning the measuring gap . . . . . . . . . . . . . . .7-4
6 Spare parts, maintenance equipment, accessories . . . .8-1
7 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
8 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
8.1 Measurement characteristics . . . . . . . . . . . . . . . . . . . .10-1
8.2 Application conditions . . . . . . . . . . . . . . . . . . . . . . . . . .10-3
8.3 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-5
8.4 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-6
9 Indexes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-1
9.1 Explanation of the messages . . . . . . . . . . . . . . . . . . . .11-1
9.1.1 Error messages . . . . . . . . . . . . . . . . . . . . . . . .11-2
9.1.2 Info messages . . . . . . . . . . . . . . . . . . . . . . . . .11-4
9.2 Status info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-5
10 Appendix: Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-1

NiCaVis 70x IQ NI Overview
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1Overview
1.1 How to use this component operating manual
Structure of the
IQ SENSOR NET operating
manual
Fig. 1-1 Structure of the IQ SENSOR NET operating manual
The IQ SENSOR NET operating manual has a modular structure like the
IQ SENSOR NET itself. It consists of a system operating manual and the
operating manuals of all the components used.
Please file this component operating manual into the ring binder of the
system operating manual.
IQ Sensor Net Operating Manual
System
Operating
Manual
(Ring Binder)
IQ Sensor
Operating
Manual
MIQ Module
Operating
Manual
MIQ Terminal
Operating
Manual
Component Operating Manuals

Overview NiCaVis 70x IQ NI
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1.2 Fields of application
The NiCaVis 70x IQ NI is an online sensor for the on-site determination
of nitrite, nitrate and carbon sum parameters in waste water treatment
plants.
The range of application comprises control, feedback control and mon-
itoring.
Measuring location
Ultrasound cleaning
system
The ultrasound cleaning system ensures low maintenance and long-
term reliable measurement operation.
The ultrasound source integrated in the sensor excites the measure-
ment windows to produce vibrations in the ultrasound range. The
movement of the surface as a result of this prevents the growth of
pollution in almost all cases and, thus, ensures reliable measured
values during continuous operation.
Compressed air cleaning
(option)
The sensor is designed to be equipped with an additional compressed
air-driven cleaning system, which supports the ultrasound cleaning
system as necessary.
1.3 Measuring principle of the UV sensor
The UV sensor operates according to the measuring principle of UV
spectrometry.
Any substance contained in a measuring solution attenuates a light
beam that penetrates the measuring solution. The attenuation (absor-
bance) of the light beam is measured for different wavelengths. The
wavelength dependent distribution produces the absorbance spec-
trum.
The wavelength range where an absorbance occurs is characteristic of
the substance. The extent of the absorbance depends on the amount
of the substance.
The influence of typical interference matrix variants occurring at munic-
ipal waste water treatment plants can be eliminated by including the
entire absorbance spectrum.
With this measuring principle, measuring does not take place continu-
ously but at intervals.
NiCaVis 701 IQ NI Aeration tank, inlet or outlet
NiCaVis 705 IQ NI Outlet

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1.4 Structure of the UV sensor
A UV sensor contains a light source (1), a measuring gap (3) to enable
the contact of light with the measuring solution, and a detector (5) to
measure the attenuated light beam.
The sender of the optical system (2) directs a light beam, the measuring
beam (6), through the measuring solution and a second light beam, the
reference beam (8), over a distance without measuring solution. The
test sample is between both measurement windows (3) in the
measuring gap.
The receiver of the optical system (4) directs the measuring beam and
reference beam to the detector. In the detector, the light is received by
fixed photo diodes.
Fig. 1-2 Structure of a UV sensor
1Light source
2Sender of the optical system
3Measuring gap between the measurement windows
4Receiver of the optical system
5Detector
6Measuring beam
7Reference beam
8Connection for the optional compressed air cleaning system
7
6
34
8
21 5

Overview NiCaVis 70x IQ NI
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CarboVis 70x IQ TS Safety
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2Safety
2.1 Safety information
2.1.1 Safety information in the operating manual
This operating manual provides important information on the safe operation of
the product. Read this operating manual thoroughly and make yourself familiar
with the product before putting it into operation or working with it. The operating
manual must be kept in the vicinity of the meter so you can always find the infor-
mation you need.
Important safety instructions are highlighted in this operating manual. They are
indicated by the warning symbol (triangle) in the left column. The signal word
(e.g. "CAUTION") indicates the danger level:
WARNING
indicates a possibly dangerous situation that can lead to serious (irreversible)
injury or death if the safety instruction is not followed.
CAUTION
indicates a possibly dangerous situation that can lead to slight (reversible) injury
if the safety instruction is not followed.
Note
indicates a situation where goods might be damaged if the actions mentioned
are not taken.
2.1.2 Safety signs on the product
Note all labels, information signs and safety symbols on the product. A warning
symbol (triangle) without text refers to safety information in this operating
manual.
2.1.3 Further documents providing safety information
The following documents provide additional information, which you should
observe for your safety when working with the measuring system:
Operating manuals of other components of the IQ SENSOR NET system
(power packs, controller, accessories)
Safety datasheets of calibration and maintenance equipment (e.g. cleaning
solutions).

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2.2 Safe operation
2.2.1 Authorized use
The authorized use of the NiCaVis 70x IQ NI consists of its use as a sensor in
the IQ SENSOR NET. Only the operation and running of the product according to
the instructions and technical specifications given in this operating manual is
authorized (see chapter 8 TECHNICAL DATA). Any other use is considered unau-
thorized.
2.2.2 Requirements for safe operation
Note the following points for safe operation:
The product may only be operated according to the authorized use specified
above.
The product may only be supplied with power by the energy sources men-
tioned in this operating manual.
The product may only be operated under the environmental conditions men-
tioned in this operating manual.
The product may not be opened.
2.2.3 Unauthorized use
The product must not be put into operation if:
it is visibly damaged (e.g. after being transported)
it was stored under adverse conditions for a lengthy period of time (storing
conditions, see chapter 8 TECHNICAL DATA).

NiCaVis 70x IQ NI Commissioning
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3 Commissioning
3.1 IQ SENSOR NET system requirements
Software statuses of the
controller and terminal
components
The operation of the NiCaVis 70x IQ NI requires the following software
versions in the IQ SENSOR NET:
For cleaning with
compressed air via a relay
3.2 Scope of delivery of the NiCaVis 70x IQ NI
The following parts are included in the scope of delivery of the
NiCaVis 70x IQ NI:
UV sensor
Sensor sleeve
Shock protectors
Operating manual
DIQ/S 182 Controller software: Version 3.45 or higher
MIQ/MC2 Controller software: Version 3.37 or higher
MIQ TC 2020 XT Controller software: Version 3.37 or higher
IQ Software pack
CONNECT
Software version: Version 1.00 or higher
MIQ/CR3 Software version: Version 2.88 or higher
MIQ/R6 Software version: Version 2.88 or higher
MIQ/CHV PLUS Software version: Version 2.88 or higher
DIQ/S 182 (XT) Software version: Version 3.44 or higher

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3.3 Installation
3.3.1 Mounting the sensor
Note
The sensor is an optical precision instrument that is to be protected
against shocks. Make sure the distances to the wall, bottom and other
installation surroundings are sufficient. If necessary, protect the sensor
from hitting with the protective ring provided. Mount any fixing elements
only on the stable metal shaft.
Note
Always make sure the surface of the enclosure is not damaged by
sharp-edged objects. The enclosure of the sensor may not touch any
metallic objects in order to prevent contact corrosion.
Note
Do not suspend the sensor on the sensor connection cable. Risk of ca-
ble break and water penetration at the cable gland.
A wide range of mounting accessories is available for the installation of
the NiCaVis 70x IQ NI (see chapter 6 SPARE PARTS, MAINTENANCE
EQUIPMENT, ACCESSORIES). Thus, all prevalent ways of mounting are
possible.
Generally, observe the following general rules when mounting the
sensor at the measuring location:
Horizontal installation When mounting the sensor horizontally, the measuring gap opening
should be on the side. Thus, any air bubbles can escape upward after
cleaning and no sediment can collect in the measuring gap. The sensor
should be aligned in parallel with the flow direction.
Fig. 3-1 Horizontal installation
Measuring gap opening
Flow direction

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Vertical installation For vertical installation, mount the sensor in a position that allows inter-
fering elements in the measuring gap to escape with the current. In the
case of vertical installation, the minimum flow rate is 0.2 m/s so the
measuring gap is kept clean optimally.
Fig. 3-2 Vertical installation
Protection against shocks When installing the sensor, always make sure it cannot knock against
a wall or another obstacle. Make sure the safety margins are sufficient
(e. g. with suspended mounting).
Mount the enclosed shock protectors (see section 3.3.2). Their soft rub-
ber compound absorbs hard impacts.
Fig. 3-3 Sensor with mounted shock protectors
Flow direction
easuring gap opening

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3.3.2 Mounting the shock protectors
The shock protectors consist of two rings, a cap and four cable ties. To
mount the shock protectors, proceed as follows:
Fig. 3-4 Mounting the shock protectors
1. Plug the cap (pos. 2 in Fig. 3-4) on one of the two rings (pos. 1).
2. Put the assembled unit on the sensor end and fix it with 2 cable
ties (pos. 3) as shown in Fig. 3-4.
3. Put the second ring on the cable end of the sensor and fix it
with the remaining two cable ties in the same way.
1
3
2
Sensor with mounted
shock protectors

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3.3.3 Connecting the sensor to the IQ SENSOR NET
Connection cable A sensor connection cable of the SACIQ or SACIQ SW type is required
to connect the sensor. The cable is available in different lengths.
Compared to the standard model SACIQ, the SACIQ SW sensor
connection cable is optimized regarding its corrosion resistance in
seawater and brackish water and adapted for use in conjunction with
the NiCaVis 70x IQ NI . Information on this and other IQ SENSOR NET
accessories is given in the WTW catalog and on the Internet.
How to connect the SACIQ (SW) sensor connection cable to the termi-
nal strip of an MIQ module is described in chapter 3 INSTALLATION of the
IQ SENSOR NET system operating manual.
Are the plug connections
dry?
Before connecting the sensor and sensor connection cable, please
make sure the plug connections are dry. If moisture gets into the plug
connections, first dry the plug connections (dab them dry or blow them
dry using compressed air).
Note
Do not suspend the sensor on the sensor connection cable but use the
suitable mounting equipment. Information on this and other
IQ SENSOR NET accessories is given in the WTW catalog and on the In-
ternet.

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Connecting the sensor to
the sensor connection
cable
Fig. 3-5 Connecting the sensor
1. Take the protective caps off the plug connections of the sensor
and the SACIQ (SW) sensor connection cable and keep them
safe.
2. Plug the socket of the SACIQ (SW) sensor connection cable
onto the plug head connector of the sensor. At the same time,
rotate the socket so that the pin in the plug head connector (1)
clicks into one of the two holes in the socket.
3. Then screw the coupling ring (2) of the sensor connection
cable onto the sensor up to the stop.
SACIQ (SW)
1
2

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3.4 Initial commissioning
3.4.1 General information
CAUTION
Never look into the measuring window or put objects into the measur-
ing window during operation! The emitted UV radiation can damage the
eyes!
In the case of authorized use, inadvertent eye contact with the light
beam is not possible.
Measuring location The sensor is immediately ready to measure.
How to adjust the settings is described in the following section (section
3.4.3).
User calibration after initial
commissioning
On the basis of a reference measurement ("laboratory value"), check
whether the default settings deliver sufficiently accurate measured
values or whether you want to carry out a user calibration (see section
4.3 CALIBRATION).

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3.4.2 Sensor structure
The physical sensor is the sensor with the instrument or model desig-
nation, NiCaVis 70x IQ NI. The physical sensor processes the mea-
surement signal (absorbance spectrum) and supplies up to 5
measurement results to the IQ SENSOR NET. The measurement results
are administrated like 5 sensors that differ in hierarchy as follows:
Main sensor The sensor for nitrite/nitrate measurement is the main sensor.
It registers on the system under the designation, NiCaVis 70x IQ NI
and the series number of the physical sensor.
Virtual sensors All other sensors for nitrite/nitrate measurement or carbon measure-
ment are virtual sensors.
You register on the system under the designation, NiCaVis 70x IQ NI
and the series number of the physical sensor.
Sensor overlapping
settings and functions
Some settings and functions are sensor overlapping. Sensor overlap-
ping settings are generally edited in the setting menu of the main sen-
sor.
These are the most important sensor overlapping settings and func-
tions:

Measuring location
Times of the measuring cycle (
Meas. interval , Cleaning duration , Adjustment phase etc.)

Signal smoothing
Details on sensor overlapping functions are given in the following
section.

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3.4.3 Settings for the main sensor
Measuring cycle A measuring cycle consists of the cleaning procedure, the adjustment
time for the measuring system and the determination of the measured
value. The following graphic demonstrates the relevant settings:
Fig. 3-6 Measuring cycle of the UV sensor
Carrying out settings Using <S>, switch from the measured value display to the main menu
of the settings. Then navigate to the setting menu (setting table) of the
sensor. The procedure is described in detail in your IQ SENSOR NET
system operating manual.
A change of the following settings will take some time (up to a few min-
utes) until it can be seen in the measured value display:

Measuring mode
 Measuring location
 Number of N-sensors
 Number of C-sensors
Further changes can only be made when the last changes are visible
in the measured value display.
Default values are marked in bold.
Time
Adjustment time
Measurement
Measuring
cycle
Measuring interval
Cleaning
Menu item Settings Explanations
Measuring mode  NO3-N
 NO3
 NO2-N
 NO2
The measured parameter is displayed
in the selected citation form.
When changing the
Measuring mode
setting, always check the
Measuring
location
setting.

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Measuring location NiCaVis 701 IQ NI:
 Activation
 Inlet
 Outlet
NiCaVis 705 IQ NI:
 Outlet
(permanently set)
Measurement location or application of
the sensor.
The possible measurement loca-
tions are displayed depending on the
currently set measuring mode.
The sample matrix on which the cal-
culation of the measured value is
based changes with the location of
the sensor.
When the measurement location is
changed, all virtual sensors are
deleted.
Measuring range - Display of the measuring range
(see chapter 8 TECHNICAL DATA).
Cal - # raw value 1 Value pairs of the user calibration (see section 4.3.2).
Note: Leave those values unchanged during the initial commission-
ing.
Cal - ref. value 1
Cal - # raw value 2
Cal - ref. value 2
Number of N-sensors
Number of C-sensors
1 ... 2
0 ... 3
Apart from the main sensor, up to 4
more sensors can be displayed.
The settings for the additional sensors
are done in the menus for the respec-
tive sensors.
Zero adjustment Factory
User
Setting of which zero adjustment is
used in the sensor.
Factory zero adjustment or
Zero adjustment carried out last
Signal smoothing  On
 Off
Switching on/off the signal smoothing.
For more details, see
Response time
t90
.
Menu item Settings Explanations