wtw FDO 700 IQ SW User manual

ba75586e03 05/2009
FDO 700 IQ
FDO 700 IQ SW
Operating manual
Optical IQ SENSOR NET D.O. sensor
FDO 700 IQ
FDO 700 IQ SW

FDO 700 IQ (SW)
ba75586e03 05/2009
Accuracy when going to
press The use of advanced technology and the high quality standard of our instruments are the result of continuous development. This may result
in differences between this operating manual and your instrument.
Also, we cannot guarantee that there are absolutely no errors in this
manual. Therefore, we are sure you will understand that we cannot
accept any legal claims resulting from the data, figures or descriptions.
Note
The latest version of the present operating manual can be found on the
Internet under www.WTW.com.
Copyright ©Weilheim 2007, WTW GmbH
Reprinting - even as excerpts - is only allowed with the explicit written
authorization of WTW GmbH, Weilheim.
Printed in Germany.

FDO 700 IQ (SW) Contents
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FDO 700 IQ (SW) - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1 How to use this component operating manual . . . . . . . . 1-1
1.2 Structure of the FDO 700 IQ (SW) . . . . . . . . . . . . . . . . . 1-2
1.3 Recommended fields of application . . . . . . . . . . . . . . . . 1-3
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 2-2
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2 IQ SENSOR NET system requirements . . . . . . . . . . . . . . 3-1
3.3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.4 Commissioning / Getting the instrument ready for
measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.5 FDO 700 IQ (SW) setting table . . . . . . . . . . . . . . . . . . . 3-3
4 Measuring / Operation . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2 Function check and user calibration . . . . . . . . . . . . . . . . 4-1
4.2.1 General information . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2.2 Function check . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.2.3 User calibration . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4.2.4 Calibration history . . . . . . . . . . . . . . . . . . . . . . . 4-6
4.2.5 Reactivating previous calibration data . . . . . . . 4-7
5 Maintenance, cleaning, replacement parts . . . . . . . . 5-1
5.1 General maintenance notes . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2 Handling of the sensor cap . . . . . . . . . . . . . . . . . . . . . . 5-2
5.3 Exchanging the sensor cap . . . . . . . . . . . . . . . . . . . . . . 5-2
5.4 Cleaning the sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.4.1 Exterior cleaning . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.4.2 Interior cleaning of sensor cap and sensor
head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.5 Replacement parts and accessories . . . . . . . . . . . . . . . 5-5
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Contents FDO 700 IQ (SW)
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7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.1 Measuring characteristics . . . . . . . . . . . . . . . . . . . . . . . .7-1
7.2 Application conditions . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
7.3 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
7.4 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4
8 Indexes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.1 Explanation of the messages . . . . . . . . . . . . . . . . . . . . .8-1
8.1.1 Error messages . . . . . . . . . . . . . . . . . . . . . . . . .8-1
8.1.2 Info messages . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
8.2 Status info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3

FDO 700 IQ (SW) 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 system 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 FDO 700 IQ (SW)
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1.2 Structure of the FDO 700 IQ (SW)
Fig. 1-2 Structure of the D. O. sensor (example: FDO 700 IQ)
Sensor cap with
memory chip A memory chip is integrated in the sensor cap. The following data is stored on the memory chip:
zType designation of the sensor cap
zSeries number
zData of the factory calibration
1Shaft
2Plug head connector
3Fixing ring
4Sensor membrane
5Sensor cap with memory chip
6Gold-plated contact pins for memory chip
7Measurement window
8Temperature sensor and locking device
9Sensor head
67
8453
9
12

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Intelligent membrane
(IQMC technology) For each membrane the individual calibration values are determined by a factory calibration process and stored on the memory chip of the
sensor cap, ensuring maximum accuracy over the whole lifetime of the
sensor.
1.3 Recommended fields of application
FDO 700 IQ Stationary measurements in water/wastewater applications.
FDO 700 IQ SW Stationary measurements in seawater, aquaculture.

Overview FDO 700 IQ (SW)
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FDO 700 IQ (SW) Safety instructions
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2 Safety instructions
This component operating manual contains special instructions that
must be followed during the operation of the FDO 700 IQ (SW) D.O.
sensor. Thus, it is essential to read this component operating manual
before carrying out any work using this sensor. In addition to this
manual, the SAFETY chapter of the IQ SENSOR NET system operating
manual must be followed.
Always keep this component operating manual together with the
system operating manual and any other component operating manuals
in the vicinity of the IQ SENSOR NET system.
General safety
instructions Safety instructions in this operating manual are indicated by the warning symbol (triangle) in the left column. The signal word (e.g.
"Caution") indicates the danger level:
Warning
indicates instructions that must be followed precisely in order to
prevent serious dangers to personnel.
Caution
indicates instructions that must be followed precisely in order to
avoid slight injuries to personnel or damage to the instrument or
the environment.
Other labels
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. operating
manuals.

Safety instructions FDO 700 IQ (SW)
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2.1 Authorized use
The authorized use of the FDO 700 IQ (SW) comprises its use as a
D.O. sensor in the IQ SENSOR NET.
Please observe the technical specifications according to chapter 7
TECHNICAL DATA. Only operation according to the instructions in this
operating manual is authorized.
Any other use is considered to be unauthorized. Unauthorized use
invalidates any claims with regard to the guarantee.
Caution
Only connect and operate the sensor together with IQ SENSOR NET
accessories.
2.2 General safety instructions
The sensor left the factory in a safe and secure technical condition.
Function and
operational safety The failure-free function and operational safety of the sensor is only guaranteed if the generally applicable safety measures and the special
safety instructions in this operating manual are followed during its use.
The failure-free function and operational safety of the sensor is only
guaranteed under the environmental conditions that are specified in
chapter 7 TECHNICAL DATA.
The specified temperature (chapter 7 TECHNICAL DATA) must be
maintained during the operation and transport of the sensor. Protect
the sensor, particularly against frost or overheating.
Caution
The sensor may only be opened by specialists authorized by
WTW. The only exceptions to this are the activities described in
chapter 5 MAINTENANCE, CLEANING, REPLACEMENT PARTS.

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Safe operation If safe operation is no longer possible, the sensor must be taken out of
operation and secured against inadvertent operation.
Safe operation is no longer possible if the sensor:
zhas been damaged in transport
zhas been stored under adverse conditions for a lengthy period of
time
zis visibly damaged
zno longer operates as described in this manual.
If you are in any doubt, contact the supplier of your sensor.
Obligations of the
operator The operator of the sensor must ensure that the following rules and regulations are followed when dealing with hazardous substances:
zEEC directives for protective labor legislation
zNational protective labor legislation
zSafety regulations
zSafety data sheets of the chemical manufacturer.

Safety instructions FDO 700 IQ (SW)
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FDO 700 IQ (SW) Commissioning
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3 Commissioning
3.1 Scope of delivery
zFDO 700 IQ (SW) with SC FDO 700 sensor cap
zOperating manual.
3.2 IQ SENSOR NET system requirements
Software statuses of the
controller and terminal
components
The operation of the FDO 700 IQ (SW) requires the following software
versions in the IQ SENSOR NET:
3.3 Installation
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 FDO 700 IQ SW. Information on this and other IQ SENSOR NET
accessories is given in the WTW catalog and on the Internet.
Note
How to connect the SACIQ (SW) sensor connection cable to the
terminal strip of an MIQ module is described in chapter 3 INSTALLATION
of the IQ SENSOR NET system operating manual.
zMIQ/C184 (XT) Controller software: Version 2.66 or higher
Terminal software: Version 2.66 or higher
zMIQ/MC Controller software: Version 2.66 or higher
zMIQ/T 2020
(PLUS)
Terminal software: Version 2.66 or higher
zIQ software pack Software version: 4.10 or higher

Commissioning FDO 700 IQ (SW)
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Are the plug
connections dry? Before connecting the sensor and sensor connection cable, please make sure that 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. Use a
sensor holder or an armature. Information on this and other
IQ SENSOR NET accessories is given in the WTW catalog and on the
Internet.
Connecting the sensor
to the sensor
connection cable
Fig. 3-1 Connect the sensor
1Take the protective caps off the plug connections of the sensor
and the SACIQ (SW) sensor connection cable and keep them
safe.
2 Plug the jack 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.
3Then screw the coupling ring (2) of the sensor connection
cable onto the sensor up to the stop.
SACIQ
1
2

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3.4 Commissioning / Getting the instrument ready for
measuring
Identification in the
IQ SENSOR NET
The sensor has to be equipped with the sensor cap for a successful
login to the IQ SENSOR NET. The operable sensor is displayed as
follows in the list of sensors:
zType designation of the sensor cap ("SC FDO 700")
zSeries number of the FDO 700 IQ or FDO 700 IQ SW sensor
Commissioning steps
3.5 FDO 700 IQ (SW) setting table
1Pull the protective cap off the sensor.
2 If required, assign a user-defined name to the sensor (see
relevant IQ SENSOR NET system operating manual).
3When using IQ SENSOR NET without automatic air
pressure compensation the mean air pressure value or the
location altitude has to be entered (for more detailed
information see the relevant IQ SENSOR NET system operating
manual).
4 Set the sensor (see section 3.5).
Setting Selection/values Explanation
Measuring mode zConcentration
zSaturation
Unit of the measured value on the measured
value display.
Measuring range
Concentration
z0 ... 20.00 mg/l
z0 ... 20.00 ppm
These measuring ranges are available for
selection.
Measuring range
Saturation
z0 ... 200.0 % The measuring range is set permanently.
Response time t90 30 ... 300 s Response time of the signal filter.
Depending on the sample matrix, the
measured values may fluctuate more or less.
A signal filter in the sensor reduces the
fluctuation range of the measured value. The
signal filter is characterized by the Response
time t90. This is the time after
which 90 % of a signal change is displayed.

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Calibration zFactory
calibration
zUser calibration
z active
z abort
Determines which calibration data the
measured value calculation will be based on.
The active calibration is displayed in the
calibration history.
The selection, User calibration is only
displayed if valid data of a User calibration is
stored in the sensor.
active indicates that the sensor is being
calibrated.
If abort is selected, the active calibration is
canceled the next time the setting table is
quit with Save and quit.
Temperaturmodus z°C
z°F
Unit of the measured temperature value
(Celsius, Fahrenheit).
Temp. adjustment -1.5 K ... +1.5 K The temperature compensation enables the
temperature display to be balanced (shifting
of the zero point by ±1.5K).
Notes:
zDue to the thermal capacity of the sensor,
it is necessary to place it in a container
with at least 2 liters of water.
zLeave the sensor in this container for at
least 15 minutes while stirring
occasionally until the balancing can be
performed.
With temperature differences between the
water and sensor > 10 °C, leave the
sensor for at least 1 hour in this container
while stirring occasionally until the
balancing can be performed.
Salinity zOn
zOff
Determines whether the entered salinity
should be taken into account.
Setting Selection/values Explanation

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Carrying out settings Switch to the main settings menu from the measured value display with
s. Then navigate to the setting menu (setting table) of the sensor.
The exact procedure is described in the relevant IQ SENSOR NET
system operating manual.
Note
For information on oxygen measurement in solutions that contain salt,
see WTW application report no. 1193118.
Salinity input 2.0 ... 70.0 The entry of the salinity enables a salt
content correction that compensates for the
effect of salt contents > 0.1 % on the oxygen
measurement.
The salt content correction is recommended
for measurements in salt-contaminated
wastewater (salinity ≥2.0 corresponding to a
conductivity of ≥3.4 mS/cm at a reference
temperature TREF = 20 °C).
Sensor cap data zDo not download
zTransmit to log
book
Generates a log book message with all data
stored in the sensor cap when the settings
are quit with Save and quit (see section 1.2).
When opening the menu again the setting is
reset to Do not download.
Save and quit The system confirms the saving of the
settings and the display switches to the next
higher level.
Quit The display switches to the next higher level
without saving the new settings.
Setting Selection/values Explanation

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FDO 700 IQ (SW) Measuring / Operation
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4 Measuring / Operation
4.1 Measuring
Warning
Contact with the sample can be dangerous for the user!
Depending on the type of sample, suitable protective measures
must be taken (protective clothing, protective goggles, etc.).
Note the data given in section 7.2 APPLICATION CONDITIONS, especially
the minimum immersion depth of the sensor (> 50 mm). The measured
value is available immediately on submersing.
Note
If keeping the sensor clean is a problem, we recommend using the
compressed-air-driven cleaning system with the CH cleaning head
(see section 5.5 REPLACEMENT PARTS AND ACCESSORIES).
4.2 Function check and user calibration
4.2.1 General information
Factory calibration The FDO 700 IQ (SW) is factory calibrated. In the recommended
application (see section 1.3 RECOMMENDED FIELDS OF APPLICATION), the
measuring characteristics of the sensor cap remain stable for the
specified service life. Thus, a user calibration is not usually required.
When does a function
check or user calibration
make sense?
A function check or user calibration can be useful in the following
special cases:
zIf the measured values appear to be implausible and it is assumed
that the service life of the sensor cap is over
zRoutinely within the framework of the company quality assurance.
Check or calibration
medium Select one of the following two variants depending on the air temperature at the calibration site:
zWith air temperatures over 5 °C, the function check and user
calibration ideally take place in water vapor-saturated air. To do so,
position the sensor approx. 2 cm above a water surface, for example
in a narrow bucket or similar container with water. The membrane
must be clean and dry for this.

Measuring / Operation FDO 700 IQ (SW)
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zWith air temperatures under 5 °C we recommend performing the
function check and user calibration not in air but in air-saturated
water that has a higher temperature. You obtain air-saturated water
by pouring water several times in and out of two vessels so that it
sparkles.
4.2.2 Function check
A function check is the simplest way to determine whether the sensor
needs to be cleaned or user-calibrated.
Principle The function check can either be done in water vapor-saturated
air or in air-saturated water (see CHECK OR CALIBRATION MEDIUM on
page 4-1).
The function check is carried out in the Saturation measuring mode.
Note
Please note that when switching to the Saturation measuring mode,
information on linked outputs is lost.
Steps
2cm
1Pull the sensor out of the sample.
2 Immerse the sensor in the function check or calibration
medium (water vapor-saturated air or air-saturated water, see
section 4.2.1).
3Open the setting table and set the measuring mode, Saturation
(unit %) (see section 3.5).
4 Switch to the measured value display with m.
5Wait for at least 15 minutes so the temperatures of the sensor
and environment can adjust to each other. Great temperature
differences may require longer adjustment times.
6 Read the measured value. Evaluate the measured value as
described below.