SCHOTT 9009/6. Manuel utilisateur
ba22207e08 07/2011
9009/6.
9009/6.-ID
Operating manual
Dissolved oxygen sensor
9009/6.
18 ba22207e08 07/2011
Copyright ©2011, SI Analytics GmbH
Reprinting - even as excerpts - is only allowed with the explicit written
authorization of SI Analytics GmbH, Mainz.
Printed in Germany.
9009/6.(-ID) Contents
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9009/6.(-ID) - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4 Measuring / Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Maintenance, cleaning, replacement . . . . . . . . . . . . . . . . . . 23
5.1 General maintenance instructions . . . . . . . . . . . . . . . . . . . . . . 23
5.2 Exterior cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.3 Changing the electrolyte and membrane head . . . . . . . . . . . . 24
5.4 Cleaning the electrodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.5 Checking the sensor for freedom from zero-current . . . . . . . . 28
5.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8 Wear parts and accessories . . . . . . . . . . . . . . . . . . . . . . . . . 32
Overview 9009/6.(-ID)
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1Overview
Construction
Automatic sensor
recognition
In the plug connector of the 9009/6.-ID sensor, data is stored for the automat-
ic sensor recognition function. Among other, this data includes the sensor
type and series number. Besides, the calibration data is written in the sensor
with every calibration procedure. When the sensor is connected, the data is
called up by the meter and used for measurement and measured value doc-
umentation. The correct data is always used automatically if the sensor is op-
erated with several meters because the data is stored in the sensor.
To be able to use the automatic sensor recognition function, a meter is
required that supports the function. More information on the automatic sensor
recognition function is given in the operating manual of the meter.
Recommended
fields of
application
On site measurements in rivers, lakes and wastewater
Applications in water laboratories
BOD measurements
1Membrane cap (filled with electrolyte solution)
2Shaft
3Connection head
4Gold working electrode (cathode)
5Insulator
6Lead counter electrode (anode)
7Ventilation area
8Temperature sensor and auxiliary electrode
213
456 87
9009/6.(-ID) Safety
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2Safety
This operating manual contains special instructions that must be followed
during the operation of the Dissolved Oxygen (D.O.) sensor.
Always keep this operating manual in the vicinity of the sensor.
Special user
qualifications
The membrane cap of the D. O. sensor is filled with a small amount of an
alkaline electrolyte solution. All maintenance work that requires dealing with
the electrolyte solution must only be carried out by persons who are familiar
with the safe handling of chemicals.
General safety
instructions
The individual chapters of this operating manual use safety labels like the one
below to indicate danger:
Caution
indicates instructions that must be followed precisely in order to avoid
slight injuries or damage to the instrument or the environment.
3 Commissioning
Scope of delivery D. O. sensor 9009/6., filled with electrolyte solution and operable
3 exchange membrane caps
Calibration and storage vessel, OxiCal®-SL
Operating manual
Note
The membrane cap that is mounted on the sensor for delivery serves mainly
as a transport protection. Depending on the duration of the transport and stor-
age period, it may have a shortened operational lifetime. If the measuring
system cannot be calibrated (error message on the instrument), please pro-
ceed according to section REPLACING THE ELECTROLYTE SOLUTION AND MEM-
BRANE CAP.
Getting the sensor
ready for
measuring
Connect the sensor to the measuring instrument. The sensor is immediately
ready to measure. It is not necessary to polarize the sensor.
Measuring / Operation 9009/6.(-ID)
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4 Measuring / Operation
4.1 Calibration
Note
For calibration, please refer to the operating manual of the measuring instru-
ment.
4.2 Measuring
Please note the required minimum immersion depth and minimum flow (see
chapter 7 TECHNICAL DATA).
The minimum flow can be provided in different ways, e. g.:
The flow velocity of the water to be measured is sufficient (aeration tank,
water pipe, stream)
Slowly pull the sensor through the water by hand (lake, container), or
Use a flow aid, e. g. a magnetic stirrer with stirring device (see chapter 8
WEAR PARTS AND ACCESSORIES)
4.3 Storage
Always store the sensor in the calibration vessel at a temperature of 0 to
+50 °C. Make sure that the sponge in the calibration vessel is always moist.
Calibration vessel,
OxiCal®-SL
Moisten the sponge:
Remove the cap (1).
Take out the sponge (2), wet it, then slightly squeeze it out.
Reinsert the sponge and close the calibration vessel with the cap.
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9009/6.(-ID) Maintenance, cleaning, replacement
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5 Maintenance, cleaning, replacement
5.1 General maintenance instructions
For your safety When dealing with the OX 920 electrolyte solution, observe the following
safety instructions:
Caution
The OX 920 electrolyte solution irritates eyes and skin. When dealing
with the OX 920 electrolyte solution, observe the following points:
During working activities, always wear suitable protective gloves
and protective goggles/face shield.
If it comes into contact with the skin, rinse thoroughly with water and
immediately change contaminated clothing.
If it comes into contact with the eyes, rinse thoroughly with water
and consult a doctor.
Follow the safety datasheet.
Caution
Before all maintenance activities, disconnect the sensor from the
instrument.
Note
Information on how to order wear parts and maintenance accessories can be
found in chapter 8 WEAR PARTS AND ACCESSORIES.
5.2 Exterior cleaning
Cleaning agents
After cleaning, thoroughly rinse with deionized water and recalibrate if
necessary.
Contamination Cleaning procedures
Lime sediments Immerse in acetic acid for 1 minute (volume
share = 20 %)
Fat/oil Clean with warm water that contains wash-
ing-up liquid
Maintenance, cleaning, replacement 9009/6.(-ID)
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5.3 Changing the electrolyte and membrane head
Caution
Before starting to work with the sensor, please note the GENERAL
MAINTENANCE INSTRUCTIONS on page 23.
General
information
SI Analytics delivers the sensor ready to operate (see section 3). The elec-
trolyte solution and the membrane head must only be replaced if:
a calibration error occurs and the membrane is heavily contaminated
the membrane is damaged
the electrolyte solution is exhausted
in case of a leak message by the measuring instrument.
Changing the electrolyte solution and the membrane head
Unscrew the membrane
head.
Caution: Electrolyte solution!
For disposal of the membrane
head and electrolyte solution,
see section 5.6.
Rinse the sensor head with
deionized water.
Carefully rub and dry the
counter electrode with a lint-
free paper towel.
Immerse the sensor head in-
cluding the counter electrode
in OX 921 cleaning solution.
Allow to react for 1 to 3 min-
utes.
Thoroughly rinse the sensor
head with deionized water.
Water the counter electrode in
deionized water for at least
10 minutes.
OX 921
H O
2
9009/6.(-ID) Maintenance, cleaning, replacement
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Carefully shake off the drops
of water.
Fill a new membrane cap with
OX 920 electrolyte solution.
Remove any air bubbles by
carefully tapping the mem-
brane head. Additionally, you
can prevent air bubbles by
throwing the first fill away and
refilling the membrane head.
Thoroughly rinse the sensor
head with electrolyte solution.
Hold the sensor inclined and
screw on the membrane head
fingertight using a paper tow-
el. Excess electrolyte solution
is forced out of the ventilation
area.
Check the filling:
Inspect the face surface. No
air bubbles may be present
within the dashed circle
(approx. the black area). Air
bubbles outside this area do
not interfere.
Note
For measurements under high pressure the filling must be com-
pletely free of air bubbles.
Readiness to measure After approx. 30 to 50 minutes, the sensor is ready for operation.
Subsequently calibrate the sensor.
Note
If you want to measure very low oxygen concentrations (< 0.5 %
saturation), we recommend to let the sensor rest overnight and
then calibrate it.
OX 920
OX 920
4mm
Maintenance, cleaning, replacement 9009/6.(-ID)
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5.4 Cleaning the electrodes
Caution
Before starting to work with the sensor, please note the GENERAL
MAINTENANCE INSTRUCTIONS on page 23.
General
information
Cleaning is only required in cases of slopes that are too small or too large
(sensor cannot be calibrated) that cannot be resolved by changing the mem-
brane head and electrolyte solution.
Cleaning the electrodes
Unscrew the membrane
head.
Caution: Electrolyte solution!
For disposal of the membrane
head and electrolyte solution,
see section 5.6.
Rinse the sensor head with
deionized water.
Using the rough side of the
wet SF 300 polishing strip,
polish off any contamination
from the gold working elec-
trode using light pressure.
Caution: Do not use any con-
ventional sandpaper or glass-
fiber brushes.
Rinse the sensor head with
deionized water.
Wipe the counter electrode
with a lint-free paper towel
and carefully remove any
loose white deposits.
Immerse the sensor head in-
cluding the counter electrode
in OX 921 cleaning solution.
Allow to react for 1 to 3 min-
utes.
SF 300
OX 921
Ce manuel convient aux modèles suivants
1
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