Xylem WTW SensoLyt 900 User manual

OPERATING MANUAL
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SensoLyt®900(-P)
IDS pH ELECTRODE WITH POLYMER ELECTROLYTE
OPERATING MANUAL

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SensoLyt®900(-P)
2
Copyright © 2017, Xylem Analytics Germany GmbH
Printed in Germany.

SensoLyt®900(-P) General information
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1 General information
Automatic sensor
recognition
The sensor electronics with the stored sensor data are in the connecting
head of the electrode. The data include, among other things, the sensor type
and series number. In addition, the calibration data are stored in the sensor
with each calibration and the calibration history is recorded (the last 10 cali-
brations). The data is recalled by the meter when the sensor is connected
and is used for measurement and for measured value documentation.
Storing the calibration data in the sensor ensures that the correct slope and
asymmetry are automatically used if the sensor is operated with different
meters. On the other hand, different calibrated sensors can be used with one
meter without the need to recalibrate.
The digital transmission technique guarantees the failure-free communica-
tion with the meter even with long connection cables. The sensor firmware
can be updated via the meter.
Armoring
A 925-P/K and
A925-P/S
(accessories)
To protect the electrode against mechanical impacts, the A 925-P/K armoring
(with plastic protective hood) or A 925-P/S (with steel protective hood) can be
installed and uninstalled as necessary. The steel model is simultaneously
used as a sinker for depth measurements.

Commissioning, measuring, calibration SensoLyt®900(-P)
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2 Commissioning, measuring, calibration
2.1 Opening and closing the IDS plug connection
This section only applies to IDS plug variants (SenTix®... -P).
Opening the plug
connection
If necessary, clean the plug connection
Open the locking device (step 1)
Use your thumb and index finger to press the clips of the connector
together, and pull the connector out of the plug (step 2).
Closing the plug
connection
Make sure that the plug connection is completely dry and clean.
Align the guidance of the connector with the groove in the plug and insert
the connector in the unlocked plug until it catches (step 3).
Close the locking device (step 4).
2
4
3
1
Plug connection
closed and locked
Guidance
Groove

SensoLyt®900(-P) Commissioning, measuring, calibration
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2.2 Commissioning
Scope of delivery ORP electrode SensoLyt®900(-P)
Operating manual
Commissioning Prepare the electrode for measuring as follows:
Remove the watering cap from the electrode tip. Possible salt deposits in
the area of the watering cap do not affect the measuring characteristics
and can easily be removed with deionized water.
Connect the electrode to a free IDS sensor plug-in position of the multi
parameter probe or to an IDS connection of the meter.
To open and close the IDS plug-in position please note the Abschnitt 2.1
OPENING AND CLOSING THE IDS PLUG CONNECTION.
Calibrate the electrode according to the operating manual of the meter
and observe the rules in the following section while doing so:
Preparing the
sensor for
measurement
2.3 Calibration and measurement: General rules
Avoid the carryover of any solution (sample or buffer solution) from one
Please keep the watering cap. It is required for the electrode to
be stored. Always keep the watering cap clean.
Connection cables in different lengths to connect the electrode to
the meter are listed in Abschnitt 7 WEAR PARTS AND ACCESSORIES.
SensoLyt®900 Connect the sensor to the meter.
The sensor is immediately ready to measure.
SensoLyt®900-P Connect the sensor to a free IDS sensor plug-in
position of the multi parameter probe or to an IDS
connection of the meter. To open and close the
IDS plug-in position please note the Abschnitt 2.1
OPENING AND CLOSING THE IDS PLUG CONNECTION.
The sensor is immediately ready to measure.
Connection cables in different lengths to connect
the SensoLyt®900-P sensor to the meter are listed
in Kapitel 7 WEAR PARTS AND ACCESSORIES.
Connect the sensor to the meter.
The sensor is immediately ready to measure.

Storage SensoLyt®900(-P)
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measurement to the next by taking the following measures:
– Shortly rinse the calibration and sample beakers with the solution the
beakers are to be filled with next.
– Between measurements, rinse the electrode with the solution that fol-
lows. Alternatively, you can also rinse the electrode with deionized
water and then carefully dab it dry.
To measure in aqueous solutions, it is recommended to immerse the elec-
trode in a vertical or slightly tilted position.
Observe the correct depth of immersion and make sure the contact
between the junction and test sample is thorough. The junction (hole junc-
tion) is in the area of the bottom end of the shaft.
For measurements in aqueous solutions, provide approximately the same
stirring conditions for measuring as for calibrating.
NOTE
Prevent contact of the pH membrane to the beaker bottom to avoid
scratches on the pH membrane.
Subsequent
calibrations
The frequency of subsequent calibrations depends on the application. The
meters provide an option where you can enter a calibration interval. After the
calibration interval has expired, the meter will automatically remind you of the
due calibration.
3Storage
During short
measuring breaks
Immerse the electrode in reference electrolyte (KCl 3 mol/L, Ag+free). Prior
to the next measurement, shortly rinse the electrode with the test sample or
deionized water.
Overnight or
longer
Put the clean electrode in the watering cap that is filled with reference elec-
trolyte (KCl 3 mol/L, Ag+free).
NOTE
Do not store the electrode dry or in deionized water.
The electrode could be permanently damaged by this.
If the liquid in the watering cap has dried up, condition the electrode in
reference electrolyte (KCl 3 mol/L, Ag+ free) for at least 24 hours.
Junction

SensoLyt®900(-P) Aging
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4 Aging
pH electrodes are consumables. Every pH electrode undergoes a natural
aging process. With aging, the responding behavior becomes slower and the
electrode slope and asymmetry change. Moreover, extreme operating condi-
tions can considerably shorten the lifetime of the electrode. These are:
Strong acids or lyes, hydrofluoric acid, organic solvents, oils, fats, bro-
mides, sulfides, iodides, proteins
High temperatures
High changes in pH and temperature.
The warranty does not cover failure caused by measuring conditions and
mechanical damage.
5 Maintenance and cleaning
Cleaning Remove water-soluble contamination by rinsing with deionized water. Other
types of contamination have to be removed as follows while the contact time
with the detergents should be kept as short as possible:
NOTE
Hydrofluoric acid, hot phosphoric acid and strong alkaline solutions
destroy the glass membrane.
After cleaning Rinse the electrode with deionized water and condition it in reference elec-
trolyte solution for at least 1 hour. Then recalibrate the electrode.
During longer storing periods, salt sediments may develop on the
watering cap. They do not affect the measuring characteristics
and can easily be removed with deionized water when the elec-
trode is put into operation again.
Contamination Cleaning procedure
Fat and oil Rinse with water containing household wash-
ing-up liquid
Lime and hydroxide deposits Rinse with citric acid (10 % by weight)

Technical data SensoLyt®900(-P)
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6 Technical data
The electrodes meet the requirements according to article 3(3) of the direc-
tive, 97/23/EC ("pressure equipment directive").
General features Reference electrolyte Polymer electrolyte, AgCl free
Junction 1-hole junction
Shunt conduction element Ag/AgCl
Temperature sensor Integrated NTC 30
(30 kat 25 °C / 77 °F)
Measurement and
application
characteristics
pH measuring range 0.000 ... 12.000
Allowed temperature range 0 ... 60 °C
Membrane resistance at
25 °C
< 500 MOhm
Typical application Field
Accuracy of the
IDS measuring
technique
Measured parameter Accuracy (± 1 digit)
pH ± 0.004
U [mV] ± 0.2
T [°C] ± 0.1
Pressure range at
temperature
Temperature allowed overpressure
0 °C (32 °F) 1000 kPa (10 bar)
20 °C (68 °F) 1000 kPa (10 bar)
30 °C (86 °F) 500 kPa (5 bar)
40 °C (104 °F) 300 kPa (3 bar)
60 °C (140 °F) 100 kPa (1 bar)
IDS plug Connection type 4-pole, watertight plug connection with lock,
reverse polarity protected
Shaft dimensions,
material
Shaft length 120 mm
Shaft diameter 12 mm
Shaft material Glass
IDS plug Synthetic materials: Glass fiber reinforced
Noryl, TPU, TPC-ET, POM, PVC, PEEK,
PBT
O-ring: FPM
Contacts gold-plated

SensoLyt®900(-P) Wear parts and accessories
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7 Wear parts and accessories
Storage With watering cap; filled with KCl 3 mol/L, Ag+free
Disposal Residual waste
Maintenance
equipment
Description Model Order no.
Reference electrolyte solution 250 ml
to fill the watering cap
(KCl 3 mol/l, Ag+-free)
KCl-250 109 705
Connection
cableSensoLyt®
900(-P) - meter
Description Model Order no.
IDS connection cable, 1.5 m AS/IDS-1.5 903 850
IDS connection cable, 3 m AS/IDS-3 903 851
IDS connection cable, 6 m AS/IDS-6 903 852
IDS connection cable, 10 m AS/IDS-10 903 853
IDS connection cable, 15 m AS/IDS-15 903 854
IDS connection cable, 20 m AS/IDS-20 903 855
IDS connection cable, 25 m AS/IDS-25 903 856
IDS connection cable, 40 m AS/IDS-40 903 857
IDS connection cable, 60 m AS/IDS-60 903 858
IDS connection cable, 100 m AS/IDS-100 903 859
General
accessories
Description Model Order no.
Blind plug for IDS plug BPO/IDS 900 908 371
Armoring without protective hood A 925-P 903 838
Armoring with plastic protective hood A 925-P/K 903 839
Armoring with steel protective hood A 925-P/S 903 840

Wear parts and accessories SensoLyt®900(-P)
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