wtw SensoLyt ORP 900-P User manual

OPERATING MANUAL
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SensoLyt®ORP 900-P
IDS ORP ELECTRODE
OPERATING MANUAL

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

SensoLyt®ORP 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. The data is recalled by the meter when the sensor is
connected and is used for measurement and for measured value documen-
tation.
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
(accessory)
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.

General information SensoLyt®ORP 900-P
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2 Commissioning, measuring, calibration
2.1 Opening and closing the IDS plug connection
This section only applies to variants with IDS plug (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®ORP 900-P General information
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2.2 Commissioning
Scope of delivery ORP electrodeSensoLyt®ORP 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 sensor to the meter.
The sensor is immediately ready to measure.
Types of connection:
– via a connecting cable (accessory) to a free IDS connector on the meter
or
– wireless via an IDS WLM-S adapter (accessory) to a WLM-capable
meter
or
– via an IDS sensor slot of a multi parameter probe
(connected to a meter)
Accessories for the connection of the SensoLyt®ORP 900-P-P sensor to
the meter are listed in chapter 7 WEAR PARTS AND ACCESSORIES.
To open and close the IDS plug-in position please note the section 2.1
OPENING AND CLOSING THE PLUG CONNECTION.
2.3 Calibrating, measuring
Conversion
to standard
hydrogen
electrode
UH= UMeas + URef
URef depends on the reference system and temperature and can be taken
from the following table (see also DIN 38404-6 for the system Ag/AgCl/
saturated KCl):
Please keep the watering cap. It is required for the electrode
to be stored. Always keep the watering cap clean.
Remove the watering cap for calibrating and measuring. More
detailed information is given in the operating manual of the meter.
with: UH= ORP, referring to the normal hydrogen electrode
UMeas = Measured ORP
URef = Voltage of the reference system compared to the normal
hydrogen electrode

Aging SensoLyt®ORP 900-P
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3Aging
ORP electrodes are consumables. Every ORP electrode undergoes a natural
aging process. Extreme operating conditions 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.
4Storage
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.
T (°C) URef [mV] T (°C) URef [mV]
SensoLyt®ORP 900-P SensoLyt®ORP 900-P
0 +221 35 +187
5 +216 40 +181
10 +212 45 +176
15 +207 50 +171
20 +202 55 +165
25 +197 60 +160
30 +192
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.

SensoLyt®ORP 900-P Cleaning
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5 Cleaning
Cleaning
procedures
6 Technical data
Contamination Cleaning
Gross contamination on the junction Carefully brush off contamination
under running water using a soft
toothbrush
Fats, oils, protein-containing sedi-
ments and similar substances
Remove with household washing-
up liquid
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
General data ORP electrode Platinum ring
Reference electrolyte Polymer electrolyte
Junction 2-hole junction
Shunt conduction element Ag/AgCl
Temperature sensor Integrated NTC 30 (30 kat 25 °C / 77 °F)
Measurement and
application
characteristics
ORP measuring range -1250.0 ... +1250.0 mV
Minimum immersion depth 25 mm
Allowed temperature range 0 ... 60 °C (32 ... 140 °F)
Precision of the temperature
sensor
± 0.2 K
Response time t99 of the
temperature sensor
< 130 s
Allowed pH range of the
measuring medium
4 ... 12
Typical application Field

Wear parts and accessories SensoLyt®ORP 900-P
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The electrodes meet the requirements according to article 3(3) of the direc-
tive 97/23/EC ("pressure equipment directive").
7 Wear parts and accessories
Accuracy of the
IDS measuring
technique
Measured parameter Accuracy (± 1 digit)
U [mV] ± 0.2
T [°C] ± 0.1
Pressure range at
temperature
Temperatureallowed 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)
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
ORP buffer solution (250 ml) RH 28 109 740
Connection cable
SensoLyt®ORP
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

SensoLyt®ORP 900-P Disposal
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8 Disposal
At the end of its operational lifetime, the electrode must be returned to the
disposal or return system statutory in your country (electronic waste). If you
have any questions,
please contact your supplier.
Radio connection
SensoLyt®ORP
900-P - meter
Description Model Order no.
WLM capable IDS meter
+ radio module for IDS meter
see Internet
Radio module for plug head sensor IDS WLM-S 108 141
General purpose
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

Disposal SensoLyt®ORP 900-P
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82362 Weilheim
Germany
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