Senect XT1 User manual
ORP Sensor XT1
MANUAL
Type
2
Type
Name of product:
SENECT®ORP Sensor XT1
Type:
ORP-1-XT1-SC
Art.-No.:
2300
Producer:
SENECT GmbH & Co. KG
An 44 –No. 11
76829 Landau / Germany
Important note:
Please read this manual carefully and store it so that you can use
it later. Read the warning and safety notes attentive.
Further information and latest software releases or documents
can be downloaded from:
www.senect.de
© SENECT GmbH & Co. KG - FW01.10
Table of contents
3
Table of contents
Type............................................................................................... 2
Table of contents........................................................................... 3
Used symbols and wording ........................................................... 4
General Security Notes.................................................................. 5
Intended use.................................................................................. 6
Getting started .............................................................................. 7
Scope of delivery ....................................................................... 7
Installation and start-up............................................................ 7
Maintenance and cleaning ............................................................ 9
Cleaning................................................................................... 10
Maintenance ........................................................................... 10
Lifetime.................................................................................... 11
Calibration ............................................................................... 12
Notes regarding the measurement of the oxidation-reduction
potenteial .................................................................................... 15
Technical Data ............................................................................. 17
Information about the correct disposal ...................................... 18
Guarantee.................................................................................... 19
Used symbols and wording
4
Used symbols and wording
DANGER!
Warning of life threatening
dangers.
WARNING!
Warning of possible life
threatening and / or severe
irreversible injuries.
ATTENTION!
Warning of possible medium
or slight injury.
ATTENTION!
Follow the notes to avoid
damage of equipment.
NOTE!
Further information for the
use of the device.
NOTE!
Further information for the
use of the device.
General Security Notes
5
General Security Notes
The ORP Sensor XT1 is an electronic sensor unit for the
measurement of the oxidation-reduction potential (ORP or
short redox-potential) of water and must be used in
combination with SENECT control units.
Since it is an electronic product the common prerequisites
for a safe instrument usage must be fulfilled. The
corresponding control unit must be operatated
with 230 V AC (~50 Hz). Ensure that all cables are
installed safely so that no obstacles for persons are
built and all. Mount all cables and electric devices
protected against direct environmental impacts
like overheating by direct sunlight and water.
Even if the products are protected against spray
water, the product´s lifetime will be elongated, if it is
mounted on a protected place. The ORP Sensor XT1 uses
24 V DC supply voltage which is therefore not of danger for
persons.
For many applications a ground fault circuit interruper
(interrupting current <= 30 mA) is required by law. Inform
yourself about the valid legislation.
Intended use
6
The operating temperature of the device must be between
0°C and +40°C. It is not allowed to modify the sensor, to open
the housing or to insert anything into the housing.
The ORP Sensor XT1 is designed to be operated by
professional users. However, it can be operated by children
of the age of at least 8 years and persons with limited
physical, sensorial or cognitive ability, if they are supervised
and trained in the usage of the instrument, so that no
dangers or threats can result of the operation.
Please store this manual. We suggest the storage a copy of
the manual in the vicinity of the device.
Technical and optical changes of this manual are subject to
alterations.
Warning: Before starting any maintenance work,
unplug all electrical devices in the water.
Intended use
With the ORP Sensor XT1, the oxidation-reduction potential
(ORP or short redox-potential) of water can be measured at
temperatures ranging from 0°C to +40°C. The range of the
Getting started
7
sensor is from -1000 mV up to +1000 mV and the resolution
of the sensor signal is 1 mV. The ORP Sensor XT1 must be
used in combination with SENECT control units. The sensor is
designed for the use in industrial aquaculture applications.
The displayed value refers to the Ag/AgCl-Electrode.
Getting started
Scope of delivery
1 x ORP Sensor XT1 Electronic interface
1 x ORP Sensor XT1 Electrode
1 x ORP Calibration-Solution (+475 mV)
1 x ORP Calibration-BNC-plug (0 mV)
1 x Manual
Note
Please check directly after delivery, that the
package is not destroyed or damaged or was
opened before. Please check also, that all parts as
listed above are included. If anything is missing or broken,
please contact us as soon as possible within 14 days.
Unfortunately, we cannot accept later information of
damage, which happened during the transport.
Installation and start-up
Getting started
8
Choose a place for the electronic interface of the
XT1 which is clean, dry and protected from direct
sunlight. Ensure that all cables are placed safely
and all regulations are fulfilled.
1. Connect the cable of the electrode with the electronic
sensor interface (BNC-plug).
2. Connect the blue marked plug of the cable with your
control unit at one of the sensor input ports. Your
SENECT control unit will automatically recognize the
sensor and starts the measurement.
3. Remove the cap of the electrode and rinse it with tab
water.
4. Pour a small amount of the calibration solution in
another vessel and dip the sensor tip into the solution
and move it gently.
If the ORP value displayed with your control unit is close to
the value of the calibration solution (±5 mV), you can directly
install the electrode. If the deviation is larger, please
calibrate the sensor (see chapter calibration)
5. Mount the electrode at the measurement location. The
electrode shaft including the active glass tip must be
submerged and placed into the water flow. The electrode
must be mounted vertical (angle > 80°).
Maintenance and cleaning
9
For the mounting of the electrode, flow through
measurements cells can be used. If the electrode shall be
placed at an open water surface, it can be mounted on a
buoy e.g. made of Styrofoam. Please consider here, that the
electrode must be in a place with low to moderate currents
to deliver correct measurement results. If the current is too
large (> 50 cm / s) the measurements are likely to be
disturbed.
Fig. 1: Mounting possibilites of the electrode.
Maintenance and cleaning
The electrode must never run dry –not during the usage and
storage. At deliver, a silicone cap filled with 3 M KCL solution
is on the electrode. If you do not use the electrode, put the
filled cap on.
Maintenance and cleaning
10
Cleaning
The active glass part of the electrode must not be
cleaned with abrasive or aggressive cleaning
agents (e.g. scouring milk). Scratches on the glass
part can damage the electrode.
However, dirt on the glass must be removed. Use therefore
a water-dipped soft paper towel and rinse the electrode with
clean water. If the contamination cannot be removed, you
can use the following cleaning agents:
For chalk or
metalhydroxide coatings:
Diluted hypochloric acid (1-3%)
For fatty or oily
contamination:
Organic solvents (e.g. ethanol) or
tenside containing solvents (e.g.
dishwashing agents)
For protein
contamination:
Pepsin in diluted hypochlorid acid
Maintenance
Under normal conditions (clean water, stable and
not extreme ORP values), a check every 14 days is
recommended, and if necessary a new calibration
must be performed.
Maintenance and cleaning
11
Since the electrode loses its salts with usage, the signal may
drift with time so that you should clean the electrode and
calibration it again.
Lifetime
All electrodes have a limited lifetime. A specific lifetime
cannot be determined since it depends on the
environmental conditions during the use e.g. temperature,
ORP, pH, etc. This may range from days to years. Therefore,
we cannot publish respectable lifetime estimates.
The storage of the electrode should be in a dry
room between -5 and +30°C and not last longer
than 6 months. The electrode must be stored in
3 M KCl solution. If the electrode felt dry, it may be
reactivated by storing it 24 h in 3 M KCl solution.
Avoid the contact to inorganic cleaning agents like
acetone or chloroform. This may damage the
membrane. Steam disinfection can also damage
the sensor.
Depending on the used firmware of your control unit,
the menu can change. Please refer therefore to the
current manual which can be found on
www.senect.de.
Maintenance and cleaning
12
Calibration
1. Unplug the electrode and plug in the BNC calibration
plug. Select in the menu „Sensor calibration / ORP /
Calibration Point 1“ and press OK or wait 120 s.
2. Remove the calibration plug and plug in the ORP
electrode.
3. Rinse the electrode under clean tab water. Dip the
electrode into a vessel containing the +475 mV
calibration solution.
Maintenance and cleaning
13
4. Select in the menu of your control unit the ORP sensor
(Sensors / Sx: ORP) and select “Sensor Calibration / ORP
/ Calibration Point 2“.
5. Select the ORP value of your calibration solution (here:
+475 mV) and stir the electrode gently until the displayed
raw signal value (in digits) is nearly constant. If it is
constant validate this calibration point by pressing OK.
Alternatively, the control units confirms this calibration
point automatically after 120 s.
Tipp: In case you work with another calibration solution, you
can change the ORP reference value by using the cursor keys.
Maintenance and cleaning
14
6. If the calibration worked select „Save calibration“.
7. Rinse the electrode with tab water again.
Your SENECT ORP Sensor XT1 is not ready to be used.
Fig. 1: Calibration curve with two calibration point.
Tipp: It is also possible to load old calibrations. There you can
also see the calibration coefficients.
The calibration should be carried out at the same
temperature like in the measured water.
Notes regarding the measurement of the oxidation-reduction
potenteial
15
Notes regarding the measurement of the
oxidation-reduction potenteial
Every delivered SENECT ORP Sensor is inspected by our
quality check with respect to perfect functioning and
calibration. Despite the high quality standards, interferences
of the sensor signal based on the measurement principle and
properties of the medium can occur.
Drift: In most cases, electro-chemical measurements
show a drift with time. Therefore, the sensors must be
recalibrated regularly to achieve best precision in the
measurements. Due to polarity effect, an enhanced drift
after starting the operation of electrodes can occure
within the first days. Please consider this in the
interpretation of the measurements.
Leakage currents: In aquaculture applications, e.g. in
ponds or tanks, are often 230 V or 380 V consumers like
pumps connected. Please pay careful attention that all
consumers meet current legislation requirements and
that there are no damaged parts, e.g. porous cables.
Insufficent insulated consumers can lead to leakage
currents, which influence ORP measurements.
Notes regarding the measurement of the oxidation-reduction
potenteial
16
The measurement of the oxidation-reduction potential is
determined by the concentration of substances, which
act as oxidating or reducing agents. In some cases, the
concentration of these substances is too low to achieve
reliable results.
Technical Data
17
Technical Data
Dimensions Electrode:
Ø 12 mm, Length: 120 mm
Cable length:
5 m + 2 m
Supply voltage:
24 V DC
Power consumption:
<< 1 W
Temperature range:
0° to 40 °C
Max. Pressure:
6 bar
Range:
-1000 mV to +1000 mV
Precision:
< ±2,5% FS
Response time:
T90 < 30s
Ingress protection:
IP68 (Electrode), IP67
(Rest)
Information about the correct disposal
18
Information about the correct disposal
19
Information about the correct disposal
Your device is well packed at delivery. Please
dispose the packaging material accordingly to the
regulations in your country.
Do not throw the product in the casual litter bin. Make sure
you are informed about the local disposal regulations and
dispose your product accordingly. Alternatively, you can also
send the product back to the producer.
The SENECT GmbH & Co. KG is member of the Stiftung
Elektro-Altgeräte Register and the products are registered
(WEEE-Reg.-Nr.: DE37193510).
Guarantee
Please check at delivery of your device, that all
parts are delivered completely and that they
function correctly. In case of any claims, contact us
6341 - 95 95 210). Please describe your claim as detailed as
possible so that we can provide a solution as fast as possible.
The product has a guarantee of 1 year and a warranty of 2
years. Furthermore, the § 377 HBG (German law) is valid.
This manual suits for next models
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