SENTRON ISFET Montageanleitung
www.sentron.nl
Full manual
Sentron
pH probe
Usage, cleaning and storage
instructions for Sentron
ISFET pH probes
Contents
1
GENERAL 3
Warning 4
Notes before use 4
Operating tips 5
PREPARE 7
Unpack the box 8
Gather the following components 9
Plug and screw the probe parts together 10
Remove residues 11
Download the app 11
Charge the probe 12
GET STARTED 13
Activate your device 14
No registered devices yet? 14
Registered devices? 14
Connected devices 15
Start your measurements 16
Live parameter values 16
Battery status of devices 16
Calibration 16
Calibration status of devices 16
pH calibration 17
Temperature calibration 18
Add or delete devices 18
Standby mode of devices 18
Reset your device 19
Restart your device 19
Device settings 20
Calibration information 20
Probe settings 20
Transmitter settings 20
Firmware update 20
Disconnect / Delete 20
Probespecicinformation 21
CupFET 21
MicroFET 21
ConeFET 21
LanceFET 21
USE 22
Rinse probe 23
Select probe 24
Sample 24
Save sample set 25
Export sample 25
Interval 26
Start interval 27
During interval 27
Stop interval 27
Export interval 27
History 28
Settings 29
FAQ 29
Settings 29
Advanced mode 29
Links 29
Database reset 29
Color codes of probe 30
CLEAN 31
Clean 32
REVITALIZE 33
Prepare saturated KCl 34
Clean and revitalize 35
Revive 35
STORE 36
Store for short time periods 37
Store for longer time periods 38
BUFFERS 39
Sentroncalibrationbuers 40
Twin neck bottle 40
AdvantagesofSentronpHbuertwinneckbottles 40
Note 40
SPECIFICATION 41
CONTACT 44
Delivery and return 45
Support 45
Guarantee 45
Declaration of Compliance 45
More info 45
Contact 46
Address 46
2
GENERAL
3
Warning
Do not open the probe as this may cause damage and will void the guarantee.
All information provided in this manual is applicable at the moment of publication.
Sentron holds the right to change components, functions and procedures as required.
The Sentron wireless probes allow you to perform accurate pH measurements. We advise
you to read the ‘Quick Start’ guide before use and keep this guide for future reference. We
also advise you to read this manual to learn about the probe’s maintenance and cleaning
instructions.
The Sentron pH probes are designed for pH measurements. Do not use the probes for
other applications as this may cause damage.
Notes before use
The pH-sensitive element in a Sentron pH probe is the ISFET semi-conductor sensor. This
sensing element needs to be driven by an electronic circuit that is built into the Sentron
probe transmitter. Sentron probes are robust and build to last. The pH probe nonetheless
requires periodic maintenance. This is described in this manual under ‘Clean’, ‘Revitalize’
and ‘Store’.
Do not use the probe outside the specied temperature range as this might result in
probe failure or irreversible damage to the probe.
Samples must be aqueous solutions or semi-solids and compatible with the probe’s
materials.
If information is required regarding the chemical resistance of the probe, please contact
your local dealer or Sentron.
4
5
•Clean your probe regularly during use. For cleaning instructions see this manual under
‘Clean’.
• Ensure samples or buers are well mixed to obtain correct measurement values. This
may be done by a magnetic stirrer or by stirring with the probe for at least 5 seconds.
Stop stirring and record results when the read-out is stable.
• Make sure the medium is in contact with both the ISFET sensor and the diaphragm
simultaneously.
• Make sure that the medium which is being measured, is providing a “hydrogen ion
bridge” between the ISFET and the diaphragm. Without a proper uid (or semi-solid)
connection between these both, no (stable) measurement can be performed. A good
rule of thumb is to have at least the rst 10 mm from the probe tip to be immersed
during measurements and calibrations. See also this manual under ‘Probe specic
information’.
• Buer-handling: pH 7.00 buers (phosphate-based) and pH 4.00 buers (biphtalate-
based) are less susceptible to carbon dioxide contamination than pH 10.00 buers
(borax or carbonate based). When slope errors occur, it usually indicates a failing probe
or a contaminated buer. If slope errors occur when using a pH 10.00 buer, try
calibrating with pH 7.00 and pH 4.00 buer. If a good slope is achieved, try a new bottle
of pH 10.00 buer. Buers in a convenient twin neck bottle are available from Sentron or
our dealers.
• Tris buers and samples containing proteins form impermeable layers on surfaces, and
require special attention when being used. These types of samples should be measured
quickly and the probe should be rinsed thoroughly with demineralized water between
samples. Avoid prolonged immersion in samples containing Tris or proteins. When
testing is complete, rst clean the probe with tap water and a laboratory detergent and
subsequently rinse with demineralized water.
• When testing in direct sunlight or on a bright reecting surface, please use brown,
opaque or shielded sample containers. Very bright light might inuence the
performance of the sensor.
Operating tips
• Avoid prolonged immersion in samples expected to have pH values at the ends of
the specied pH range. When prolonged exposure to very high or very low pH values
does take place, rinse the probe with neutralizing agents and distilled water when the
measurement is completed.
• Proper maintenance of a probe is important. If the probe is not cleaned properly
and regularly, probe malfunction can occur due to a polluted diaphragm or ISFET. The
cause for this pollution is usually the sample. Pollution on/or blockage of the sensor and
reference electrode diaphragm surface is the most likely cause for probe failure.
Revitalize your probe if any of the following events occur: low slope, drift, instability
of the reading, slow calibration, probe will not calibrate, pH value doesn’t change as
expected when changing samples.
• Probe wear is another cause for probe failure. Probe wear is often, but not necessarily,
preceded by a period of declining calibration slope values. Probe wear is dependent
on how the probe is used, stored. Worn probes need to be replaced.
6
PREPARE
7
Unpack the box
Charger with USB cableRing
Transmitter
The transmitter
includes the battery,
the memory for the
measurement values,
and the recognition
of the replaceable
sensor part.
The charger with USB
cable charges the
probe wirelessly.
Through the ring the
two parts of the probe
are screwed together.
Replaceable sensor part
The replaceable
sensor part includes
the sensor and
reference electrode.
It is covered with a
protective cap.
NB in this manual we show pictures of the ConeFET pH
probe. The other variants of the Sentron pH probes
work in the same manner.
The sensor is the metallic spot
at the tip of the probe (S). The
diaphragmofthegel-lled
reference electrode is the
white spot in the tip (R).
Tooth brush
The tooth brush is for
cleaning purposes.
REPLACEABLE SENSOR PART
TRANSMITTER
RING
R
S
8
Gather the following components
Mobile device
Calibration
buers
Demineralized
water
Labware
USB charger
adapter
Internet
Bluetooth
Any smartphone or tablet with Bluetooth 5.0 or higher can
be used for the Sentron application for pH measurements.
Android, iOS or Huawei, any of these apply.
ThecalibrationbuerscanbeeithertheSentronpHbuers
(recommended),DINpHbuers,NISTpHbuersorJISpH
buers.
Demineralized water (= deionized water) is required for
ushingtheprobebetweenbuersandsamples.
Distilled water is also suitable.
Beakers, tissues and a siphon with demineralized water for
ushingtheprobetiparehandyandrecommendedlabware,
especially for the calibration of the pH probes.
The USB charger adapter connects the USB cable of the
charger to the socket or 12V plug in, for example, the car.
Accesstointernet(wiormobileinternet)isrequiredto
download the Sentron app. After installation the app works
oine,unlessyouwanttoexportyourdatatothecloud.
Bluetooth is required to connect the probe. After starting an
interval, the connection can be disconnected. The probe will
store the data and download them to the app as soon as the
connection is restored.
Visit our website (www.sentron.nl/shop)
to purchase these components at Sentron.
Item Usage
9
Inhaltsverzeichnis
Andere SENTRON Messgerät Handbücher
