Xylem YSI ViSolid 700 IQ User manual

OPERATING MANUAL
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SensoLyt®700 IQ H
IQ SENSORNET - pH/ORP SENSOR
FOR CLASS I DIVISION 2 APPLICATIONS

SensoLyt®700 IQ H
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Contact YSI
1725 Brannum Lane
Yellow Springs, OH 45387 USA
Tel: [phone]
800-765-4974
Email: [email protected]
Internet: www.ysi.com
Copyright © 2020 Xylem Inc.
For the most recent version of the manual, please visit
www.ysi.com.

SensoLyt®700 IQ H Contents
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SensoLyt®700 IQ H - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 How to use this component operating manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Structure of the SensoLyt®700 IQ H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Recommended fields of application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.1 Hazard warnings in this operating manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.2 Safety information on the product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.3 Further documents providing safety information . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Safe operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2.2 Requirements for safe operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2.3 Unauthorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Hazardous location use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Commissioning / Getting the sensor ready for measuring . . . . . . . . . . . . . . . . . . . . . . . . 12
3.4 Setting table for the SensoLyt®700 IQ H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 Measurement / operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.1 General information on calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.2 Calibrating with CAL TEC AUTO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.3 Calibrating with CAL CON 2P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2.4 Calibrating with CAL CON 1P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2.5 Calibration result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.2.6 Calibration history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2.7 Reactivating a valid calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Maintenance and changing the electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 General maintenance instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2 Replacing the electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6 Replacement parts and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1 Combination electrodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2 General accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Contents SensoLyt®700 IQ H
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7 What to do if ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
8.1 Measuring characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.2 Application characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.3 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.4 Instrument safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.4.1 General instrument safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.4.2 Hazardous location ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.5 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9 Indexes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.1 Explanation of the messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.1.1 Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.1.2 Informative messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.2 Status info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10.1 Ordering & Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10.2 Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

SensoLyt®700 IQ H Overview
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1Overview
1.1 How to use this component operating manual
Structure of the
IQ SENSORNET operating
manual
Fig. 1-1 Structure of the IQ SENSORNET operating manual
The IQ SENSORNET operating manual has a modular structure like the
IQ SENSORNET itself. It consists of a system operating manual and the
operating manuals of all the components used.
Please file this component operating manual into the ring binder of the
system operating manual.
IQ Sensor Net Operating Manual
System
Operating
Manual
(Ring Binder)
IQ Sensor
Operating
Manual
MIQ Module
Operating
Manual
MIQ Terminal
Operating
Manual
Component Operating Manuals

Overview SensoLyt®700 IQ H
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1.2 Structure of the SensoLyt®700 IQ H
Fig. 1-2 Structure of the pH/ORP sensor (Example SensoLyt®700 IQ H)
Monitoring glass
breakage
The sensor is equipped with a SensCheck function for monitoring glass
breakage.
1.3 Recommended fields of application
Stationary measurements in water/wastewater applications in Class I
Division 2 hazardous locations.
In conjunction with the SensoLyt SEA(-HP), SensoLyt DWA and
SensoLyt ECA pH combination electrodes as well as the SensoLyt
PtA ORP combination electrode, the SensoLyt®700 IQ H pH/ORP
armature is suitable for stationary pH or ORP measurement in the
following fields:
1Protective hood
2Temperature sensor
3Combination electrode (not contained in the scope of
delivery)
4Electrode receptacle
5Sensor shaft
The pH combination electrodes that can be used are avail-
able as accessories (see chapter 6 REPLACEMENT PARTS
AND ACCESSORIES).
12345

SensoLyt®700 IQ H Safety
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2 Safety
2.1 Safety information
2.1.1 Hazard warnings in this operating manual
This operating manual provides important information on the safe oper-
ation of the product. Read this operating manual thoroughly and make
yourself familiar with the product before putting it into operation or
working with it. The operating manual must be kept in the vicinity of the
product so you can always find the information you need.
The hazard warnings are defined for the following levels of danger:
2.1.2 Safety information on the product
Note all labels, information signs and safety symbols on the product.
2.1.3 Further documents providing safety information
The following documents provide additional information, which you
should observe for your safety when working with the measuring sys-
GEFAHR
GEFAHR indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
WARNUNG
WARNUNG indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury.
VORSICHT
VORSICHT indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury.
ACHTUNG
ACHTUNG is used to address practices not related to
personal injury.

Safety SensoLyt®700 IQ H
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tem:
Operating manuals of other components of the measuring system
(Power supply units, controllers, accessories)
Safety datasheets of calibration and maintenance equipment (e.g.
cleaning solutions).
2.2 Safe operation
2.2.1 Authorized use
The authorized use of the SensoLyt®700 IQ H consists of its use as a
sensor in the IQ SENSORNET.Only the operation and running of the
sensor according to the instructions and technical specifications given
in this operating manual is authorized (see chapter 8 TECHNICAL DATA).
Any other use is considered unauthorized.
2.2.2 Requirements for safe operation
Note the following points for safe operation:
The product may only be operated according to the authorized use
specified above.
The product may only be supplied with power by the energy sources
mentioned in this operating manual.
The product may only be operated under the environmental condi-
tions mentioned in this operating manual.
The product may not be opened.
2.2.3 Unauthorized use
The product must not be put into operation if:
it is visibly damaged (e.g. after being transported)
it was stored under adverse conditions for a lengthy period of time
(storing conditions, see chapter 8 TECHNICAL DATA).

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2.3 Hazardous location use
Rated sensor models The following sensor model is rated for hazardous location use:
SensoLyt®700 IQ H (YSI-Order No. 207070Y)
Hazardous location rated sensors are identified by the name plate with
the rating details engraved on the sensor shaft:
Name plate of a Hazloc
sensor (example)
GEFAHR
Explosion hazard.
Only hazardous location rated sensor models
("Hazloc Sensor") must be used in hazardous
locations. Read the name plate on the sensor shaft
and verify that the sensor is rated for your specific
application.
GEFAHR
Explosion hazard.
The associated apparatus MIQ/BB1 (YSI part no.
207001Y) has to be used for connection. Refer to the
following documents for proper installation:
Control drawing, YSI document no. 28123
(see MIQ/BB1 operating manual)
MIQ/BB1 operating manual
All applicable electrical code regulations.
GEFAHR
Explosion hazard.
This product does not meet the requirements of the
directive 94/9/EC (ATEX).
SensoLyt® 700 IQ H
Hazloc Sensor
Rated: Class I Division 2 Groups A, B, C, D, T6
Class I Zone 2 Group IIC T6
0°C ≤ Ta ≤ +60°C
14...24 V DC/ 0,2 W
Control Drawing NO 28123
CONFORMS TO
UL 61010-1
UL 121201
CERTIFIED TO
CAN/CSA C22.2 # 61010-1
CAN/CSA C22.2 # 213

Commissioning SensoLyt®700 IQ H
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3 Commissioning
3.1 Scope of delivery
SensoLyt®700 IQ H
The sensor is equipped with a protective hood and protective caps
Operating manual.
3.2 Installation
Safety guidelines for
installation in a
hazardous location
Connection cable A sensor connection cable of the SACIQ type is required to connect the
sensor. The cable is available in different lengths.
Are the plug
connections dry? Before connecting the sensor and sensor connection cable, please
make sure that the plug connections are dry. If moisture gets into the
plug connections, first dry the plug connections (dab them dry or blow
GEFAHR
Explosion hazard.
Only hazardous location rated sensor models
("Hazloc Sensor") must be used in hazardous
locations. Verify the rating on the product name
plate on the sensor shaft.
The associated apparatus MIQ/BB1 (YSI part no.
207001Y) has to be used for connection. Refer to the
following documents for proper installation:
Control drawing, YSI document no. 28123
(see MIQ/BB1 operating manual)
MIQ/BB1 operating manual
All applicable electrical code regulations.
GEFAHR
Explosion hazard.
For hazardous location use only the cable types list-
ed in the control drawing must be used.
How to connect the SACIQ sensor connection cable to the
terminal strip of a MIQ module is described in chapter 3
INSTALLATION of the IQ SENSORNET system operating man-
ual.

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them dry using compressed air).
NOTE
The pH/ORP sensor SensoLyt®700 IQ H may only be submersed in
conjunction with a mounted combination electrode. When changing the
electrode, avoid the penetration of moisture into the pH/ORP sensor,
as the sensor could otherwise be destroyed. Which electrodes can be
used together with the pH/ORP sensor SensoLyt®700 IQ H is given in
section 6.1 COMBINATION ELECTRODES.
Are the plug
connections dry?
Before connecting the sensor and sensor connection cable, please
make sure the plug connections are dry. If moisture gets into the plug
connections, first dry the plug connections (dab them dry or blow them
dry using compressed air).
Connecting the sensor
to the sensor
connection cable
Do not suspend the sensor on the sensor connection cable.
Use an armature or electrode holder.
Do not suspend the sensor on the sensor connection cable.
Use a sensor holder or armature. Information on this and
other IQ SENSORNET accessories is given in the YSI cata-
log and on the Internet.
1 Take the protective caps off the plug connections of the sensor
and the SACIQ sensor connection cable and keep them safe.
2 Plug the socket of the SACIQ sensor connection cable onto the
plug head connector of the sensor. At the same time, rotate the
socket so that the pin in the plug head connector (1) clicks into
one of the two holes in the jack.
3 Then, screw the coupling ring (2) of the sensor connection
cable onto the sensor up to the stop.

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3.3 Commissioning / Getting the sensor ready for mea-
suring
Mounting the electrode
Fig. 3-1 Connecting the sensor
A KCI-filled plastic cap is mounted on the tip of the combi-
nation electrode to keep the electrode active during storage
(or during longer pauses in measuring). The cap must be
removed for measuring.
SACIQ
1
2
1 Unscrew the protective hood from the sensor.
2 Pull off the blind plug from the plug head socket of the sensor.

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3 Screw the protective cap off the plug head connector of the
electrode.
4 Screw the electrode into the plug head socket of the sensor.
5 Push the unit into the sensor up to the stop.

Commissioning SensoLyt®700 IQ H
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3.4 Setting table for the SensoLyt®700 IQ H
Carrying out settings Using <S>, switch from the measured value display to the main menu
of the settings. Then navigate to the setting menu (setting table) of the
sensor.The exact procedure is given in the relevant IQ SENSORNET
system operating manual.
ACHTUNG
Push the connected electrode into the sensor
right up to the stop so that the connection is
watertight. Leakiness can cause the sensor to be
destroyed.
6 For measuring, pull the KCI-filled plastic cap off the combina-
tion electrode.
7 Screw the protective hood onto the sensor.
8 If required, assign a user-defined name to the sensor (see rel-
evant IQ SENSORNET system operating manual).
9 Set up the sensor (see section 3.4).
10 Calibrate the sensor (see section 4.2).

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Setting Selection/values Explanation
Measuring mode mV
pH
Unit of the measured value in the measured
value display.
Temperature mode °C
°F
Unit of the temperature measured value
(Celsius, Fahrenheit).
Calibration proced.
(only with measuring
mode pH)
CAL TEC AUTO Simplified 2-point calibration, with any
two different YSI Technical buffer solu-
tions. The nominal values of the buffer
solutions are stored in the sensor. The
nominal values do not have to be entered
manually.
CAL CON 2P 2-point calibration with the following buf-
fer solutions:
1) pH 7.0 ± 0.5
2) any pH value
The nominal values of the buffer solu-
tions have to be entered
CAL CON 1P 1-point calibration with any one buffer
solution. The nominal value of the buffer
solution has to be entered.
Calibration valid Displays and specifies which calibration
data the measured value calculation will be
based on. The active calibration is displayed
in the calibration history (see section 4.2.6).
valid indicates that a valid calibration is
available. The value cannot be changed.
invalid invalid is displayed if the last calibration is
invalid and the sensor is blocked for mea-
surement.
In this case you can change the value to last
valid, provided there is a valid calibration
stored in the sensor.
last valid This is used to activate with the next exit
from the setting table with Save and quit the
last valid calibration stored in the sensor.
Next time the setting table is opened, valid is
displayed.
ORP shift
(only with measuring
mode mV)
-100 mV ... +100 mV Here you can set the ORP zero point.

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Temp. adjustment -1.5 K ... +1.5 K The temperature compensation enables the
adjusting of the temperature sensor to a ref-
erence temperature measurement (offset-
ting the zero point by ±1.5 K).
Notes:
Please position the sensor in a container
with a least 2 l water, because of the ther-
mal capacity of the sensor.
Stirring occasionally, leave the sensor in
this container for at least 15 minutes, if
the temperature difference between the
water and sensor is > 10 K, for at least
one hour, then carry out the adjustment.
Save and quit The settings are stored.
The display switches to the next higher lev-
el.
Quit The settings are not stored.
The display switches to the next higher lev-
el.
Setting Selection/values Explanation

SensoLyt®700 IQ H Measurement / operation
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4 Measurement / operation
4.1 Measuring
4.2 Calibration
4.2.1 General information on calibration
Why calibrate? During the operation of a pH electrode, the slope and asymmetry of the
electrode change with time. The calibration procedure determines the
current slope and asymmetry of the electrode.
When to calibrate? Calibrate before measuring and at regular intervals (depending on the
application).
Calibration procedures The calibration procedure CAL TEC AUTO enables the fully automatic
calibration with YSI Technical buffer solutions. Order information on
YSI Technical buffer solutions is provided in chapter 6 REPLACEMENT
PARTS AND ACCESSORIES.
The calibration procedure CAL CON 2P enables the conventional 2-
point calibration with two different buffers (first buffer solution pH 7.0 ±
0.5; second buffer solution: arbitrary).
The calibration procedure CAL CON 1P enables the conventional
single-point calibration with any one buffer.
Calibration record /
calibration history
The result of a calibration procedure is stored in the calibration record
and calibration history and can be viewed afterwards (see relevant
IQ SENSORNET system operating manual).
WARNUNG
Chemical or biological hazard.
Contact with the sample can be harmful to the user.
Depending on the type of sample, suitable protective
measures must be taken (protective clothing, gog-
gles, etc.).
Calibrate the combination electrode with the sensor and the
measuring system prior to measuring and at regular inter-
vals (depending on the application).
Please pay attention to:
the minimum immersion depth of the sensor (> 10 cm)
the measuring range of the electrode used (see operat-
ing manual of the electrode).

Measurement / operation SensoLyt®700 IQ H
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Maintenance condition During the calibration procedure the sensor is in the so-called
maintenance condition. All linked outputs remain in their current status.
After the calibration procedure has been finished the maintenance
condition has to be switched off manually. For detailed information on
the maintenance condition please refer to the relevant IQ SENSORNET
system operating manual.
General course of a
calibration on the
IQ SENSORNET
In general, a calibration procedure is carried out as follows on the
IQ SENSORNET. For system-specific details please refer to the relevant
IQ SENSORNET system operating manual.
4.2.2 Calibrating with CAL TEC AUTO
Display indications when calibrating with CAL TEC AUTO
Before starting, make sure that the correct calibration pro-
cedure is set (see section 3.4 SETTING TABLE FOR THE
SENSOLYT®700 IQ H).
1 Switch to the measured value display with <M> and select the
sensor SensoLyt®700 IQ H.
2 Call up calibration with <C>.
The maintenance condition of the sensor is switched on in the
next step. A message on this appears on the display.
3 Confirm the message with <OK>.
The maintenance condition is active.
The menu-guided calibration routine is started.
Follow the instructions on the display.
After the calibration routine is finished, the measured value dis-
play appears again (the measured value flashes because the
sensor is still in the maintenance condition).
4 If the calibration was successful, bring the sensor into the mea-
suring position.
5 Wait for a stable measured value.
6 Switch off the maintenance condition.
Display Explanation
* Have any two technical buffer
solutions ready.
You can use two different YSI
Technical buffer solutions for this.
Confirm with <OK>.

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4.2.3 Calibrating with CAL CON 2P
Display indications during 2-point calibration with CAL CON 2P
* Rinse the sensor.
* Immerse the sensor in the first
buffer solution.
* Wait for a stable measured
value.
Follow the instructions on the dis-
play. As soon as the measured
value is stable, the next display
indication appears.
* Rinse the sensor.
* Immerse the sensor in the sec-
ond buffer solution.
* Wait for a stable measured
value.
Follow the instructions on the dis-
play. As soon as the measured
value is stable, the next display
indication appears.
Successfully calibrated.
End of the CAL_TEC_AUTO cal-
ibration.
The values determined for Slope
and Asymmetry potential are dis-
played.
Calibration is finished.
Confirm with <OK>.
The display returns to the mea-
sured value display.
Display Explanation
* Have buffer pH 7,0 ± 0,5 and any
second buffer solution ready.
For this calibration procedure,
use two buffer solutions whose
pH value at the current tempera-
ture is known:
– First buffer solution
pH 7.0 ± 0.5
– Second buffer solution: arbi-
trary
* Rinse the sensor.
* Immerse the sensor in the first
buffer solution pH 7,0 ± 0,5.
* Wait for a stable measured
value.
Follow the instructions on the
display. As soon as the mea-
sured value is stable, the next
display indication appears.
* Enter the pH value of the first
buffer solution.
Confirm with <OK>.
Enter the nominal pH value of
the first buffer solution according
to the displayed temperature
with < > and confirm with
<OK>.
Display Explanation

Measurement / operation SensoLyt®700 IQ H
20 ba76206e02 12/2020
4.2.4 Calibrating with CAL CON 1P
Display indications during 1-point calibration with CAL CON 1P
* Rinse the sensor.
* Immerse the sensor in the sec-
ond buffer solution.
* Wait for a stable measured
value.
Follow the instructions on the
display. As soon as the mea-
sured value is stable, the next
display indication appears.
* Enter the pH value of the second
buffer solution.
Confirm with <OK>.
Enter the nominal pH value of
the second buffer solution
according to the displayed tem-
perature with < > and
confirm with <OK>.
Successfully calibrated.
End of the CAL_CON_2P calibra-
tion.
The values determined for Slope
and Asymmetry potential are dis-
played.
Calibration is finished.
Confirm with <OK>.
The display returns to the mea-
sured value display.
Display Explanation
* Have any buffer solution ready. For this you can use any one buf-
fer solution if its pH value at the
current temperature is known.
The calibration will be the more
exact the nearer the pH value of
the buffer solution is to that of the
test sample.
* Rinse the sensor.
* Immerse the sensor in the buffer
solution.
* Wait for a stable measured
value.
Follow the instructions on the
display. As soon as the mea-
sured value is stable, the next
display indication appears.
* Enter the pH value of the buffer
solution.
Confirm with <OK>.
Enter the nominal pH value of
the buffer solution according to
the displayed temperature with
< > and confirm with
<OK>.
Display Explanation