Kobold HND-R106 User manual

Operating Instructions
for
pH-, Redox- and Temperature Portable
Measuring Instruments
Model: HND-R106

HND-R106
page 2 HND-R106 K09/0422
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 4
3.Instrument Inspection .................................................................................... 4
4.Regulation Use ............................................................................................. 4
5.Operating Principle ........................................................................................ 5
6.Electrical Connection and Maintenance Advice ............................................ 5
6.1Mains operation ................................................................................... 5
6.2When to replace battery ....................................................................... 5
6.3Temperature probe .............................................................................. 6
6.4Damaged electrode ............................................................................. 6
7.Safety Requirements ..................................................................................... 6
8.Instrument Description .................................................................................. 8
8.1Displays ............................................................................................... 8
8.2Pushbuttons ......................................................................................... 8
8.3Connections ......................................................................................... 9
8.4Pop-up clip ........................................................................................... 9
8.5Start Operation .................................................................................. 10
9.Principles of the measurements .................................................................. 11
9.1pH measurement ............................................................................... 11
9.2ORP measurement ............................................................................ 11
9.3rH measurement ................................................................................ 12
9.4pH electrode ...................................................................................... 13
9.5Calibration of pH measurement ......................................................... 14
10.Configuration ............................................................................................... 18
11.Universal output .......................................................................................... 21
11.1Serial Interface ................................................................................... 21
11.2Analog Output .................................................................................... 21
12.Input adjustment .......................................................................................... 22
13.GLP ............................................................................................................. 23
13.1Calibration interval (C.Int) .................................................................. 23
13.2Calibration storage (rEAd CAL) ......................................................... 23
14.Real Time Clock (“CLOC”) .......................................................................... 24
15.Accuracy Check / Adjustment Service ........................................................ 24
16.Error and System Messages ....................................................................... 25
17.Technical Information .................................................................................. 26
18.Preparation of ph Buffer Solution ................................................................ 27
19.Order Codes ............................................................................................... 29
19.1pH-value for rH-measurement ........................................................... 29
19.2Accessories ....................................................................................... 30
20.EU Declaration of Conformance ................................................................. 31

HND-R106
HND-R106 K09/0422 page 3
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com

HND-R106
page 4 HND-R106 K09/0422
2. Note
Please read these operating instructions before unpacking and putting the unit
into operation. Follow the instructions precisely as described herein.
The instruction manuals on our website www.kobold.com are always for currently
manufactured version of our products. Due to technical changes, the instruction
manuals available online may not always correspond to the product version you
have purchased. If you need an instruction manual that corresponds to the
purchased product version, you can request it from us free of charge by email
([email protected]) in PDF format, specifying the relevant invoice number and
serial number. If you wish, the operating instructions can also be sent to you by
post in paper form against an applicable postage fee.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applying to Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only when the
machines fulfil the EC-machine guidelines.
3. Instrument Inspection
Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of
the delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes:
 pH-, Redox- and Temperature Portable Measuring Instruments
model: HND-R106
4. Regulation Use
Any use of the pH-, Redox- and Temperature Portable Measuring Instruments,
model: HND-R106, which exceeds the manufacturer’s specification, may
invalidate its warranty. Therefore, any resulting damage is not the responsibility of
the manufacturer. The user assumes all risk for such usage.

HND-R106
HND-R106 K09/0422 page 5
5. Operating Principle
The KOBOLD hand-held pH, Redox and temperature measuring instruments of
the HND-R106 model are compact and universally applicable measuring units for
electrodes with BNC plug connection. An extensive selection of electrodes makes
it possible to use the HND-R106 in almost all application areas. The KOBOLD
HND-R105 measuring unit offers functions like minimum/maximum value
memory, hold function, auto off function and automatic temperature
compensation. In addition to pH, Redox and temperature measurement, the
device can display the rH value. This is calculated from the measured Redox-
value and the previously measured or manually entered pH-value.
6. Electrical Connection and Maintenance Advice
Treat device and sensor carefully. Use only in accordance with above
specification (do not throw, hit against etc.). Protect plug and socket from soiling.
6.1 Mains operation
Attention: When using a power supply device please note that
operating voltage has to be 10.5 to 12 VDC. Do not apply
overvoltage!! Cheap 12 V-power supply devices often have
excessive no-load voltage. We, therefore, recommend using
regulated voltage power supply devices. Trouble-free operation is
guaranteed by our power supply HND-Z002. Prior to connecting
the plug power supply device with the mains supply make sure
that the operating voltage stated at the power supply device is
identical to the mains voltage.
6.2 When to replace battery
If and ´bAt´ are shown in the lower display the battery has been used up and
needs to be replaced. The device will, however, operate correctly for a certain
time. If ´bAt´ is shown in the upper display the voltage is too low to operate the
device; the battery has been completely used up.
Please note: The battery has to be taken out, when storing
device above 50 °C. We recommend taking out battery if device
is not used for a longer period of time.

HND-R106
page 6 HND-R106 K09/0422
6.3 Temperature probe
When connecting the temperature probe the connector may not lock to the jack
correctly.
In such a case hold the connector not at the case but at the buckling protection of
the cable during the plug in. Don't connect electrode canted! If plug is entered
correctly, it will slide in smoothly. To disconnect temperature probe do not pull at
the cable but at the plug.
If plug is entered incorrectly the connecting pins of the plug can be damaged. =>
Plug can no longer be used and connecting cable needs to be replaced.
6.4 Damaged electrode
Display values for damaged electrode cable or if no pH or redox-electrode has
been connected:
If no electrode is connected or the connection cable is damaged the display will
nevertheless show mV, pH or rH values.
Please note that these values can never be correct measuring results!
7. Safety Requirements
This device has been designed and tested in accordance with the safety
regulations for electronic devices. However, its trouble-free operation and
reliability cannot be guaranteed unless the standard safety measures and special
safety advises given in this manual will be adhered to when using the device.
1. Trouble-free operation and reliability of the device can only be guaranteed if
the device is not subjected to any other climatic conditions than those stated
under chapter Technical Data.
If the device is transported from a cold to a warm environment condensation
may cause in a failure of the function. In such a case make sure the device
temperature has adjusted to the ambient temperature before trying a new
start-up.
2. If device is to be connected to other devices (e.g. via serial interface) the
circuitry has to be designed most carefully. Internal connection in third party
devices (e.g. connection GND and earth) may result in not-permissible
voltages impairing or destroying the device or another device connected.

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HND-R106 K09/0422 page 7
Warning: If device is operated with a defective mains power supply
(short circuit from mains voltage to output voltage) this may result
in hazardous voltages at the device (e.g. sensor socket, serial
interface).
3. If there is a risk whatsoever involved in running it, the device has to be
switched off immediately and to be marked accordingly to avoid re-starting.
Operator safety may be a risk if:
• there is visible damage to the device
• the device is not working as specified
• the device has been stored under unsuitable conditions for a longer time.
In case of doubt, please return device to manufacturer for repair or
maintenance.
Warning: Do not use these products as safety or emergency stop
devices or in any other application where failure of the product
could result in personal injury or material damage. Failure to
comply with these instructions could result in death or serious
injury and material damage.

HND-R106
page 8 HND-R106 K09/0422
8. Instrument Description
8.1 Displays
8.2 Pushbuttons

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HND-R106 K09/0422 page 9
8.3 Connections
8.4 Pop-up clip
Handling:
- Pull at label “open” in order to swing open the pop-up clip.
- Pull at label “open” again to swing open the pop-up clip further.
Function:
- The device with a closed pop-up clip can be plainly laid onto a table or attached to a
belt, etc.
- The device with pop-up clip at position 90° can be set up on a table, etc.
- The device with pop-up clip at position 180° can be suspended from a screw or the
magnetic holder
Interface: connection for galv. isolated interface
adapte
r
(accessory: HND-Z031, HND-Z032)
BNC socket: connection of ph or ORP electrode
(glass electrodes or combination electrodes)
Banana sockets:
Connection of PT1000 temperature probe
Electrodes with integrated temperature sensor:
The banana plug is connected from outside
Separately lead through reference electrode:
It is connected from inside
Power supply: additional d.c. connector (internal pin
ø 1.9 mm) for external 10.5-12 V direct supply

HND-R106
page 10 HND-R106 K09/0422
8.5 Start Operation
Turn device on via key.
After segment test the device displays some information on its
configuration:
if zero point or slope correction is active
(see chapter 13 Adjustment of temperature input)
After that the device is ready for measuring.

HND-R106
HND-R106 K09/0422 page 11
9. Principles of the measurements
9.1 pH measurement
The pH value specifies the acid or alkaline behaviour of aqueous solutions.
Solutions with a pH values below 7 are acid (the more below 7 the more acid),
values higher than 7 mean alkaline and pH = 7 means neutral.
The pH value is the negative common logarithm of the hydrogen ion activity (this
is often approximately equal to the concentration of dissolved hydronium ions):
with c(H+): concentration of dissolved hydronium ions in
mol/l
f(H+): activity coefficient (normally lower than 1)
The abbreviation “pH” stands for pondus Hydrogenii (Latin pondus: “weight“;
Hydrogenium: “hydrogen“).
pH values should always be measured and saved together with the temperature
of the solution: i.e. pH 5.87; 22.8 °C.
Reason: The pH values of most liquids are depending on temperature.
The pH measurement is highly precise but also very sensitive. The measured
signals are very weak (high resistance), especially if measured in low-ion media.
Therefore, it is very important that:
- disturbances (electrostatic charge, etc.) are prevented.
- a stable value is reached by slow stirring.
- contact plugs are kept clean and dry.
- the electrode shaft is not submersed for a longer period (exception: special
water-proof types).
- the electrode is calibrated often enough (see below). The needed calibration
frequency depends on the used electrode and application and varies between
once every hour to once in several weeks.
- A suitable electrode is chosen. Please refer to chapter 9.4
9.2 ORP measurement
The ORP potential (also known as reduction potential or ORP) is a measure of the
oxidizing or reducing potential of the measured media compared to the standard
hydrogen electrode.
This potential is often used in swimming pools to rate the disinfectant effect of
chlorination. Also, for aquarium keepers the ORP value is an important parameter,
because fishes need ORP values within specified boundaries to live. Drinking
water purification, water monitoring and industrial applications are some further
fields where the ORP value is of importance.
The measurement is done with a common silver chloride electrode (reference
system with 3-molar potassium chloride solution). The measured value can be
directly displayed (mode mV) or converted to “reference system: standard
hydrogen electrode” and temperature compensated at mode mVH.

HND-R106
page 12 HND-R106 K09/0422
There is no calibration comparable with that of the pH measurement. However, the
electrode’s capability can be checked with ORP test solutions (for example HND-
Z074).
Suitable ORP electrodes: e.g. HND-RF08
9.3 rH measurement
The rH value is a calculated value of a pH and an ORP measurement. For
example, it is used to describe the anti-oxidative effect of food. This is a measure
for the ability of food to reduce harmful free radicals.
To measure the rH value of a solution, proceed as follows:
9.3.1 Manual input of pH value (and temperature)
You can set the value for pH and temperature (if no temperature sensor is
connected) manually. Press key shortly and set the temperature value with
keys and Press shortly again and enter the pH value. Confirm with
.
9.3.2 Automatic input of pH value from preceding pH measurement
It is important that the pH and ORP electrodes are in sound condition and that
they are cleaned and dried well before they are inserted to the solution.
First place pH and ORP electrode and temperature probe in the solution and stir
carefully.
1. Measuring pH value:
Connect the pH electrode and temperature probe to the device.
Then set device to pH measuring mode and calibrate electrode if necessary
(p.r.t. chapter 9.5 Calibration of pH measurement and chapter 10
Configuration).
Measure the pH value of the solution and store the measured value with .
Do not turn off the device until the tH measurement is finished. If the device is
turned off the saved pH value is deleted and has to be set manually for the
following rH measurement.
2. Get the rH value:
Connect ORP electrode and set device to rH measuring mode. The main
display shows the calculated rH value of the solution, the secondary display
shows the prior measured pH value and the temperature alternatingly.

HND-R106
HND-R106 K09/0422 page 13
9.4 pH electrode
9.4.1 Design
In most cases so-called combination electrodes are
used. That means that all needed elements are
integrated in a single electrode (including reference
electrode).
Sometimes even a temperature sensor is integrated.
The picture on the right shows an electrode without
temperature sensor.
There are several design types for the diaphragm, but
generally said it is the connection between electrolyte
and the measured solution. A blockade or soiling of the
diaphragm is often the reason for the electrode’s
idleness and erratic behaviour.
The glass membrane has to be treated with care. The
hydrated gel layer forms on the surface of the glass
membrane, which is of highest importance for the
measurement. The electrode has to be kept wet to
preserve the hydrated gel layer (see below).
9.4.2 Further Information
PH-electrodes are wearing parts which need to be replaced, if the values required
can no longer be kept even after thorough cleaning and recovery or the electrode
signal gets to slow. The actual lifetime of an electrode depends highly on the
chemical or mechanical stress it is subjected to. Please take into account that
there are several materials that are in aqueous solutions aggressive to glass;
other chemicals may react with the KCl-solution in the electrode thus causing
blockades in the diaphragm.
Examples:
- with solutions containing protein, like they are used on the medical and
biological sector, KCI may result in the denaturation of the protein. - coagulated
varnish
- solutions with a relatively high concentration of silver ions
Any material depositing on the measuring membrane or the diaphragm will
influence the measurements and have to be removed at regular intervals. This
can be done by means of automatic cleaning equipment.
Electrodes have to be stored in a way that they are kept wet. An adequate
solution is to store them with suitable protective cap filled with KCl 3 M.
Please consider also the instructions in the electrode’s manual!

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page 14 HND-R106 K09/0422
Standard cleaning: apply 0.1 molar HCl-solution for at least 5 minutes or protein
cleaning agent.
The average service life of an electrode is 8 to 10 months but may be increased
to 2 years if electrode is well maintained and treated carefully. We regret not
being able to give more detailed information as this is highly dependent on the
individual case of application.
9.5 Calibration of pH measurement
The electrode data of pH electrodes are subject to fluctuation due to ageing and
manufacturing tolerances. Therefore, it is necessary to check the calibration with
buffer solutions before measurements take place. If deviations are too large, a
recalibration is necessary. See also chapter 18 Preparation of ph Buffer Solution.
Buffer solutions are liquids with an accurate pH-value. The following buffers can
be used for calibration:
- Technical buffer series PHL (ready to use, pH 4.01, pH 7.00 und pH 10.01)
- Standard series GPH (buffer capsules to be mixed with water pH 4.01, pH 7.00
and pH 10.01) - DIN series CAL dIn (pH 1.68 (A), pH 4.01 (C), pH 6.87 (D), pH
9.18(F) und pH 12.45(G))
- Arbitrary buffer CAL Edit (neutral buffer ranging from 6.5 ... 7.5pH)
Service life of a buffer solution is limited and will be further reduced unless
the electrodes are properly rinsed and dried when changing over the
solutions. This may even result in incorrect calibration! We recommend to
use new buffer solution for calibration, as far as possible, and to rinse with
deionized or distilled water.
9.5.1 Automatic temperature compensation during calibration
Both the signal of the pH-electrode and the pH-buffer are depending on
temperature. If a temperature probe is connected, the temperature influence of
the electrode is compensated automatically during measuring as well as during
calibration. Otherwise enter actual buffer temperature as accurate as possible
(see below). When working with the standard or DIN-buffer series, the influences
of buffer temperature are also compensated. If buffers are entered manually,
make sure to enter the pH-values of the buffers at the relevant temperature to
ensure optimum calibration of the device.

HND-R106
HND-R106 K09/0422 page 15
9.5.2 How to carry out calibration
Please note: the calibration can only carried out at a temperature range of 0
- 60°C !
If you have not yet done so set device to measuring mode ’pH’. Make sure that
either the 1-, 2- or 3- point calibration (whichever is required) and desired buffer
series (PHL, GPH, dIn or Edit) the has been activated (further information in
chapter 7 „Configuration“).
Carefully remove electrode safety cap (Attention! Contains 3 mol KCl!).
Rinse electrode with distilled water and dry it carefully.
How to start calibration: press key for 2 seconds.
The display will prompt you to measure the first calibration solution. You can
abort calibration at any time by pressing key. In such a case the last
calibration before this one remains valid.
1. Calibration point 1: ‘Pt. 1’
Place electrode and temperature probe (if any) in the neutral
solution stirring gently.
(For 1-point calibration: solutions with arbitrary pH value (e.g. pH
4) can be used)
As soon as the measured pH value got stable the next calibration
step will be displayed.
*1)
No temperature sensor: manual input of temperature of buffer 1
Use or to enter the temperature of the buffer solution.
Use to confirm the value; the next calibration step is
displayed.
If 1-point calibration is chosen the calibration is already done at
this point, the bar graph display on the left shows the electrode’s state rating.
2. Rinse electrode in distilled or deionized water, dry electrode
3. Calibration point 2: ‘Pt. 2’ (only for 2- or 3- point calibration)
Place electrode and temperature probe (if any) in the second
buffer solution (e.g. for standard series this is: pH 4.0 or pH 10.0)
and stir gently.
As soon as the measured pH value got stable the next calibration
step will be displayed.
*1)

HND-R106
page 16 HND-R106 K09/0422
No temperature sensor: manual input of temperature of buffer 2
Use or to enter the temperature of the buffer solution. Use
to confirm the value; the next calibration step is displayed.
If 2-point calibration is chosen the calibration is already done at this
point, the bar graph display on the left shows the electrode’s state
rating.
4. Rinse electrode in distilled or deionized water, dry electrode
5. Calibration point 3: ‘Pt. 2’ (only for 3- point calibration)
Please note: both, an alkaline and acid calibration point are needed for a 3-
point calibration.
Place electrode and temperature probe (if any) in the third buffer
solution (e.g. for standard series this is: pH 10.0) and stir gently.
As soon as the measured pH value got stable the next calibration
step will be displayed.
*1)
No temperature sensor: manual input of temperature of buffer 3
Use or to enter the temperature of the buffer solution.
Use to confirm the value; the next calibration step is
displayed.
Calibration has finished, the bar graph display on the left shows the electrode’s
state rating.
*1) In case of manual buffer selection (CAL Edit) use or to enter pH
value of the used solution. If solutions from the standard and DIN series are used
their pH value will be automatically detected.
Use to confirm the value; the next calibration step is displayed.

HND-R106
HND-R106 K09/0422 page 17
Error messages of pH calibration:
Neutral buffer not permissible
- wrong buffer solution
- Buffer solution defective
- Electrode defective
Always use neutral buffer as first
solution (exception: 1 point
calibration)
Use new buffer solution
Clean electrode and calibrate again,
if error occurs again replace
electrode
Slope is too low:
- Buffer solution defective
- Electrode defective
Use new buffer solution
Replace electrode
Slope is too high:
- Buffer solution defective
- Electrode defective
Use new buffer solution
Replace electrode
Incorrect calibration
temperature
Calibration can only be done at
0...60°C
Permissible electrodes’ data:
Asymmetry: ±55 mV, Slope: -62 ...-45 mV/pH

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10. Configuration
Some menu points depend on current device settings.
To change device settings, press “Menu” for 2 seconds. This will activate the
configuration menu (main display: “SEt”). Pressing “Menu” changes between
the menus points, pressing jumps to the referring parameters, which can be
selected with key .
The parameter can be changed with or . Pressing “Menu” again jumps
back to the main configuration menu and saves the settings. Pressing “Quit”
finishes the configuration and returns back to standard measuring operation.
Pressing “menu” and “store” at the same time for more than 2 seconds will
reset the device to factory defaults.
If no key is pressed for more than 2 minutes the configuration will be aborted. All
changes will not be saved!
Menu Parameter
V
alue Description
or .
Set Con
f
i
g
uration: General confi
g
uration
Input: Selection of measured values
A
rrow „rh“ rH value measurement
A
rrow „mV“ mV value measurement
(
REDOX o
r
ORP
)
Arrow „mVH“ mV value measurement referring to
standard h
y
dro
g
en s
y
stem
A
rrow„pH“ pH value measurement
Resolution pH: resolution of pH displa
y
0.1..0.01 tenth pH..hundredth pH
Calibration: Select number of calibration points
1-Pt 1-point (only offset calibration, slope = -59.2
mV/pH
)
2-Pt 2-point
(
neutral + another one
)
3-Pt 3-point (neutral + one acid + one alkaline
buffer
)

HND-R106
HND-R106 K09/0422 page 19
Menü Parameter
V
alue Description
Calibration: Select buffer series
GPH Technical Buffer series: GPH-Capsules
(
pH 7, pH 4, pH 10
)
PHL Technical liquid buffer series: PHL ( pH 7,
pH 4, pH 10
)
dIn DIN 19266 buffer series pH 1.68(A), pH 4.01
(
C
)
, pH 6.87
(
D
)
, pH 9.18
(
F
)
, pH 12.45
(
G
)
Edit
A
rbitrar
y
buffer, manual input
Calibration: Calibration reminder period (factory setting:
off
)
1...365 Calibration reminder period
(
in da
y
s
)
oFF No calibration reminde
r
Unit t: Select temperature unit
°C
A
ll temperatures in de
g
ree Celsius
°F
A
ll temperatures in de
g
ree Fahrenheit
Auto Hold: Auto measuring value identification
on Auto measuring value identification Auto
Hold
oFF Standard hold function on key press
Auto Power-Off: Select power-off delay
1…120 Power-off delay in minutes. Device will be
automatically switched off as soon as this
time has elapsed if no key is pressed/no
interface communication takes place.
oFF Automatic power-off function deactivated
(
continuous operation
)
Universal Output
oFF Interface off  minimal power consumption
SEr: Serial interface activated
dAC: Analog output activated
01,11..91 Base address for serial interface
communication

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page 20 HND-R106 K09/0422
Set Corr: Input adjustment
Zero adjustemnt/offset of voltage measurement
oFF No zero adjustment for voltage
measurement
-10…10 mV Offset of voltage measurement in mV
Slope adjustment of voltage measurement
oFF No slope adjustment for voltage
measurement
-5.00…5.00% Slope correction of voltage measurement
in %
Zero adjustment/offset of temperature measurement
oFF No zero adjustment for temperature
measurement
-5.0...5.0 °C Offset of temperature measurement in °C
Slope adjustment of temperature measurement
oFF No slope adjustment for temperature
measurement
-5.00..5.00 % Slope correction of temperature
measurement in %
Set Clock: Settings for real time clock
HH:MM Clock: set time hours:minutes
YYYY Year: set year
TT.MM Date: set date day.month
rEAd CAL: Read calibration data:
p.r.t. chapter 13.2 calibration storage (rEAd CAL)