Kobold HND-C110 User manual

Operating Instructions
for
Hand-held Conductivity
Measuring Units
Model: HND-C110

HND-C110
page 2 HND-C110 K05/0422
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 4
3.Instrument Inspection .................................................................................... 4
4.Regulation Use ............................................................................................. 4
5.Operating Principle ........................................................................................ 5
6.Electrical Connection .................................................................................... 5
6.1Mains operation: .................................................................................. 5
7.Operation / Configuration / Adjustments ....................................................... 6
7.1Safety Requirements ........................................................................... 6
7.2Connections ......................................................................................... 6
7.3Pop-up clip ........................................................................................... 7
7.4Pushbuttons ......................................................................................... 8
8.Start operation............................................................................................... 9
9.Principles of the measurements .................................................................... 9
9.1Basics about conductivity ..................................................................... 9
9.2Conductivity measurement .................................................................. 9
9.3Resistivity measurement .................................................................... 10
9.4TDS measurement ............................................................................. 10
9.5Salinity measuring ............................................................................. 11
9.6Electrodes / measuring cells .............................................................. 11
9.7Temperature compensation ............................................................... 11
10.Device Configuration ................................................................................... 12
11.Universal output .......................................................................................... 14
11.1The Serial Interface ........................................................................... 14
12.Adjustment of temperature input ................................................................. 15
13.Automatic adjustment/calibration of cell correction ..................................... 16
14.GLP ............................................................................................................. 17
14.1Calibration interval (C.Int) .................................................................. 17
14.2Calibration storage (rEAd CAL) ......................................................... 17
14.3Real Time Clock (“CLOC”) ................................................................. 17
14.4Accuracy Check / Adjustment Service ............................................... 18
14.5Error and System Messages .............................................................. 19
15.Maintenance ............................................................................................... 20
15.1Battery change ................................................................................... 20
16.Technical Information .................................................................................. 20
17.Order Codes ............................................................................................... 22
17.1Accessories ....................................................................................... 22
18.EU Declaration of Conformance ................................................................. 23

HND-C110
HND-C110 K05/0422 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-C110
page 4 HND-C110 K05/0422
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:
 Hand-held Conductivity Measuring Units Model: HND-C110
4. Regulation Use
Any use of the Hand-held Conductivity Measuring Units, model: HND-C110,
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-C110
HND-C110 K05/0422 page 5
5. Operating Principle
The KOBOLD hand-held conductivity measuring units of model HND-C110 is a
compact conductivity measuring units with solidly connected probes that can be
used universally. Due to the double display, both the conductivity and the
temperature value can be displayed simultaneously. The HND-C110 model offers
functions like minimum/maximum value memory, hold function, auto-off function,
and AutoRange (automatic adjustment of the optimum measuring range).
Due to the high temperature dependency in conductivity measurement, the
manual measuring unit has automatic temperature compensation.
With the improved unit HND-C110, the determination of resistance, salinity and
TDS are also part of the scope of functions.
6. Electrical Connection
6.1 Mains operation:
When using a power supply unit please note that operating voltage has to be 10.5
to 12 VDC. Do not apply over-voltage!! Simple 12 V-power supply units often have
excessive no-load voltage. We, therefore, recommend using regulated voltage
power supply units. Trouble-free operation is guaranteed by our power supply
HND-Z002. Prior to connecting the plug power supply unit with the mains supply
make sure that the operating voltage stated at the power supply unit is identical to
the mains voltage.

HND-C110
page 6 HND-C110 K05/0422
7. Operation / Configuration / Adjustments
7.1 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 16 Technical Data.
2. If the device is transported from a cold to a warm environment
condensation may cause a failure of the instrument. In such a case make
sure the device temperature has adjusted to the ambient temperature
before trying a new start-up.
3. If the 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.
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).
4. 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.
 there is visible damage to the device
 the device is not working as specified
 the device has been stored under unsuitable conditions.
In case of doubt, please return the device to manufacturer for repair or
maintenance.
7.2 Connections
Interface: Connection for electrically isolated interface
adaptor (accessories: HND-Z031)
Electrode: cable gland for fixed conductivity electrode
The mains socket is located at the left side of the instrument.

HND-C110
HND-C110 K05/0422 page 7
7.3 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

HND-C110
page 8 HND-C110 K05/0422
7.3.1 Displays
7.4 Pushbuttons

HND-C110
HND-C110 K05/0422 page 9
8. Start operation
Turn device on via key.
After segment test the device displays some information on its
configuration:
if cell correction scale was changed (cell correction scale unequal
1.000) (see chapter 10 Automatic adjustment/calibration of cell
correction)
if zero point or slope correction is active
(see chapter 12 Adjustment of temperature input)
After that the device is ready for measuring.
9. Principles of the measurements
9.1 Basics about conductivity
Definition of conductivity γ: The ability of a material to conduct electric current:
l: length of the material diameter measured resistance
A: diameter
R: measured resistance
Unit common for liquids: and
The conductivity is the reciprocal value of the resistivity.
(The conductance is the reciprocal value of the measured resistance R)
9.2 Conductivity measurement
The conductivity measurement is a rather uncomplicated measurement. The
standard electrodes are stable for a long time if used correctly and can be
adjusted by an integrated Cal-function.
Measuring ranges: 0.0 – 200.0 µS/cm
0 - 2000 µS/cm
0.00 – 20.0 mS/cm
0.0 – 200.0 m
If the range selection is set to „Auto Range“, the range with the best resolution is
automatically selected. However, interface operation requires a manual/fixed
selection of the measuring range from the table above (No interface operation
with Auto-range!).

HND-C110
page 10 HND-C110 K05/0422
9.3 Resistivity measurement
The resistivity is the reciprocal value of the conductivity and the device displays it
in kOhm•cm.
Measuring ranges: 0.000 – 2.000 kOhm*cm
0.00 – 20.00 kOhm*cm
0.0 – 100.0 kOhm*c
If the range selection is set to „Auto Range“, the range with the best resolution is
automatically selected. However, interface operation requires a manual/fixed
selection of the measuring range from the table above (No interface operation
with Auto-range!).
9.4 TDS measurement
At the TDS (total dissolved solids) measurement the filtrate dry residue is
determined by means of the conductivity and a conversion factor (C.tdS). Well
suited for easy concentration measurements of e.g. salt solutions. The
determined value is displayed in mg/l.
Measuring ranges: 0,0 - 200,0 mg/l 0 – 2000 mg/l
Displayed value TDS = conductivity [in µs/cm, nLF-temp. comp. at 25°C] • C.tdS
(input at menu)
Approximately:
C.tdS
0.50 Monovalent salts with 2 ion t
y
pes
(
NaCl, KCl, etc.
)
0.50 Natural waters / surface waters, drinkin
g
wate
r
0.65-0.70 e.
g
. salt concentration of aqueous fertilizer solutions
Attention: This are only approximate values – good for estimations, but no precise
measurement.
For precise measurements the conversion value has to be determined for the
corresponding solution for the relevant concentration range.
This may be done by comparison with known reference solutions or by actually
evaporating a certain amount of solution with determined conductivity and
subsequent weighing of the dry residue.

HND-C110
HND-C110 K05/0422 page 11
9.5 Salinity measuring
The salinity (salt content) of seawater can be determined in the measuring mode
„SAL“ (basis: International Oceanographic Tables; IOT)
The salinity of standard-seawater is 35 ‰ (35 g salt per 1 kg seawater).
The values are displayed in ‰ (g/ kg).
Additionally, the term “PSU” (Practical Salinity Unit) is sometimes used, the
displayed value is the same. The salinity measurement has its “own” temperature
compensation, i.e. the temperature is automatically taken into account for the
salinity measurement. The menu settings regarding the temperature
compensation are ignored.
Attention: The salt composition of the different seas is not the identical.
Depending on place, weather, tides, etc. there may be considerable
divergences to the 35 ‰ according to IOT. Additionally, the salt
composition may influence the ratio between salinity and actual salt
content.
9.6 Electrodes / measuring cells
9.6.1 Design
Basically, there are two types of measuring cells: 2-pole and 4-pole cells. The
operation is done similarly; the 4-pole measuring cells can compensate
polarization effects and – up to some degree – soiling due to its complex
measuring method.
9.7 Temperature compensation
The conductivity of aqueous solutions depends on its temperature. The
temperature dependency is strongly dependent on the type of solution. The
temperature compensation recalculates solutions’ conductivity to a consistent
reference temperature. The most common reference temperature is 25 °C.

HND-C110
page 12 HND-C110 K05/0422
9.7.1 Temperature compensation “nLF” according to EN 27888
For most applications (e.g. in the area of fish farming, surface or drinking water
measurements, etc.) the non-linear temperature compensation for natural water
(“nLF”, according to EN 27888) is sufficiently accurate. The common reference
temperature is 25 °C.
Recommended application range of nLF-compensation: between 60 µS/cm and
1000 µS/cm.
9.7.2 Linear temperature compensation and determination of
temperature coefficient “t.Lin“
If the actual function needed for exact temperature compensation is not known,
“linear temperature compensation” is normally selected (Menu, t.Cor = Lin, t.Lin
corresponds TKlin), i.e. one assumes that the actual temperature dependency at
the considered concentration range is approximately equal:
Temperature coefficient of about 2.0 %/K are most common.
A temperature coefficient can be determined for example by measuring a solution
with deactivated temperature compensation at two different temperatures (T1 and
T2).
TKlin is the value input at the menu “t.Lin”. LFT1 conductivity at temperature T1
LFT2 conductivity at temperature T2
10. Device Configuration
Some menu points depend on current device settings.
For configuration of the device press -key for 2 seconds. This will activate the
configuration menu (main display: “SEt”). Pressing „Menu“ changes between
the menu points, pressing jumps to the referring parameters, which can be
selected with key .
The parameter value can be changed with or . Pressing „Menu“ again
jumps back to the main configuration menu and saves the settings. Pressing
„Quit“ finishes the configuration.
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 be discarded!

HND-C110
HND-C110 K05/0422 page 13
Menu Paramete
r
V
alue Description
o
r
Set Configuration: General configuration
Input: Selection of measured variable
Cond
rESi
tdS
Conductivity
Resistivity
Total dissolved solids
SAL Salinity
SEt Change-over measured variables by Set-key
TDS measurement: conversion factor (only if Inp=tdS)
0.40-1.00 Conversion factor for TDS measurement
Cell Corr: Adjustment of cell correction: multiplication facto
r
0.800-1.200 Multiplication factor of cell correction
Factory setting: 1.000
Range: Selection of display range (conductivity, resistivity or tdS)
Auto
200.0 µS/cm
…
200.0 mS/cm
Automatic range selection
Lowest selectable range (conductivity)
…
Highest selectable range (conductivity)
Automatic adjustment/calibration with reference solution (only if
InP=Cond)
Edit
REF:S
Manual adjustment to reference value
Choice of standard reference solutions
REF.S: Choice of standard solutions for automatic adjustment/cal.
1413 µS/cm
2760 µS/cm
12.88 mS/cm
50 mS/cm
111.8 mS/cm
Reference solution 0.01 M KCL
0.02 M KCL
0.1 M KCL
Sea-water reference solution KCL
1 M KCL
Unit t: Selection of temperature unit
°C
°F
All temperature values in degree Celsius
All temperature values in degree Fahrenheit
Temperatu
r
ecompensation (not fo
r
InP=SAL)
oFF No temperature compensation of conductivity
measurement
nLF Non-linear function for natural water according to EN
27888 (ISO 7888), ground, surface and drinking
wate
r
Lin Linear temperature compensation
Compensation coefficient (only i
f
t.Cor=Lin)
0.300 3.000 Temperature compensation coefficient in %/K
Refernce temperature of temperature compensation (only if tCor=Lin
or nLF)
25 °C/77 °F
20 °C/68 °F
Reference temperature 25 °C/77 °F
Reference temperature 20 °C/68 °F
Adjustment/Calibration: Adjustment reminder period (factory setting:
oFF)
1…730
oFF
Adjustment reminder period (in days)
No adjustment reminder
Auto Hold: Automatic measuring value identification
on
oFF
Auto measuring value identification Auto Hold
Standard hold function on keypress
Auto Power-Off: Selection of power-off delay
1…120
oFF
Power-off delay in minutes
Device will automatically switch off as soon as this
time has elapsed if no key is pressed/no interface
communication takes place.
Automatic power-off function deactivated
(continuous operation)

HND-C110
page 14 HND-C110 K05/0422
Menu Paramete
r
V
alue Description
o
r
Set Output: Configuration of universal output
oFF
SEr:
Output off -> minimal power consumption
Serial interface activated
0,1,11…91 Base adress for serial interface communication
Set Corr: Measurement correction
Zero point adjustment/offset of temperature measurement
oFF
-5.0…5.0 °C
No zero point adjustment for temperature
measurement
Offset of temperature measurement in °C
Slope adjustment of temperature measurement
oFF
-5.00…5.00
No slope adjustment for temperature measurement
Slope correction of temperature measurement in [%]
Set Clock: Set real time
HH:MM Clock: set time hours:minutes
YYYY Year: set year
TT.MM Date: Set date day.month
rEAD CAL: Read calibration data:
see chapter 14.2 Calibration storage (rEAd CAL)
11. Universal output
If none of both is needed, we suggest to switch the output off, because battery life
then is extended.
11.1 The Serial Interface
All measuring and setting data of the device can be read and changed by means
of the serial interface and a suitable electrically isolated interface adapter
(HND-Z031). In order to avoid transmission errors, there are several security
checks implemented.
The following standard software packages are available for data transfer:
-BUS-S20M: 20-channel software to simultaneously display
conductivity (channel 1)
temperature (channel 2)
resistivity (channel 3)
TDS (channel 4) and/or
salinity (channel 5).
If you want to use the interface functions make sure to switch off the
Auto-Range function.
The device has 2 channels:

HND-C110
HND-C110 K05/0422 page 15
- Channel 1: current measuring value Cond, rES, TDS oder SAL (base address)
- Channel 2: temperature value
The measuring- and display range values read back from the interface are
always in the selected measurement unit!
12. Adjustment of temperature input
The temperature input can be adjusted with offset and scale. A reasonable
adjustment presumes reliable references (e.g. ice water, controlled precision
water bath, etc.).
If the inputs are adjusted (i.e. offset and scale are different from default settings)
the device will shortly display “Corr” after turned on.
Default setting for offset and scale are ‘off’ = 0.0, i.e. inputs are not changed.
Zero point correction: Displayed value = measured value – OFFS
Zero point and slope correction: Displayed value = (measured value – OFFS) *
(1 + SCAL / 100)
Displayed value °F = (meas. value °F - 32°F - OFFS) • (1 + SCAL / 100)

HND-C110
page 16 HND-C110 K05/0422
13. Automatic adjustment/calibration of cell
correction
Besides the direct input of the cell correction (see below) via the menu (“CELL
Corr”) the cell correction can also be determined automatically:
Error messages of automatic adjustment/calibration:
CAL Err.1 Cell correction too high Determined cell correction must not exceed 1.2
CAL Err.2 Cell correction too small Determined cell correction must not fall below 0.8
CAL Err.3 Solution of wrong range Wrong solution / far beyond tolerance
CAL Err.4 Wrong temperature Beyond permitted temperature:
0.0 – 34.0 °C (or 0.0 – 27.0 °C at 111.8 mS/cm)
Alternative to automatic adjustment:
Manual calculation of cell correction with a reference solution
Example KCl-solution c= 0.01 M: 1413 μS cm-1 at 25°C
At other temperatures switch temperature compensation off (t.Cor = oFF) and use the
referring conductivity!
Conductivity displayed = 1500 μS cm-1 if selected cell correction is 1.000 cm-1
(CELL Corr = 1.000)
Conductivity of solution at solution temperature 25 °C: Conductivity real = 1413 μS cm-1
Cell correction c = conductivity real / conductivity displayed [cm-1]
= 1413 / 1970 * cm-1 = 0.942 cm-1 (Enter CELL Corr of 0.942)

HND-C110
HND-C110 K05/0422 page 17
14. GLP
GLP (Good Laboratory Practice) includes regular check of devices and accessories. For
pH measurements it is highly important to ensure correct pH calibration. The device
provides the following functions to help with this.
14.1 Calibration interval (C.Int)
You can input the interval after which the device reminds you to recalibrate.
The interval times should be chosen according to the application and the stability of the
electrode. “CAL” flashes on the display as soon as the interval has expired.
14.2 Calibration storage (rEAd CAL)
The last 16 calibrations are stored with results and date and can be read out.
Display calibration data:
Historical calibration data can be comfortably read out via PC software HND-Z034 or
displayed directly at the device:
Press for 2 seconds: The display will show: or
(configuration level)
Press several times until this is displayed: read cal. = „read calibration
data“
Press shortly: switch between:
- CELL = cell correction
- C.rEF = reference value, at which cell correction has been adjusted
- Display of date+time of data set
or Change between the different calibration data sets
Quit calibration data set display
14.3 Real Time Clock (“CLOC”)
The real time clock is used for chronological assignment of the calibration points.
Please check the settings when necessary.

HND-C110
page 18 HND-C110 K05/0422
14.4 Accuracy Check / Adjustment Service
You can send the device to the manufacturer for adjustment and inspection.
Calibration certificate - DKD certificate - official certifications:
If the measuring instrument is supposed to receive a calibration certificate, it has
to be sent to the manufacturer (declare test points).
If the device is certificated together with a suitable sensor very high overall
accuracies are possible. Basic settings can only be checked and – if necessary –
corrected by the manufacturer. A calibration protocol is enclosed to the device ex
works. This documents the precision reached by the production process.

HND-C110
HND-C110 K05/0422 page 19
14.5 Error and System Messages
Display Description Remedy
Low battery voltage, device will
only continue operation for a
short time
replace battery
Low battery voltage
If mains operation:
replace battery
replace power supply, if fault continues to
exist: device damaged
no display
or
confused
characters
Battery voltage too low
If mains operation: power supply
defective or wrong
voltage/polarity
System error
Device defective
replace battery
check/replace power supply
disconnect battery or power supply, wait for
a short time, re-connect
return to manufacturer for repair
Err.1 Values exceeding meas. range
Check: are there any values exceeding the
specified meas. range?
- measuring instrument not suitable!
cable of measuring cell defective -> replace
Err.2 Values falling below meas. range
Check: are there any values falling below
the specified meas. range?
- measuring instrument not suitable!
cable of measuring cell defective -> replace
Err.7 System fault
disconnect battery, wait for 10 sec. and re-
connect battery, switch on device once
again. If fault continues to exist device is
defective -> return to manufacturer for
repair.
---- Could not calculate display value
 Measuring range or input
range exceeded
Measured values are instable
Check range parameter
Wait for signal regulation of the device
>CAL<
CAL
flashing in
upper
disp
l
a
y
Either preset calibration interval
has expired or last calibration is
not valid
Device has to be calibrated!
Error messages for automatic cell correction adjustment/calibration:
CAL Err.1 Cell correction too high Determined cell correction must not
exceed 1.2
CAL Err.2 Cell correction too small Determined cell correction must not fall
below 0.8
CAL Err.3 Solution of wron
g
ran
g
eWron
g
solution/far be
y
ond tolerance
CAL Err.4 Wrong temperature Beyond permitted temperature:
0.0-34.0 °C (or 0.0-27.0 °C at 111.8 mS/cm)
If “bat” is flashing, the battery will be exhausted soon. Further measurements are possible for
short time. If “bat” is displaced continuously the battery is ultimately exhausted and has to be
replaced. Further measurements aren’t possible anymore.

HND-C110
page 20 HND-C110 K05/0422
15. Maintenance
15.1 Battery change
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.
1) Treat device and sensor carefully. Use only in accordance with above
specification (do not throw, hit against etc.).
Protect plug and socket from soiling.
2) To disconnect sensor plug do not pull at the cable but at the plug. Don't
connect electrode canted! When connecting the probe, the plug will slide in
smoothly if the plug is entered correctly. 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.
16. Technical Information
Measuring principle: 2-electrode conductivity measuring
cell with temperature sensor
integrated into the shaft
Electrode material: graphite
Measuring range:
• Conductivity 0.0...200.0 µS/cm
0...2000 µS/cm
0.00...20.00 mS/cm
0.0...200.0 mS/cm
(manually adjustable or automatically)
• Temperature -5.0...+100.0 °C
23.0...212.0 °F
Accuracy: (± 1 digit, at nominal temperat. 25 °C)
• Conductivity ±0.5 % MV ±0.3 % FS or
±2 µS/cm
• Temperature ±0.2 K