GHM G 1410 User manual

Operating manual
G 1410
Handheld conductivity measuring
device
EN

Table of contents
2 / 24 B-H87.0.01.DB200-2.0
Table of contents
1 About this documentation ................................................................................................................. 4
1.1 Foreword............................................................................................................................................... 4
1.2 Purpose of the document...................................................................................................................... 4
1.3 Legal notices......................................................................................................................................... 4
1.4 Correctness of content.......................................................................................................................... 4
1.5 Layout of this document........................................................................................................................ 4
1.6 Further information ............................................................................................................................... 5
2 Safety ................................................................................................................................................... 6
2.1 Explanation of safety symbols .............................................................................................................. 6
2.2 Foreseeable misuse ............................................................................................................................. 6
2.3 Safety instructions ................................................................................................................................ 6
2.4 Intended use ......................................................................................................................................... 7
2.5 Qualified personnel............................................................................................................................... 7
3 Description .......................................................................................................................................... 8
3.1 Scope of delivery .................................................................................................................................. 8
3.2 Functional description........................................................................................................................... 8
4 The product at a glance ..................................................................................................................... 9
4.1 The G 1410........................................................................................................................................... 9
4.2 Display elements .................................................................................................................................. 9
4.3 Operating elements .............................................................................................................................. 9
5 Measurement Basics ........................................................................................................................ 11
5.1 Conductivity principles ........................................................................................................................ 11
5.2 General information about conductivity measuring............................................................................. 11
5.3 Conductivity measurement ................................................................................................................. 11
5.4 Total dissolved solids / TDS measurement ........................................................................................ 12
5.5 Salt content / salinity measurement.................................................................................................... 12
5.6 Electrodes / measuring cell................................................................................................................. 13
5.6.1 Design................................................................................................................................................. 13
5.6.2 Calibration / adjustment of the measuring cell.................................................................................... 13
5.7 Temperature compensation................................................................................................................ 13
5.7.1 NLF temperature compensation according to EN 27888.................................................................... 13
6 Operation and maintenance ............................................................................................................ 14
6.1 Operating and maintenance notices ................................................................................................... 14
6.2 Battery ................................................................................................................................................ 14
6.2.1 Battery indicator.................................................................................................................................. 14
6.2.2 Changing battery ................................................................................................................................ 14
7 Operation........................................................................................................................................... 16
7.1 Commissioning ................................................................................................................................... 16
7.1.1 Explanation ......................................................................................................................................... 16
7.2 Configuration ...................................................................................................................................... 16
7.2.1 Explanation ......................................................................................................................................... 16
7.2.2 Opening the configuration menu......................................................................................................... 16
7.2.3 Configuring parameters of the configuration menu............................................................................. 17
7.2.4 Adjustment of the measuring input ..................................................................................................... 19
7.2.5 Configuring parameters of the adjustment menu................................................................................ 19

Table of contents
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8 Error and system messages............................................................................................................ 22
9 Disposal............................................................................................................................................. 23
10 Technical data................................................................................................................................... 24

1 | About this documentation G 1410
4 / 24 B-H87.0.01.DB200-2.0
1 About this documentation
1.1 Foreword
Read this document carefully and familiarise yourself with the operation of the product
before you use it. Keep this document ready to hand and in the immediate vicinity of
the product so that it is available to the personnel/user for reference at all times in
case of doubt.
The product was developed according to the state of the art and fulfils the require-
ments of the applicable European and national Directives. All corresponding docu-
ments are available from the manufacturer.
_
Only technically qualified persons are permitted to carry out commissioning, operation,
maintenance and decommissioning. The qualified personnel must have carefully read
and understood the operating manual before beginning any work.
1.2 Purpose of the document
_
– It provides important information for operating safely and efficiently with the
product.
1.3 Legal notices
_
The liability and warranty of the manufacturer for damages and consequential dam-
ages are voided with misuse, disregarding this document, disregarding safety notices,
assignment of inadequately qualified technical personnel and arbitrary modifications of
the product.
Only carry out the maintenance and service tasks on this product that are described in
this documentation. In the process, adhere to the specified steps. For your own safety,
only use original spare parts and accessories of the manufacturer. We assume no li-
ability for the use of other products and resulting damage.
This document is entrusted to the recipient for personal use only. Any impermissible
transfer, duplication, translation into other languages or excerpts from this operating
manual are prohibited.
The manufacturer assumes no liability for print errors.
1.4 Correctness of content
The contents of this document were checked for corrected and are subject to a con-
tinuous correction and updating process. This does not rule out potential errors. In the
event that errors are discovered or in case of suggestions for improvement, please in-
form us immediately via the indicated contact information in order to help us make this
document even more user-friendly.
1.5 Layout of this document
Description
Each chapter is explained at the beginning in the description.
Prerequisite
All mandatory prerequisites are then listed for each step.

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Instruction
Tasks to be carried out by the personnel / user are represented as numbered instruc-
tions. Adhere to the sequence of the specified instructions.
Representation
Shows an illustrative instruction or a configuration of the product.
Formula
Some instructions include a formula for a general understanding of a configuration,
programming or a setting of the product.
Outcome of an action
Result, consequence or effect of an instruction.
Emphases
In order to simplify legibility and provide a clearer overview, various sections / informa-
tion are emphasised.
–1234 Display elements
–Mechanical controls
–Product functions
–Product labels
–Cross-reference [}p.4]
–Foot notes
1.6 Further information
_
Software version of the product:
– V1.3 or later

2 | Safety G 1410
6 / 24 B-H87.0.01.DB200-2.0
2 Safety
2.1 Explanation of safety symbols
_
DANGER
This symbol warns of imminent danger, which can result in death, severe bodily injury,
or severe property damage in case of non-observance.
_
CAUTION
This symbol warns of potential dangers or harmful situations, which can cause dam-
age to the device or to the environment in case of non-observance.
_
NOTE
This symbol indicates processes, which can have a direct influence on operation or
can trigger an unforeseen reaction in case of non-observance.
2.2 Foreseeable misuse
_
The fault-free function and operational safety of the product can only be guaranteed if
applicable safety precautions and the device-specific safety instructions for this docu-
ment are observed.
If these notices are disregarded, personal injury or death, as well as property damage
can occur.
_
DANGER
Incorrect area of application!
In order to prevent erratic behaviour of the product, personal injury or property dam-
age, the product must be used exclusively as described in the chapter Description
[}p.8] in the operating manual.
– Do not use in safety / Emergency Stop devices!
– The product is not suitable for use in explosion-prone areas!
– The product must not be used for diagnostic or other medical purposes on pa-
tients!
– The product is not intended to come into direct contact with food. For measure-
ment in foods, samples must be taken and discarded after the measurement!
– Not suitable for use with requirements on functional safety, e.g. SIL!
2.3 Safety instructions
_
NOTE
This product does not belong in children's hands!

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2.4 Intended use
_
The product is designed for measuring the conductivity in liquids. The measuring cell
is connected permanently.
2.5 Qualified personnel
_
For commissioning, operation and maintenance, the relevant personnel must have ad-
equate knowledge of the measuring process and the significance of the measure-
ments. This document makes a valuable contribution to this. The instructions in this
document must be understood, observed and followed.
In order to avoid any risks arising from interpretation of the measurements in the con-
crete application, the user must have additional expertise. The user is solely liable for
damages/danger resulting from misinterpretation due to inadequate expertise.

3 | Description G 1410
8 / 24 B-H87.0.01.DB200-2.0
3 Description
3.1 Scope of delivery
Please check to ensure the completeness of the product after opening the package.
You should find the following components:
– Quick reference guide
– Handheld measuring device, ready for operation, including batteries
– Permanently connected conductivity measuring cell
3.2 Functional description
The product offers precision, speed and reliability in a compact, ergonomic housing.
Additional impressive features include the dust-proof and waterproof design in accord-
ance with IP 65/67 and the 3-line illuminated display, which offers overhead display at
the push of a button. The product can be switched on, switched off and configured and
the measurements and parameters can be adjusted and held with the operating ele-
ments. The product is equipped with a universal 2-pole graphite conductivity measur-
ing cell for measurement in the range of 0 µS/cm to 100.0 mS/cm. In addition to con-
ductivity, salinity and TDS can be determined.

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4 The product at a glance
4.1 The G 1410
LCD Display Front view
4.2 Display elements
_
Display
_
Battery indicator Evaluation of the battery status
_
Unit display Display of units or type of mode, min/max/hold
_
Main display Measurement of the current conductivity value or
value for min/max/hold
_
Auxiliary display Corresponding temperature value for the value
shown in the main display. If applicable, alternating
with the temperature compensation.
4.3 Operating elements
_
On / Off button
Press briefly Switch on the product
Activate / deactivate lighting
Long press Switch off the product
Reject changes in a menu
_
Up / Down button
Press briefly Display of the min/max value
Change value of the selected parameter
Long press Reset the min/max value of the current measure-
ment
Both simultaneously Rotate display, overhead display
_

4 | The product at a glance G 1410
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Function key
Press briefly Freeze measurement (Hold)
Return to measurement display
Call up next parameter
Long press, 2s Open menu, frozen measurement is displayed
Close menu, changes are saved

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5 Measurement Basics
5.1 Conductivity principles
Conductivity γ
Conductivity describes the capability of a material to conduct electrical current. It is
also the inverse of specific resistance. The conductance is the inverse of the meas-
ured resistance R.
Formula γ = l / (R*A)
l = length of the material
A = cross section
R = measured resistance
Unit [γ] = Siemens / metre = S / m
_
Normally, the values for liquids are specified in µS / cm or in mS / cm.
5.2 General information about conductivity
measuring
During the measurement, the conductivity measuring cell must be dipped at least in so
far, that at least 30 mm beginning from the top of the measuring cell, is located in the
medium. The maximum immersion depth for continuous operation should not exceed
110 mm
The measuring cell can either be stored dry or in water. After dry storage wetting time
will be prolonged slightly. If changing over from one liquid to another with conductivit-
ies varying widely make sure to properly rinse and shake dry measuring cell.
If conductivity measured is much higher or lower than expected this may be due to the
electrode being soiled with non-conducting or conducting foreign materials. Measuring
cell has to be cleaned with a watery soap solution. When measuring media with low
conductivities the electrode has to be stirred sufficiently.
NOTE
Measuring cell must never come into contact with water-repellent materials such as oil
or silicone.
5.3 Conductivity measurement
The conductivity measurement is a comparatively uncomplicated measurement. The
standard electrodes are stable for correct use for a long time and can be calibrated
over the gradient correction.
_
Range 1 2 3
0 to 2000 µS/cm 2.00 to 20.00 mS/cm 20 to 100 mS/cm
With the automatic range selection, the range with the best resolution is selected auto-
matically.

5 | Measurement Basics G 1410
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5.4 Total dissolved solids / TDS measurement
The total dissolved solids measurement - TDS measurement - determines the total
dissolved solids, which also called evaporation residue, based on the conductivity and
a conversion factor CtdS of the total dissolved solids. Well-suited to conduct simple
concentration measurements of salt solutions. The display shows mg/l
Range 1
0 to 2000 mg/l
Display value TDS = conductivity [in µs/cm, nLF temperature compensation at 25°C] *
CtdS menu entry
With selection of TDS, the necessary temperature compensation is selected automat-
ically. Menu settings for temperature compensation are ignored.
The following approximations apply:
CtdS
0.50 Monovalent salts with 2 ion types = NaCl, KCl or similar
0.50 Natural water of surface water, drinking water
0.65 to 0.70 Salt concentration of aqueous fertiliser solutions
NOTE
These are guideline values for estimates, but are not suitable for precise measure-
ments. The conversion factor for the respective type of solution and the examined
concentration range must be determined for precise measurements. This can take
place with calibration to known comparison solutions or with actual evaporation of a
certain amount of liquid with measured conductivity and subsequent weight of the total
dissolved solids.
5.5 Salt content / salinity measurement
In SAL measuring mode, the salinity, which is the salt content of sea water, is determ-
ined. The basis for this is the International Oceanographic Tables, IOT. Standard salt
water has a salinity of 35 ‰, 35 g of salt per 1 kg of sea water. The display in % [g/kg]
normally does not show units. The designation PSU, Practical Salinity Unit, is also
commonly used; the display value is identical. The salinity measurement has temper-
ature compensation, which means the temperature is considered for the display and
has a major influence on the display value; any menu settings regarding temperature
compensation are ignored.
NOTE
The salt composition of different seas is not identical. Depending on the location,
weather, seasons, etc., there are considerable deviations from the 35 ‰ according to
the IOT. The salt composition can also influence the relationship of the salinity display
and the actual amount of salt present.
Corresponding tables are available for many salts in salt water aquarium applications.
Salt weight to salinity according to the IOT or conductivity. In consideration of these
tables, very precise salinity measurements can be conducted.

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5.6 Electrodes / measuring cell
5.6.1 Design
There are basically two different types of measuring cells: 2-pole and 4-pole measur-
ing cells. Control and/or evaluation take place in a similar manner; the 4-pole measur-
ing cells can compensate well for polarisation effects and contamination to a certain
degree with the more elaborate measuring processes.
_
The product is equipped with a permanently connected 2-pole measuring cell.
2-pole measuring cell 4-pole measuring cell
_
Universal 2-pole graphite measuring cell with wide range of applications, such as fish
husbandry, measurement of surface water and drinking water.
5.6.2 Calibration / adjustment of the measuring cell
_
In harsh applications and due to ageing processes, the cell constant of measuring
cells changes. Depending on the application and precision requirement, the overall
precision of the display device and measuring cell measuring chain should be checked
regularly. Special testing and calibration solutions, such as GKL 100, 101 and 102 are
available for this purpose. In normal application conditions, semi-annual testing is re-
commended; Adjustment of the measuring input [}p.19]. A system test by the man-
ufacturer is recommended in case of doubt; Calibration and adjustment service.
For this purpose, also refer to
2Adjustment of the measuring input [}p.19]
5.7 Temperature compensation
The conductivity of aqueous solutions is temperature-dependent. The temperature de-
pendency varies greatly according to the type of solution. With temperature compens-
ation, the solution is calculated back to a uniform temperature in order to compare it
independently of the temperature. The normal operating temperature for this is 25 °C.
_
However, it can also be adjusted to 20 °C.
5.7.1 NLF temperature compensation according to EN 27888
_
For most applications, such as fish husbandry applications and measurement of sur-
face water and drinking water, non-linear temperature compensation for natural water
NLF is sufficiently accurate in accordance with EN 27888.
The normal operating temperature is 25 °C.
The recommended application range of NLF compensation is between 60 µS/cm and
1000 µS/cm.

6 | Operation and maintenance G 1410
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6 Operation and maintenance
6.1 Operating and maintenance notices
_
NOTE
The product and conductivity measuring cell must be handled with care and used in
accordance with the technical data. Do not throw or strike.
_
NOTE
If the product is stored at a temperature above 50 °C, or is not used for an extended
period of time, the batteries must be removed. Leaks from the batteries are avoided as
a result.
_
The device is calibrated at the factory with the permanently connected conductivity
measuring cell. The highest system precision can be achieved in this manner. If de-
sired, a gradient correction can be carried out for the product in order to further optim-
ise the accuracy in a narrow range. This is only necessary for normal use. See Adjust-
ment of the measuring input [}p.19].
6.2 Battery
6.2.1 Battery indicator
_
If the empty frame in the battery display blinks, the batteries are depleted and must be
replaced. However, the device will still operate for a certain length of time.
_
If the BAT display text appears in the main display, the battery voltage is no longer ad-
equate for operation of the product. The battery is fully depleted.
6.2.2 Changing battery
_
_
DANGER
Danger of explosion!
Using damaged or unsuitable batteries can generate heat, which can cause the batter-
ies to crack and possibly explode!
– Only use high-quality and suitable alkaline batteries!
_
_
CAUTION
Damage!
If the batteries have different charge levels, leaks and thus damage to the product can
occur.
– Use new, high-quality batteries!
– Do not use different types of batteries!
– Remove depleted batteries and dispose of them at a suitable collection point!
_

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NOTE
Unnecessary screwing places the water-tightness of the product, among other things,
at risk and should be avoided.
_
_
NOTE
Read the following handling instructions before replacing batteries and follow them
step by step. If disregarded, the product could be damaged or the protection from
moisture could be diminished.
_
_
Description Proceed as follows to replace the batteries.
_
Prerequisites – The product is switched off.
_
Instruction
A
B
C
D
Fig.3: Batteriewechsel
1. Unscrews the Phillips screws (A)and
remove the cover.
2. Carefully replace the two Mignon AA
batteries (B). Ensure that the polarity
is correct! It must be possible to insert
the batteries in the correct position
without using force.
3. The O-ring (C) must be undamaged,
clean and positioned at the intended
depth. In order to facilitate assembly
and avoid damage, a suitable grease
can be applied.
4. Fit the cover on evenly. The O-ring
must remain at the intended depth!
5. Tighten the Phillips screws (A).
_
Outcome of an action The product is now ready for use again.

7 | Operation G 1410
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7 Operation
7.1 Commissioning
7.1.1 Explanation
_
Description The product is switched on with the On/Off button. It may be necessary to configure
the product after switching on. See Configuration [}p.16].
_
Prerequisite – Sufficiently full batteries are inserted in the product.
_
Instruction – Press the On/Off button.
_
Outcome of an action
_
Information about the configuration of the product appears in the display.
POFF Automatic shut-
off
Automatic shut-off activated. The product is
switched off if no buttons have been pressed after
the adjusted time
T.OF Zero point correc-
tion
If a zero point correction of the temperature sensor
was made
T.SL Gradient correc-
tion
If a gradient correction of the temperature sensor
was made
S(L Gradient correc-
tion
If a gradient correction of the conductivity measur-
ing cell was made
– The product is now ready for measurement.
NOTE
The device is calibrated at the factory and ready for measurement. The offset and
gradient correction of the temperature measurement and gradient correction of the
conductivity measurement can be carried out when exact references are available.
This is only necessary in exceptional cases.
7.2 Configuration
7.2.1 Explanation
The following steps describe how to adapt the product for your purposes.
_
NOTE
There are various configuration parameters available depending on the product ver-
sion and configuration. These can vary depending on the product version and config-
uration.
7.2.2 Opening the configuration menu
_
Description In order to configure the product, you must first open the Configuration menu. The
menu is opened as shown in the illustration.
_
Prerequisite
_
Instruction 1. Press the Function key for 2 seconds to open the Configuration menu.
2. (ONF appears in the display. Release the function key.
3. By briefly pressing the Function key, you can scroll through the parameters. Select
the parameter you would like to configure.

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4. When you have selected the desired parameter, change the parameter to the de-
sired value with the Up button and the Down button.
5. The changes are saved after running through the entire Configuration menu. STOR
appears in the display. The Configuration menu can be exited from any arbitrary
parameter by pressing and holding the Function key for 2 seconds. The changes
made up that point are saved.
_
Representation Call up menu Next parameter Change value Save changes Discard
changes
2s Press: Single
step
Hold: Fast
change
2s 2s
Product is
switched off
_
Outcome of an action The Configuration menu is closed after the last parameter.
NOTE
If the product is switched off without saving the configuration, the last save value is re-
produced on the next start-up of the product.
7.2.3 Configuring parameters of the configuration menu
_
Description
_
The following representation shows the available parameters and various configura-
tion options.
_
Prerequisite – The Configuration menu is open. See Opening the configuration menu [}p.16].
_
Instruction 1. Select the desired parameter you would like to configure.
2. Adjust the desired configuration in the selected parameter with the Up button or
Down button.
3. The available configuration options are listed for each parameter in the following
representation.
_
_
Representation Parameter Values Meaning
_
Input
INP
(OND Measured variable - conductivity
SAL Measured variable - salt content / salinity
TDS Measured variable - total dissolved solids
_
Faktor für TDS
CTDS
0.40 .. 1.00 Conversion factor for TDS measurement
_

7 | Operation G 1410
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Temperaturkompensation
TCOR
OFF Do not compensate conductivity measurement
NLF Non-linear function for natural water in accordance
with EN 27888 (ISO 7888) Ground water, surface
water or drinking water
_
Reference temperature for temperature compensation
TREF
25 °(Reference temperature 25 °C or 77 °F
20 °(Reference temperature 20 °C or 68 °F
_
Shut-off time
POFF
OFF No automatic shut-off
15 30 60 120 240 Automatic shut-off after a selected time in minutes,
during which no buttons have been pressed
_
Backlight
L,TE
OFF Backlight deactivated
15 30 60 120 240 Automatic shut-off of the backlight after a selected
time in seconds, during which no buttons have
been pressed
ON No automatic shut off of the backlight
_
Display unit
UN,T
°(Temperature display in °C
°FTemperature display in °F
_
Factory settings
IN,T
NO Use current configuration
YES Reset product to factory settings. IN,T DONE appears
in the display
_
Outcome of an action
_
The changed value is saved and the Configuration menu is closed. STOR appears in
the display. If necessary, the product is restarted automatically in order to adopt the
changed values.
_
NOTE
The configuration is closed if no button is pressed for 2 minutes. Any changes made
up to that point are not saved. C.END appears in the display.

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7.2.4 Adjustment of the measuring input
_
Description
_
The temperature input can be adjusted with the zero point correction and the gradient
correction. If an adjustment is made, you change the pre-adjusted factory settings.
This is signalled with the T.OF, T.SL or S(L display text when the product is switched on.
The standard settings of the zero point value and the gradient value of the temperat-
ure input is 0.00. The standard setting of the gradient value of the conductivity value is
1.000. It signals that no correction is made.
In order to adjust the product, you must first open the Adjustment menu. The menu is
opened as shown in the illustration.
_
Prerequisites – Sufficiently full batteries are inserted in the product.
– The product is switched off.
– Ice water, regulated precision water baths or a water bath with a reference meas-
urement are available as a reference.
_
Instruction 1. Press and hold the Down button.
2. Press the On/Off button to switch on the product and open the Configuration
menu. Release the Down button. The display shows the first parameter.
3. By briefly pressing the Function key, you can scroll through the parameters. Select
the parameter you would like to configure.
4. When you have selected the desired parameter, change the parameter to the de-
sired value with the Up button and the Down button.
5. In order to save the new parameter value, press and hold the Function key for
longer than 1 second.
_
Representation Call up menu
Hold Release
_
Outcome of an action The Configuration menu is closed after the last parameter.
NOTE
If the product is switched off without saving the configuration, the last save value is re-
produced on the next start-up of the product.
7.2.5 Configuring parameters of the adjustment menu
_
Description The following representation shows the available parameters and various configura-
tion options.
_
Prerequisites The Adjustment menu is open. See Adjustment of the measuring input [}p.19].
_
Instruction 1. Select the desired parameter you would like to configure.
2. Adjust the desired configuration in the selected parameter with the Up button and
Down button.
3. The available configuration options are listed for each parameter in the following
representation.

7 | Operation G 1410
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_
Representation
_
Parameter Values Meaning
_
Zero point correction
T.OF
0.00 No zero point correction
-5.00 .. 5.00 Zero point correction in °C. and/or at °F -9.00 ..
9.00
_
Gradient correction of the temperature
T.SL
0.00 No gradient correction
-5.00 .. 5.00 Gradient correction in %
_
Gradient correction for the conductivity value
T.SL
1.000 No gradient correction
0.800 .. 1.200 Multiplier for the gradient correction
_
Formula
_
Zero point correction:
Displayed value = measured value – T.OF
_
Gradient correction °C:
Display = (measured value – T.OF) * (1 + T.SL / 100)
_
Gradient correction °F:
Display = (measured value – 32 °F – T.OF) * (1 + T.SL / 100) + 32 °F
_
Gradient correction γ:
Display = measured value / T.SL
_
Example calculation
_
Temperature
– Zero point correction T.OF to 0.00
– Gradient correction T.SL to 0.00
– Display unit UNIT to °C
– Display in ice water -0.2 °C
– Display in ice water setpoint T.OF = 0.0 °C
– Display in water bath 36.6 °C
– Display in water bath setpoint T.SL = 37.0 °C
–T.OF = display zero point correction – setpoint zero point
–T.OF = -0.2 °C – 0.0 °C = -0.2 °C
–T.SL = (setpoint gradient correction / (display gradient correction – T.OF) – 1) *100
–T.SL = (37.0 °C / (36.6 °C – (-0.2)) -1) *100 = 0.54
Conductivity
_
– Gradient correction S(L to 1.000
– Temperature compensation TCORR to OFF
– Control solution GKL 100 as reference