Handheld Meter for Conductivity (CR),
Specific Electrical Resistivity, TDS, and Salinity
Type 202710/30
Operating Manual
20271030T90Z001K000
V2.00/EN/00463204
Contents
1 Typographical conventions ...................................................... 5
1.1 Warning symbols .........................................................................................5
1.2 Note symbols ...............................................................................................5
2 General information .................................................................. 6
2.1 Preface .........................................................................................................6
2.2 Intended use ................................................................................................6
2.3 Safety information ........................................................................................6
2.4 Notes on operation and maintenance ..........................................................8
2.4.1 Battery operation .........................................................................................8
2.4.2 Power supply unit operation ........................................................................8
3 Identifying the device version .................................................. 9
3.1 Nameplate ....................................................................................................9
3.2 Order details .................................................................................................9
4 Operation ................................................................................. 10
4.1 Display .......................................................................................................10
4.2 Control elements ........................................................................................11
4.3 Connections ...............................................................................................12
4.4 Stand-up hinge ..........................................................................................12
5 Measuring ................................................................................ 13
5.1 The measuring cell .....................................................................................13
5.2 Switching on the device .............................................................................14
5.3 Measuring the conductivity ........................................................................14
5.4 Measuring the specific electrical resistivity ................................................15
5.5 Measuring the filtrate dry residue (TDS measurement) ..............................15
5.6 Measuring the salinity ................................................................................16
5.7 Temperature compensation .......................................................................17
5.7.1 Nonlinear temperature compensation "nLF" according to EN 27888 .......17
5.7.2 Linear temperature compensation "t.Lin" ..................................................18
5.8 Saving a measured value with the hold function (HLD) .............................18
6 Device settings ........................................................................ 19
6.1 Calling up the setting menu .......................................................................19
6.2 Resetting to default settings ......................................................................20
Contents
6.3 Configuring the device ...............................................................................20
6.3.1 Submenu "SEt ConF": general settings .....................................................20
6.3.2 Submenu "SEt Out": serial interface settings ............................................28
6.4 Parameterizing the device ..........................................................................29
6.4.1 Submenu "SEt Corr": offset/zero point correction and slope correction
of the temperature measurement ..............................................................29
6.4.2 Submenu "SEt CLOC": setting the real-time clock ...................................30
6.4.3 Submenu "rEAd CAL.": reading the calibration data .................................32
7 Calibration ............................................................................... 33
7.1 Offset/zero point correction and slope correction of the
temperature input .......................................................................................33
7.2 Calibrating the relative time constant ........................................................33
7.2.1 Calibration using customer-specific reference solution
("CAL Edit" function) ..................................................................................33
7.2.2 Calibration using standard reference solutions ("CAL rEF.S" function) .....34
7.2.3 Error messages during calibration .............................................................35
7.3 Determining the relative time constant with a calculation .........................35
8 Maintenance ............................................................................ 36
8.1 Good laboratory practice (GLP) .................................................................36
8.1.1 Calibration timer ("C.Int") ...........................................................................36
8.1.2 Reading the calibration data ("rEAd CAL") ................................................36
8.2 Real-time clock ("CLOC") ..........................................................................37
9 Error and system messages .................................................. 38
10 Returns and disposal .............................................................. 39
10.1 Returns .......................................................................................................39
10.2 Disposal .....................................................................................................39
11 Technical data ......................................................................... 40
12 China RoHS ............................................................................. 42
5
1 Typographical conventions
1.1 Warning symbols
1.2 Note symbols
DANGER!
This symbol indicates that personal injury from electrocution may occur if
the appropriate precautionary measures are not taken.
CAUTION!
This symbol in connection with the signal word indicates that damage to
assets or data loss will occur if the respective precautionary measures are
not taken.
NOTE!
This symbol refers to important information about the product, its handling,
or additional use.
✱ Action instruction
This symbol indicates that an action to be performed is described.
6
2 General information
2.1 Preface
Read through this document carefully and familiarize yourself with the operation of the device before you start using it. Keep this document close at hand
and in the immediate vicinity of the device so that you or the specialist personnel can consult it at all times in case of doubt.
Mounting, startup, operation, maintenance, and decommissioning must only
be performed by personnel with a specialist qualification. The specialist personnel must have carefully read through and understood the operating manual
prior to commencing any work.
The liability and warranty of the manufacturer for damage and consequential
damage is rendered void in the event of improper use, failure to observe this
operating manual, deployment of personnel with insufficient qualifications,
and unauthorized modifications to the device.
The manufacturer is not liable for costs or damages incurred by the user or by
third parties through the use of this device, particularly in the event of
improper use of the device or in the event of misuse or malfunctions relating to
the connection or the device.
2.2 Intended use
When used with a securely connected sensor, the device is designed for measuring conductivity, specific electrical resistivity, salt content, and TDS.
The safety information (see chapter 2.3 "Safety information") in this operating
manual must be observed.
The device must only be used under the conditions or for the purposes for
which it has been designed.
The device must be handled with care, protected against pollutants, and used
according to the technical data.
2.3 Safety information
The device has been built and tested according to the safety regulations for
electrical measuring devices. Please observe the customary safety precautions and the device-specific safety information in this operating manual.
DANGER!
If it is assumed that risk-free operation of the device is no longer possible, the
device must be decommissioned and guarded against subsequent startup by
means of an identification marking. The safety of the user may be compromised by the device if, for example, the device
• features visible damage,
• no longer operates in the specified manner,
• has been stored in unsuitable conditions for an extended period of time.
In case of doubt, send the device to the manufacturer for repair/maintenance
.
7
2 General information
DANGER!
Do not operate with a defective power supply unit!
In this case, potentially fatal excess voltage may occur at the sockets of the
device!
DANGER!
The device is not suitable for safety applications, emergency off equipment,
or applications in which a malfunction could lead to injuries and material
damage.
Failure to observe this note may lead to serious damage to health and material damage!
DANGER!
This device must not be used in a potentially explosive environment. If the
device is operated in a potentially explosive environment, there is an
increased hazard of deflagration, fire, or explosion due to formation of sparks!
NOTE!
The function and operational safety of the device can only be maintained
under the climatic conditions specified in chapter Chapter 11 "Technical
data", page 40.
If the device is transported from a cold environment to a warm environment,
the device may malfunction due to condensate formation. In this case, it is
necessary to wait for the device temperature to align with the room temperature prior to startup.
NOTE!
When connecting to other devices, take particular care in planning the wiring.
Under certain circumstances, internal connections in third-party devices (e.g.
connection of GND to ground) may lead to impermissible voltage potentials
that can cause impaired function or even destruction of the device itself or a
connected device.
NOTE!
Please do not connect any devices to socket 1 (see Chapter 4.3 "Con-
nections", page 12)!
2 General information
8
2.4 Notes on operation and maintenance
2.4.1 Battery operation
2.4.2 Power supply unit operation
NOTE!
The device and sensor must be handled with care and used according to the
technical data (do not throw, do not subject to impact, etc.). The connectors
and sockets must be protected against pollutants.
NOTE!
If is displayed at the same time as "bAt" is shown in the bottom display,
the battery has been used up and must be replaced. However, the device
function remains guaranteed for a certain period of time.
If "bAt" is shown in the top display, the battery voltage is no longer sufficient
for device operation and the battery is now completely used up.
NOTE!
The battery must be removed if the device is stored at an ambient temperature of over 50 °C. The battery should be removed if the device is not used for
an extended period of time.
It is necessary to set the real-time clock once again after subsequent startup.
CAUTION!
When a power supply unit is connected, its voltage must be between
DC 10.5 V and 12 V. Do not generate any excess voltage! Basic power supply
units may feature excess open circuit voltage, which may lead to malfunction
or destruction of the device!
Prior to connecting the power supply unit to the electricity grid, it must be
ensured that the operating voltage stated on the power supply unit corresponds to the mains voltage.
9
3 Identifying the device version
3.1 Nameplate
Position
The nameplate is affixed to the base of the battery compartment.
Example
Fabrication number (F-No.)
The fabrication number provides information such as the production date
(year/week). The production date relates to the characters in positions 12 to 15
(from the left).
Example: F-No. = 00822713 01 0 1815 0001
The device was produced in the 15th calendar week of 2018.
3.2 Order details
Handmessgerät 202710/30 – 000
F – Nr. 00822713 01 0 1815 0001
(1) Basic type
202710/30 Manual measuring device for conductivity (CR), specific
electrical resistivity, TDS, and salinity
(2) Extra codes
000 None
071 Including carry case
(1) (2)
Order code /
Order example 202710/30 / 000
10
4 Operation
4.1 Display
(1) Display of the measured value unit
(2) Warning signal:
In case of low battery or recalibration request
(3) Temperature coefficient configuration unit
(4) Subsidiary display/subsidiary measured value:
Temperature measured value
(5) Display of the selected temperature compensation
(6) Display elements for the appearance of the minimum (MIN),
maximum (MAX), or saved measured value (HLD)
a
a
The "DIF" display is not supported in this device.
(7) Main display/main measured value:
Conductivity (mS/cm, µS/cm)
specific electrical resistivity (k
Ω
cm)
TDS/filtrate dry residue (mg/l)
Salinity (SAL)
6$/ PJO N2KP P6 6
/LQ/LQ Q/)Q/) $/ /RJJ . FP
0$; ',)
0,1 +/ '
)
11
4 Operation
4.2 Control elements
The descriptions printed in black on the control keys relate to functions that
are available in measurement mode.
The descriptions and symbols printed in red on the control keys relate to functions that are available when setting the device.
Key Function
during the measurement
Function
in setting menu
On/off switch
min/max...
... pressed briefly:
Display minimum or maximum
value measured so far
... pressed for 2 seconds:
Delete the value in
question
/
Enter values or modify settings
CAL...
... pressed for 2 seconds:
Start calibration of the
relative cell constants
(only possible in operating
mode "cond" = conductivity)
"Scroll" through the parameter
sublevels of the submenu
Store:
Hold and save the
current measured value
("HLD" in display)
Quit:
Return to measuring, entries/
settings will be saved
Set...
... pressed briefly:
Toggle between units (only possible when setting the parameter "InP" to the value "SEt")
... pressed for 2 seconds:
Call up the setting menu
Menu:
Return to setting menu, entries/
settings will be saved
ON
OFF
1
5
min
max
2
CAL
3
6
Store
Quit
4
Set
Menu
4 Operation
12
4.3 Connections
4.4 Stand-up hinge
Operation: ✱ Pull on the "open" lettering to fold out the stand-up hinge to a position of
90 ° (1). Pull on the "open" lettering again to fold out the stand-up hinge to
a position of 180 ° (2).
Functions: When the stand-up hinge is closed, the device can be laid flat on the table or
secured on a belt.
When the stand-up hinge is at a position of 90 °, the device can be set up on
an even surface.
When the stand-up hinge is at a position of 180 °, the device can be hung on
a hook, for example.
(1)
This socket does not have a function, please do not connect any devices
(2) Connecting cable of the securely connected conductivity measuring cell
(3) Socket for connecting a power supply unit
Stand-up hinge closed
Stand-up hinge positioned at 90°/180°
13
5 Measuring
5.1 The measuring cell
The conductivity measurement is a relatively straightforward measurement.
The measuring cell that is securely connected to the device remains stable for
a long time when properly used and can be aligned using the integrated calibration function (see chapter 7.2, page 33).
Use
For measuring purposes, the measuring cell must be immersed in the measurement medium to a minimum depth of 30 mm and a maximum depth of
110 mm.
The measuring cell can be stored dry or standing in clean water.
A measuring cell that has been stored under dry conditions requires a slightly
longer time to display a stable measured value than a measuring cell that has
been stored under wet conditions.
Before the measuring cell is moved into a liquid with a significantly different
conductivity, it should be rinsed and the residual moisture should be captured
with an absorbent cloth or paper.
If an unexpectedly high or low conductivity is measured, this can be traced
back to pollutants on the electrodes. In this case, the measuring cell can be
cleaned with an aqueous detergent solution.
NOTE!
Never bring the measuring cell into contact with water-repellent substances
such as oil or silicone.
When performing measurements in measurement media with low conductivity,
it is necessary to ensure sufficient flow to the electrodes.
5 Measuring
14
5.2 Switching on the device
✱ Briefly press the key.
If a correction of the relative cell constant (see chapter 7.2, page 33) has been
performed, the device accordingly provides a brief display of " " and the
set relative cell constant after the segment test.
If a zero point correction (offset) or slope correction has been performed on
the temperature sensor (see chapter 7.1, page 33), the device accordingly provides a brief display of " " after the segment test.
The device is subsequently ready to commence measuring.
5.3 Measuring the conductivity
Definition
Conductivity
1
is the ability of a material or an electrolyte to conduct electric
current.
In aqueous solutions (electrolytes), the current flows through the charge trans-
port of the ions dissolved in the electrolyte. The conductivity measurement is
therefore excellently suited to determining the concentration of saline solutions, acids, and lyes.
The conductivity is the reciprocal of the specific electrical resistivity and is
stated by the device in µS/cm or mS/cm.
Select the measurand
The device is preconfigured per default for measuring the conductivity
with automatic selection of the measuring range (Auto Range).
If the device has been configured for a different measurand in a userdefined operation, first change the measurand (see "Parameter "InP":
selection of a measurand", page 21).
If the measuring range is selected automatically, the measuring range with the
best dissolution is always selected from the measuring ranges listed.
NOTE!
The device is preconfigured per default for measuring the conductivity
with automatic selection of the measuring range (Auto Range).
The device activates all display segments
for a short time (segment test).
1
Specifically relates to electrical conductivity here
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