Operating manual
AR
O
RCL
STO
C
A
L
AR
S
/
cm
Tref25
nLF
0
5
2
3
0
5
°
C
TP
M
handylab LF 12
ba75367d04 01/2011
Conductivity Meter
handylab LF 12
Accuracy when
going to press
Warranty We guarantee the instrument described for 3 years from the date of
The use of advanced technology and the high quality standard of our
instruments are the result of continuous development. This may result
in differences between this operating manual and your instrument. Also, we cannot guarantee that there are absolutely no errors in this manual. Therefore, we are sure you will understand that we cannot accept
any legal claims resulting from the data, figures or descriptions.
purchase.
The instrument warranty covers manufacturing faults that are discovered within the warranty period. The warranty does not cover components that are replaced during maintenance work, e.g. batteries.
The warranty claim extends to restoring the instrument to readiness for
use but not, however, to any further claim for damages. Improper handling or unauthorized opening of the instrument invalidates any warranty claim.
Copyright
© 2011, SI Analytics GmbH
Reproduction in whole - or even in part - is prohibited without the
express written permission of SI Analytics GmbH, Mainz.
Printed in Germany.
2
ba75367d04 01/2011
handylab LF 12 List of contents
handylab LF 12 - List of contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Switching on the measuring instrument . . . . . . . . . . . . . . . . . 17
4.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.2 Conductivity / Resistivity . . . . . . . . . . . . . . . . . . . . . . . 19
4.2.3 Salinity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2.4 TDS (Total dissolved solids) . . . . . . . . . . . . . . . . . . . . 20
4.3 Determining/setting up the cell constant [C] . . . . . . . . . . . . . . 22
4.3.1 Determining the cell constant
(calibrating in the control standard) . . . . . . . . . . . . . . 23
4.3.2 Setting the cell constant manually . . . . . . . . . . . . . . . 25
4.3.3 Setting the temperature compensation TC . . . . . . . . . 28
4.4 Saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.4.1 Saving manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.4.2 Saving automatically . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.4.3 Outputting the data storage . . . . . . . . . . . . . . . . . . . . 36
4.4.4 Clearing the memory . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.5 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.5.1 Data transmission interval (Int 2) . . . . . . . . . . . . . . . . 41
4.5.2 Recorder (analog output) . . . . . . . . . . . . . . . . . . . . . . 43
4.5.3 PC/external printer (RS232 interface) . . . . . . . . . . . . 44
4.5.4 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.6 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.7 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
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5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . . . . . 51
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
3
List of contents handylab LF 12
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4
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handylab LF 12 Overview
AR
O
RCL
STO
C
A
L
AR
S
/
cm
Tref25
nLF
0
5
2
3
0
5
°
C
TP
1
2
3
M
1 Overview
The compact precision handheld meter handylab LF 12 enables you to carry
out conductivity measurements rapidly and reliably.
The handylab LF 12 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications.
The proven procedure for adjusting or setting the cell constant and the special AutoRead function support you in your work with the handylab LF 12.
1 Keypad
2 Sample display
3 Jack field
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5
Overview handylab LF 12
CAL
STO
RUN/ENTER
ARRCL
M
M
STO
CAL
RCL
AR
RUN/ENTER
1.1 Keypad
Key functions
Select the measuring mode <M>:
– Conductivity/Resistivity
– Salinity
– Total dissolved solids (TDS)
Save a measured value
<STO>
Switch measuring instrument on/off
<ON/OFF>
– Determine or set up the cell constant
– Select temperature compensation
<CAL>
Display/transmit measured values
<RCL>
Activate/deactivate the AutoRead function
<AR>
Increase values, scroll
<V >
6
Decrease values, scroll
<W >
Confirm entries, start AutoRead
<RUN/ENTER>
ba75367e04 01/2011
handylab LF 12 Overview
S
AutoCal DIN
AutoCal TEC
%
mV/pH
Sal
°
F
mbar
OUpH
RCL
8
8.
8
8
8
8
°
LoBat
Cal
ARng
AR
TP
1
m
S/
cm
Sal
cm
1/
C
%
/
K
Tref25
Tref20
Lin
nLF
Time
Baud
Day.Month No.
Ident
Year
Auto
Store
TDS
mg/l
M
cm
Status display
Meas. value display
Function and
temperature display
Sensor symbol
3
1
2
1.2 Display
1.3 Jack field
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1 Conductivity measuring cell
2 Plug-in power supply (optional)
3 Serial Interface RS 232 / analog output (recorder)
Caution
Only connect conductivity measuring cells to the measuring instrument that
cannot return any voltages or currents that are not allowed
(> SELV and > current circuit with current limiting).
Nearly all measuring cells - especially SI Analytics measuring cells - fulfill
these conditions.
7
Overview handylab LF 12
1.4 Technical Data
Dimensions
and weight
Mechanical
structure
Electrical safety
Test certificates
Ambient
conditions
Length [mm] 172
Width [mm] 80
Height [mm] 37
Weight [kg] Approx. 0.3
Type of protection IP 66
Protective class III
cETLus, CE
Storage - 25 °C ... + 65 °C
Operation -10 °C ... + 55 °C
Relative atmospheric
< 90 % of annual average
humidity
Measuring ranges
ϰ [µS/cm]
0.000 ... 1.999
(only for cell constant = 0.010 cm
-1
)
0.00 ... 19.99
(only at a cell const. = 0.010 cm
cell const. = 0.090 ... 0.110 cm
-1
-1
and
)
0.0 ... 199.9
0 ... 1999
ϰ [mS/cm]
0.00 ... 19.99
0.0 ... 199.9
0 ... 500
Spec. resistance
[MΩ*cm]
0.000 ... 1.999
0.00 ... 19.99
0.0 ... 199.9
0 ... 1999
SAL 0.0 ... 70.0 according to the IOT table
TDS [mg/l] 0 ... 1999
Factor can be set to between 0.40 ... 1.00
T [°C] − 5.0 ... + 105.0
8
ba75367e04 01/2011
handylab LF 12 Overview
Accuracy
(±1 digit)
ϰ ,
Resistivity
No compensation: 0.5 %
Nonlinear compensation :
Precision Sample temperature
± 0.5 % 0 °C ... 35 °C
according to EN 27 888;
± 0.5 % 35 °C ... 50 °C
extended nLF function
Linear compensation
Accuracy Sample temperature
± 0.5 % 10 °C ... 75 °C
(The accuracy percentage always refers to
the measured value.)
SAL Range 0.0 ... 42.0
Accuracy Sample temperature
± 0.1 5 °C ... 25 °C
± 0.2 25 °C ... 30 °C
Cell constant,
calibration
Cell constant,
selection
Reference
temperature
TDS [mg/l] 1
T [°C] NTC 30:
Accuracy ± 0.1
PT 1000:
Accuracy Operating temperature
± 0.5 0 °C ... 15 °C
± 0.1 5 °C ... 35 °C
± 1 35 °C ... 55 °C
C [cm-1] 0.450 ... 0.500
0.800 ... 1.200
C [cm-1] 0.010 fixed
0.090 ... 0.110
0.250 ... 2.500
Tref Can be set to 20 °C or 25 °C
Temperature input
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Manual [°C] -5 ... +100
9
Overview handylab LF 12
Analog output Automatic switchover when a recorder is connected.
Output signal 0 ... 1.999 V for range 0 ... 1999 digits
Accuracy ± 0.5 % of display value
Internal resistance < 5 Ohm (curr
ent limited to max. 0.2 mA output current)
Serial interface Automatic switchover when a PC or printer is connected.
Type RS232, data output
Baud rate Can be set to
1200, 2400, 4800, 9600 Baud
Data bits 8
Stop bit 2
Parity None
Handshake RTS/CTS + Xon/Xoff
Cable length Max. 15 m
10
ba75367e04 01/2011
handylab LF 12 Overview
FCC Class A Equipment Statement
Note: This equipment has been tested and found to comply with
the limits for a Class A digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is
operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to
correct the interference at his own expense.
Power supply
Batteries 4 x 1.5 V alkali-manganese batteries, Type
AA
Operational life Approx. 2500 operating hours (depending
on conductivity)
Mains FRIWO FW7555M/09, 15.1432.500-00
Friwo Part. No. 1883259
Input: 100 ... 240 V ~ / 50 ... 60 Hz / 400 mA
Output: 9 V = / 1.5 A
Connection max. overvoltage category II
Primary plugs contained in the scope of
delivery: Euro, US, UK and Australian.
Applicable
guidelines and
norms
EMC EC guideline 2004/108/EC
EN 61326-1
EN 61000-3-2
EN 61000-3-3
FCC Class A
Instrument safety EC guideline 2006/95/EC
EN 61010-1
ANSI/UL 61010-1
CAN/CSA-C22.2 No. 61010-1
Climatic class VDI/VDE 3540
Type of protection EN 60529
ba75367e04 01/2011
11
Overview handylab LF 12
12
ba75367e04 01/2011
handylab LF 12 Safety
2Safety
This operating manual contains basic instructions that you must follow during
the commissioning, operation and maintenance of the conductivity measuring instrument. Consequently, all responsible personnel must read this operating manual before working with the measuring system. The operating
manual must always be available within the vicinity of the measuring system.
Target group The measuring instrument was developed for work in the field and in the lab-
oratory.
We assume that, as a result of their professional training and experience, the
operators will know the necessary safety precautions to take when handling
chemicals.
Safety
instructions
Further notes
The individual chapters of this operating manual use safety instructions such
as the label shown below to indicate various hazards or dangers:
Caution
indicates instructions that must be followed precisely in order to avoid the
possibility of slight injuries or damage to the instrument or the environment.
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. operating manuals.
2.1 Authorized use
The authorized use of the measuring instrument consists exclusively of the
measurement of conductivity, salinity, temperature and TDS (total dissolved
solids) in the field and laboratory.
The technical specifications as given in section 1.4 T
observed. Only the operation and running of the measuring instrument according to the instructions given in this operating manual is authorized.
Any other use is considered to be unauthorized.
ECHNICAL DATA must be
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13
Safety handylab LF 12
2.2 General safety instructions
This instrument is built and inspected according to the relevant guidelines
and norms for electronic measuring instruments (see section 1.4 T
D
ATA).
It left the factory in a safe and secure technical condition.
ECHNICAL
Function and oper-
ating safety
The smooth functioning and operational safety of the measuring instrument
can only be guaranteed if the generally applicable safety measures and the
specific safety instructions in this operating manual are followed during operation.
The smooth functioning and operational safety of the measuring instrument
can only be guaranteed under the environmental conditions that are specified
in section 1.4 T
ECHNICAL DATA.
If the instrument was transported from a cold environment to a warm environment, the formation of condensate can lead to the faulty functioning of the instrument. In this event, wait until the temperature of the instrument reaches
room temperature before putting the instrument back into operation.
Safe operation If safe operation is no longer possible, the instrument must be taken out of
service and secured against inadvertent operation!
Safe operation is no longer possible if the measuring instrument:
z has been damaged in transport
z has been stored under adverse conditions for a lengthy period of time
z is visibly damaged
Obligations of the
purchaser
z no longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the instrument.
The purchaser of the measuring instrument must ensure that the following
laws and guidelines are observed when using dangerous substances:
z EEC directives for protective labor legislation
z National protective labor legislation
z Safety regulations
z Safety datasheets of the chemical manufacturers.
14
ba75367e04 01/2011
handylab LF 12 Commissioning
3 Commissioning
3.1 Scope of delivery
z Handheld meter, handylab LF 12
z Operating manual and short operating manual
z 4 batteries, 1.5 V Mignon type AA (in the instrument)
3.2 Initial commissioning
Perform the following activities:
z Set the date and time
z Connect the plug-in power supply, optional.
Setting the date
and time
1 Press the <M> key and hold it down.
2 Press the <ON/OFF> key.
The display test appears briefly on the display.
3 Press the <RUN/ENTER> key repeatedly until the date ap-
pears on the display.
4 Set the date of the current day with <V> <W>.
5 Confirm with <RUN/ENTER>.
The date (month) flashes in the display.
6 Set the current month with <V> <W>.
7 Confirm with <RUN/ENTER>.
The year appears on the display.
8 Set the current year with <V> <W>.
9 Confirm with <RUN/ENTER>.
The hours flash on the display.
10 Set the current time with <V> <W>.
11 Confirm with <RUN/ENTER>.
The minutes flash on the display.
ba75367e04 01/2011
12 Set the current time with <V> <W>.
13 Confirm with <RUN/ENTER>.
The instrument switches to the measuring mode.
15
Commissioning handylab LF 12
1
2
3
Connecting the
plug-in power
supply (option)
You can either operate the measuring instrument with batteries or with the
plug-in power supply. The plug-in power supply supplies the measuring instrument with low voltage (12 V DC). This saves the batteries.
Caution
The line voltage at the operating site must lie within the input voltage range
of the original plug-in power supply (see
section 1.4 T
ECHNICAL DATA).
Caution
Use original plug-in power supplies only (see
section 1.4 T
ECHNICAL DATA).
1 Plug the jack (1) into the socket (2) of the measuring instru-
ment.
2 Connect the original SI Analytics plug-in power supply (3) to an
easily accessible mains socket.
Note
You can also measure without the plug-in power supply.
16
ba75367e04 01/2011
handylab LF 12 Operation
4 Operation
4.1 Switching on the measuring instrument
1 Connect a conductivity measuring cell to the measuring instru-
ment.
2 Press the <ON/OFF> key.
The display test appears briefly on the display.
Subsequently, the selected cell constant and the temperature
compensation that was set up appear for approx. one second
one after the other.
The measuring instrument then automatically switches to the
measuring mode that was last selected.
Note
The measuring instrument has an energy saving feature to avoid unnecessary battery depletion. The energy saving feature switches the measuring instrument off if no key has been pressed for an hour. The energy saving
feature is not active when the AutoStore function is active.
The energy saving feature is also not active
z if the power is supplied by the plug-in power supply,
z if the communication cable and a PC with a running communication pro-
gram are connected,
z if the recorder cable is connected,
z if the printer cable is connected (for external printers).
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17
Operation handylab LF 12
4.2 Measuring
4.2.1 General information
Preparatory
activities
Temperature
sensor
Perform the following preparatory activities when you want to measure:
1 Connect the conductivity measuring cell to the measuring in-
strument.
2 In conjunction with the measuring cell, check or calibrate the
measuring instument. How to calibrate is described in section
4.3.
3 Select the measuring mode with <M>.
Caution
When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result. The RS232 interface is not galvanically isolated.
Only carry out measurements with a temperature sensor. The temperature
sensor is shown on the display by TP.
Note
The conductivity measuring instrument automatically recognizes the type of
the temperature sensor used. This enables to connect measuring cells with
the NTC30 or Pt1000.
Temperature
compensation
Reference
temperature, Tref
The instrument has a nonlinear temperature compensation that can be
switched off (see section 4.3.3 S
ETTING THE TEMPERATURE COMPENSATION
TC).
The reference temperature (Tref) can be switched between 20 °C and 25 °C.
It appears on the display as Tref20 or Tref25. To switch over the reference
temperature, see section 4.6 C
ONFIGURATION.
18
ba75367e04 01/2011
handylab LF 12 Operation
AR
8
1
cm
1/
/
K
%
°
F
ARng
RCL
Cal
Lin
Tref20
LoBat
M
m
Sal
TDS
S
Auto
Store
Sal
mbar
%
mg/l
OUpH
mV/pH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
0
5
2
3
0
5
°
TP
S/
cm
C
Tref25
nLF
m
%
mg/l
S/
cm
S
AR
8
cm
1/
/
K
%
°
F
ARng
RCL
Cal
Lin
Tref20
LoBat
Sal
TDS
Auto
Store
Sal
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
0
5
2
8
6
8
°
TP
C
Tref25
nLF
1
M
cm
4.2.2 Conductivity / Resistivity
Note
You can display measured values in the units μS/cm (conductivity) or MΩcm
(resistivity). This setting is described in section 4.6 C
Thus, you can carry out conductivity measurements or measurements of the
resistivity:
1 Perform the preparatory activities according to section 4.2.1.
2 Immerse the conductivity measuring cell in the test sample.
3 Press the <M> key until ϰ appears on the status display. De-
pending on the setting, one of the following display indicators
appears on the display:
Conductivity
μS/cm
ONFIGURATION.
Resistivity
MΩ⋅cm
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4 Wait for a stable measured value.
19
Operation handylab LF 12
Tref25
/
K
cm
1/
°
F
%
8
mg/l
1
RCL
ARng
AR
LoBat
Cal
Tref20
Lin
m
S/
cm
M
TDS
S
Auto
Store
Sal
mbar
%
OUpH
mV/pH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
2
1
2
2
3
3
°
TP
Sal
C
nLF
4.2.3 Salinity
You can measure the salinity as follows:
1 Perform the preparatory activities according to section 4.2.1.
2 Immerse the conductivity measuring cell in the test sample.
3 Press the <M> key until Sal appears on the status display. The
salinity value appears on the display.
4 Wait for a stable measured value.
4.2.4 TDS (Total dissolved solids)
You can measure the total dissolved solids as follows:
1 Perform the preparatory activities according to section 4.2.1.
2 Immerse the conductivity measuring cell in the test sample.
3 Press the <M> key until TDS appears on the status display.
The value of the total dissolved solids appears in the upper display line. The TDS factor appears in the lower display line.
20
4 Using <V> <W>, set the TDS factor (0.40 ... 1.00).
(The TDS factor has to be determined by a comparison measurement before.)
ba75367e04 01/2011
handylab LF 12 Operation
8
1
cm
1/
/
K
%
°
F
ARng
RCL
Cal
Lin
Tref20
LoBat
M
m
Sal
TDS
S
Auto
Store
Sal
mbar
%
mg/l
OUpH
mV/pH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
0
5
2
3
0
5
°
AR
TP
S/
cm
C
Tref25
nLF
5 Wait for a stable measured value.
AutoRead AR
(drift control)
The AutoRead function (drift control) checks the stability of the measurement
signal. The stability has a considerable effect on the reproducibility of the
measured value.
1 Select the required measuring mode with <M>.
2 Activate the AutoRead function with <AR>.
The current measured value is frozen (hold function).
3 Start AutoRead with <RUN/ENTER>.
AR flashes until a stable measured value is reached.
ba75367e04 01/2011
4 If necessary, start the next AutoRead measurement with
<RUN/ENTER>.
5 To terminate AutoRead: Press the <AR> key.
Note
The current AutoRead measurement can be terminated at any time (accepting the current value) by pressing <RUN/ENTER>.
21
Operation handylab LF 12
CALIBRATION PROTOCOL
14.04.01 11:37
Device No.: 99990000
Calibration Conductivity
Cal time: 14.04.01 / 11:37
Cal interval: 180d
Cal Std.: 0.01 mol/l KCL
40.0 °C
Conduct./Tref25: 1413µS/cm
Cell Const : 0.478 1/cm
Probe : +++
4.3 Determining/setting up the cell constant [C]
Why determine/set
up the cell
constant?
Procedure The cell constant is determined in the control standard, 0.01 mol/l KCl.
Aging slightly changes the characteristics of the cell, e. g. by coatings. As a
result, an inexact measured value is displayed. The original characteristics of
the cell can often be restored by cleaning the cell. Calibration determines the
current cell constant and stores it in the instrument.
Thus, you should calibrate at regular intervals (we recommend: every 6
months).
You can determine the actual cell constant of the conductivity measuring cell
by calibrating with the control standard in the following ranges:
z 0.450 ... 0.500 cm
z 0.800 ... 1.200 cm
-1
-1
Besides, you can set the cell constant manually in the following ranges:
z 0.090 ... 0.110 cm
z 0.250 ... 2.500 cm
-1
-1
The fixed cell constant, 0.010 cm-1 can also be selected. It is not necessary
to calibrate or adjust it.
Cell constants outside the above mentioned ranges cannot be calibrated.
Printing the
calibration
record
Calibration
22
evaluation
The calibration protocol contains the calibration data of the current calibration.
You can transmit the calibration protocol to a printer via the serial interface
(see page 39).
Note
You can automatically print a calibration protocol after the calibration. To do
so, connect a printer to the interface according to section 4.5.3 before calibrating. After a valid calibration, the record is printed.
Sample printout:
After the calibration, the measuring instrument automatically evaluates the
current status of the calibration. The evaluation appears on the display.
ba75367e04 01/2011
handylab LF 12 Operation
OUpH
L
F
Sal
Store
RCL
AR
Auto
AutoCal DIN
AutoCal TEC
LoBat
Cal
ARng
Tref25
Tref20
Lin
nLF
Sal
%
mg/l
mV/pH
cm
°
°
TP
m
S/
cm
cm
1/
F
C
%
/
K
M
TDS
8
1
S
mbar
Time
Baud
Day.Month No.
Ident
Year
L
CL
E
-1
Display Cell constant [cm
0.450 ... 0.500 cm
0.800 ... 1.200 cm
]
-1
-1
outside the ranges
E3
Eliminate the error according to
chapter 6 W
4.3.1 Determining the cell constant
Note
This method of automatically determining the cell constant by calibration with
the 0.01 mol/l KCL standard solution can only be used for measuring cells
with cell constants in the range 0.450 ... 0.500 cm
This is how you can determine the cell constant:
1 Press the <CAL> key until CELL appears on the display.
HAT TO DO IF...
(calibrating in the control standard)
0.450 ... 0.500 cm
or
0.800 ... 1.200 cm
-1
-1
-1
or 0.800 ... 1.200 cm-1.
ba75367e04 01/2011
2 Press the <RUN/ENTER> key.
3 Press the <CAL> key repeatedly, until the calibrated cell con-
stant appears on the display: CAL appears on the display.
23
Operation handylab LF 12
A
L
C
S
1
LoBat
Lin
nLF
Tref20
RCL
ARng
AR
°
°
TP
F
C
%
/
K
M
%
mg/l
mV/pH
m
S/
cm
Sal
TDS
Auto
Store
Sal
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
5
0 7
4
Cal
cm
1/
Tref25
A
L
C
1
LoBat
Lin
nLF
Tref20
RCL
ARng
°
°
TP
F
C
%
/
K
M
%
mg/l
mV/pH
m
S/
cm
Sal
TDS
S
Auto
Store
Sal
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
6
0 7
4
Cal
cm
1/
Tref25
AR
4 The displayed value is the current, calibrated cell constant. You
can:
– accept this setting for measuring with <M> or
– continue with step 5 and start a new calibration.
5 Immerse the measuring cell in the control standard solution,
0.01 mol/KCl.
6 Press the <RUN/ENTER> key.
– If no temperature sensor is connected, enter the current
temperature of the solution with <V> <W>
and confirm with <RUN/ENTER>.
– If a temperature sensor is connected, the AR measurement
to determine the cell constant starts.
The AR display indicator flashes until a stable signal is
reached. The cell constant determined is displayed. The measuring instrument automatically stores the cell constant.
Note
If the error message E3 appears, refer to chapter 6 W
HAT TO DO IF...
24
ba75367e04 01/2011
handylab LF 12 Operation
OUpH
L
F
Sal
Store
RCL
AR
Auto
AutoCal DIN
AutoCal TEC
LoBat
Cal
ARng
Tref25
Tref20
Lin
nLF
Sal
%
mg/l
mV/pH
cm
°
°
TP
m
S/
cm
cm
1/
F
C
%
/
K
M
TDS
8
1
S
mbar
Time
Baud
Day.Month No.
Ident
Year
L
CL
E
Cal
1
LoBat
Lin
Tref20
RCL
AR
°
°
TP
F
C
%
/
K
M
%
mg/l
mV/pH
m
Sal
TDS
S
Auto
Store
Sal
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
8
0 7
2
2
8
4
cm
1/
S/
cm
Tref25
nLF
ARng
Cal
1
LoBat
Lin
Tref20
RCL
AR
°
°
TP
F
C
%
/
K
M
%
mg/l
mV/pH
m
Sal
TDS
S
Auto
Store
Sal
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
4
0 1
6
8
0
6
cm
1/
S/
cm
Tref25
nLF
ARng
4.3.2 Setting the cell constant manually
Note
The cell constant to be set must either be taken from the operating manual of
the measuring cell or is printed on the measuring cell.
You can set the cell constant manually as follows:
Range
0.250 ... 2.500 cm
-1
1 Press the <CAL> key repeatedly until CELL appears on the
display.
2 Press the <RUN/ENTER> key.
3 Press the <CAL> repeatedly until the adjustable cell constant,
e.g. 0.278 cm
-1
appears.
ba75367e04 01/2011
4 Set the cell constant to be used with <V> <W> , e.g.
0.614 cm
-1
.
25
Operation handylab LF 12
OUpH
L
F
Sal
Store
RCL
AR
Auto
AutoCal DIN
AutoCal TEC
LoBat
Cal
ARng
Tref25
Tref20
Lin
nLF
Sal
%
mg/l
mV/pH
cm
°
°
TP
m
S/
cm
cm
1/
F
C
%
/
K
M
TDS
8
1
S
mbar
Time
Baud
Day.Month No.
Ident
Year
L
CL
E
Cal
1
LoBat
Lin
Tref20
RCL
AR
°
°
TP
F
C
%
/
K
M
%
mg/l
mV/pH
m
Sal
TDS
S
Auto
Store
Sal
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
0
00
1
2
5
9
cm
1/
S/
cm
Tref25
nLF
ARng
Range
0.090 ... 0.110 cm
5 To return to the measuring mode: Press the <M> key.
From now on, the cell constant 0.614 cm
-1
1 Press the <CAL> key repeatedly until CELL appears on the
display.
2 Press the <RUN/ENTER> key.
3 Press the <CAL> key repeatedly until a cell constant in the
range 0.090 ... 0.110 cm
-1
appears on the display.
-1
will be used.
26
4 Set the cell constant to be used with <V> <W> , e.g.
0.105 cm
5 To return to the measuring mode: Press the <M> key. Now this
setting is accepted for measuring.
-1
.
ba75367e04 01/2011
handylab LF 12 Operation
OUpH
L
F
Sal
Store
RCL
AR
Auto
AutoCal DIN
AutoCal TEC
LoBat
Cal
ARng
Tref25
Tref20
Lin
nLF
Sal
%
mg/l
mV/pH
cm
°
°
TP
m
S/
cm
cm
1/
F
C
%
/
K
M
TDS
8
1
S
mbar
Time
Baud
Day.Month No.
Ident
Year
L
CL
E
Cal
1
LoBat
Lin
Tref20
RCL
AR
°
°
TP
F
C
%
/
K
M
%
mg/l
mV/pH
m
Sal
TDS
S
Auto
Store
Sal
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
0
0 1
0
2
5
9
cm
1/
S/
cm
Tref25
nLF
ARng
Setting the fixed
cell constant
0.010 cm
You can set the fixed value 0.010 cm-1 for the cell constant as follows:
-1
1 Press the <CAL> key repeatedly until CELL appears on the
display.
2 Press the <RUN/ENTER> key.
3 Press the <CAL> key repeatedly until the cell constant
0.010 cm
-1
appears on the display.
ba75367e04 01/2011
4 To return to the measuring mode: Press the <M> key.
From now on, the cell constant 0.010 cm
-1
will be used.
27
Operation handylab LF 12
4.3.3 Setting the temperature compensation TC
The calculation of the temperature compensation is based on the preset reference temperature, Tref 20 or Tref 25 (see section 4.6 C
ONFIGURATION).
You can select one of the following temperature compensation methods:
z Nonlinear temperature compensation (nLF)
according to EN 27 888
z Linear temperature compensation (Lin)
with selectable coefficients of 0.001 ... 3.000 %
/K
z No temperature compensation (- - - -)
Note
ips Select the following temperature compensations given in the table according
to the respective test sample:
Application tips
Test sample Temperature
compensation (TC)
Natural water
(ground water, surface water and drinking water)
nLF
according to DIN 38404
EN 27 888
Ultrapure water nLF
according to DIN 38404
EN 27 888
Other aqueous solutions Set linear temperature
coefficient
0.001 ... 3.000 %/K
Salinity (seawater) Automatically nLF ac-
cording to IOT
Display
indicator
Sal,
28
ba75367e04 01/2011
handylab LF 12 Operation
OUpH
L
F
C
E
Store
RCL
AR
Auto
AutoCal DIN
AutoCal TEC
LoBat
Cal
ARng
Tref25
Tref20
Lin
nLF
Sal
%
mg/l
mV/pH
cm
°
°
TP
m
S/
cm
cm
1/
F
C
%
/
K
M
TDS
Sal
8
1
S
mbar
Time
Baud
Day.Month No.
Ident
Year
c
t
mg/l
AR
Store
O Sal
TDS
°
C
TP
/
K
cm
1/
°
F
%
8
1
RCL
LoBat
Cal
Tref20
Lin
m
M
S
Auto
Sal
mbar
%
UpH
mV/pH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
F
L
n
8
4
6
nLF
Tref25
ARng
S/
cm
Selecting the
noninear
temperature
comensation
You can select the nonlinear temperature compensation as follows:
1 Press the <CAL> key repeatedly until tc appears on the dis-
play.
2 Press the <RUN/ENTER> key.
3 Press the <CAL> key repeatedly until nLF appears on the dis-
play.
ba75367e04 01/2011
4 To return to the measuring mode: Press the <M> key. From
now on, nLF will be used for the temperature compensation.
29
Operation handylab LF 12
OUpH
L
F
C
E
Store
RCL
AR
Auto
AutoCal DIN
AutoCal TEC
LoBat
Cal
ARng
Tref25
Tref20
Lin
nLF
Sal
%
mg/l
mV/pH
cm
°
°
TP
m
S/
cm
cm
1/
F
C
%
/
K
M
TDS
Sal
8
1
S
mbar
Time
Baud
Day.Month No.
Ident
Year
c
t
S
nLF
TP
C
°
F
cm
1/
Cal
LoBat
Tref20
RCL
AR
°
M
%
mg/l
mV/pH
m
Sal
TDS
Auto
Store
Sal
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
0
20
0
2
4
2
S/
cm
Tref25
ARng
%
/
K
Lin
1
S
nLF
TP
C
°
F
cm
1/
Cal
LoBat
Tref20
RCL
AR
°
M
%
mg/l
mV/pH
m
Sal
TDS
Auto
Store
Sal
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
0
18
8
2
4
2
S/
cm
Tref25
ARng
%
/
K
Lin
1
Selecting the linar
temperature
compensation
You can select the linear temperature compensation as follows:
1 Press the <CAL> key repeatedly until tc appears on the dis-
play.
2 Press the <RUN/ENTER> key.
3 Press the <CAL> key repeatedly until the adjustable linear
temperature coefficient appears on the display.
30
4 Set the temperature coefficient with <V> <W> , e.g. 1.880 %/
K.
5 To return to the measuring mode: Press the <M> key. From
now on, the adjusted linear temperature coefficient will be used
for the temperature compensation.
ba75367e04 01/2011
handylab LF 12 Operation
OUpH
L
F
C
E
Store
RCL
AR
Auto
AutoCal DIN
AutoCal TEC
LoBat
Cal
ARng
Tref25
Tref20
Lin
nLF
Sal
%
mg/l
mV/pH
cm
°
°
TP
m
S/
cm
cm
1/
F
C
%
/
K
M
TDS
Sal
8
1
S
mbar
Time
Baud
Day.Month No.
Ident
Year
c
t
nLF
Cal
Tref20
Tref25
Lin
TP
C
°
%
/
K
S
F
cm
1/
LoBat
RCL
AR
°
M
%
mg/l
mV/pH
m
Sal
TDS
Auto
Store
Sal
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
-
--
-
2
4
2
S/
cm
ARng
1
Switching the
temperature
compensation off
You can switch off the temperature compensation as follows:
1 Press the <CAL> key repeatedly until tc appears on the dis-
play.
2 Press the <RUN/ENTER> key.
3 Press the <CAL> key repeatedly until the following display ap-
pears.
ba75367e04 01/2011
4 The temperature compensation is switched off.
5 To return to the measuring mode: Press the <M> key. From
now on, the instrument will measure without temperature compensation.
31
Operation handylab LF 12
1
0
0
ARng
Sal
cm
1/
Cal
1
LoBat
Lin
Tref20
RCL
AR
°
°
TP
F
C
%
/
K
M
%
mg/l
mV/pH
m
Sal
TDS
S
Auto
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month
Ident
Year
4
5
3
5
S/
cm
Tref25
nLF
No.
Store
4.4 Saving
The measuring instrument has an internal data memory. It can store up to
800 data records.
A complete data record consists of:
z Storage location
z Date/time
z Measured value
z Temperature
z Temperature measuring procedure
z ID number
You can transmit measured values (data records) to the data storage in two
ways:
z Save manually
z Switch on AutoStore (Int 1).
4.4.1 Saving manually
You can transmit a measured value to the data storage as follows:
1 Press the <STO> key.
The current number (location number No.) of the next free storage location appears under the current measured value on the
display.
2 Confirm with <RUN/ENTER>.
The display switches to entering the ID number.
32
ba75367e04 01/2011
handylab LF 12 Operation
No.
1
0
0
ARng
Sal
cm
1/
Cal
1
LoBat
Lin
Tref20
RCL
AR
°
°
TP
F
C
%
/
K
M
%
mg/l
mV/pH
m
Sal
TDS
S
Auto
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month
Year
1
5
3
5
S/
cm
Tref25
nLF
Store
Ident
3 Using <V> <W>, enter the required ID number
(1 ... 999).
4 Confirm with <RUN/ENTER>.
The instrument changes to the measuring mode.
Message StoFull This message appears when all of the 800 storage locations are occupied.
You have the following options:
Saving the current measured value.
The oldest measured value (storage
location 1) will be overwritten by this
Returning to the measuring mode without
saving
Outputting the data storage see
Clearing the memory see
Press
<RUN/ENTER>.
press any key
section 4.4.3
section 4.4.4
ba75367e04 01/2011
33
Operation handylab LF 12
LoBat
Tref25
nLF
/
K
%
RCL
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
S
8
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
F
F
O
t
1
n
1
Store
Auto
4.4.2 Saving automatically
The save interval (Int 1) determines the chronological interval between automatic save processes.
After the fixed interval has expired, the current data record is transmitted to
the storage and to the interface.
Setting the save
interval
The default setting for the save interval (Int 1) is OFF.
By this, the AutoStore function is switched off.
To switch the function on, set an interval (5 s, 10 s, 30 s, 1 min, 5 min, 10 min,
15 min, 30 min, 60 min):
1 Press the <RUN/ENTER> key and hold it down.
2 Press the <STO> key. Int 1 appears on the display.
3 Set the required interval between the saving procedures with
<V> <W>.
34
4 Confirm with <RUN/ENTER>.
The number of free memory locations appears on the display.
5 As soon as all of the 800 storage locations are occupied,
AutoStore is terminated (Int 1 = OFF).
If there are not enough storage locations available for your
measurements:
– Output and backup the data storage (see page 36) and
– clear the memory (see page 40).
ba75367e04 01/2011
handylab LF 12 Operation
e
r
F
9
9
9
S
1
LoBat
Tref25
nLF
/
K
%
RCL
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Year
1
Store
Auto
Ident
6 Confirm with <RUN/ENTER>.
The prompt for the ID number appears on the display.
7 Set the required ID number with <V> <W>.
8 Confirm with <RUN/ENTER>.
The instrument switches to the measuring mode and starts the
measuring and saving process.
AutoStore flashes on the display.
Switching off
AutoStore
Note
The AutoStore function is interrupted if you start other functions, e.g. output
the data storage.
After the function is finished, the AutoStore function is continued. By this,
however, temporal gaps in the recording of the measured values will occur.
Switch AutoStore off by:
z setting the save interval (Int 1) to OFF, or
z switching the measuring instrument off and then on again.
ba75367e04 01/2011
35
Operation handylab LF 12
Store
Auto
Ident
S
1
LoBat
Tref25
nLF
/
K
%
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Year
p
S
T
O
d
I
s
RCL
Ident
AR
Store
Cal
AutoCal DIN
AutoCal TEC
0
No.
ARng
Sal
cm
1/
1
LoBat
Lin
Tref20
°
F
%
/
K
M
%
mg/l
mV/pH
m
Sal
TDS
S
Auto
mbar
OUpH
cm
Time
Baud
Day.Month
Year
5
3
5
S/
cm
Tref25
nLF
5
20
C
°
TP
RCL
4.4.3 Outputting the data storage
You can output the contents of the data storage:
z Stored data on the display
z Calibration data on the display
z Stored data on the serial interface
z Calibration protocol to the interface
Outputting stored
data on the display
1 Press the <RCL> key repeatedly until StO dISP appears on the
display.
2 Press the <RUN/ENTER> key.
A measured value appears on the display.
The storage location of the data record is displayed for approx.
2 s, then the respective temperature appears.
36
You can perform the following activities:
Display further elements of the data record
(ID number, date, time, storage location)
Advance one data record (storage location) Press <V>
Go back one data record (storage location) Press <W>
Press
<RUN/ENTER>.
ba75367e04 01/2011
handylab LF 12 Operation
Store
Auto
Ident
S
1
LoBat
Tref25
nLF
/
K
%
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Year
R
S
t
o
S
E
RCL
Note
If you want to search for a certain element (e.g. date), proceed as follows:
1 Using <RUN/ENTER>, select the element (e.g. date).
2Press <V> or <W> repeatedly until the required date appears
on the display.
After approx. 2 s the temperature of the displayed measured
value appears.
Outputting stored
data to the
interface
1 Press the <RCL> key repeatedly until Sto SEr appears on the
display.
2 Press the <RUN/ENTER> key.
The complete storage content is transmitted to the interface;
during the data transmission the numbers of the currently
transmitted storage locations run through. After the data transmission, the measuring instrument automatically switches to
the measuring mode.
Note
You can cancel the transmission with <M> or <RUN/ENTER>.
ba75367e04 01/2011
After the instrument number, the printout contains the complete storage contents in ascending order of the storage location numbers.
37
Operation handylab LF 12
Device No.: 99990000
No. 1:
01.01.99 00:04
2.40 mS/cm 25 °C
Tman
nLF
Tref25 C = 0.475 1/cm
Ident : 1
No. 2:
10.01.99 10:09
2.40 mS/cm 25.3 °C
Tauto
nLF
Tref25 C = 0.475 1/cm
Ident : 1
No. 3:
12.01.99 01:48
2.40 mS/cm 21.6 °C
Tauto
nLF
Tref25 C = 0.475 1/cm
Ident : 1
...
ARng
ConCal
Store
Auto
0
No.
LoBat
Day.Month
Year
Ident
UpH
AR
%
°F
°C
TP
mV/pH
mol/L
TempError
AutoCal DIN
CalError
AutoCal TEC
Time
Baud
1
S
mg/L
% ppm
ISE
LC
A
pi
s
RCL
d
Sample printout:
Outputting the
calibration data
on the display
1 Press the <RCL> key repeatedly until CAL dISP appears on
the display.
2 Press the <RUN/ENTER> key.
The cell constant on the display, but the CAL display only appears when the displayed value was determined by calibrating
the measuring cell.
38
ba75367e04 01/2011
handylab LF 12 Operation
d
ARng
ConCal
Store
Auto
0
No.
LoBat
Day.Month
Year
Ident
UpH
AR
%
°F
°C
TP
mV/pH
mol/L
TempError
AutoCal DIN
CalError
AutoCal TEC
Time
Baud
1
S
mg/L
% ppm
ISE
LC
A
rs
e
RCL
3 Using <M> or <RUN/ENTER>, you can switch back to the
measuring mode.
Outputting the
calibration
protocol on the
interface
1 Press the <RCL> key repeatedly until CAL appears on the dis-
play.
2 Press the <RUN/ENTER> key.
The calibration protocol is transmitted to the interface.
After the data transmission, the measuring instrument automatically switches to the measuring mode.
Note
You will find a sample calibration protocol in P
CORD, page 22).
RINTING THE CALIBRATION RE-
ba75367e04 01/2011
39
Operation handylab LF 12
RCL
d
Auto
Ident
S
1
LoBat
Tref25
nLF
/
K
%
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Year
r
S
t
o
c
l
Store
4.4.4 Clearing the memory
With this function, you can delete stored data records. 800 storage locations
will then be available again.
Note
The Clear memory function only appears when there are data records stored
in the memory. Otherwise, the measuring instrument automatically switches
to the measuring mode.
Proceed as follows to clear all data records:
1 Switch off the measuring instrument.
2 Press the <STO> key and hold it down.
3 Press the <ON/OFF> key.
The display test appears briefly on the display.
Subsequently, Sto clr appears.
40
4 Confirm the clearing process with <RUN/ENTER>.
Pressing any other key prevents the clearing, the data records
will remain stored.
Note
The calibration data remain stored and can be called up.
ba75367e04 01/2011
handylab LF 12 Operation
4.5 Transmitting data
You have the following possibilities of transmitting data:
z One of the following options:
– With the AutoStore function (page 34), measured values are
periodically saved internally (save interval Int 1) and output on the
interface.
– With the Data transmission interval function (Int 2), measured values
are periodically output on the interface (see below).
z With the Output data storage function (page 36), calibration data or saved
measured values are output on the interface.
z Via the analog recorder output (page 43), measured values are output as
voltage values.
z With a communication kit (accessory), data can be transmitted bidirection-
ally (page 44).
Note
If you connect a recorder (analog output), the output on the digital interface
is switched off.
4.5.1 Data transmission interval (Int 2)
The interval to the data transmission (Int 2) determines the chronological interval between automatic data transmissions. After the selected interval expires, the current data record is transmitted to the interface.
Note
When the AutoStore function is active, the data transmission is performed ac-
cording to the setting of the save interval (Int 1). Set the save interval (Int 1)
to OFF to activate the Data transmission interval (Int 2).
ba75367e04 01/2011
41
Operation handylab LF 12
Store
Auto
LoBat
Tref25
nLF
/
K
%
RCL
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
S
8
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
F
F
O
t
2
n
1
Setting the
Data transmission
interval
The default setting for the interval is OFF.
To start the data transmission, set an interval (5 s, 10 s, 30 s, 1 min,
5 min, 10 min, 15 min, 30 min, 60 min):
1 Press the <RUN/ENTER> key and hold it down.
2 Press the <RCL> key. Int 2 appears on the display.
3 Set the required interval between the saving procedures with
<V> <W>.
4 Confirm with <RUN/ENTER>.
The measuring instrument automatically switches to the measuring mode.
42
ba75367e04 01/2011
handylab LF 12 Operation
1 free
2 Plug coding
3 Ground
4 Analog output
4
(internal resistance < 5 Ohm)
4.5.2 Recorder (analog output)
You can transmit data to a recorder via the analog output. Connect the analog output to the recorder via the Z 394 interface cable.
The data output automatically switches to Recorder output.
Socket
assignment
2
1
3
RS 232
REC
Note
The analog output is activated automatically in the cable by connecting 2 and
3.
The signal range of the analog output depends on the measured variable and
the measuring range:
Conductivity/
Resistance
Salinity
TDS
Measuring range Voltage Resolution
0.000 ... 1.999 µS/cm 0 ... 1999 mV 1 mV
0.00 ... 19.99 µS/cm 0 ... 1999 mV 1 mV
0.0 ... 199.9 µS/cm 0 ... 1999 mV 1 mV
0 ... 1999 µS/cm 0 ... 1999 mV 1 mV
0.00 ... 19.99 mS/cm 0 ... 1999 mV 1 mV
0.0 ... 199.9 mS/cm 0 ... 1999 mV 1 mV
0 ... 500 mS/cm 0 ... 500 mV 1 mV
Measuring range Voltage Resolution
0 ... 70.0 0 ... 700 mV 1 mV
Measuring range Voltage Resolution
0 ... 1999 mg/l 0 ... 1999 mV 1 mV
ba75367e04 01/2011
43
Operation handylab LF 12
1 CTS
2 RxD
3 Ground
4TxD
4
4.5.3 PC/external printer (RS232 interface)
Via the RS 232 interface, you can transmit the data to a PC or an external
printer.
Use the Z 395 (PC) or Z 391 (ext. printer) cable to connect the interface to
the instruments.
The data output automatically switches to the RS232 interface.
Caution
The RS232 interface is not galvanically isolated.
When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result.
Set up the following transmission data on the PC/printer:
Baud rate selectable between: 1200, 2400, 4800, 9600
Handshake RTS/CTS + Xon/Xoff
Parity none
Socket
assignment
Data bits 8
Stop bits 1
2
1
3
RS 232
REC
4.5.4 Remote control
The handheld meter can be remotely controlled from a PC. This requires a
communication kit (communication cable + communication program) which is
available upon request. The instrument is then controlled via commands that
simulate keystrokes and request the current display contents.
Note
A more detailed description is provided within the scope of delivery of the
communication kit.
44
ba75367e04 01/2011
handylab LF 12 Operation
Day.Month No.
Time
1
2
M
m
%
mg/l
cm
S/
cm
S
mbar
mV/pH
t
n
Store
Auto
LoBat
Tref25
nLF
/
K
%
RCL
Sal
°
AR
TP
C
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
OUpH
AutoCal DIN
AutoCal TEC
Ident
Year
0
0
8
4
Baud
4.6 Configuration
You can adapt the measuring instrument to your individual requirements. To
do this, the following parameters can be changed (the status on delivery is
marked in bold):
Baud rate 1200, 2400, 4800, 9600
Calibration interval (Int 3) 1 ... 180 ... 999 d
AutoRange ARng On or off
Reference temperature – 25 °C (TREF25)
– 20 °C (TREF20)
Baud rate
Display of the measured value
as conductivity or resistivity
Date/time Any
Note
You can leave the configuration menu at any time with <M> . The parameters
that have already been changed are stored.
1 Switch off the measuring instrument.
2 Press the <M> key and hold it down.
3 Press the <ON/OFF> key.
The display test appears briefly on the display. The measuring
instrument then switches automatically to the setting of the
baud rate.
S/cm or MΩ
ba75367e04 01/2011
4 Select the required Baud rate with <V> <W>.
5 Confirm with <RUN/ENTER>. Int 3 appears on the display.
45
Operation handylab LF 12
O
°
C
TP
ARng
mg/l
LoBat
Baud
Day.Month No.
Ident
Year
Sal
%
mbar
S
RCL
AR
Store
Auto
°
F
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
0
8
t
3
n
1
d
Time
Cal
1
SalO
Sal
/
K
%
TP
C
°
°
F
Store
cm
1/
1
S
M
m
%
mg/l
cm
S/
cm
mV/pH
mbar
Baud
4
Day.Month No.
Time
Auto
LoBat
Tref25
nLF
RCL
AR
Cal
Lin
Tref20
TDS
UpH
AutoCal DIN
AutoCal TEC
Ident
Year
S
E
Y
ARng
n
r
A
RCL
AR
ARng
Sal
/
K
%
TP
C
°
°
F
cm
1/
M
cm
mbar
S
E
Y
SalO
Store
1
S
m
%
mg/l
S/
cm
mV/pH
Baud
4
Day.Month No.
Time
Auto
LoBat
nLF
Cal
Lin
Tref20
TDS
UpH
AutoCal DIN
AutoCal TEC
Ident
Year
5
2
t
Tref25
Calibration interval
6 Set the required interval in days with <V> <W>.
7 Confirm with <RUN/ENTER>.
Arn appears on the display.
AutoRange
(automatic
selection of the
measurement
range)
46
Reference
temperature
8 Using <V> <W>, switch between no and YES.
YES: Switch on AutoRange.
no: Switch off AutoRange.
9 Confirm with <RUN/ENTER>.
t25 appears on the display.
10 Using <V> <W>, switch between t25 and t20.
11 Confirm with <RUN/ENTER>. Cond appears on the display.
ba75367e04 01/2011
handylab LF 12 Operation
RCL
AR
Store
Sal
/
K
TP
%
C
°
°
F
cm
1/
nLF
Lin
Tref25
LoBat
Cal
Tref20
Baud
No.
Ident
cm
m
M
mbar
ARng
Auto
AutoCal DIN
AutoCal TEC
1
S
5
2
t
SalO
%
mg/l
mV/pH
Day.Month
Time
TDS
UpH
Year
d
n
o
C
cm
S/
S
1
M
m
%
mg/l
cm
S/
cm
mbar
mV/pH
D
i
s
Store
Auto
Ident
LoBat
Tref25
nLF
/
K
%
Sal
°
AR
TP
C
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
OUpH
AutoCal DIN
AutoCal TEC
Time
Baud
No.
Year
4
0
9
0
Day.Month
Display of the
measured value as
conductivity /
resistivity
12 Using <V> <W>, switch between S/cm and MΩcm.
13 Confirm with <RUN/ENTER>.
The date flashes on the display.
Date and time
ba75367e04 01/2011
14 Set the date of the current day with <V> <W>.
15 Confirm with <RUN/ENTER>.
The date (month) flashes in the display.
16 Set the current month with <V> <W>.
17 Confirm with <RUN/ENTER>.
The year appears on the display.
18 Set the current year with <V> <W>.
19 Confirm with <RUN/ENTER>.
The hours flash on the display.
20 Set the current time with <V> <W>.
21 Confirm with <RUN/ENTER>.
The minutes flash on the display.
22 Set the current time with <V> <W>.
23 Confirm with <RUN/ENTER>.
The measuring instrument automatically switches to the measuring mode.
47
Operation handylab LF 12
4.7 Reset
You can reset (initialize) the measurement parameters and the configuration
parameters separately from one another.
Measurement
parameters
Configuration
parameters
The following measured parameters (
Measuring mode
Cell constant 0.475 cm-1 (calibrated)
Temperature compensation nLF
Reference temperature
Temperature coefficient of the linear temperature compensation
TDS factor 1.00
Note
The calibration data gets lost when the measuring parameters are reset.
Recalibrate after performing a reset.
The following configuration parameters (InI) are reset to the delivery status:
Baud rate 4800
ϰ InI) are reset to the default condition:
ϰ
0.475 cm
2.000 %/K
-1
(set up)
Interval 1
(automatic save) OFF
Interval 2
(for data transmission) OFF
48
ba75367e04 01/2011
handylab LF 12 Operation
ARng
Y
SalO
Sal
/
K
%
TP
C
°
°
F
Store
cm
1/
1
S
M
m
%
mg/l
cm
S/
cm
mV/pH
mbar
Baud
4
Day.Month No.
Time
Auto
LoBat
Tref25
nLF
RCL
AR
Cal
Lin
Tref20
TDS
UpH
AutoCal DIN
AutoCal TEC
Ident
Year
o
n
I
n
I
OUpH
ARng
Y
Sal
Sal
/
K
%
TP
C
°
°
F
Store
cm
1/
1
S
M
m
%
mg/l
cm
S/
cm
mV/pH
mbar
Baud
4
Day.Month No.
Time
Auto
LoBat
Tref25
nLF
RCL
AR
Cal
Lin
Tref20
TDS
AutoCal DIN
AutoCal TEC
Ident
Year
o
n
I
n
I
Resetting the
measuring
paramters
1 Press the <RUN/ENTER> key and hold it down.
2 Press the <CAL> key.
3 Using <V> <W>, switch between no and YES.
YES: Resetting the measuring parameters
no: Retaining settings.
4 Confirm with <RUN/ENTER>.
The measuring instrument switches to the configuration parameters.
Resetting the
configuration
parameters
5 Using <V> <W>, switch between no and YES.
YES: Resetting the configuration parameters
no: Retaining settings.
6 Confirm with <RUN/ENTER>.
The measuring instrument automatically switches to the measuring mode.
ba75367e04 01/2011
49
Operation handylab LF 12
50
ba75367e04 01/2011
handylab LF 12 Maintenance, cleaning, disposal
1
2
5 Maintenance, cleaning, disposal
5.1 Maintenance
The measuring instrument is almost maintenance-free.
The only maintenance task is replacing the batteries.
LoBat indicates that the batteries should be changed. The batteries are then
largely depleted.
Replacing the
batteries
1 Open the housing after the instrument has been switched off:
– Undo the four screws on the underside of the instrument
– Pull down the lower cover (1).
ba75367e04 01/2011
2 If necessary, take the four depleted batteries (2) out of the bat-
tery compartment.
3 Place four new batteries (type Mignon AA) in the battery com-
partment.
4 Close the lower cover (1).
Caution
Make sure that the poles of the batteries are the right way round.
The
± signs on the batteries must correspond to the ± signs in the battery
compartment.
Only use leakproof alkaline manganese batteries.
51
Maintenance, cleaning, disposal handylab LF 12
Note
For the maintenance of the measuring cells, follow the corresponding operating manual.
5.2 Cleaning
Occasionally wipe the outside of the measuring instrument with a damp, lintfree cloth. Disinfect the housing with isopropanol as required.
Caution
The housing is made of a synthetic material (ABS). Thus, avoid contact with
acetone and similar detergents that contain solvents. Remove any splashes
immediately.
5.3 Disposal
Packing This measuring instrument is sent out in a protective transport packing.
We recommend: Keep the packing material. The original packing protects the
instrument against damage during transport.
Batteries This note refers to the battery regulation that applies in the Federal Republic
of Germany. We would ask end-consumers in other countries to follow their
local statutory provisions.
Note
This instrument contains batteries. Batteries that have been removed must
only be disposed of at the recycling facility set up for this purpose or via the
retail outlet.
It is illegal to dispose of them in household refuse.
Measuring
instrument
Dispose of the measuring instrument as electronic waste at an appropriate
collection point. It is illegal to dispose of the instrument in household refuse.
52
ba75367e04 01/2011
handylab LF 12 What to do if...
6 What to do if...
LoBat display
Instrument does
not react to key-
stroke
Cause Remedy
– Batteries almost empty – Replace batteries
(see section 5.1 M
Cause Remedy
– Operating condition
undefined or EMC load
unallowed
– Processor reset:
Press the <CAL> and
<ON/OFF> keys at the same
time and release them again.
The software version is
displayed.
AINTENANCE)
Error message OFL
Error message E3
Display to
Cause Remedy
The measured value lies outside
the measuring range
– Measuring cell not connected – Connect measuring cell
– Cable broken – Replace measuring cell
Cause Remedy
– Measuring cell contaminated – Clean cell and
replace it if necessary
– Unsuitable calibration
– Check calibration solutions
solution
Cause Remedy
– Time-out of the interface – Check the instrument that is
connected
Probe symbol
flashes
ba75367e04 01/2011
Cause Remedy
– Calibration interval expired – Recalibrate the measuring
system
53
What to do if... handylab LF 12
Message StoFull
Cause Remedy
– All memory locations are full – Output data storage and clear
data storage
54
ba75367e04 01/2011
handylab LF 12 Lists
7Lists
This chapter provides additional information and orientation aids.
Abbreviations The list of abbreviations explains the indicators and the abbreviations that ap-
pear on the display and in the manual.
Specialist terms The glossary briefly explains the meaning of the specialist terms. However,
terms that should already be familiar to the target group are not described
here.
Index The index will help you to find the topics that you are looking for.
ba75367e04 01/2011
55
Lists handylab LF 12
Abbreviations
Conductivity value (international γ)
AR AutoRead (drift control)
ARng Automatic range switching
Measuring instrument measures with highest resolution
-1
C Cell constant [cm
] (internat. k)
°C Temperature unit, degrees Celsius
Cal Calibration
InI Initialization
Resets individual basic functions to the status they
had on delivery
Lin Linear temperature compensation
LoBat Batteries almost empty(Low Battery)
nLF Nonlinear temperature compensation
OFL Display range exceeded (Overflow)
SELV Safety Extra Low Voltage
TC Temperature coefficient (internat. α)
TDS Total Dissolved Solids
TP Temperature measurement active (Temperature
Probe)
20/T20 Reference temperature of 20 °C
T
Ref
25/T25 Reference temperature of 25 °C
T
Ref
56
ba75367e04 01/2011
handylab LF 12 Lists
Glossary
Adjusting To manipulate a measuring system so that the relevant value (e. g. the
displayed value) differs as little as possible from the correct value or
a value that is regarded as correct, or that the difference remains within the tolerance.
AutoRange Name of the automatic selection of the measuring range.
AutoRead Name for a function to check the stability of the measured value.
Calibration Comparing the value from a measuring system (e. g. the displayed
value) to the correct value or a value that is regarded as correct. Often, this expression is also used when the measuring system is adjusted at the same time (see adjusting).
Cell constant, k Characteristic quantity of a conductivity measuring cell, depending on
the geometry.
Conductivity Short form of the expression, specific electrical conductivity. It is a
measured value of the ability of a substance to conduct an electric current. In water analysis, the electrical conductivity is a dimension for the
ionized substances in a solution.
Conductometry Name of the conductivity measuring technique.
Measured parameter The measured parameter is the physical dimension determined by
measuring, e. g. pH, conductivity or D. O. concentration.
Measured value The measured value is the special value of a measured parameter to
be determined. It is given as a combination of the numerical value and
unit (e. g. 3 m; 0.5 s; 5.2 A; 373.15 K).
Measuring system The measuring system comprises all the devices used for measuring,
e. g. measuring instrument and probe. In addition, there is the cable
and possibly an amplifier, terminal strip and armature.
Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g sol-
vent.
Reference
temperature
Fixed temperature value to compare temperature-dependent measured values. For conductivity measurements, the measured value is
converted to a conductivity value at a reference temperature of 20 °C
or 25 °C.
Reset Restoring the original condition of all settings of a measuring system.
Resistance Short name for the specific electrolytic resistance. It corresponds to
the reciprocal value of the electrical conductivity.
Resolution Smallest difference between two measured values that can be dis-
ba75367e04 01/2011
played by a measuring instrument.
Slope The slope of a linear calibration function.
57
Lists handylab LF 12
Standard solution The standard solution is a solution where the measured value is
known by definition. It is used to calibrate a measuring system.
TDS Total dissolved solids
TDS factor In conductometric measurements, the measuring instrument calcu-
lates the total dissolved solids (TDS) from the electric conductivity of
the test sample. For the calculation, a simple multiplication factor between 0.4 and 1.0 suffices. The exact factor depends on the quality of
the water to be examined and has to be determined for each water
type.
Temperature
Value of the slope of a linear temperature function.
coefficient
Temperature
compensation
Name of a function that considers the temperature influence on the
measurement and converts it accordingly. Depending on the measured parameter to be determined, the temperature compensation
functions in different ways. For conductometric measurements, the
measured value is converted to a defined reference temperature. For
potentiometric measurements, the slope value is adjusted to the temperature of the test sample but the measured value is not converted.
Temperature function Name of a mathematical function expressing the temperature behav-
ior of a test sample, a probe or part of a probe.
Test sample Designation of the sample ready to be measured. Normally, a test
sample is made by processing the original sample. The test sample
and original sample are identical if the test sample was not processed.
58
ba75367e04 01/2011
handylab LF 12 Index
Index
A
Analog output 43
Authorized use 13
AutoRead 21
C
Calibration 22
Calibration evaluation 22
Calibration protocol 22
Cell constant 22
determine 23
set manually 25
Conductivity 19
Conductivity/ Resistance 43
Connecting a printer 44
Connecting the plug-in power
supply
16
D
Data record 32
Data transmission (interval)
42
Default condition 48
Display 7
Drift control 21
E
Energy saving feature 17
Error messages 53
I
Initial commissioning 15
Initialization 48
Interval
data transmission
save 34
41
K
Keys 6
L
Linear
temperature compensati-
on
30
LoBat 53
N
Nonlinear
temperature compensati-
on
29
O
Operating safety 14
P
Printing
calibration protocol
22
R
Reference temperature
(conductivity)
Remote control 44
Replacing the batteries 51
Reset 48
RS232 interface 44
18
S
Safety 13
Safety precautions 13
Salinity 20, 43
Save interval 34
Scope of delivery 15
Setting the baud rate 45
Setting the date 15, 47
Setting the time 15, 47
T
TDS 20, 43
TDS factor 20
Temperature compensation
28, 31
Temperature compensation
(conductivity)
Temperature sensor
Conductivity
Total dissolved solids 20
18
18
ba75367e04 01/2011
59
Index handylab LF 12
60
ba75367e04 01/2011
SI Analytics GmbH
Postfach 2443
D-55014 Mainz
Hattenbergstr. 10
D-55122 Mainz
Telefon +49 (0) 61 31/66 5111
Telefax +49 (0) 61 31/66 5001
Email: support@
si-analytics.com
Internet: www.si-analytics.com
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