Lab 960 - SI Analytics
OPERATING MANUAL
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nLF
25
0
0
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µ S/
cm
La
TP
b9
60
Lab 960
LABORATORY CONDUCTIVITY METER WITH AUTOMATIC SENSOR RECOGNITION
Lab 960
Copyright
2
© 2009, SI Analytics GmbH
Reprinting - even as excerpts - is only allowed with the explicit written
authorization of SI Analytics GmbH, Mainz.
Printed in Germany.
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Lab 960
KONFORMITÄTSERKLÄRUNG
DECLARATION OF CONFORMITY
DÉCLARATION DE CONFORMITÉ
Wir erklären in alleiniger
Verantwortung, dass das
Produkt
We declare under our sole
responsibility that the
product
Nous déclarons sous notre
seule responsabilité que le
produit
Konduktometer
Lab 960
Conductivity meter
Lab 960
Conductimètre
Lab 960
auf das sich diese Erklärung
bezieht, übereinstimmt mit
den Angaben im Kapitel
to which this declaration
relates is in conformity with
the specifications in the
chapter
auquel se réfère cette
déclaration est conforme aux
indications du chapitre
Technische Daten
Konduktometer Lab 960
30. Oktober 2009
SI Analytics GmbH
Hattenbergstr. 10
D-55122 Mainz
Deutschland, Germany, Allemagne
30. Oktober, October 30, 30 octobre 2009
AGQSF 0000-A103-01/091030
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Lab 960
Contents
Lab 960 - Contents
1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1
1.2
1.3
1.4
2
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1
2.2
3
4.3
4.4
4.5
4.6
4.7
4.8
04/2013
Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1
4.2
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Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 14
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1
3.2
4
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Automatic sensor recognition . . . . . . . . . . . . . . . . . . . . . 11
Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 19
General operating principles . . . . . . . . . . . . . . . . . . . . . . 20
4.2.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3.1 Measuring the conductivity. . . . . . . . . . . . . . . . . 22
4.3.2 Measuring the resistivity. . . . . . . . . . . . . . . . . . . 22
4.3.3 Measuring the salinity . . . . . . . . . . . . . . . . . . . . 23
4.3.4 Measuring the total dissolved solids (TDS) . . . . 24
4.3.5 Measuring with stability control . . . . . . . . . . . . . 25
Determining/setting up the cell constant [C] . . . . . . . . . . 26
4.4.1 Determining the cell constant (calibration) . . . . . 26
4.4.2 Using the last calibrated cell constant . . . . . . . . 29
4.4.3 Setting the cell constant manually . . . . . . . . . . . 30
Setting the temperature compensation TC . . . . . . . . . . . 34
Downloading calibration data . . . . . . . . . . . . . . . . . . . . . 38
Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.7.1 Options for data transmission . . . . . . . . . . . . . . 40
4.7.2 Automatically downloading measurement datasets
at intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.7.3 RS232 interface . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.7.4 USB interface (device) . . . . . . . . . . . . . . . . . . . . 41
4.7.5 Operation with MultiLab pilot . . . . . . . . . . . . . . . 41
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.8.1 System settings . . . . . . . . . . . . . . . . . . . . . . . . . 44
5
Contents
Lab 960
4.9
5
46
48
49
49
50
Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 53
5.1
5.2
5.3
5.4
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Replacing the batteries . . . . . . . . . . . . . . . . . . . .
Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
53
53
54
54
54
6
What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.1
7.2
8
6
4.8.2 Measurement settings . . . . . . . . . . . . . . . . . . . .
4.8.3 Interval for automatic data transmission . . . . . . .
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.1 Resetting the cell constant . . . . . . . . . . . . . . . . .
4.9.2 Resetting meter settings . . . . . . . . . . . . . . . . . . .
General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 59
Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
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Lab 960
Overview
1
Overview
The Lab 960 compact precision conductivity meter enables you to
perform conductivity measurements quickly and reliably. The Lab 960
provides the maximum degree of operating comfort, reliability and
measuring certainty for all applications.
The proven procedures for determining or adjusting the cell constant
support your work with the conductivity meter.
53
nLF
25
0
0
°C
µ S/c
m
TP
La
b9
60
3
2
1
1
Keypad
2
Display
3
Socket field
Note
The meter is also available as part of an individual Set of equipment.
You will find information on this and other accessories in the SI
Analytics GmbH laboratory catalog or via the Internet.
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Overview
Lab 960
1.1
Keypad
MODE
CAL
STO
RCL
SC
In this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <OK>) generally indicates a short keystroke
(under 2 sec) in this operating manual. A long keystroke (approx.
2 sec) is indicated by the underscore behind the key symbol (e.g.
<OK >).
_
<On/Off>:
<On/Off >:
Switch the meter on/off
Resetting the determined cell constant
<MODE>:
<MODE >:
Select measured parameter
Open setting menu for calibration and
measurement
<CAL>:
<CAL >:
Call up calibration procedure
Call up calibration data
<SC>:
<SC >:
_
Activate / deactivate stability control
Set the interval for data transmission
<STO>:
<STO >:
Store measured value
Set the interval for automatic storing
processes
<RCL>:
Display / transmit measured values
and calibration records
Erase stored measured values
_
MODE
CAL
SC
STO
_
_
_
RCL
<RCL
8
_>:
<>:
Increment values, scroll
<>:
Decrement values, scroll
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Overview
<OK>:
<OK >:
_
1.2
Confirm entries
Open setting menu for system settings
Display
Measured variable
Measured value
display
Temperature
display, function
display indicators,
status display
indicators
Temperature display,
function display
indicators, status
display indicators
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[AR]
Stability control is active
[ARng]
Automatic range switch-over: meter measures with
highest possible resolution
[Auto][Store]
Automatic storing is switched on
[Cal]
Calibration
[Lin]
Linear temperature compensation
[LoBat]
With battery operation: Batteries almost empty
[nLF]
Nonlinear temperature compensation
[RCL]
Memory display / memory download
[TP]
Temperature measurement active
[Tref20]
Reference temperature 20 °C
[Tref25]
Reference temperature of 25 °C
9
Overview
Lab 960
1.3
Socket field
Connectors:
1
Conductivity measuring cell
2
Temperature sensor
3
4
USB interface
5
Power pack
6
RS 232 interface
CAUTION
Only connect sensors to the meter that cannot return any voltages
or currents that are not allowed (> SELV and > current circuit with
current limiting).
Almost all measuring cells - in particular SI Analytics GmbH
measuring cells - fulfill these conditions.
10
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Lab 960
Safety
2
Safety
This operating manual contains basic instructions that you must follow
during the commissioning, operation and maintenance of the meter.
Consequently, all responsible personnel must read this operating
manual before working with the meter.
The operating manual must always be available within the vicinity of the
instrument.
Target group
Safety instructions
The meter was developed for work in the laboratory.
Thus, 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 in this operating manual are indicated by the
warning symbol (triangle) in the left column. The signal word (e.g.
"Caution") indicates the level of danger:
WARNING
indicates instructions that must be followed precisely in order to
avoid possibly great dangers to personnel.
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.
Further notes
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. operating
manuals.
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Safety
Lab 960
2.1
Authorized use
Authorized use of the meter consists exclusively of the measurement
of conductivity, temperature, salinity and TDS (total dissolved solids) in
a laboratory.
The technical specifications as given in chapter 7 TECHNICAL DATA
(page 57) must be observed. Only the operation and running of the
meter according to the instructions given in this operating manual is
authorized.
Any other use is considered unauthorized.
2.2
General safety instructions
This instrument is constructed and tested in compliance with the IEC
1010 safety regulations for electronic measuring instruments.
It left the factory in a safe and secure technical condition.
Function and
operational safety
The smooth functioning and operational safety of the meter 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 meter can only be
guaranteed under the environmental conditions that are specified in
chapter 7 TECHNICAL DATA (page 57).
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.
CAUTION
The meter is only allowed to be opened by personnel authorized
by SI Analytics GmbH.
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Lab 960
Safety
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 meter:
 has been damaged in transport
 has been stored under adverse conditions for a lengthy period of
time
 is visibly damaged
 no longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the meter.
Obligations of the
purchaser
The purchaser of this meter must ensure that the following laws and
guidelines are observed when using dangerous substances:
 EEC directives for protective labor legislation
 National protective labor legislation
 Safety regulations
 Safety datasheets of the chemical manufacturers.
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Safety
16
Lab 960
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Lab 960
Commissioning
3
Commissioning
3.1
Scope of delivery
 Lab 960 laboratory meter
 Power pack
 4 batteries 1.5 V Mignon type AA
 Z875 USB cable with A plug on B plug
 Transparent cover
 Operating manual
 CD-ROM with USB driver
3.2
Initial commissioning
Perform the following activities:
 Insert batteries
 Switch on the meter
 Set the date and time
 Connect the power pack (for line power operation only).
Insert batteries
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1
Open the battery compartment (1) on the underside of the
meter.
2
Place four batteries (type Mignon AA) in the battery
compartment.
3
Close the battery compartment (1).
The date (day) flashes in the display.
4
Set the date and time according to page 39.
17
Commissioning
Lab 960
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.
Switching on the meter
Setting the date and
time
Connecting the power
pack
1
Switch on the meter with <On/Off>.
A display test is briefly displayed.
2
See page 44
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 VDC). This saves the batteries.
CAUTION
The line voltage at the operating site must lie within the input
voltage range of the original power pack (see page 57).
CAUTION
Use original power packs only (see page 57).
3
Insert the plug into the socket of the conductivity meter.
4
Connect the original power pack to an easily accessible power
outlet.
Note
You can carry out measurements without the power pack.
18
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Lab 960
Operation
4
Operation
4.1
Switching on the meter
1
Place the meter on a flat surface and protect it from intense
light and heat.
2
Press the <On/Off> key.
A display test is briefly displayed.
Subsequently, the meter switches to the measuring mode
(measured value display).
Note
The meter has an energy saving feature to avoid unnecessary battery
depletion during battery operation.
The energy saving feature switches off the meter if no key was pressed
during the specified interval (setting the switch-off interval see
page 44).
The energy saving feature is not active:
 if the meter is supplied via the power pack or the USB interface
 if the automatic storing function is active (see page 38)
 if a PC is connected (with communication cable to RS232 interface)
 if the printer cable is connected (for external printers).
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Operation
Lab 960
4.2
General operating principles
This section contains basic information of the operation of the Lab 960.
4.2.1
Operating modes
The instrument has the following operating modes:
 Measuring
The display indicates the measurement data in the measured value
display
 Calibration
The display guides you thru a calibration procedure with calibration
information
 Storage in memory
The meter stores measuring data automatically or manually
 Transmitting data
The meter transmits measuring data and calibration records to a
serial interface automatically or manually.
 Configuration
The system menu or a sensor menu with submenus, settings and
functions is displayed
4.2.2
Keys
Functions
Operation
The meter is operated via keys. The keys can have different functions
with long or short keystrokes.
Generally, with a short keystroke a function is carried out. A long
keystroke opens a setting menu.
In a setting menu, settings are selected with the <><> keys.
A setting is confirmed with <OK>. With confirming, the setting is
finished and the next setting is displayed.
Representation
In this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <OK>) generally indicates a short keystroke
(under 2 sec) in this operating manual. A long keystroke (approx.
2 sec) is indicated by the underscore behind the key symbol (e.g.
<OK >).
_
20
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Lab 960
Operation
4.3
Preparatory activities
Measuring
Perform the following preparatory activities when you want to measure:
1
Connect a measuring cell to the meter.
2
Adjust the temperature of the test solutions and measure the
current temperature if the measurement is made without a
temperature sensor.
3
Calibrate or check the meter with the measuring cell.
4
Select the measured parameter with <MODE>.
CAUTION
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as incorrect values would result.
The RS232 and USB interfaces are not galvanically isolated.
Temperature sensor
The temperature measurement is absolutely essential for a
reproducible conductivity measurement. If a temperature sensor is
connected, it is indicated on the display by TP.
If you use a conductivity measuring cell without integrated temperature
sensor, we recommend to use an external temperature sensor.
Note
The conductivity meter automatically recognizes the type of the
temperature sensor used. Therefore, you can connect measuring cells
with an NTC30 or Pt1000.
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Operation
Lab 960
4.3.1
Measuring the conductivity
1
Perform the preparatory activities according to page 21.
2
Immerse the conductivity measuring cell in the test sample.
3
If necessary, scroll with <MODE> until the measured
parameter ϰ with the unit mS/cm or µS/cm is displayed.
4
Wait for a stable measured value.
530
Tref25
µ S/cm
250
°C
TP
nLF
5
4.3.2
22
Measurement with stability control (see page 25).
Measuring the resistivity
1
Perform the preparatory activities according to page 21.
2
Immerse the conductivity measuring cell in the test sample.
3
If necessary, scroll with <MODE> until the measured
parameter ϰ with the unit MOhm is displayed.
4
Wait for a stable measured value.
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Lab 960
Operation
5
4.3.3
Measurement with stability control (see page 25).
Measuring the salinity
1
Perform the preparatory activities according to page 21.
2
Immerse the conductivity measuring cell in the test sample.
3
Using <MODE>, scroll as necessary until the measured
parameter Sal is displayed.
4
Wait for a stable measured value.
Sal
323
212
°C
TP
nLF
5
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Measurement with stability control (see page 25).
23
Operation
Lab 960
4.3.4
Measuring the total dissolved solids (TDS)
1
Perform the preparatory activities according to page 21.
2
Immerse the conductivity measuring cell in the test sample.
3
Using <MODE>, scroll as necessary until the measured
parameter TDS is displayed.
4
Using <><>, set the TDS factor (0.40 ... 1.00).
TDS
353
Tref25
mg/l
100
nLF
5
Wait for a stable measured value.
TDS
313
Tref25
mg/l
087
nLF
6
24
Measurement with stability control (see page 25).
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Lab 960
Operation
4.3.5
Measuring with stability control
The stability control function (SC) checks the stability of the
measurement signal. The stability has a considerable effect on the
reproducibility of the measured value.
1
With <SC>, activate the stability control function.
The AR function display indicator appears.
The current measured value is frozen (hold function).
2
Start measurement with stability control with <OK>.
An AutoRead measurement is carried out to control the stability
of the measured value. The AR display indicator flashes until a
stable value is measured. The calibration process is finished
when AR stops flashing.
This measured value is downloaded to the interface.
3
If necessary, start the next measurement with stability control
with <OK>.
4
Press <MODE> or <SC> to terminate the stability control.
Note
The current measurement with stability control can be terminated at
any time (accepting the current value) by pressing <OK>.
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25
Operation
Lab 960
4.4
Why determine/set up
the cell constant?
Determining/setting up the cell constant [C]
Due to aging, the cell constant slightly changes. As a result, an inexact
measured value is displayed. Calibration determines the current value
of the cell constant and stores this value in the instrument.
Thus, you should calibrate at regular intervals.
The calibration data is stored in the meter.
You can determine the cell constant of the conductivity measuring cell
in the ranges 0.450 ... 0.500 cm-1 , 0.585 ... 0.715 cm-1 or 0.800 ...
1.200 cm-1 by calibrating in the 0.01 mol/l KCl control standard or set it
manually in the range 0.250 ... 2.500 cm-1 or 0.090 ... 0.110 cm-1.
Besides, the fixed cell constant 0.010 cm-1 can be selected.
Cleaning interval (Int.C)
When the specified cleaning interval (Int.C) has expired, the Cln display
indicator appears after the meter has been switched on and reminds
you to clean the measuring cell. It is still possible to measure.
The cleaning interval (Int.C) is set to 180 days (d180) in the factory. You
can change the interval (see page 46).
Note
In order to maintain the high measurement accuracy of the measuring
system, clean the measuring cell and recalibrate after the cleaning
interval has expired.
4.4.1
Determining the cell
constant
(calibration in control
standard)
1
Determining the cell constant (calibration)
Press <CAL> repeatedly until CAL CELL is displayed.
C AL
CEL L
26
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Lab 960
Operation
_> to confirm the selection of CAL
2
Press <OK> or <CAL
CELL.
3
Immerse the measuring cell in the control standard solution,
0.01 mol/l KCI.
4
Start the calibration with <OK>.
The determination of the cell constant with stability control
starts.
The
display indicator flashes until there is a stable signal.
The determined cell constant is displayed for 10 seconds. The
meter stores the cell constant automatically.
After this the meter switches to the measuring mode.
Note
If the error message E3 appears, refer to CHAPTER 6 WHAT TO DO IF...
(PAGE 55).
Stability control
During calibration, the stability control is automatically activated.
Note
This method of automatically determining the cell constant by
calibration in the 0.01 mol/l KCL control standard can only be used for
measuring cells with cell constants in the ranges
0.450 ... 0.500 cm-1, 0.585 ... 0.715 cm-1 or 0.800 ... 1.200 cm-1.
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Operation
Calibration evaluation
Lab 960
After the calibration, the meter automatically evaluates the current
status. The evaluation appears on the display.
Display
Cell constant [cm-1]
Status display indicator CAL.
in the range
0.450 ... 0.500 cm-1
0.585 ... 0.715 cm-1
0.800 ... 1.200 cm-1
You are working with a
correctly calibrated measuring
cell.
E3
Eliminate the error according to
CHAPTER 6 WHAT TO DO IF...
(PAGE 55).
Calibration record
outside the ranges
0.450 ... 0.500 cm-1
0.585 ... 0.715 cm-1
or
0.800 ... 1.200 cm-1
When finishing a calibration, the new calibration values are stored. )
Note
The calibration record is automatically transmitted to the interface after
calibrating.
Sample record:
16.09.2005 08:53:54
Lab 960 02320025
CALIBRATION COND
Cal Time
:
16.09.2005 08:22:14
Cal Interval: 180d
Cal Std.:
0.01 mol/l KCL
40.0 °C
Conduct./Tref25: 1413µS/cm
Cell Const : 0.975
1/cm
Probe :
+++
Downloading calibration
data
You can download the calibration data:
 to the display (see page 41)
 to the interface (see page 40)
28
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Lab 960
Operation
4.4.2
1
Using the last calibrated cell constant
Press <CAL> repeatedly until CELL is displayed.
CEL L
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_> to confirm the selection of CELL.
2
Press <OK> or <CAL
3
If necessary, press <CAL> repeatedly until CAL and the last
calibrated cell constant is displayed.
4
Confirm the selection with <OK> .
The displayed cell constant is used.
The meter switches to the measured value display.
29
Operation
Lab 960
4.4.3
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.
Range
0.250 ... 2.500 cm-1
1
Press <CAL> repeatedly until CELL is displayed.
CEL L
30
_
2
Confirm the selection with <OK> or <CAL > .
The cell constant that was set last is displayed.
3
Press <CAL> repeatedly until a cell constant in the range 0.250
... 2.500 cm-1 is displayed.
4
Set the cell constant to be used with <><>, e.g.
0.614 cm-1.
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Operation
680
Tref25
nLF
Range
0.090 ... 0.110 cm-1
µ S/cm
1/cm
06 1 4
ARng
5
Confirm the selection with <OK> .
The new cell constant is used from now on.
The meter switches to the measured value display.
1
Press the <CAL> key repeatedly until CELL is displayed.
CEL L
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_> .
2
Confirm the selection with <OK> or <CAL
3
Press <CAL> repeatedly until a cell constant in the range 0.090
... 0.110 cm-1 is displayed.
31
Operation
Lab 960
218
Tref25
1/cm
010 0
ARng
nLF
4
µ S/cm
Set the cell constant to be used with <><>, e.g.
0.105 cm-1.
271
Tref25
nLF
Selecting the cell
constant
0.010 cm-1
µ S/cm
1/cm
010 5
ARng
5
Confirm the selection with <OK> .
The new cell constant is used from now on.
The meter switches to the measured value display.
1
Press the <CAL> key repeatedly until CELL is displayed.
CEL L
32
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Lab 960
Operation
Confirm the selection with <OK> or <CAL
3
Press <CAL> repeatedly until the cell constant 0.010 cm-1 is
displayed.
925
Tref25
nLF
4
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_> .
2
µ S/cm
1/cm
001 0
ARng
Confirm the selection with <OK> .
The meter switches to the measured value display.
33
Operation
Lab 960
4.5
Setting the temperature compensation TC
The calculation of the temperature compensation is based on the
preset reference temperature, Tref 20 or Tref 25 (see page 43).
You can select one of the following temperature compensations:
 Nonlinear temperature compensation "nLF"
according to DIN 38404 or EN 27 888
 Linear temperature compensation "Lin"
with adjustable coefficient in the range 0.001 ... 3.000 %/K
 No temperature compensation
Note
Select the following temperature compensations given in the table
according to the respective test sample:
Application tips
34
Test sample
Temperature compensation TC
Natural water
(ground water,
surface water,
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 according to
IOT
Display
indicator
Sal,
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Operation
Selecting the nonlinear
temperature
compensation
1
Press <CAL> repeatedly until tc is displayed.
Tc
_
2
Confirm the selection with <OK> or <CAL > .
The temperature compensation that was set last is displayed.
3
Press <CAL> repeatedly until nLF is displayed.
684
Tref25
nLF
4
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µ S/cm
NL F
ARng
Confirm the selection with <OK> .
The nonlinear temperature compensation is switched on.
The meter switches to the measured value display.
The selected temperature compensation appears as the status
display.
35
Operation
Selecting the linear
temperature
compensation
Lab 960
1
Press <CAL> repeatedly until tc is displayed.
Tc
_
2
Confirm the selection with <OK> or <CAL > .
The temperature compensation that was set last is displayed.
3
Press <CAL> repeatedly until the adjustable linear
temperature coefficient appears on the display.
1224
Tref25
200 0
Lin
4
36
µ S/cm
% /K
ARng
Set the temperature coefficient with <><>, e. g. 1.880 %/K.
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Operation
Switching off the
temperature
compensation
5
Confirm the selection with <OK> .
The linear temperature compensation is switched on.
The meter switches to the measured value display.
The selected temperature compensation appears as the status
display.
1
Press <CAL> repeatedly until tc is displayed.
Tc
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_> .
2
Confirm the selection with <OK> or <CAL
3
Press <CAL> repeatedly until the following display appears.
4
Confirm the selection with <OK> .
The temperature compensation is switched off.
The meter switches to the measured value display.
37
Operation
Lab 960
4.6
Memory
The conductivity meter has an internal data memory. It can store up to
800 datasets.
A complete dataset consists of:
 Date/time
 Memory location number
 ID number
 Measured value
 Temperature
 Temperature measuring procedure (manual or automatic)
You can transmit measured values (datasets) to the data memory in
two ways:
 Store manually (<STO>)
 Store automatically (<STO
4.6.1
38
_>).
Manual storage
1
Store the measurement dataset with <STO>.
The consecutive number of the next free memory location is
shown on the display.
2
Confirm with <OK>.
The display switches to entering the ID number.
The ID number that was set last is displayed.
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Operation
Message Sto
Full
3
Using <><>, enter the required ID number (1 ... 9999).
4
Confirm with <OK>.
The dataset is stored.
The meter switches to the measuring mode.
This message appears when all of the 800 memory locations are
occupied.
When the memory is full, you can:
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
press <OK>
to store the current measured value.
The oldest measured value (memory
location 1) will be overwritten by this

press <MODE>
to switch to the measured value display without
storing

download the data memory (see page 40)

clear the memory (see page 41).
39
Operation
Lab 960
4.6.2
Automatic storage at intervals
In order to store measured values automatically at certain time
intervals, set the storage interval (Int.1).
Setting the save interval
The default setting for the storage 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):
Note
When the AutoStore function is active, the automatic switchoff function
is off.
_>, call up the setting menu for automatic storing
1
Using <STO
(Int.1) .
2
Set the required interval with <><>.
3
Confirm with <OK>.
FrEE, the number of free memory locations is displayed.
199
FrEE
40
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Operation
Note
If there are not enough memory locations available for your
measurements:
 Output and backup the data storage (see page 40) and
 clear the memory (see page 41).
Switching off the
automatic storing
function
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4
Confirm with <OK>.
Ident and the ID number that was last set is displayed.
5
Set the required ID number with <><>.
6
Confirm with <OK>.
The meter switches to the measured value display and starts
the measuring and storing procedure.
AutoStore flashes on the display.
7
As soon as all of the 800 memory locations are occupied,
AutoStore is terminated (Int.1 = OFF).
You can terminate the automatic storing function in the following ways:
 set the storage interval (Int.1) to OFF, or
 switch the meter off and then on again.
41
Operation
Lab 960
4.6.3
Downloading the data storage
You can download stored measurement datasets:
 to the display
 to the interface (see page 43)
Download to the display
1
Open the storage menu with <RCL>.
2
If necessary, scroll with <RCL> until Sto disp (measurement
datasets) is displayed.
3
Press <OK> to display the dataset that was last stored.
The memory location of the dataset is displayed for approx. 2
s, then the respective temperature appears.
While the memory is displayed you can:

press
<OK>
to display further data of the dataset (ID number,
date, time, memory location, temperature)

use <>
to display the next dataset

use <>
to display the previous dataset
Note
In order to search for certain data of the dataset, e.g. for the date,
proceed as follows:
42
1
Use <OK> to scroll on until the required data of the dataset, e.
g. the date, is displayed.
2
Use <> or <> to scroll until the required date is displayed.
After approx. 2 s the display shows the respective temperature
value.
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Operation
4.6.4
Erasing the data memory
You can erase all stored measurement datasets.
1
Open the storage menu with <RCL>.
2
If necessary, scroll with <RCL> until Sto disp or Sto prt is
displayed.
3
Press <RCL
4
Press <OK> to erase the entire contents of the memory.
or
Return to the measured value display with <MODE>.
The stored data is retained.
4.6.5
_> to display the Clr All function.
Downloading calibration data
You can download calibration data:
 to the display
– via the memory menu
– via the calibration menu
 to the interface (see page 40)
Download to display via
memory menu
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1
Open the storage menu with <RCL>.
2
If necessary, scroll with <RCL> until CAL diSP is displayed.
3
Press <OK> to display the calibration data.
The calibration date and calibrated cell constant are displayed
consecutively for approx. 10 seconds each.
43
Operation
Lab 960
While the calibration data is being displayed you can:

press <OK>

press <CAL
Download to display via
calibration menu
1
to display further calibration data
(calibrated cell constant)
_>
to download the calibration data to the
interface
_
Press <CAL > to display the calibration data.
The calibration date and calibrated cell constant are displayed
consecutively for approx. 10 seconds each.
While the calibration data is being displayed you can:

press <OK>

press <CAL
4.7
_>
to display further calibration data
(calibrated cell constant)
to download the calibration data to the
interface
Transmitting data
The meter has two interfaces:
 RS232 interface (serial port)
 USB interface (device)
Via both interfaces, you can transmit data to a PC and update the meter
software.
The meter is supplied with power via the USB interface.
The RS232 interface enables to transmit data to an external printer.
Note
The relevant interface cable has to be connected if you want to
download data to an interface (USB or RS232).
It is not possible to download data to both interfaces (USB and RS232)
at the same time. After connecting a meter to the USB socket the
RS232 interface is inactive. The RS232 interface is active if no meter is
connected to the USB interface.
CAUTION
The interfaces are not galvanically separated.
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as incorrect values would result.
44
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Operation
4.7.1
Options for data transmission
Via the USB interface you can transmit data to a PC. Via the RS 232
interface, you can transmit data to a PC or an external printer.
The following table shows which data are transmitted to the interface in
which way:
Data
Control
Operation / description
Current measured
values
manual
 With <OK>.
 Simultaneously with every
automatic storage process
(Int.1) (see page 38).
automatic, at
intervals
_
 With <SC >. Then you
can set the transmission
interval (Int.2) (see
page 40).
 Simultaneously with every
automatic storage process
(Int.1) (see page 38).
automatic
 After each measurement
with stability control.
Stored measured
values
manual
 All datasets
(see page 44)
calibration records
manual
 Without display indication
(see page 44).
 During the display
indication with <CAL
(see page 41).
automatic
4.7.2
_>
 On completion of a
calibration procedure.
Automatically downloading measurement datasets at
intervals
In order to automatically download to the interface measured values at
certain time intervals, set the download interval (Int.2).
Setting the download
interval
The default setting for the download interval (Int.2) is 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
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_> to open the setting of the Int.2 interval.
Press <SC
45
Operation
Lab 960
2
If necessary, set an interval with <><>.
3
Close the setting with <OK>.
The download to the interface takes place at the specified
interval.
4.7.3
Downloading stored measurement datasets
1
Open the storage menu with <RCL>.
2
If necessary, scroll with <RCL> until Sto Prt is displayed.
3
Press <OK> to download the calibration data to the interface.
4.7.4
Downloading calibration data
1
Open the storage menu with <RCL>.
2
If necessary, scroll with <RCL> until CAL Prt is displayed.
3
Press <OK> to download the calibration data to the interface.
4.7.5
RS232 interface
1
Connect the interface to the PC or printer via the cable Z390
(PC) or Z393 (ext. printer).
2
If necessary, disconnect a connected USB cable from the
meter.
3
Set up the following transmission data on the PC/printer:
– Baud rate: selectable from 1200, 2400, 4800, 9600,
– Handshake: RTS/CTS + Xon/Xoff
PC only:
– Parity: none
– Data bits: 8
– Stop bits: 1
46
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Lab 960
Operation
Socket assignment
(RS232)
3
4
2
6
5
1
RS 232
4.7.6
11
2 RxD
3 TxD
41
5 SGnd
6 CTS
1
not used
USB interface (device)
Connect the interface to the PC via the supplied Z875 USB cable. The
data output automatically switches to USB. The RS232 interface is
deactivated.
Installation of the USB
driver on the PC
System requirements of the PC for installation of the USB driver:
 PC with Pentium processor or higher with at least one free USB
connection and CD-ROM drive
 Windows 2000, XP, Vista.
1
Insert the supplied installation CD in the CD drive of your PC.
2
Install the USB driver on the PC.
Follow the Windows installation instructions as necessary.
3
The meter is listed as a virtual COM interface among the
connections in the Windows instrument manager.
4.7.7
Operation with MultiLab pilot
With the aid of the MultiLab pilot software, you can record and evaluate
measuring data with a PC. The data is transmitted after the meter is
connected to the RS232 serial interface or USB interface of a PC.
Note
More detailed information can be found in the MultiLab pilot software
operating manual.
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47
Operation
Lab 960
4.8
Settings
You can adapt the meter to your individual requirements. The settings
are done in the following menus:
 System settings (<OK
_>)
– Baud rate (Baud)
– Switch-off interval (tOff)
– Date (Day.Month)
– Date (Year)
– Time (Time)
 Calibration and measurement settings (<MODE
_>)
– Reference temperature (Tref25 or Tref20)
– Temperature unit (°C / °F)
– Cleaning interval (Int.C [0 ... 999])
 Setting and starting automatic storing processes
(<STO >, see page 38)
_
– AutoStore interval (Int.1)
 Setting and starting the data download to the interface
(<SC >, see page 43)
_
– Data download interval (Int.2)
Note
You can exit the setting menu at any time by pressing <MODE>.
Settings already modified and confirmed with <OK> are stored.
48
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Operation
4.8.1
System settings
The default setting is printed in bold.
Baud rate (Baud)
1200, 2400, 4800, 9600
Switch-off interval (.OFF)
10, 20, 30, 40, 50 min,
1, 2, 3, 4, 5, 10, 15, 20, 24 h
Date (Day.Month)
Any
Date (Year)
Any
Time (Time)
Any
1
Open the menu for system settings with <OK
The first system setting is displayed.
_>.
Baud rate (Baud)
Baud
480 0
2
Set the required baud rate with <><> .
3
Confirm with <OK>.
.OFF, the setting of the switch-off interval is displayed.
Switch-off interval
(.OFF)
Time
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t Of f
010 0
49
Operation
Lab 960
4
Set the switch-off interval with <><>.
5
Confirm with <OK>.
Day.Month, the setting of the date is displayed.
The day display flashes.
Date and time
Day.Month
50
300 3
6
Set the date of the current day with <><> .
7
Confirm with <OK>.
The month display flashes.
8
Set the current month with <><> .
9
Confirm with <OK>.
Year, the setting of the year is displayed.
10
Set the year with <><> .
11
Confirm with <OK>.
The setting of the time is displayed.
The hour display flashes.
12
Set the current hour with <><> .
13
Confirm with <OK>.
The minute display flashes.
14
Set the current minute with <><> .
15
Confirm with <OK>.
The system settings are completed.
The meter switches to the measuring mode.
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Lab 960
Operation
4.8.2
Measurement settings
These settings apply to the determination of the cell constant and
measurement (the default condition is printed in bold).
Reference temperature
Reference temperature
t25, t20
Temperature unit (UnI)
°C, °F
Cleaning interval (Int.C)
0 ... 180 ... 999 d
1
Open the menu for measurement settings with <MODE
t25, the adjusted reference temperature is displayed.
_>.
T 25
Tref25
2
Select the reference temperature with <><> .
3
Confirm with <OK>.
Uni, the setting of the unit of the temperature value is
displayed.
Temperature unit (Uni)
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51
Operation
Lab 960
4
Using <><>, toggle between °C and °F.
5
Confirm with <OK>.
Int.C, the setting of the cleaning interval is displayed.
6
Set the interval with <><>.
7
Confirm with <OK>.
The measurement settings are completed.
The meter switches to the measuring mode.
Cleaning interval (Int.C)
52
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Operation
4.8.3
Interval for automatic storing (AutoStore)
After setting the interval for automatic storing the current measurement
dataset is stored at the specified interval.
AutoStore interval (Int.1)
1
OFF, 5 s, 10 s, 30 s, 1 min,
5 min, 10 min, 15 min, 30 min, 60 min
_
Press <STO > to open the setting for the storage interval.
Int.1, the setting of the storage interval is displayed.
AutoStore
interval
Time
Int 1
100
Auto Store
2
Press <><> to select an interval.
3
Confirm with <OK>.
FrEE, the number of free memory locations is displayed.
199
FrEE
4
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Confirm with <OK>.
The setting of the storage interval is completed.
The meter switches to the measuring mode.
53
Operation
Lab 960
4.8.4
Interval for automatic data transmission
The interval for automatic data transmission serves to transmit the
current measurement dataset to the interface at the specified interval.
Data transmission interval
(Int.2)
1
OFF, 5 s, 10 s, 30 s, 1 min,
5 min, 10 min, 15 min, 30 min, 60 min
_
Press <SC > to open the setting for the transmission interval.
Int.2, the setting of the transmission interval is displayed.
Data transmission
interval
INT 2
50
54
2
Press <><> to select an interval.
3
Confirm with <OK>.
The setting of the interval for the data transmission to the
interface is completed.
The meter switches to the measuring mode.
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Lab 960
Operation
4.9
Reset
4.9.1
Resetting the cell constant
This function serves to erase the last determined cell constant.
Subsequently, the meter uses the last manually adjusted cell constant.
All other meter settings are retained.
Note
The measuring system is possibly not calibrated after a reset. Before
measuring, make sure the meter uses the cell constant suitable for the
measuring cell.
Resetting the cell
constant
1
_
Press <On/Off > to open the menu for the reset of the cell
constant.
Ini.C is displayed.
IniC
no
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2
Press <><> to display no or YES.
YES: Reset the cell constant.
no: Retain the cell constant.
3
Confirm with <OK>.
The menu is finished.
The meter switches to the measuring mode.
55
Operation
Lab 960
4.9.2
Resetting meter settings
This function resets to the default condition meter settings. The
relevant values are given on the following pages:
System settings
page 44
Measurement settings
page 46
The following settings are also reset to the default condition:
Resetting the meter
settings
Setting
Default settings
Measured variable
ϰ mS/cm or µS/cm
Adjusted cell constant
0,650 1/cm
Temperature compensation
nLF
Temperature coefficient of the
linear temperature
compensation
2.000 %/K
TDS factor
1.00
1
Switch on the meter with <On/Off>.
The display test appears briefly on the display.
2
During the display test, press <MODE> to open the menu for
the reset of the meter settings.
Init is displayed.
Init
no
3
56
Press <><> to display no or YES.
YES: Reset the meter settings.
no: Retain the meter settings.
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Lab 960
Operation
4
Confirm with <OK>.
The menu is finished.
The meter switches to the measuring mode.
Note
The measuring system is possibly not calibrated after a reset. Before
measuring, make sure the meter uses the cell constant suitable for the
measuring cell.
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57
Operation
58
Lab 960
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Lab 960
Maintenance, cleaning, disposal
5
Maintenance, cleaning, disposal
5.1
Maintenance
The only maintenance activity required is replacing the batteries.
Note
See the relevant operating manuals of the measuring cells for
instructions on maintenance.
5.1.1
Replacing the batteries
1
Open the battery compartment (1) on the underside of the
meter.
2
Remove the four batteries from the battery compartment.
3
Place four new batteries (type Mignon AA) in the battery
compartment.
4
Close the battery compartment (1).
The date (day) flashes on the display.
5
Set the date and time according to page 44.
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.
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53
Maintenance, cleaning, disposal
Lab 960
5.2
Cleaning
Occasionally wipe the outside of the meter with a damp, lint-free cloth.
Disinfect the housing with isopropanol as required.
CAUTION
The housing is made of synthetic material (ABS). Thus, avoid
contact with acetone or similar detergents that contain solvents.
Remove any splashes immediately.
5.3
Packing
This meter is sent out in a protective transport packing.
We recommend: Keep the packing material. The original packing
protects the instrument against damage during transport.
5.4
Batteries
Disposal
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 as household refuse.
54
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Lab 960
What to do if...
6
Error message
E1
Cause
Error message,
E3
Cause
Display of Cln
What to do if...
– Measured value outside the
measuring range
Remedy
– Clean cell and replace it if
necessary
– Unsuitable calibration
solution
– Check calibration solutions
Cause
Display,
LoBat
Cause
Display
to
Cause
Instrument does not
react to keystroke
Cause
04/2013
– Use suitable measuring cell
– Measuring cell contaminated
– Cleaning interval expired
ba75557e06
Remedy
– Batteries almost empty
– Time-out of the interface
– Operating condition undefined
or EMC load unallowed
Remedy
– Recalibrate the measuring
system
Remedy
– Replace the batteries (see
page 53)
Remedy
– Check the instrument that is
connected
Remedy
– Processor reset:
Press and hold the <SC>
key and switch the meter on
55
What to do if...
Lab 960
You want to know which
software
version is in the
instrument
Cause
Message StoFull
Cause
– E. g., a question by the service
department
– All 800 memory locations are
full
56
Remedy
– Switch on the meter.
During the display test,
display the software version
with <OK>.
Remedy
–
Download and clear data
memory
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Lab 960
Technical data
Translation of the legally binding German version
Dimensions
Weight
Mechanical structure
Stand October 30, 2009
7
Technical data
7.1
General data
approx. 240 x 190 x 80 mm
approx. 1.0 kg (without power pack, without stand)
Type of protection
IP 43
Electrical safety
Protective class
III
Test certificates
cETLus
Ambient
conditions
Storage
- 25 °C ... + 65 °C
Operation
0 °C ... + 55 °C
Climatic class
2
Batteries
4 x 1.5 V alkali-manganese batteries, Type
AA
Operational life
Approx. 1000 operating hours
Power pack
(charging device)
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.
Baud rate
adjustable:
1200, 2400, 4800, 9600 Baud
Type
RS232, bidirectional
Data bits
8
Stop bits
2
Parity
None
Handshake
RTS/CTS+Xon/Xoff
Power
supply
Serial
interface
USB interface
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Automatic switch-over when a USB cable is connected.
Type
USB 1.1 (device)
Cable length
max. 3 m
57
Technical data
Lab 960
Translation of the legally binding German version
Guidelines
and norms used
Stand October 30, 2009
EMC
EC guideline 2004/108/EC
EN 61326-1 Class B
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
IP protection class
EN 60529
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.
Any changes or modifications not expressly approved by the
party responsible for compliance could void the user's authority
to operate the equipment.
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Lab 960
Technical data
Translation of the legally binding German version
7.2
Measuring ranges,
resolution
Stand October 30, 2009
Measuring ranges, resolution, accuracy
Variable
Measuring range
Resolution
0.000 ... 1.999*
0.00 ... 19.99**
0.0 ... 199.9
0 ... 1999
0.001
0.01
0.1
1
0.00 ... 19.99
0.0 ... 199.9
0 ... 500
0.01
0.1
1
Resistivity
[MOhm*cm]
0.00 ... 19.99
0.0 ... 199.9
0 ... 1999
0.01
0.1
1
SAL
0.0 ... 70.0
according to the IOT
table
0.1
TDS [mg/l]
0 ... 1999
Factor can be set
between 0.40 and
1.00
1
T [°C]
− 5.0 ... + 120.0
0.1
T [°F]
+ 23.0 ... + 248.0
0.1
ϰ [µS/cm]
ϰ [mS/cm]
* only possible with cells of the cell constant, 0.010 cm-1
** only possible with cells of the cell constant, 0.010 cm-1 or 0.090 ... 0.110 cm-1
Cell constants
Reference temperature
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Cell constant C
Values
Can be calibrated in
the ranges
0.450 ... 0.500 cm-1
0.585 ... 0.715 cm-1
0.800 ... 1.200 cm-1
Adjustable
0.250 ... 2.500 cm-1
0.090 ... 0.110 cm-1
0.010 cm-1 (fixed)
Reference
temperature
Values
Adjustable
20 °C (Tr20)
25 °C (Tr25)
59
Technical data
Lab 960
Translation of the legally binding German version
Accuracy (± 1 digit)
Variable
Stand October 30, 2009
Accuracy
Temperature of the test
sample
ϰ/ Temperature compensation
None (Off)
± 0.5 %
Nonlinear (nLF)
± 0.5 %
0 °C ... + 35 °C
according to EN 27 888
± 0.5 %
+ 35 °C ... + 50 °C
Extended nLF function
according to WTW
measurements
± 0.5 %
+ 10 °C ... + 75 °C
± 0.1
+ 5 °C ... + 25 °C
± 0.2
+ 25 °C ... + 30 °C
Linear (lin)
SAL / range
0.0 ... 42.0
TDS [mg/l]
±1
T [°C] / temperature sensor
NTC 30
± 0.1
PT 1000
± 0.3
Note
The accuracy values specified here apply exclusively to the meter. The
accuracy of the measuring cell also has to be taken into account.
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Lab 960
Lists
8
Lists
This chapter provides additional information and orientation aids.
Abbreviations
Specialist terms
Index
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The list of abbreviations explains abbreviations that appear on the
display or when dealing with the instrument.
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.
The index helps you to find the topics that you are looking for.
61
Lists
Lab 960
Abbreviations
Conductivity value
62
°C
Temperature unit °Celsius
°F
Temperature unit, °Fahrenheit
AR
AutoRead
An AutoRead measurement is carried out for
stability control (SC).
ARng
Automatic range switch-over: meter measures with
highest possible resolution
AutoStore
Automatic storage in memory
Baud
Baud rate
C
Cell constant cm-1
Cal
The measuring system is being calibrated or works
with a calibrated cell constant.
CELL
Cell constant
disp
Display
Data memory is displayed
E1
Overflow
Display range exceeded
E3
Error message
see chapter 6 WHAT TO DO IF... (page 55)
Ident
ID number
InI
Initialization
Resets individual basic functions to the status they
had on delivery
Int
Interval
IOT
International Oceanographic Tables
Lin
Linear temperature compensation
LoBat
Low Battery
Batteries are almost empty
nLF
Nonlinear temperature compensation
RCL
Recall (memory download)
SAL
Salinity
SC
Stability control (drift control)
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SELV
Safety Extra Low Voltage
Sto
Store (memory)
Sto CIr
Clearing the memory
Sto disp
Download data memory to display
Sto Full
Memory location occupied
Sto Prt
Download data memory to printer/interface
Tauto
Automatic temperature measurement
TC
Temperature coefficient
TDS
Total dissolved solids
TP
Temperature Probe;
Temperature measurement active
Tref 20/T20
Reference temperature 20 °C
Tref 25/T25
Reference temperature of 25 °C
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Lists
Lab 960
Glossary
Adjusting
AutoRange
Name of the automatic selection of the measuring range.
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
Conductivity
Measured value
Characteristic quantity of a conductivity measuring cell, depending on
the geometry.
Short form of the expression, specific electrical conductivity.
It corresponds to the reciprocal value of the resistivity.
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.
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).
Measured variable
The measured parameter is the physical dimension determined by
measuring, e. g. pH, conductivity or DO concentration.
Molality
Molality is the quantity (in Mol) of a dissolved substance in 1000 g
solvent.
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 electrolytic resistivity. It corresponds to the
reciprocal value of the electrical conductivity.
Resolution
Smallest difference between two measured values that can be
displayed by a measuring instrument.
Salinity
Salt content
Stability control
64
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.
The absolute salinity SA of seawater corresponds to the relationship
of the mass of dissolved salts to the mass of the solution (in g/Kg). In
practice, this dimension cannot be measured directly. Therefore, the
practical salinity according to IOT is used for oceanographic
monitoring. It is determined by measuring the electrical conductivity.
General designation for the quantity of salt dissolved in water.
Function to control the measured value stability.
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Lists
Standard solution
TDS
Temperature
coefficient
The standard solution is a solution where the measured value is
known by definition. It is used to calibrate a measuring system.
Total dissolved solids
Calculation: TDS (mg/l) = conductivity (µS) * TDS factor (mg/l*µS)
Value of the slope α of a linear temperature function.
TRef
Temperature
compensation
Temperature function
Test sample
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=
1
Meas * 1 + a * (T - TRef )
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 conductimetric
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.
Name of a mathematical function expressing the temperature
behavior of a test sample, a sensor or part of a sensor.
Designation of the test 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.
65
Lists
66
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Lists
Index
A
ORP voltage . . . . . . . . . . . . . . . . . . . . . . . 23
Authorized use . . . . . . . . . . . . . . . . . . . . . . 14
B
Battery compartment . . . . . . . . . . . . . . 17, 53
Baud rate setting . . . . . . . . . . . . . . . . . . . . 44
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . 26
Calibration evaluation . . . . . . . . . . . . . . . . 28
Cell constant . . . . . . . . . . . . . . . . . . . . . . . 26
Cleaning interval . . . . . . . . . . . . . . . . . . . . 26
Connect the power pack . . . . . . . . . . . . . . 18
E
Energy saving feature . . . . . . . . . . . . . . . . 19
Error message . . . . . . . . . . . . . . . . . . . . . . 55
F
Firmware update . . . . . . . . . . . . . . . . . . . . 69
I
Initial commissioning . . . . . . . . . . . . . . . . . 17
Interval
Calibration . . . . . . . . . . . . . . . . . . . . . . 26
K
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
L
LoBat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
P
Precautions . . . . . . . . . . . . . . . . . . . . . . . . 13
Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
R
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
all meter settings . . . . . . . . . . . . . . . . . 50
Cell constant . . . . . . . . . . . . . . . . . . . . 49
Resolution setting . . . . . . . . . . . . . . . . . . . 46
RS232 interface . . . . . . . . . . . . . . . . . . . . . 41
S
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Sample display . . . . . . . . . . . . . . . . . . . . . . 9
Scope of delivery . . . . . . . . . . . . . . . . . . . . 17
Select a linear
Temperature compensation . . . . . . 34, 36
Setting the date . . . . . . . . . . . . . . . . . . 18, 45
Setting the time . . . . . . . . . . . . . . . . . . 18, 45
Socket field . . . . . . . . . . . . . . . . . . . . . . . . 10
Stability control . . . . . . . . . . . . . . . . . . . . . 25
T
TDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Temperature compensation . . . . . . . . . . . . 34
Nonlinear . . . . . . . . . . . . . . . . . . . . . . . 34
Select a linear . . . . . . . . . . . . . . . . . . . 34
Switch off . . . . . . . . . . . . . . . . . . . . 34, 37
Temperature sensor . . . . . . . . . . . . . . . . . 21
Total dissolved solids . . . . . . . . . . . . . . . . . 24
M
Measurement accuracy . . . . . . . . . . . . . . . 26
MultiLab pilot . . . . . . . . . . . . . . . . . . . . . . . 41
N
Nonlinear
Temperature compensation . . . . . . 34, 35
O
Operation location . . . . . . . . . . . . . . . . . . . 19
Operational safety . . . . . . . . . . . . . . . . . . . 14
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Lists
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Lab 960
Appendix: Firmware update
General information
With the "Update_Labxxx_MxxxP" program and a PC you can update
the firmware of the Lab 960 to the newest version.
For the update you can connect the meter to a PC via the USB or
RS232 interface.
For the update via the USB interface, the following is required:
 a free USB interface (virtual COM port) on your PC
 the driver for the USB interface
(installation see page 45)
 the USB cable Z875 (included in the scope of delivery of the
Lab 960).
For the update via the RS232 interface, the following is required:
 a free RS232 interface on your PC
 the RS232 cable Z390.
Program installation
Program start
Install the firmware update program on your PC with the
"Install_Update_Labxxx_MxxxP_Vx_yy_English.exe" installation
program.
Start the "Update_Labxxx_MxxxP" program from the Windows start
menu. The selected interface is displayed on the left side of the status
bar at the lower edge of the window.
You can change the language via the language menu.
Firmware update
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Proceed as follows:
1
Using the USB interface cable Z875, connect the Lab 960 to an
USB interface (virtual COM port) of the PC.
or
Using the Z390 interface cable, connect the Lab 960 to the
serial interface (COM port) of the PC.
2
Make sure the Lab 960 is switched on.
3
To start the update process click the OK button.
The program automatically recognizes the used interface.
69
Lab 960
4
To go on, follow the instruction of the program.
During the programming process, a corresponding message
and a progress bar (in %) appear.
The programming process takes approx. two minutes.
A terminatory message is displayed after a successful
programming process. The firmware update is now completed.
5
Disconnect the meter from the PC.
The instrument is ready for operation.
After switching the meter off and on you can check whether the meter
has taken over the new software version (see page 56).
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Internet:
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