SCHOTT Instruments Lab 870 User manual

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Lab 870
Operating manual
Laboratory pH meter
with automatic sensor recognition
5
2
2
9
9
6
pH
°C
Lab 870

Lab 870
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Accuracy when going to
press
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.
Warranty We guarantee the instrument described for 3 years from the date of
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.
To ascertain the warranty liability, return the instrument and proof of
purchase together with the date of purchase freight paid or prepaid.
CE conformity SCHOTT Instruments hereby declares that the Lab 870 meter is in
compliance with the essential requirements and the other relevant
provisions of Directive 1999/5/EC.
The EC declaration of conformity can be requested from SCHOTT
Instruments.
Copyright ©2006, SCHOTT Instruments
Reprinting - even in the form of excerpts - is only allowed with the
explicit written authorization of
SCHOTT Instruments.
Printed in Germany.

Lab 870
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Lab 870
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KONFORMITÄTSERKLÄRUNG
DECLARATION OF CONFORMITY
DÉCLARATION DE CONFORMITÉ
Wir erklären in alleiniger
Verantwortung, dass das
Produkt
pH-Meter
Lab 870
auf das sich diese Erklärung
bezieht, übereinstimmt mit
den Angaben im Kapitel
We declare under our sole
responsibility that the
product
pH meter
Lab 870
to which this declaration
relates is in conformity with
the specifications in the
chapter
Nous déclarons sous notre
seule responsabilitéque le
produit
pH-mètre
Lab 870
auquel se réfère cette
déclaration est conforme aux
indications du chapitre
10. Januar, January 10, 10 janvier 2006
AGQSF 0000-A102-00/060110
SCHOTT Instruments GmbH
Hattenbergstr. 10
D-55122 Mainz
Deutschland, Germany, Allemagne
Technische Daten
pH-Meter
Lab 870
10. Januar 2006

Lab 870 Contents
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Lab 870 - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.4 Automatic sensor recognition . . . . . . . . . . . . . . . . . . . . . 11
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 14
3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2.1 Z865 stand (S4D). . . . . . . . . . . . . . . . . . . . . . . . 18
4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2 General operating principles . . . . . . . . . . . . . . . . . . . . . . 20
4.2.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3.1 Measuring the pH value . . . . . . . . . . . . . . . . . . . 22
4.3.2 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . 23
4.4 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.4.1 Calibration interval (Int.C) . . . . . . . . . . . . . . . . . 29
4.4.2 Automatic calibration (AutoCal) . . . . . . . . . . . . . 30
4.4.3 Downloading calibration data . . . . . . . . . . . . . . . 33
4.5 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.5.1 Options for data transmission . . . . . . . . . . . . . . 35
4.5.2 Automatically downloading measurement
datasets at intervals . . . . . . . . . . . . . . . . . . . . . . 36
4.5.3 RS232 interface . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.5.4 USB interface (device) . . . . . . . . . . . . . . . . . . . . 37
4.5.5 Operation with MultiLab pilot . . . . . . . . . . . . . . . 37
4.6 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.6.1 System settings . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.6.2 Measurement settings . . . . . . . . . . . . . . . . . . . . 41
4.6.3 Interval for automatic data transmission . . . . . . 45
4.7 Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
4.7.1 Resetting calibration values . . . . . . . . . . . . . . . . 46

Contents Lab 870
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4.7.2 Resetting all meter settings . . . . . . . . . . . . . . . . 47
5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 49
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.1.1 Replacing the batteries . . . . . . . . . . . . . . . . . . . . 49
5.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.2 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 57
8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Lab 870 Overview
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1Overview
The compact Lab 870 precision pH meter enables you to perform pH
measurements rapidly and reliably. The Lab 870 provides the
maximum degree of operating comfort, reliability and measuring
certainty for all applications.
The proven calibration procedures and special stability control function
(SC) support your work with the pH meter.
Note
The meter is also available as part of individual Sets of equipment.
You will find information on this and other accessories in the SCHOTT
Instruments laboratory catalog or via the Internet.
Note
If you need further information or application notes, you can obtain the
following material from SCHOTT Instruments:
zApplication reports
zpH primers
zSafety datasheets.
1Keypad
2Display
3Socket field
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pH
°C
Lab860
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3

Overview Lab 870
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1.1 Keypad
In this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <OK>) indicates a keystroke in this operating
manual.
<On/Off>:
<On/Off_>:
Switch meter on / off
Reset calibration values
<MODE>:
<MODE_>:
Select measured parameter
Open setting menu for calibration and
measurement
<CAL>:
<CAL_>:
Call up calibration procedure
Display calibration data
<SC>:
<SC_>:
Activate / deactivate stability control
Set interval for data transmission
<▲>: Increment values, scroll
<▼>: Decrement values, scroll
<OK>:
<OK_>:
Confirm entries
Open setting menu for system settings
MODE
CAL
SC

Lab 870 Overview
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1.2 Display
Function display
indicators
8
88
8
8
18
8
8
°C
°F
U pH
%
LoBat
Auto Store
SC
TP
CalError
Time
Day.Month
Year
Baud
No.
Ident
mV/pH
RCL
SET BUFFER
AutoCal
Status display
indicator
CalClock (calibration
interval and sensor
evaluation)
ID sensor symbol
Measured value
display
Function and
temperature display
indicator
SET During calibration: number of the buffer set
BUFFER During calibration: number of the buffer
AutoCal Calibration with automatic buffer recognition
CalError An error occurred during calibration
LoBat With battery operation: batteries almost empty
SC Stability control is active
TP Temperature measurement active

Overview Lab 870
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1.3 Socket field
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 sensors - in particular SCHOTT Instruments sensors -
fulfill these conditions.
Connectors:
1pH electrode
2Reference electrode
3Temperature sensor
4USB interface
5Power pack
6RS 232 interface

Lab 870 Overview
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1.4 Automatic sensor recognition
The automatic sensor recognition function enables
zoperation of a sensor with different meters without recalibration
zoperation of different sensors with a meter without recalibration
zto assign measurement data to a sensor
–measurement datasets are always downloaded to the interface
along with the sensor type and sensor series number
zto assign calibration data to a sensor
–calibration data is always downloaded to the interface along with
the sensor type and sensor series number
To be able to use the automatic sensor recognition function, you need
a meter that supports the automatic sensor recognition (e.g. Lab 870)
and a sensor (ID sensor) that is suitable for sensor recognition.
In ID sensors, sensor data is stored that clearly identifies the sensor.
The sensor data is automatically transmitted to the meter by radio and
used for sensor identification there.
Note
You can also operate non-ID sensors with the Lab 870 meter. In this
case, however, you will not be able to use the advantages of the sensor
recognition function.
DIN
BNC

Overview Lab 870
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ID sensors SCHOTT Instruments ID sensors support the automatic sensor
recognition. "ID" is added to the designation of these sensors, e.g.
electrode BlueLine 14 pH ID.
Note
Information on available ID sensors is given on the Internet or directly
by SCHOTT Instruments.
ID sensors connected to the Lab 870 meter are identified by the ID
sensor symbol on the display of the meter.
Sensor data from
ID sensors
ID sensors transmit the following sensor data
zSensor type
zSensor series number
zCalibration data
–Calibration date
–Calibration characteristics
–Calibration interval
The calibration data is updated in the ID sensor after each calibration
procedure. The ID sensor symbol flashes while this is being done.
Note
The sensor must not be disconnected while the ID sensor symbol is
flashing, as otherwise the calibration data will not be completely
transmitted. The sensor will then have no valid calibration.
Note
If non-ID sensors are used, the calibration data is read out by the meter
and stored in the meter.
8
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pH
°C
TP
ID sensor symbol

Lab 870 Safety
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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 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 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.

Safety Lab 870
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2.1 Authorized use
This meter is authorized exclusively for pH and ORP measurements in
the laboratory.
The technical specifications as given in chapter 7 TECHNICAL DATA
(page 55) 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 55).
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 SCHOTT Instruments.

Lab 870 Safety
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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:
zhas been damaged in transport
zhas been stored under adverse conditions for a lengthy period of
time
zis visibly damaged
zno longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the instrument.
Obligations of the
purchaser
The purchaser of this meter must ensure that the following laws and
guidelines are observed when using dangerous substances:
zEEC directives for protective labor legislation
zNational protective labor legislation
zSafety regulations
zSafety datasheets of the chemical manufacturers.

Safety Lab 870
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Lab 870 Commissioning
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3 Commissioning
3.1 Scope of delivery
zLab 870 laboratory meter
zPower pack
z4 batteries 1.5 V Mignon type AA
zUSB cable with A plug and B plug
zTransparent cover
zStand with stand base (S4D)
zOperating manual
zCD-ROM with USB driver
3.2 Initial commissioning
Perform the following activities:
zSwitch on the meter
zSet the date and time
zConnect the power pack (for line power operation only).
Switching on the meter
Setting the date and
time
Connecting the power
pack Caution
The line voltage at the operating site must lie within the input
voltage range of the original power pack (see page 55).
Caution
Use original power packs only (see page 55).
1Switch on the meter with <On/Off>.
A display test is briefly displayed.
2See page 39.
3Insert the plug into the socket of the pH meter.

Commissioning Lab 870
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Note
You can carry out measurements without the power pack.
3.2.1 Z865 stand (S4D)
The meter can be inserted in the stand base on the right or left side of
the electrode holder.
An arrangement of meter with stand looks, for example, as follows:
4 Connect the original power pack to an easily accessible power
outlet.
1Insert the stand rod in the stand base.
2 Insert the meter in the stand base.

Lab 870 Operation
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4 Operation
4.1 Switching on the meter
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 39).
The energy saving feature is not active:
zif the meter is supplied via the power pack or the USB interface
zif the printer cable is connected (for external printers).
1Place 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).

Operation Lab 870
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4.2 General operating principles
This section contains basic information on the operation of the Lab 870.
4.2.1 Operating modes
The instrument has the following operating modes:
zMeasurement
The display indicates the measurement data in the measured value
display
zCalibration
The display guides you thru a calibration procedure with calibration
information
zTransmitting data
The meter transmits measuring data and calibration records to a
serial interface automatically or manually.
zConfiguration
The system menu or a sensor menu with submenus, settings and
functions is displayed
4.2.2 Operation
Keys The meter is operated via keys. The keys can have different functions
with long or short keystrokes.
Functions 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_>).