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
5
2
2
9
9
6
pH
°C
Lab860
1
2
3

Overview Lab 870
8ba75555e03 02/2007
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