SCHOTT CG 853P User manual

Laboratory
conductivity meter
CG 853P
ba12246e_2 09/99
Operating Manual
77
Conductivity meter with integrated printer

78
Accuracy when
going to press All details contained in this operating manual are valid data
at the time of going to press. However, SCHOTT may add
details for both technical and commercial reasons, or in or-
der to fulfil legal requirements of different countries. This
does not affect the characteristics described.
Warranty
declaration The designated instrument is covered by a warranty of three
years from the date of purchase.
The instrument warranty extends to manufacturing faults
that are determined within the period of warranty.
Thewarrantyexcludescomponentsthatarereplacedduring
maintenance such as batteries, etc.
The warranty claim extends to restoring the instrument to
readiness for use but not, however, to any further claim for
damages. Improperhandlingor unauthorized openingofthe
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.
Copyright ©Hofheim SCHOTT Geräte GmbH 1999
Reprinting - even as excerpts - is only allowed with the
explicit written authorization of SCHOTT Geräte GmbH,
Hofheim.
Printed in Germany.

List of contents
79
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
1.1 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
1.3 Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
1.4 Declaration of Conformity . . . . . . . . . . . . . . . . . . .85
1.5 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . .92
2.2 General safety instructions . . . . . . . . . . . . . . . . . .92
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . 95
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
4.1 Switch on the instrument . . . . . . . . . . . . . . . . . . . .97
4.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
4.2.1 Conductivity . . . . . . . . . . . . . . . . . . . . . . .101
4.2.2 Salinity . . . . . . . . . . . . . . . . . . . . . . . . . . .102
4.2.3 TDS (total dissolved solids) . . . . . . . . . . .103
4.2.4 Printing/transmitting measured values . .105
4.3 Determining/setting up the cell constant [C] . . . .106
4.4 Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
4.4.1 Manual storage . . . . . . . . . . . . . . . . . . . . .117
4.4.2 Switching on AutoStore (Int 1) . . . . . . . . .119
4.4.3 Outputting the data storage . . . . . . . . . . .121
4.4.4 Clearing the storage . . . . . . . . . . . . . . . . .127
4.5 Data transmission . . . . . . . . . . . . . . . . . . . . . . . .128
4.5.1 Data transmission interval (Int 2) . . . . . . .128
4.5.2 Recorder (analog output) . . . . . . . . . . . . .130
4.5.3 PC/external printer (RS232 interface) . . .131
4.6 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . .132
4.7 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137

List of contents
80
5 Maintenance, cleaning, disposal . . . . . . . . . . . 139
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .139
5.1.1 Changing the batteries . . . . . . . . . . . . . . .140
5.1.2 Replacing the roll of printer paper . . . . . .141
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . 143
7 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Overview
81
1Overview
The compact
CG 853P
precision conductivity meter lets you
perform conductivity measurements rapidly and reliably.
The
CG 853P
provides the highest degree of operating com-
fort, reliability and measuring safety for all applications.
The integrated printer enables the measurements to be
documented in compliance with GLP.
The proven procedures to determine or set up the cell con-
stant support your work with the conductivity meter.
Note
The measuring instrument can also be delivered as part of
a set. Information on this and other accessories is available
in the SCHOTT general catalog.
1Keypad
2Display
3Sockets
4Printer
3
2
1
4

Overview
82
1.1 Keyboard
Measuring instrument ON/OFF
<on/off>
Select measuring mode
<ì>
Set up or determine cell constant; select
temperature compensation <CAL>
Activate/deactivate AutoRead function
<auto read>
Store measured value
<STO>
Display/transmit measured values
<RCL>
Reduce values, scroll
<▼>
Confirm inputs, start AutoRead
<run/enter>
Increase values, scroll
<▲>

Overview
83
Print LED
Red: printer off (offline) or malfunction
Green: printer ready for operation (online)
Printer ON/OFF
<print on/off>
Paper feed/line feed
(Printer off - Print LED lights up red)
<feed>

Overview
84
1.2 Display
1.3 Sockets
Caution
Only connect probes to the instrument that cannot feed
excessive voltages or currents (> SELV and > circuit with
current limiter).
Almost all commercial electrodes - especially SCHOTT
electrodes - meet these requirements.
Connections:
18 pole socket with pin contacts
2RS 232 interface/analog output
3Plug-in power supply
Status line
Measured value display
Function and
temperature display
123

Overview
85
1.4 Declaration of Conformity
29.03.99
SCHOTT Geräte GmbH
Im Langgewann 5
D 65719 Hofheim am Taunus
Deutschland, Germany, Allemagne
29. März, March 29rd, 29, Mars, 1999
AGQSF0000-A060-00/990329

Overview
86
1.5 Technical data
Storage tempera-
ture - 25 °C ... + 65 °C
Operating temper-
ature 0 °C ... + 55 °C
Allowable relative
humidity Annual mean: < 75 %
30 days/year: 95 %
Other days: 85 %
[µS/cm]
[mS/cm]
0.000 ... 1.999
(only with 0.01 cm-1 cell constant )
0.00 ... 19.99
(only with 0.01 cm-1 constant and
0.1 cm-1 cell constant )
0.0 ... 199.9
0 ... 1999
0.00 ... 19.99
0.0 ... 199.9
0 ... 500
SAL 0.0 ... 70.0 according to the IOT
table
TDS [mg/l] 0 ... 1999
Factor can be set in the range
0.40 ... 1.00
T [°C] −5.0 ... + 100.0
T [°F] + 23.0 ... + 212.0
Ambient
temperature
Measuring ranges
and resolution

Overview
87
Given as measuring uncertainty at a confidence level of
95%. All accuracies additionally depend on the accuracies
of the measuring probes.
No compensation:
Accuracy± 0.5 %
Non-linear compensation :
AccuracyTest sample temperature
± 0.5 %0 °C ... 35 °C
according to EN 27 888;
± 0.5 % 35 °C ... 50 °C
extended nLF function according to
SCHOTT measurements
Linear compensation :
AccuracyTest sample temperature
± 0.5 % 10 °C ... 75 °C
(the accuracy percentage always refers
to the measured value!)
SAL Range 0.0 ... 42.0
AccuracyTest sample temperature
± 0.1at 5 °C ... 25 °C
± 0.2 at 25 °C ... 30 °C
TDS [mg/l] 1
T [°C] NTC 30:
Accuracy± 0.1
PT 1000:
AccuracyOperating temperature
± 0.5 0 °C ... 15 °C
± 0.1 15 °C ... 35 °C
± 1 35 °C ... 55 °C
Measuring accuracy
(± 1 digit)

Overview
88
T [°F] NTC 30:
Accuracy± 0.2
PT 1000:
AccuracyOperating temperature
± 0.9 at 32 °F ... 59 °F
± 0.2at 59 °F ... 95 °F
± 1.8 at 95 °F ... 131 °F
C [cm-1] 0.01
0.1
0.250 ... 2.500
C [cm-1] 0.450 ... 0.500
0.800 ... 1.200
TREF [°C] 20
25
Manual [°C] - 5 ... +100
Length [mm] 240
Width [mm] 285
Height [mm] 85
Weight [kg] Approx. 1.3
(without plug-in power supply unit)
Measuring accuracy
(± 1 digit)
(Continuation)
Cell constant,
to be set
Cell constant,
calibrated
Reference tempera-
ture, selectable
Temperature input
Dimensions and
weight

Overview
89
Batteries 4 x 1.5 V AA type alkaline manga-
nese batteries
Runtime Approx. 3000 operating hours
Mains power supply Connection max. overvoltage cat-
egory II:
Plug-in power supply (Euro plug):
Type no.: Z851
Order no.: 28 520 4897
FRIWO FW3288, 11.8134
Friwo Part No. 1816492
Input: 230V ~ / 50 Hz / 23 VA
Output: 6 V = / 1,8 A /10,8 VA
Plug-in power supply (US plug):
Type no.: Z852
Order no.: 28 520 4901
FRIWO FW3288, 11.8451
Friwo Part No. 1816493
Input: 120V ~ / 60 Hz / 21,5 VA
Output: 6 V = / 1,8 A
Plug-in power supply (UK plug):
Type no.: Z849
Order no.: 28 520 4975
FRIWO FW3288, 11.8453
Friwo Part No. 1770896
Input: 230V ~ / 50 Hz / 23 VA
Output: 6 V = / 1,8 A
Interference emission
(generic standard) EN 50081-1
FCC class A
Interference immunity
(generic standard) EN 50082-1
Protective class 3, EN 61010-1
Climatic class 2, VDI/VDE 3540
Power supply
EMC and
VDE norms

Overview
90
Test marks TÜV GS, UL/CUL, CE
Display Multifunctional LCD
Keypad Foil keypad (Polyester)
Data storage Ring store for 200 value pairs, conductivity/salinity/TDS,
temperature
Automatic with Pt
1000/NTC (30 kW)-5 ... 100.0 °C
Manual input -5 ... 100 °C resolution 1K
Measuring cell 8 pole socket with pin contacts
RS interface/
analog output Bidirectional RS 232 interface or
analog output with autom. recogni-
tion of the PC, printer, or recorder
connected
Plug-in power supply 2 pole special Friwo
Print principle Matrix thermoprint
Signs per line 26
Printing width 46.1 mm
Width of printing paper 58 mm
Printing speed 40 signs/sec
Temperature
compensation
Connectors
Printer

Safety
91
2 Safety
This operating manual contains basic instructions that you
must follow during the commissioning, operation and main-
tenance of the instrument. Consequently, all responsible
personnel must read this operating manual before working
with the instrument.
The operating manual must always be available within the
vicinity of the instrument.
Target group This measuring instrument was developed for use in the lab-
oratory.
Thus, we assume that, as a result of their professional train-
ing and experience, the operators will know the necessary
safety precautions to take when handling chemicals.
Symbols used
Caution
indicates instructions that have to be followed to prevent
damage to your instrument.
Warning
indicates instructions that have to be followed to protect
yourself and the instrument from dangerous electrical volt-
age.
Note
Indicates notes that draw your attention to special features.
Note
Indicates cross-references to other documents, e.g. appli-
cation reports, operating manuals of measuring cells, etc.

Safety
92
2.1 Authorized use
This instrument is authorized exclusively for measuring the
conductivity, salinity, temperature and TDS (total dissolved
solids) in the laboratory.
The technical specifications as given in the section
1.5 TECHNICAL DATA, must be 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 unauthorized.
2.2 General safety instructions
Thisinstrument is constructedandtestedin compliancewith
the EN 61010-1 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 instru-
ment can only be guaranteed if the generally applicable
safety measures and the specific safety instructions in this
operating manual are followed.
The smooth functioning and operational safety of the instru-
ment can only be guaranteed under the climatic conditions
specified in the section 1.5 TECHNICAL DATA.
Ifthe instrument wastransportedfrom 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 tem-
perature before putting the instrument back into operation.
Caution
The instrument is only allowed to be opened by personnel
authorized by SCHOTT.

Safety
93
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:
lthe instrument has been damaged in transport
lthe instrument has been stored under adverse conditions
for a lengthy period of time
lthe instrument is visibly damaged
lthe instrument no longer operates as described in this
manual
If you are in doubt contact the supplier of the instrument.
Obligations of the
operator The operator of this measuring instrument must ensure that
the following laws and guidelines are observed when using
dangerous substances:
lEEC directives for protective labor legislation
lNational protective labor legislation
lSafety regulations
lSafety datasheets of the chemical manufacturer.

Safety
94

Commissioning
95
3 Commissioning
Perform the following activities for initial comissioning:
lSet the date and time
lConnect the plug-in power supply (for printer functions).
1 Press and hold down the <ì>key.
2 Press the <on/off> key.
The
display test
appears briefly on the display.
The measuring instrument then switches automati-
cally to the setting of the baud rate.
3 Press the <run/enter> key repeatedly until the date
flashes on the display.
4Set today’s date by pressing <▲> <▼>.
5 Confirm with <run/enter>.
The date (month) flashes on the display.
6 Set the current month by pressing <▲> <▼>.
7 Confirm with <run/enter>.
The year appears on the display.
8 Set the current year by pressing <▲> <▼>.
9 Confirm with <run/enter>.
The hour field flashes on the display.
10 Set the current time by pressing <▲> <▼>.
11 Confirm with <run/enter>.
The minutes field flashes on the display.
12 Set the current time by pressing <▲> <▼>.
13 Confirmwith<run/enter>.Themeasuringinstrument
then switches to the measuring mode.
14 Switch off the instrument by pressing <on/off>.
Setting the date
and time

Commissioning
96
Connecting the
plug-in power
supply
The plug-in power supply supplies the pH meter with low
voltage (7.5 V ... 12 V DC).
Warning
The line voltage on site must lie within the input voltage
range of the original plug-in power supply unit (see section
1.5 TECHNICAL DATA).
Caution
Use original plug-in power supplies only
(see section 1.5 TECHNICAL DATA).
Note
You can also perform measurements without a plug-in
power supply. However, the functions of the integrated
printer can only be used with connected plug-in power sup-
ply.
1Insert the plug (1) into the socket (2) of the conductiv-
ity meter.
2 Connect the original SCHOTT plug-in power supply
(3) to an easily accessible mains socket.
1
2
3
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