wtw inoLab Cond 730 User manual

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.
We cannot guarantee that there are absolutely no errors in
this manual. We are sure you will understand that we cannot
accept any legal claims resulting from the data, figures or
descriptions.
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.
The warranty excludes components that are replaced during
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. 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.
Copyright ©Weilheim 2004, WTW GmbH
Reprinting - even as excerpts - is only allowed with the
explicit written authorization of WTW GmbH, Weilheim.
Printed in Germany.

Cond 730 Contents
3
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Sockets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 General safety instructions. . . . . . . . . . . . . . . . 10
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . 13
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Switch on the instrument . . . . . . . . . . . . . . . . . 17
4.2 Measuring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2.1 Conductivity / Specific resistance . . . . . 21
4.2.2 Salinity . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2.3 TDS (total dissolved solids). . . . . . . . . . 23
4.2.4 Printing/transmitting measured values . 24
4.3 Determining/setting up the cell constant [C] . . . 25
4.3.1 Determining the cell constant
(calibrating) . . . . . . . . . . . . . . . . . . . 25
4.3.2 Setting the cell constant manually . . . . . 29
4.4 Setting up the temperature compensation TC . 32
4.5 Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.5.1 Manual storage . . . . . . . . . . . . . . . . . . . 36
4.5.2 Switching on AutoStore (Int 1). . . . . . . . 38
4.5.3 Outputting the data storage. . . . . . . . . . 40
4.5.4 Clearing the storage . . . . . . . . . . . . . . . 46
4.6 Data transmission. . . . . . . . . . . . . . . . . . . . . . . 47
4.6.1 Data transmission interval (Int 2). . . . . . 47
4.6.2 Recorder (analog output) . . . . . . . . . . . 49
4.6.3 PC/external printer (RS232 interface) . . 50
4.6.4 Operation with MultiLab pilot . . . . . . . . . 51
4.7 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.8 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Contents Cond 730
4
5 Maintenance, cleaning, disposal. . . . . . . . . . . 59
5.1 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . 59
5.1.1 Changing the batteries . . . . . . . . . . . . . 60
5.1.2 Replacing the roll of printer paper . . . . 61
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
6 What to do if.... . . . . . . . . . . . . . . . . . . . . . . . . . 63
7 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . 67
8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Cond 730 Overview
5
1 Overview
The compact inoLab Cond 730 precision conductivity meter
lets you perform conductivity measurements rapidly and reli-
ably.
The inoLab Cond 730 provides the highest degree of oper-
ating comfort, reliability and measuring safety for all applica-
tions.
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
WTW catalog LABORATORY AND FIELD INSTRUMENTATION or
via the Internet.
* only on the Cond 730 with integrated printer
1Keypad
2Display
3Sockets
4Printer*
Cond
730
3
2
1
4

Overview Cond 730
6
1.1 Keyboard
*
1Select measuring mode
2Set up or determine cell constant;
select temperature compensation
3Print LED *
Red: printer off (offline) or malfunction
Green: printer ready for operation (online)
4Printer on/off *
5Paper feed/line feed *
(Only with the printer being off -
Print LED lights up red)
6Reduce values, scroll
7Confirm inputs, start AutoRead
8Increase values, scroll
9Store measured value
10 Activate/deactivate AutoRead function
11 Measuring instrument ON/OFF
12 Display/transmit measured values
* only on the Cond 730 with integrated printer
5
4
3
2
9
8
7
1
12
11
10
6

Cond 730 Overview
7
1.2 Display
1.3 Sockets
Caution
Only connect measuring cells to the instrument that cannot
feed excessive voltages or currents (> SELV and > circuit
with current limiter). Almost all commercial measuring cells
- especially WTW measuring cells - meet these require-
ments.
Connectors:
1Conductivity measuring cell
2RS 232 interface/analog output
3Plug-in power supply
Status line
Measured value display
Function and
temperature display
Sensor symbol
1
2
3

Overview Cond 730
8

Cond 730 Safety
9
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 Cond 730
10
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 chapter
7 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
This instrument is constructed and tested in compliance with
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 chapter 7 TECHNICAL DATA.
If the instrument was transported from a cold environment to
a warm environment, the formation of condensate can lead
to the faulty functioning of the instrument. In this event, wait
until the temperature of the instrument reaches room tem-
perature before putting the instrument back into operation.
Caution
The instrument is only allowed to be opened by personnel
authorized by WTW.