Laboratory conductivity meter CG 853P

Operating Manual
Laboratory
conductivity meter
CG 853P
Conductivity meter with integrated printer
ba12246e_2
09/99
77
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 order 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.
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
© 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.
78
List of contents
1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
1.1
1.2
1.3
1.4
1.5
2
Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Declaration of Conformity . . . . . . . . . . . . . . . . . . .85
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
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
79
List of contents
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
80
6
What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . 143
7
Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Overview
1
Overview
The compact CG 853P precision conductivity meter lets you
perform conductivity measurements rapidly and reliably.
The CG 853P provides the highest degree of operating comfort, 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 constant support your work with the conductivity meter.
4
3
2
1
1
Keypad
2
Display
3
Sockets
4
Printer
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.
81
Overview
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
<▲>
82
Overview
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>
83
Overview
1.2
Display
Status line
Measured value display
Function and
temperature display
1.3
Sockets
1
2
3
Connections:
1
8 pole socket with pin contacts
2
RS 232 interface/analog output
3
Plug-in power supply
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.
84
Overview
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
85
Overview
1.5
Ambient
temperature
Measuring ranges
and resolution
86
Technical data
Storage temperature
- 25 °C ... + 65 °C
Operating temperature
0 °C ... + 55 °C
Allowable relative
humidity
Annual mean: < 75 %
30 days/year: 95 %
Other days: 85 %
[µS/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
[mS/cm]
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
Overview
Measuring accuracy
(± 1 digit)
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
87
Overview
Measuring accuracy
(± 1 digit)
(Continuation)
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
Cell constant,
to be set
C [cm-1]
0.01
0.1
0.250 ... 2.500
Cell constant,
calibrated
C [cm-1]
0.450 ... 0.500
0.800 ... 1.200
TREF [°C]
20
25
Temperature input
Manual [°C]
- 5 ... +100
Dimensions and
weight
Length [mm]
240
Width [mm]
285
Height [mm]
85
Weight [kg]
Approx. 1.3
(without plug-in power supply unit)
Reference temperature, selectable
88
Overview
Power supply
Batteries
4 x 1.5 V AA type alkaline manganese batteries
Runtime
Approx. 3000 operating hours
Mains power supply
Connection max. overvoltage category 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
EMC and
VDE norms
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
89
Overview
Test marks
TÜV GS, UL/CUL, CE
Display
Multifunctional LCD
Keypad
Foil keypad (Polyester)
Data storage
Temperature
compensation
Connectors
Printer
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. recognition 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
90
40 signs/sec
Safety
2
Safety
This operating manual contains basic instructions that you
must follow during the commissioning, operation and maintenance 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 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.
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 voltage.
Note
Indicates notes that draw your attention to special features.
Note
Indicates cross-references to other documents, e.g. application reports, operating manuals of measuring cells, etc.
91
Safety
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
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 instrument 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 instrument can only be guaranteed under the climatic conditions
specified in the section 1.5 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 temperature before putting the instrument back into operation.
Caution
The instrument is only allowed to be opened by personnel
authorized by SCHOTT.
92
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:
l
the instrument has been damaged in transport
l
the instrument has been stored under adverse conditions
for a lengthy period of time
l
the instrument is visibly damaged
l
the 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:
l
EEC directives for protective labor legislation
l
National protective labor legislation
l
Safety regulations
l
Safety datasheets of the chemical manufacturer.
93
Safety
94
Commissioning
3
Commissioning
Perform the following activities for initial comissioning:
Setting the date
and time
l
Set the date and time
l
Connect 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 automatically to the setting of the baud rate.
3 Press the <run/enter> key repeatedly until the date
flashes on the display.
4 Set 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 Confirm with <run/enter>. The measuring instrument
then switches to the measuring mode.
14 Switch off the instrument by pressing <on/off>.
95
Commissioning
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).
2
1
3
1 Insert the plug (1) into the socket (2) of the conductivity meter.
2 Connect the original SCHOTT plug-in power supply
(3) to an easily accessible mains socket.
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 supply.
96
Operation
4
Operation
4.1
Switch on the instrument
1 Place the instrument on a flat surface and protect it
against intense light and heat.
2 Connect the conductivity measuring cell to the instrument.
3 Press the <on/off> key.
The display test appears briefly on the display.
The instrument then switches automatically to the
previously selected measuring mode.
4 Check or determine the cell constant [C]. The procedure is described in section 4.3, on page 106.
Note
The instrument has an energy saving feature to avoid
unnecessary battery depletion.
The energy saving feature switches the instrument off if no
key has been pressed for an hour.
The energy saving feature is not active:
l
if the power is supplied by the plug-in power supply
l
if the AutoStore function is active
l
if a PC is connected
l
if the recorder cable is connected
l
if the printer cable is connected
(for external printers)
97
Operation
Checking the cell
constant
1 Press the <CAL> key repeatedly until LF CELL is displayed.
2 Press the <run/enter> key.
The previously selected cell constant ist displayed,
e. g. 0.475 cm-1 with a calibrated cell constant.
3 To return to the measuring mode: press the <ì> key
when the correct cell constant ist displayed.
4 If a different cell constant is to be set, proceed according to section 4.3 DETERMINING/SETTING UP THE
CELL CONSTANT [C].
98
Operation
4.2
Preparatory
activities
Measuring
Perform the following activities when you want to measure:
1 Connect the measuring cell to the instrument.
2 Adjust the temperature of the test solutions or measure the current temperature if the measurement is
made without a temperature probe.
3 Calibrate the instrument with the measuring cell or
check the cell constant set up.
4 Select the measuring mode by pressing <ì>.
Caution
When connecting an earthed PC/printer, measurements
cannot be performed in earthed media as incorrect values
would result.
The RS232 interface is not galvanically isolated.
Temperature probe
Measurements can be performed with and without a temperature probe. A connected temperature probe is indicated by
TP on the display.
If you want to use a SCHOTT conductivity measuring cell
without a temperature probe, you have to connect it with an
adapter (available at SCHOTT).
Note
The conductivity meter automatically recognizes the type of
the temperature probe used. As a result, you can connect
electrodes with the NTC30 or Pt1000.
The temperature measurement is absolutely essential for a
reproducible conductivity measurement. If the measurement is made without a temperature probe, proceed as follows:
1 Determine the current temperature using a thermometer.
2 Set up the temperature by pressing <▲> <▼>.
99
Operation
AutoRead AR
(Drift control)
The AutoRead function (drift control) checks the stability of
the measurement signal. The stability has a considerable
effect on the reproducibility of the measured value.
1
Call up the measuring mode by pressing <ì>.
2 Activate the AutoRead function by pressing
<auto read>.
The current measured value is frozen (Hold function).
3 Start the AutoRead function by pressing
<run/enter>.
AR flashes on the display until a stable measured value is reached.
This measured value is transmitted to the interface.
.
4 If necessary, start the next AutoRead measurement
by pressing <run/enter>.
5 To terminate the AutoRead function: Press the
<auto read> key.
Note
The current AutoRead measurement (with acceptance of
the current value) can be terminated at any time by pressing
<run/enter>.
100
Operation
4.2.1 Conductivity
To measure the conductivity, proceed as follows:
1 Perform the preparatory activities according to section 4.2.
2 Immerse the conductivity measuring cell into the test
sample.
3 Press the <ì> key until
appears in the status display. The conductivity value appears on the display.
4 If necessary, set the temperature by pressing
<▲> <▼> (see section 4.2, page 99).
5 Perform an AutoRead measurement according to
section 4.2.
101
Operation
4.2.2 Salinity
To measure the salinity, proceed as follows:
1 Perform the preparatory activities according to section 4.2.
2 Immerse the conductivity measuring cell into the test
sample.
3 Press the <ì> key repeatedly until Sal appears in the
status line. The salinity value of the sample appears
on the display.
4 If necessary, set the temperature by pressing
<▲> <▼> (see section 4.2, page 99).
5 Wait for a stable measured value.
6 Perform an AutoRead measurement according to
section 4.2.
102
Operation
4.2.3 TDS (total dissolved solids)
To measure the TDS, proceed as follows:
1 Perform the preparatory activities according to section 4.2.
2 Immerse the conductivity measuring cell into the test
sample.
3 When measuring with an integrated temperature
probe continue with step 4.
When measuring without temperature probe:
– Determine the temperature of the test sample using
a thermometer
– Press the <ì> key repeatedly until
the status line
appears in
– Enter the temperature using <▲> <▼>.
4 Press the <ì> key repeatedly until TDS appears in
the status line. The TDS value of the sample appears
on the display.
5 Set up the TDS factor (0.40 ... 1.00) using <▲> <▼>.
6 Wait for a stable measured value.
103
Operation
7 Perform an AutoRead measurement according to
section 4.2.
104
Operation
4.2.4 Printing/transmitting measured values
Measured values (data records) can be:
l
printed on the integrated printer or
l
transmitted to the interface.
Note
To print, you must switch on the printer using the Print key
<print on/off> (Print LED lights up green).
To transmit to the interface, you must connect the interface
cable. The integrated printer is then switched off automatically.
You can print measured values (data records) in 3 ways:
l
Switch on the data transmission (Int 2) (see page 128)
– After expiry of the selected interval, the current data
record is sent to the printer/interface.
l
Switch on AutoStore (Int 1) (see page 119)
– After expiry of the selected interval, the current data
record is sent to the printer/interface and in addition is
stored in the data store of the instrument
– AutoStore (Int 1) covers the data transmission interval
(Int 2).
l
Press the <run/enter> key
This manually triggers a printout of the current measured
values at any time - independently of the selected intervals.
Note
If you connect a recorder (analog output), both the output to
the integrated printer and the digital output are switched off.
105
Operation
4.3
Why determine/set
up the cell
constant?
Determining/setting up the cell constant [C]
Due to ageing, 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.
You can determine the cell constant of the conductivity measuring cell in the range 0.450 ... 0.500 cm-1 or 0.800 ... 1.200
cm-1 by calibrating in the control standard or set it up manually in the range 0.250... 2.500 cm-1. Additionally, you can
select one of the fixed cell constants 0.1 cm-1 or 0.01 cm-1.
Determining the cell
constant
(calibration in
control standard)
Determine the cell constant as follows:
1 Press the <CAL> key repeatedly until LF CELL appears on the display.
2 Press the <run/enter> key repeatedly to go to the
"Determining/ setting up the cell constant" function.
3 Press the <CAL> key repeatedly until the following is
displayed.
106
Operation
4 Immerse the measuring cell into the 0.01 mol/l KCL
control standard.
5 Press the <run/enter> key.
– If no temperature probe is connected, enter the
current temperature of the solution using <▲> <▼>
and confirm with <run/enter>
– If a temperature probe is connected, the AR
measurement to determine the cell constant starts.
flashes until a stable signal is achieved. The
determined cell constant ist displayed; the
measuring instrument automatically stores the cell
constant.
Note
If error message appears see chapter 6 WHAT TO DO IF...
AutoRead
During calibrating, the AutoRead function is automatically
activated. The AR display flashes. The calibration procedure
is finished when the AR display stops flashing.
107
Operation
Note
This method of automatically determining the cell constant
by calibrating in the 0.01 mol/l KCL control standard can
only be used for measuring cells with a cell constant in the
range 0.450 ... 0.500 cm-1 or 0.800 ... 1.200 cm-1.
Calibration
evaluation
After calibrating, the instrument automatically evaluates the
current condition of the calibration.
The evaluation appears on the display.
Cell constant [cm-1]
Display
0.450 ... 0.500 cm-1
0.800 ... 1.200 cm-1
Perform error elimination
according to chapter
6 WHAT TO DO IF...
Calibration protocol
outside of the ranges
0.450 ... 0.500 cm-1
or
0.800 ... 1.200 cm-1
The calibration protocol contains the calibration data of the
current calibration.
Note
You can automatically print out a calibration protocol after
the calibration. To do so, switch on the printer before the calibration (Print LED lights up green). After a valid calibration,
the protocol is printed.
CALIBRATION PROTOCOL
14.04.99
11:37
Device No.: 99990000
CALIBRATION CONDUCTIVITY
Cal Time: 14.04.99 / 11:37
Cal Interval: 180d
Cal Std.:
0.01 mol/l KCL
40.0 °C
Conduct./Tref25: 1413µS/cm
Cell Const : 0.975
1/cm
Probe :
+++
108
Operation
Calibration interval
(Int 3)
The flashing sensor symbol reminds you to calibrate regularly. After the selected calibration interval (Int 3) expires,
the sensor symbol flashes. Measurements can continue.
Note
To ensure the high measuring precision of the measuring
system, perform a calibration after the calibration interval
expires.
Setting the
calibration interval
The calibration interval (Int 3) is set to 180 days in the factory. The interval can be changed (1 ... 999 days):
1 Switch off the instrument.
2 Press <ì> and hold down the key.
3 Press the <on/off> key.
The display test appears briefly on the display.
The instrument then switches automatically to the
configuration level.
4 Press the <run/enter> key until Int 3 appears on the
display.
5 Press <▲> <▼> to set the required time interval until
the next calibration.
6 Confirm with <run/enter>.
7 Change to the measuring mode by pressing <ì>.
109
Operation
Setting up the cell
constant manually
To set up the cell constant manually, proceed as follows:
1 Press the <CAL> key repeatedly until LF CELL appears on the display.
2 Press the <run/enter> key.
3 Press the <CAL> key repeatedly until the cell constant to be set, e. g. 0.475 cm-1 is displayed:
4 Set up the cell constant to be used by pressing
<▲> <▼>, e. g. 0.614 cm-1.
5 To return to the measuring mode: press the <ì> key.
110
Operation
Note
The cell constant to be set up must either be taken from the
operating manual of the measuring cell or is printed on the
measuring cell.
Selecting the
0.1 cm-1
cell constant
To select the 0.1 cm-1 cell constant proceed as follows:
1 Press the <CAL> key repeatedly until LF CELL appears on the display.
2 Press the <run/enter> key.
3 Press the <CAL> key repeatedly until the 0.100 cm-1
cell constant appears on the display.
4 To return to the measuring mode: press the <ì> key.
111
Operation
Selecting the
0.01 cm-1
cell constant
To select the 0.01 cm-1 cell constant proceed as follows:
1 Press the <CAL> key repeatedly until LF CELL appears on the display.
2 Press the run/enter> key.
3 Press the <CAL> key repeatedly until the 0.010 cm-1
cell constant appears on the display.
4 To return to the measuring mode: press the <ì> key.
112
Operation
Setting up the
temperature
compensation TC
The calculation of the temperature compensation is based
on the preset reference temperature, Tref 20 or Tref 25 (see
chapter 4.6 CONFIGURATION).
You can select one of the following temperature compensations:
ips
Application
notes
l
Non-linear temperature compensation "nLF"
according to DIN 38404 or EN 27 888
l
linear temperature compensation "Lin" with a
coefficient that can be set in the range 0.001 ... 3.000 %/K
l
no temperature compensation
Note
Select the following temperature compensations to work
with the test samples given in the table:
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,
113
Operation
Selecting the nonlinear temperature
compensation
To select the non-linear temperature compensation proceed
as follows:
1 Press the <CAL> key repeatedly until LF tc appears
on the display.
2 Press the <run/enter> key.
3 Press the <CAL> key repeatedly until nLF appears
on the display.
4 To return to the measuring mode: press the <ì> key.
114
Operation
Selecting the linear
temperature
compensation
To select the linear temperature compensation proceed as
follows:
1 Press the <CAL> key repeatedly until LF tc appears
on the display.
2 Press the <run/enter> key.
3 Press the <CAL> key repeatedly until the adjustable
linear temperature coefficient appears on the display.
4 Set up the temperature coefficient, e. g. 1.880 %/K
using <▲> <▼>.
5 To return to the measuring mode: press the <ì> key.
115
Operation
Switching off the
temperature
compensation
To switch off the temperature compensation proceed as follows:
1 Press the <CAL> key repeatedly until LF tc appears
on the display.
2 Press the <run/enter> key.
3 Press the <CAL> key repeatedly until the following
display appears.
4 The temperature compensation has been switched
off.
5 To return to the measuring mode: press the <ì> key.
116
Operation
4.4
Storing
The conductivity meter has an internal data storage device.
Up to 200 data records can be stored in it.
A complete data record consists of:
l
Memory location
l
Date
l
Time
l
Measured value
l
Temperature
l
I.D. number
You can transmit measured values (data records) to the
data storage in 2 ways:
l
Manual storage
l
Switching on the AutoStore function (Int 1), see page 119
4.4.1 Manual storage
You can transmit a measured value to the data storage as
follows:
1 Press the <STO> key.
The current number of the next free memory location
appears on the display.
117
Operation
2 Confirm with <run/enter>.
The display changes to the input of the I.D. number.
3 Enter the required I.D. number (1 ... 999) by pressing
<▲> <▼>.
4 Confirm with <run/enter>.
The instrument changes to the measuring mode.
*(+,, message
This message appears if all 200 memory locations are full.
You have the following options:
118
Store the current measured value.
The oldest measured value (memory
location 1) is overwritten by this
Press
<run/enter>
Return to the measuring mode without
storing
Press any key
Output the data storage
See section 4.4.3
Delete the data storage
See section 4.4.4
Operation
4.4.2 Switching on AutoStore (Int 1)
The storage interval (Int 1) determines the time interval
between automatic storage processes.
After the time interval expires, the current data record is
transmitted to the data storage and to the interface.
The storage interval (Int 1) is set to OFF in the factory.
Thus, the AutoStore function is switched off.
To switch the function on, set up a time interval (5 s, 10 s,
30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min).
Note
If the AutoStore function is active, the setting of the data
transmission interval (int 2) is ineffective (see page 128).
Setting the storage
interval
1 Press and hold down the <run/enter> key.
2 Press the <STO> key. Int 1 appears on the display.
3 Press the <▲> <▼> keys to set up the required time
interval between storage processes.
4 Confirm with <run/enter>.
The number of free memory locations appears on the
display.
119
Operation
5 As soon as all 200 memory locations are full, the AutoStore function is terminated (Int 1 = OFF).
If too few storage locations are available for your
measurements:
– backup the data storage (see page 121) and
– clear the data stored (see page 127).
6 Confirm with <run/enter>.
The prompt for the I.D. number appears on the display.
7 Press <▲> <▼> to set the required I.D. number.
8 Confirm with <run/enter>.
The instrument changes to the measuring mode and
starts the measuring and storage procedure.
AutoStore flashes on the display.
Note
The AutoStore function is interrupted if you perform other
functions, e.g. output data storage.
After completing the other function, the AutoStore function
continues. However, as a result, gaps can occur in the
recording of the measured values.
120
Operation
Switching off the
AutoStore
Switch off the AutoStore function by:
l
Setting the storage interval (Int 1) to OFF or
l
Switch the conductivity meter off and on again.
4.4.3 Outputting the data storage
The contents of the data storage can be output to the:
Outputting to the
display
l
display
l
interface
1 Press the <RCL> key repeatedly until Sto disp appears on the display.
2 Press the <run/enter> key.
A measured value appears on the display.
The I. D. number of the data record appears for approx. 2 s.
121
Operation
3 After 2 s the respective temperature of the data
record appears on the display. Stored data records
are displayed together with the RCL display indicator.
You can perform the following activities:
Display further parameters of the data
record (I.D. no., date, time, memory location)
Press
<run/enter>
Advance one data record (memory location) Press <▲>
Go back one data record (memory location) Press <▼>
122
Operation
Note
If you want to find a specific parameter (e.g. date), proceed
as follows:
1 Press the <RCL> key repeatedly until Sto disp appears on the display.
2 Press the <run/enter> key.
A measured value appears on the display.
The I. D. number of the data record appears for approx. 2 s.
3 After 2 s the respective temperature of the data
record appears on the display.
4 Select the parameter (e.g. date) by pressing
<run/enter>.
5 Press <▲> or <▼> repeatedly until the required date
appears on the display.
After approx. 2 s, the temperature of the displayed
measured value appears.
123
Operation
Outputting to the
interface
1 Press the <RCL> key repeatedly until Sto SEr appears on the display.
2 Press the <run/enter> key.
The protocol of the last calibration is transmitted to
the printer/RS interface. In the meantime, Sto CAL
appears on the display.
Following the calibration protocol, the complete contents of the storage is transmitted to the interface.
Note
You can cancel the transmission by pressing <ì> or
<run/enter>.
124
Operation
Sample printout
CALIBRATION PROTOCOL
14.04.99
11:37
Device No.: 99990000
CALIBRATION CONDUCTIVITY
Cal Time: 14.04.99 / 11:37
Cal Interval: 180d
Cal Std.:
0.01 mol/l KCL
23.0 °C
Conduct./Tref25: 1413 µS/cm
Cell Const : 0.975
1/cm
Probe:
+++
No.
1:
01.01.99
00:04
2.40 mS/cm
25
°C
Tman
nLF
Tref25 C = 0.475 1/cm
Ident : 1
No.
2:
10.01.99
10:09
2.40 mS/cm
25.3 °C
Tauto
nLF
Tref25 C = 0.475 1/cm
Ident : 1
No.
3:
12.01.99
01:48
2.40 mS/cm
21.6 °C
Tauto
nLF
Tref25 C = 0.475 1/cm
Ident : 1
The printout
contains:
l
Calibration protocol:
– Date/time of the printout
– Instrument number (Device No.)
– Date/time of the calibration (Cal Time)
– Calibration interval (Cal Interval)
– Calibration standard 0.01 mol/l KCL (Cal Std.) [°C/F]
– Conductivity of the calibration standard at 25 °C
(Conduct./Tref25)
– Cell constant (Cell Const)
– Probe evaluation (Probe)
125
Operation
l
Contents of the measuring storage:
– Number of the storage location (No.)
– Date/time of measurement
– Measured value/unit (mS/cm) [°C/F]
– Automatic/manual temperature measurement
(Tauto/Tman)
– Temperature compensation (nLF)
– Tref
– Cell constant (1/cm)
– AutoRead function (AR)
– I.D. number (Ident)
126
Operation
4.4.4 Clearing the storage
This function can erase the stored data records. 200 memory locations will then become available again.
Note
The Clear store function only appears if data records have
already been stored in the storage. Otherwise, the conductivity meter automatically changes to the measuring mode.
In order to delete all the data records, proceed as follows:
1 Switch off the instrument.
2 Press and hold down the <STO> key.
3 Press the <on/off> key.
The display test appears briefly on the display.
4 Confirm the clearing process by pressing
<run/enter>.
Pressing any other key stops the clearing process
and the data records remain in the storage.
Note
The calibration data remain in the storage and can be called
up via the calibration protocol.
127
Operation
4.5
Data transmission
You can use the following options to transmit data:
l
One of the following options:
– The AutoStore function (page 119) is used to
periodically (Int 1 storage interval) save measured
values internally and output them on the interface.
– The data transmission interval (Int 2) function is used to
periodically output measured values to the interface
(see below).
l
The Output data store function (page 121) is used to output calibration data and stored measured values to the interface.
l
The analog recorder output (page 130) is used to output
measured values as voltages.
4.5.1 Data transmission interval (Int 2)
The interval for the data transmission (Int 2) determines the
time interval between automatic data transmissions. After
the time interval expires, the current data record is transmitted to the printer/RS interface.
Note
The setting of the interval (Int 2) only has an effect when the
storage interval (AutoStore function) is switched off.
128
Operation
Setting the
data transmission
interval
The interval is set to OFF in the factory.
To start the data transmission, set up an interval (5 s, 10 s,
30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min):
1 Press and hold down the <run/enter> key.
2 Press the <auto read> key.
Int 2 appears on the display.
3 Press <▲> <▼> to set up the required time interval
between storage processes.
4 Confirm with <run/enter>.
The instrument changes automatically to the measuring mode.
Note
If the AutoStore function is active, the data transmission is
performed according to the setting of the storage interval
(Int1). Set the storage interval (Int1) to OFF to activate the
data transmission interval (Int2).
Note
You can also set the data transmission interval (Int2) in the
Configuration menu (see page 128).
129
Operation
4.5.2 Recorder (analog output)
You can transmit the data to a recorder via the analog output. Connect the analog output to the recorder via the Z394
interface cable.
The data output switches automatically to recorder output.
1 Free
2 Plug coding
3 Ground
4 Analog output
(Internal resistance < 5 Ohm)
Socket assignment
Note
Activate the analog output by connecting 2 and 3 or use the
original cable.
The signal range of the analog output depends on the measured parameter and the measuring range:
Conductivity/
resistance
Salinity
TDS
130
Measuring range
Voltage
Resolution
0.000 ... 1.999 µS/cm
0 ... 1999 mV
1 mV
0.00 ... 19.99 µS/cm
0 ... 1999 mV
1 mV
0.0 ... 199.9 µS/cm
0 ... 1999 mV
1 mV
0 ... 1999 µS/cm
0 ... 1999 mV
1 mV
0.00 ... 19.99 mS/cm
0 ... 1999 mV
1 mV
0.0 ... 199.9 mS/cm
0 ... 1999 mV
1 mV
0 ... 500 mS/cm
0 ... 500 mV
1 mV
Measuring range
Voltage
Resolution
0 ... 70.0
0 ... 700 mV
1 mV
Measuring range
Voltage
Resolution
0 ... 1999 mg/l
0 ... 1999 mV
1 mV
Operation
4.5.3 PC/external printer (RS232 interface)
You can transmit data to a PC or an external printer via the
RS232 interface.
Connect the interface to the instrument via the Z395 cable
(PC) or Z391 cable (external printer).
The data output switches automatically to RS232.
Note
The RS232 interface is not galvanically isolated.
If it is connected to an earthed PC/printer, measurements
cannot be made in earthed media as this would give incorrect results!
Set up the following transmission data on the PC/printer:
Baud rate
Selectable between:
1200, 2400, 4800, 9600
Handshake
RTS/CTS + Xon/Xoff
PC only:
Socket assignment
Parity
None
Data bits
8
Stop bits
1
1 CTS
2 RxD
3 Ground
4 TxD
131
Operation
4.6
Configuration
You can adapt the conductivity meter to your individual
requirements. To do this, the following parameters can be
called up/changed (the status on delivery is marked in bold):
Baud rate
1200, 2400, 4800. 9600
Data transmission interval (Int 2)
OFF, 5 s, 10 s, 30 s,
1 min, 5 min, 10 min,
15 min, 30 min, 60 min
Calibration interval (Int 3) 1 ... 180 ... 999 d
AutoRange ARng
yes, no
TREF 25/TREF 20
t25 or t20
Measured values given
as conductivity or resistance values
S/cm or MΩ
Temperature unit
°C or °F
Date/time
as required
Note
You can leave the configuration menu at any time.
Parameters that have already been changed are stored.
To do this, press the <ì> key.
1 Switch off the instrument.
2 Press and hold down the <ì> key.
3 Press the <on/off> key.
The display test appears briefly on the display.
The instrument then switches automatically to the
setting of the baud rate.
132
Operation
Baud rate
4 Set up the required baud rate by pressing <▲> <▼>.
5 Confirm with <run/enter>.
Int 2 appears on the display.
Data transmission
interval
6 Set up the required time interval by pressing
<▲> <▼>.
7 Confirm with <run/enter>.
Int.3 appears on the display.
133
Operation
Calibration
interval
8 Set up the required time interval by pressing
<▲> <▼>.
9 Confirm with <run/enter>.
ARng appears on the display.
ARng (AutoRange)
10 With <▲> <▼> select between YES and no.
11 Confirm with <run/enter>.
t25 appears on the display.
134
Operation
Reference
temperature
12 With <▲> <▼> select between t25
.
and t20
13 Confirm with <run/enter>. LF appears on the display.
Conductivity
14 With <▲> <▼> select between S/cm and MΩ.
15 Confirm with <run/enter>.
USE °C appears on the display.
Temperature unit
16 Select between °C and °F by pressing <▲> <▼>.
17 Confirm with <run/enter>.
The date flashes on the display.
135
Operation
Date and time
18 Set today’s date by pressing <▲> <▼>.
19 Confirm with <run/enter>.
The date (month) flashes on the display.
20 Set the current month by pressing <▲> <▼>.
21 Confirm with <run/enter>.
The year appears on the display.
22 Set the current year by pressing <▲> <▼>.
23 Confirm with <run/enter>.
The hours flash on the display.
24 Set the current time by pressing <▲> <▼>.
25 Confirm with <run/enter>.
The minutes flash on the display.
26 Set the current time by pressing <▲> <▼>.
27 Confirm with <run/enter>.
The instrument changes automatically to the conductivity measuring mode.
136
Operation
4.7
Reset
You can reset (initialize) measuring and configuration
parameters separately from one another.
Measuring
parameters
The following measuring parameters (Cond InI) are reset to
the values they had on delivery:
Measuring mode
Cell constant
0.475 cm-1 (calibrated)
0.475 cm-1 (set up)
Temperature
compensation
nLF
Reference temperature
Temperature coefficient of 2.000 %/K
the linear temperature compensation
TDS factor
1.00
Note
When the measuring parameters are reset, the calibration
data are lost. After the parameters have been reset, calibrate!
Configuration
parameters
The following configuration parameters (InI) are reset to the
values they had on delivery:
Baud rate
4800
Interval 1
(automatic storing)
OFF
Interval 2
(for data transmission)
OFF
137
Operation
Resetting
measuring
parameters
1 Press and hold down the <run/enter> key.
2 Press the <CAL> key.
3 Use <▲> <▼> to toggle between no and yes.
yes: reset measuring parameters.
no: retain settings.
4 Confirm with <run/enter>.
The instrument changes to the configuration parameters.
Resetting
configuration
parameters
5 Toggle between no and yes by pressing <▲> <▼>.
yes: reset configuration parameters.
no: retain settings.
6 Confirm with <run/enter>.
The instrument changes automatically to the conductivity measuring mode.
138
Maintenance, cleaning, disposal
5
Maintenance, cleaning, disposal
5.1
Maintenance
The maintenance tasks are restricted to the following activities:
l
replacing the batteries and
l
replacing the roll of printer paper.
Note
See the relevant operating manual of the electrode for
instructions on maintenance.
139
Maintenance, cleaning, disposal
5.1.1 Changing the batteries
1 Open the battery compartment (1) on the underside
of the instrument.
2 Remove the four batteries from the battery compartment.
3 Insert four new batteries (Type Mignon AA) into the
battery compartment.
4 Close the battery compartment (1).
The date (day) flashes on the display.
5 Set up the date and time according to chapter 3 COMMISSIONING.
1
Caution
Make sure that the poles of the batteries are the right way
round.
The ± signs in the battery compartment must correspond to
the ± signs on the batteries.
Only use leakproof alkaline manganese batteries.
140
Maintenance, cleaning, disposal
5.1.2 Replacing the roll of printer paper
1 Switch off the printer (Print LED lights up red).
2 Open the lid of the printer (1).
3 Remove the empty roll of paper (2).
4 Insert the new roll of paper:
– Fold the leading edge of the paper inwards and
thread it into the printer (3) from underneath.
– Press the <feed> Print key (paper feed).
5 Close the lid of the printer (1).
1
2
3
Note
Only use original SCHOTT HQ thermal paper. Information
on this is given in the SCHOTT general catalog.
141
Maintenance, cleaning, disposal
5.2
Cleaning
Occasionally wipe the outside of the measuring instrument
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
Disposal
Packing
The measuring instrument is sent out in a protective transport packing.
We recommend: Keep the packing material. It protects the
instrument against damage during transport.
Batteries
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
In compliance with §14 of the BATTERY REGULATION, we
would like to point out that 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 in household refuse.
Measuring
instrument
142
Dispose of the measuring instrument as electronic waste at
an appropriate collection point. It is illegal to dispose of them
in household refuse.
What to do if...
6
Error message,
I/
Error message,
What to do if...
Cause
– Measuring cell not
connected
– Connect measuring
cell
– Cable broken
– Replace electrode
Cause
Remedy
– Measuring cell
contaminated
– Clean measuring cell;
if necessary, replace it
– Unsuitable calibration
solution
– Check calibration
solutions
Cause
LoBat
Remedy
– Batteries almost
depleted
Instrument does not
react to keystroke
Cause
*(
display
Cause
– Operating state
undefined or EMC
electric stress unallowed
– Timeout of the interface
Remedy
– Replace batteries
(see section 5.1
MAINTENANCE)
Remedy
– Processor reset:
Press the <auto read>
key and switch on
instrument
Remedy
– Check connected
instrument
143
What to do if...
Integrated printer
does not print
Cause
Remedy
– Printer switched off
– Switch on printer
– No mains power supply
connected
– Connect mains power
supply
– Interface cable
connected
– Unplug cable
– No paper available
– Replace roll of paper
– AutoStore function is
switched on with a longer
interval duration (Int 1)
– Switch off AutoStore
function (see page 121)
Integrated printer
prints automatically
Cause
Remedy
– AutoStore function
(Int 1) or Data
transmission (Int 2) is
switched on
– Switch off functions
(see page 121/page 128)
Print key <feed>
does not react
Cause
Remedy
– Printer is switched on
– Switch off printer
– Interface cable
connected
– Unplug cable
Printer operating paper not
being printed
Cause
Remedy
– Paper inserted with
wrong side upwards
– Turn the roll of paper
around and insert it with
the other side upwards
*(+,,
message
Cause
Remedy
144
– All 200 memory
locations are full
– Output data storage and
clear data storage
(see page 127)
Lists
7
Lists
This chapter provides additional information and orientation
aids.
Abbreviations
The list of abbreviations explains abbreviations that appear
on the display or when dealing with the instrument.
Specialist terms
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.
Index
The index helps you find the topics that you are looking for.
145
Lists
Abkürzungsverzeichnis
Conductivity value
146
ABS
Plastic housing
AR
AutoRead (drift control)
ARng
Automatic range switching
Measuring instrument measures with highest resolution
AutoStore
Automatic storing
Baud
Baud rate
C
Cell constant cm-1
Cal
Calibration
CELL
Cell constant
disp
Display
Output of the data storage on the display
E3
Error message (see chapter 6 WHAT TO DO
IF...)
Ident
I. D. number
InI
Initialization
Resets individual basic functions to
the status they had on delivery
Int
Interval
Lin
Linear temperature compensation
LoBat
Low Battery
Batteries are almost empty
nLF
Non-linear temperature compensation
OFL
Overflow
Display range exceeded
Sal
Salinity
SELV
Safety Extra Low Voltage
Lists
Sto CIr
Clear storage
Sto disp
Output of the data storage on the display
Sto Full
Memory full
Sto SEr
Output of the data storage to the 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 25 °C
°C
Temperature unit °Celsius
°F
Temperature unit Fahrenheit
147
Lists
Glossary
AutoRead
Monitors the electrode drift and releases the measured
value only after the stability criterion has been reached. In
this way, this procedure ensures the highest degree of precision and reproducibility.
Calibration
The cell constant is determined through calibration. To do
so, the conductivity measuring cell is immersed into a series
of aqueous salt solutions with exactly known electric conductiviy. The relevant conductivity values are determined
using the conductivity measuring instrument.
Cell constant
Conductivity
Control standard
solution
148
Linear factor describing the geometrical dimensions of a
measuring cell and its electrodes.
l
With the value of the cell constant you can roughly describe the application range of a conductivity measuring
cell.
l
The cell constant is determined through calibration in one
or several calibration solutions.
The conductivity value is a sum parameter for the ion concentration of a test sample.
Solution with a known conductivity to determine or check the
conductivity.
Drift control
See AUTOREAD.
Reference
temperature
In order to compare values measured at different temperatures, the values have to be converted to a fixed temperature. This temperature is 25 °C, or, as an exception, 20 °C.
Lists
Resistance
Salinity
Temperature
compensation (TC)
Test sample
Total dissolved
solids (TDS)
All substances (solids, liquids, or gases) with mobile charge
carriers like for example electrons or ions have a finite ohmic
resistance, which means they have an electric conductance
that can be measured or an electric conducitivtiy.
The salinity is a sum parameter especially for seawater;
it gives the salt content of seawater.
The temperature has a very strong impact on the electrical
conductivity. To be able to compare measured values, it is
necessary to temper or convert the test sample to a reference temperature.
The substance to be measured. It can be liquid or solid.
Mass that remains of the substances dissolved in an aqueous solution after a fixed filtering and drying procedure, as
far as these substances are not volatile under the conditions
of this procedure. The total dissolved solids refer to the volume of the filtered aqueous sample used und are given in
mg/l.
149
Lists
150
Lists
Index
A
analog output 130
authorized use 92
AutoRange 134
AutoRead 100
AutoStore 119
B
batteries
replacing 139
battery compartment 140
baud rate, setting 133
C
calibration 106
interval 109
protocol 108
calibration evaluation 108
cell constant 98, 106
changing the batteries 140
cleaning 142
commissioning 95
condition on delivery 137
conductivity 135
conductivity measurement 101
conductivity/resistance 130
D
data record 117
data transmission (interval) 129
date, setting 136
display 84
disposal 142
drift control 100
E
energy saving feature 97
error messages 143
I
initialize 137
interval
calibration (Int 3) 109
storing (Int 1) 119
K
keys 82
L
linear temperature compensation 113,
115
LoBat 143
M
maintenance 139
manual storing 117
measuring 99
measuring precision 109
N
no temperature compensation 113
non-linear temperature compensation
113, 114
O
operation 97
operational safety 92
output data storage 121
P
paper roll
replacing 139
place of the instrument 97
plug-in power supply
connecting 96
printing
calibration protocol 108
measured values 105
151
Lists
R
recorder output 130
reference temperature 135
replacing the roll of printer paper 141
reset 137
RS232 interface 131
S
safety 91
safety precautions 91
salinity 130
salinity measurement 102
sockets 84
storing 117
T
TDS 130
TDS (total dissolved solids) 103
temperature compensation 113
linear 115
non-linear 114
setting 113
switch off 116
temperature probe 99
temperature unit 135
time
setting 95
time, setting 136
total dissolved solids measurement 103
transmit data 128
W
What to do if... 143
152
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