Xylem Cond 1970i User Manual

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Cond 1970i

ON / OFF

CAL

AUTO READ

RUN / ENTER

RCL

STO

Cond 1970i

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2 5 0

Operating manual

ba75692e01 01/2007

Portable conductivity measuring instrument

Cond 1970i

Accuracy when

going to press

The use of advanced technology and the high quality standard of our instruments are the result of a 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.

Reproduction in whole - or even in part - is prohibited without the express written permission of WTW GmbH, Weilheim. Printed in Germany.

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Cond 1970i Contents

Cond 1970i - Contents

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.3 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 10

3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.4 Sensor quiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.1 Switching on the measuring instrument . . . . . . . . . . . . . 15

4.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.2.1 General information . . . . . . . . . . . . . . . . . . . . . . 16

4.2.2 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.2.3 Salinity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.2.4 TDS (Total dissolved solids) . . . . . . . . . . . . . . . 19

4.2.5 AutoRead AR (drift control) and hold function . . 20

4.3 Determining/setting up the cell constant [C] . . . . . . . . . . 21

4.3.1 Determining the cell constant (calibrating) . . . . 23

4.3.2 Setting the cell constant manually . . . . . . . . . . . 25

4.4 Setting the temperature compensation TC . . . . . . . . . . 28

4.4.1 Selecting the nonlinear temperature compensation 29

4.4.2 Selecting the linear temperature compensation 30

4.4.3 Switching the temperature compensation off . . 31

4.5 Saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.5.1 Saving manually . . . . . . . . . . . . . . . . . . . . . . . . 32

4.5.2 Saving automatically . . . . . . . . . . . . . . . . . . . . . 34

4.5.3 Outputting the data storage . . . . . . . . . . . . . . . . 36

4.5.4 Clearing the memory . . . . . . . . . . . . . . . . . . . . . 40

4.6 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.6.1 Data transmission interval (Int 2) . . . . . . . . . . . 41

4.6.2 Recorder (analog output) . . . . . . . . . . . . . . . . . 43

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Contents Cond 1970i

4.6.3 PC/external printer (RS232 interface) . . . . . . . . 45

4.6.4 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.7 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.8 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 51

5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7.2 Measuring ranges, resolutions, accuracies . . . . . . . . . . 58

8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

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Cond 1970i Overview

RUN / ENTER

1Overview

The portable Cond 1970i measuring instrument enables you to carry out conductivity measurements rapidly and reliably. The Cond 1970i provides the maximum degree of operating comfort, reliability and measuring certainty for all applications.

The proven procedures to determine or set up the cell constant support you in your work with the measuring instrument. The special AutoRead function enables precise measurements.

ON / OFF

AUTO READ

RUN / ENTER

1 Keypad

CAL

RCL

STO

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2 5 0

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2 Display

3 Integrated, exchangeable sensor quiver

4 Socket field

5 Carrying and positioning handle

Overview Cond 1970i

Note

If you need further information or application notes, you can obtain the following material from WTW:

z Application reports

z Primers

z Safety datasheets.

You will find information on available literature in the WTW catalog or via the Internet.

1.1 Display

Status display indicator

Sal

Time

Day.Month

Year

LoBat nLF

Baud

No.

Ident

8 8 8 8

Tref25 Tref20

Oxi

Lin

TEC

ARng

Auto

Store

Cal

mg/l

pH/mV

Sal

REL2REL1

RCL

Sensor symbol

Measured value display

Function and Temperature display

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Cond 1970i Overview

RCL

STO

1.2 Keypad

Key functions

ON / OFF

CAL

AUTO READ

RUN / ENTER

– Determine or set up the cell constant

Switch measuring instrument on/off

Select the measuring mode <M>: – Conductivity

– Salinity

– Total dissolved solids (TDS)

– Select temperature compensation

<CAL>

Activate/deactivate the AutoRead function

Confirm entries, start AutoRead, output measured values

Select the measuring mode, increase values, scroll

<▲ >

RCL

STO

Select the measuring mode, decrease values, scroll

<▼ >

Display/transmit measured values

<RCL>

Save a measured value

<STO>

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Overview Cond 1970i

1.3 Socket field

Sensors You can use the following sensors with the Cond 1970i:

z Conductivity depth armature

z Conductivity measuring cell

z Option: External temperature sensor

Connectors

Sensor / Instrument Socket

Conductivity measuring cell or depth armature 1

Temperature sensor, external 2 and 3

Printer or PC (serial interface, RS232) 4

Plug-in power supply unit 5

Watertight valve for internal pressure equalization 6

Warning

Only connect conductivity measuring cells to the measuring instrument that cannot return any voltages or currents that are not allowed (> SELV and > current circuit with current limiting). Nearly all measuring cells - especially WTW measuring cells - fulfill these conditions.

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Cond 1970i Safety

2 Safety

This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the conductivity measuring instrument. Consequently, all responsible personnel must read this operating manual before working with the measuring system. The operating manual must always be available within the vicinity of the measuring system.

Target group The measuring instrument was developed for work in the field and in

the laboratory. 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

Further notes

The individual chapters of this operating manual use safety instructions such as the label shown below to indicate various hazards or dangers:

Warning

indicates instructions that must be followed precisely in order to avoid the possibility of slight injuries or damage to the instrument or the environment.

Note

indicates notes that draw your attention to special features.

Note

indicates cross-references to other documents, e.g. operating manuals.

2.1 Authorized use

The authorized use of the measuring instrument consists exclusively of the measurement of conductivity, salinity, temperature and TDS (total dissolved solids) in the field and laboratory. The technical specifications as given in chapter 7 T 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 to be unauthorized.

ECHNICAL DATA must

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Safety Cond 1970i

2.2 General safety instructions

This instrument is built and inspected according to the relevant guidelines and norms for electronic measuring instruments (see chapter 7T

ECHNICAL DATA).

It left the factory in a safe and secure technical condition.

Function and operating

safety

Safe operation If safe operation is no longer possible, the instrument must be taken out

The smooth functioning and operational safety of the measuring instrument 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 measuring instrument can only be guaranteed under the environmental conditions that are specified in chapter 7 T

ECHNICAL 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.

of service and secured against inadvertent operation! Safe operation is no longer possible if the measuring instrument:

z has been damaged in transport

z has been stored under adverse conditions for a lengthy period of

time

Obligations

of the purchaser

z is visibly damaged

z no longer operates as described in this manual.

If you are in any doubt, please contact the supplier of the instrument.

The purchaser of the measuring instrument must ensure that the following laws and guidelines are observed when using dangerous substances:

z EEC directives for protective labor legislation

z National protective labor legislation

z Safety regulations

z Safety datasheets of the chemical manufacturers.

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Cond 1970i Commissioning

3 Commissioning

3.1 Scope of delivery

z Portable measuring instrument, Cond 1970i with integrated re-

chargeable battery

z Carrying and positioning handle

z Carrying strap

z Sensor quiver

z Plug-in power supply unit

z Operating manual

3.2 Power supply

Mains operation and

charging the battery

Charging time of the

battery

You can either operate the measuring instrument with the integrated rechargeable battery or with the plug-in power supply. The plug-in power supply supplies the measuring instrument with low voltage (12 V DC). At the same time, the rechargeable battery is charged.

approx. 16 hours. The battery is charged even when the instrument is switched off. The LoBat display indicator appears when the battery is nearly empty and has to be charged as soon as possible.

Warning

The line voltage at the operating site must lie within the input voltage range of the original plug-in power supply (see chapter 7 T

TA).

ECHNICAL DA-

Warning

Use original plug-in power supplies only (see chapter 7 T

ECHNICAL DATA).

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Commissioning Cond 1970i

Connecting the plug-in

power supply unit

Setting the date and

time

1 Connect the plug (1) to the socket (2) of the measuring instru-

ment.

2 Connect the original WTW plug-in power supply (3) to an easily

accessible mains socket.

3.3 Initial commissioning

Perform the following activities:

z For mains operation and charging the battery: Connect the plug-in

power supply (see section 3.2 P

z Set the date and time.

1 Press the <M> key and hold it down.

2 Press the <ON/OFF> key.

The display test appears briefly on the display.

3 Press the <RUN/ENTER> key repeatedly until the date flashes

on the display (Day.Month display indicator).

OWER SUPPLY).

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Cond 1970i Commissioning

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

No.

Ident

0 9 0 4

Tref25

Tref20

nLF

Lin

5t2

Auto

Store

Cal

Oxi

TEC

ARng

4 Set the date of the current day with <▲> <▼>.

5 Confirm with <RUN/ENTER>.

The date (month) flashes in the display.

6 Set the current month with <▲> <▼>.

7 Confirm with <RUN/ENTER>.

The year appears on the display.

8 Set the current year with <▲> <▼>.

9 Confirm with <RUN/ENTER>.

The hours flash on the display.

10 Set the current time with <▲> <▼>.

11 Confirm with <RUN/ENTER>.

The minutes flash on the display.

12 Set the current time with <▲> <▼>.

13 Confirm with <RUN/ENTER>.

The instrument switches to the measuring mode.

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Commissioning Cond 1970i

3.4 Sensor quiver

To store the sensors during field operation and to keep the sensor element moist, the quiver tip contains a sponge rubber insert that can be moistened with deionized water.

Note

For further details on proper storage, refer to the operating manual of the sensor.

Moistening the

quiver insert

1 Press the quiver out of the holder from the back side of the in-

strument and pull it out completely.

2 Pull off the quiver tip and moisten the sponge rubber with

deionized water.

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Cond 1970i Operation

4 Operation

4.1 Switching on the measuring instrument

1 Connect a conductivity measuring cell to the measuring instru-

ment.

2 Press the <ON/OFF> key.

The display test appears briefly on the display. Subsequently, the selected cell constant and the temperature compensation that was set up appear for approx. one second one after the other. The measuring instrument then automatically switches to the measuring mode that was last selected.

Note

The measuring instrument has an energy saving feature to avoid unnecessary battery depletion. The energy saving feature switches the measuring instrument off if no key has been pressed for an hour. The energy saving feature is not active when the AutoStore function is active.

The energy saving feature is also not active

z if the power is supplied by the plug-in power supply,

z if the communication cable and a PC with a running communication

program are connected,

z if the recorder cable is connected,

z if the printer cable is connected (for external printers).

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Operation Cond 1970i

4.2 Measuring

4.2.1 General information

You can measure the following variables:

z Conductivity

z Salinity

z Total dissolved solids (TDS)

The measuring instrument is supplied with the following functions:

z AutoRange (automatic switchover of the measurement range). If a

measuring range is exceeded, AutoRange causes the measuring instrument to change automatically to the next higher measuring range and back again. Therefore, the instrument always measures in the measuring range with the highest possible resolution. The function can be switched off.

z The AutoRead function (drift control) for checking the stability of the

measurement signal. This ensures the reproducibility of the measuring signal. For details of how to switch the AutoRead function on/off, see page 20.

Preparatory activities Perform the following preparatory activities when you want to measure:

1 Connect a conductivity measuring cell to the measuring instru-

ment.

2 Calibrate or check the measuring instrument with the measur-

ing cell. How to calibrate is described in section 4.3.

3 Select the measuring mode with <M>.

Warning

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

compensation and

reference temperature

Tref

The calculation of the temperature compensation is based on the preset reference temperature, 20 °C or 25 °C. For more detailed information concerning the temperature compensation, see section 4.4 on page 28.

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Cond 1970i Operation

Measuring the

temperature

For the temperature compensation, it is required to measure the temperature of the test sample. You have the following possibilities of measuring the temperature:

z The temperature sensor integrated in the sensor measures the tem-

perature automatically (example: TetraCon 325).

z Automatic temperature measurement by the external temperature

sensor (accessory) NTC30 or Pt 1000. This method is required when using conductivity measuring cells without integrated temperature sensor. Connection of the temperature sensor, see section 1.3 S

OCKET FIELD.

z You measure and enter the temperature manually.

Note

The instrument automatically recognizes the type of the used temperature sensor (NTC30 or Pt1000). The temperature sensor is shown on the display by TP.

If you use a conductivity measuring cell electrode without a temperature sensor, proceed as follows:

1 Measure the current temperature of the test sample using a

thermometer.

2 Enter the temperature on the instrument: Set the temperature

value of the test sample using <▲ > <▼>.

Note

When determining the cell constant without a temperature sensor, also set the current temperature of the control standard manually using the <▲ > <▼> keys.

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Operation Cond 1970i

4.2.2 Conductivity

You can carry out the conductivity measurements as follows:

1 Perform the preparatory activities according to section 4.2.1.

2 Immerse the conductivity measuring cell in the test sample.

3 Press the <M> key until appears in the status display. De-

pending on the setting, one of the following display indicators appears on the display:

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

05 3

No.

2 4 0

Tref20

Auto

Store

Cal

Oxi

Lin

TEC

ARng

4 Wait for a stable measured value.

4.2.3 Salinity

You can carry out the salinity measurements as follows:

1 Perform the preparatory activities according to section 4.2.1.

2 Immerse the conductivity measuring cell in the test sample.

3 Press the <M> key repeatedly until the Sal status display ap-

pears. The salinity value appears on the display.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

332

No.

2 1 2

Tref20

Auto

Store

TEC

ARng

Cal

Oxi

Lin

4 Wait for a stable measured value.

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Cond 1970i Operation

4.2.4 TDS (Total dissolved solids)

You can measure the total dissolved solids as follows:

1 Perform the preparatory activities according to section 4.2.1.

2 Immerse the conductivity measuring cell in the test sample.

3 Press the <M> key until the unit mg/l appears.

The value of the total dissolved solids appears in the upper display line. The TDS factor appears in the lower display line.

mg/l

REL1

pH/mV

REL2

Sal

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

447

No.

1 0 0

Tref20

Auto

Store

TEC

ARng

Cal

Oxi

Lin

4 Using <▲> <▼>, set the TDS factor (0.40 ... 1.00).

(The TDS factor has to be determined by a comparative measurement before.)

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

839

No.

0 8 2

Tref20

Auto

Store

TEC

ARng

Cal

Oxi

Lin

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5 Wait for a stable measured value.

Operation Cond 1970i

4.2.5 AutoRead AR (drift control) and hold function

The AutoRead function (drift control) checks the stability of the measurement signal. The stability has a considerable impact on the reproducibility of the measured values. With the aid of the hold function the measured value display is frozen.

Use the AutoRead function and hold function like this:

1 Select the required measuring mode with <M>.

2 Activate the AutoRead function with <AR>.

The current measured value is frozen (hold function).

3 Start AutoRead with <RUN/ENTER>.

AR flashes until a stable measured value is reached.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

05 3

No.

2 5 0

Tref20

Auto

Store

Cal

Oxi

Lin

TEC

ARngTPAR

4 If necessary, start the next AutoRead measurement with

<RUN/ENTER>.

5 To terminate AutoRead: Press the <AR> key.

Note

The current AutoRead measurement can be terminated at any time (accepting the current value) by pressing <RUN/ENTER>.

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Cond 1970i Operation

4.3 Determining/setting up the cell constant [C]

Why determine/set up

the cell constant?

Procedure The cell constant is determined in the control standard, 0.01 mol/l KCl.

Aging slightly changes the characteristics of the cell, e. g. by coatings. As a result, an inexact measured value is displayed. The original characteristics of the cell can often be restored by cleaning the cell. Calibration determines the current cell constant and stores it in the instrument. Thus, you should calibrate at regular intervals (we recommend: every 6 months).

You can determine the actual cell constant of the conductivity measuring cell by calibrating with the control standard in the following ranges:

z 0.450 ... 0.500 cm

-1

(e.g. TetraCon, nominal cell constant 0.475)

z 0.800 ... 1.200 cm

-1

(cells with a cell constant of approx. 1)

Besides, you can set the cell constant manually in the following ranges:

z 0.090 ... 0.110 cm

z 0.250 ... 2.500 cm

-1

The fixed cell constant, 0.010 cm-1 can also be selected. It is not necessary to calibrate or adjust it.

Cell constants outside the above mentioned ranges cannot be calibrated.

Calibration interval The interval for the determination of the cell constant (Int 3) is set to 180

days in the factory. You can select the interval in the range of 1 ... 999 days.

AutoRead The calibration procedure automatically activates the AutoRead func-

tion.

Displaying the

adjusted

cell constant

Each time the instrument is switched on, the adjusted cell constant and temperature compensation are shown on the display for a short time (see section 4.1 S

WITCHING ON THE MEASURING INSTRUMENT). In order to

view the data, switch the measuring instrument off and switch it on again.

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Operation Cond 1970i

Printing the

calibration protocol

The calibration protocol contains the calibration data of the current calibration. You can transmit the calibration protocol to a printer via the serial interface (see page 39).

Note

You can automatically print a calibration protocol after the calibration. To do so, connect a printer to the interface according to section 4.6.3 before calibrating. After a valid calibration, the record is printed.

Sample printout:

CALIBRATION PROTOCOL

14.04.02 11:37 Device No.: 99990000 Calibration Conductivity Cal time: 14.04.02 / 11:37 Cal interval: 180d Cal Std.: 0.01 mol/l KCL

40.0 °C Conduct./Tref25: 1413µS/cm Cell Const : 0.478 1/cm Probe : +++

Calibration evaluation After the calibration, the measuring instrument automatically evaluates

the current status of the calibration. The evaluation appears on the display.

Display Cell constant [cm-1]

-1

Eliminate the error according to chapter 6 W

HAT TO DO IF...

0.450 ... 0.500 cm

0.800 ... 1.200 cm

outside the ranges

0.450 ... 0.500 cm or

0.800 ... 1.200 cm

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Cond 1970i Operation

4.3.1 Determining the cell constant (calibrating)

Note

This method of automatically determining the cell constant by calibration with the 0.01 mol/l KCL standard solution can only be used for measuring cells with cell constants in the range 0.450 ... 0.500 cm

0.800 ... 1.200 cm

-1

This is how you can determine the cell constant:

1 Press the <CAL> key until CELL appears on the display.

/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat nLF

CT1

Baud

No.

Ident

Tref25 Tref20

E L LC

Auto

Lin

Oxi

Cal

Store

TEC

ARng

2 Press the <RUN/ENTER> key.

3 Press the <CAL> repeatedly, until the calibrated cell constant

appears on the display: CAL appears on the display.

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

No.

4 7 5

Tref20

Auto

Store

Oxi

Lin

Cal

TEC

ARng

4 The displayed value is the current calibrated cell constant. You

can:

– accept this setting for measuring with <M> or

– continue with step 5 and start a new calibration.

5 Immerse the measuring cell in the control standard solution,

0.01 mol/KCl.

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Operation Cond 1970i

6 Press the <RUN/ENTER> key.

– If no temperature sensor is connected, enter the current

temperature of the solution with <▲> <▼> and confirm with <RUN/ENTER>.

– If a temperature sensor is connected, the AR measurement

to determine the cell constant starts.

The AR display indicator flashes until a stable signal is reached. The cell constant determined is displayed. The measuring instrument automatically stores the cell constant.

Sal

Time Baud

Year

Ident

Tref25

nLF

No.

4 7 3

Tref20

Auto

Store

Oxi

Lin

Cal

Day.Month

LoBat

Note

If the error message

pH/mV

mg/l

Sal

REL1

REL2

RCL

appears, refer to chapter 6 W

TEC

LCA

E3E3

ARng

HAT TO DO IF...

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Cond 1970i Operation

4.3.2 Setting the cell constant manually

Note

The cell constant to be set must either be taken from the operating manual of the measuring cell or is printed on the measuring cell.

You can set the cell constant manually as follows:

Setting the fixed cell

constant

0.010 cm

You can set the fixed value 0.010 cm-1 for the cell constant as follows:

-1

1 Press the <CAL> key repeatedly until CELL appears on the

display.

/mV

mg/l

REL1

REL2

Sal

RCL

Sal

Time

Day.Month

Year

LoBat nLF

CT1

Baud

No.

Ident

Tref25 Tref20

E L LC

Auto

Lin

Oxi

Cal

Store

TEC

ARng

2 Press the <RUN/ENTER> key.

3 Press the <CAL> key repeatedly until the cell constant

-1

appears on the display.

pH/mV

mg/l

ARng

REL1

Sal

REL2

RCL

592

0 1 0

Auto

Store

Cal

TEC

Sal

Time Baud

Day.Month

Year

LoBat

0.010 cm

No.

Ident

Tref20

Tref25

Oxi

Lin

nLF

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4 To return to the measuring mode: Press the <M> key.

From now on, the cell constant 0.010 cm

-1

will be used.

Operation Cond 1970i

Range

0.090 ... 0.110 cm

-1

1 Press the <CAL> key repeatedly until CELL appears on the

display.

/mV

mg/l

REL1

REL2

Sal

RCL

Sal

Time

Day.Month

Year

LoBat nLF

CT1

Baud

No.

Ident

Tref25 Tref20

E L LC

Lin

Oxi

Auto

Cal

Store

TEC

ARng

2 Press the <RUN/ENTER> key.

3 Press the <CAL> key repeatedly until a cell constant in the

-1

range 0.090 ... 0.110 cm

Sal

Time Baud

No.

Day.Month

Year

LoBat

Ident

Tref25

nLF

Lin

Tref20

Oxi

1 0 0

Auto

Cal

Store

TEC

592

ARng

appears on the display.

pH/mV

mg/l

Sal

REL1

REL2

RCL

4 Set the cell constant to be used with <▲> <▼>,

Auto

Cal

Store

TEC

-1

pH/mV

mg/l

ARng

REL1

REL2

Sal

RCL

592

e.g. 0.105 cm

Sal

Time Baud

Day.Month

Year

Ident

Tref25

LoBat

nLF

No.

1 0 5

Tref20

Oxi

Lin

5 To return to the measuring mode: Press the <M> key.

From now on, the new cell constant will be used.

ba75692e01 01/2007

Cond 1970i Operation

Range

0.250 ... 2.500 cm

-1

1 Press the <CAL> key repeatedly until CELL appears on the

display.

/mV

mg/l

REL1

REL2

Sal

RCL

Sal

Time

Day.Month

Year

LoBat nLF

CT1

Baud

No.

Ident

Tref25 Tref20

E L LC

Auto

Lin

Oxi

Cal

Store

TEC

ARng

2 Press the <RUN/ENTER> key.

3 Press the <CAL> repeatedly until until a cell constant in the

-1

mg/l

REL1

appears.

pH/mV

Sal

REL2

RCL

range 0.250 ... 2.500 cm

Sal

Time Baud

Year

Ident

Tref25

nLF

No.

2 7 8

Tref20

Auto

Cal

Oxi

Lin

Day.Month

LoBat

Store

TEC

842

ARng

4 Set the cell constant to be used with <▲> <▼>,

-1

Store

TEC

pH/mV

mg/l

ARng

REL1

Sal

REL2

RCL

068

e.g. 0.614 cm

Sal

Time Baud

Day.Month

Year

Ident

Tref25

LoBat

nLF

No.

6 1 4

Tref20

Auto

Cal

Oxi

Lin

5 To return to the measuring mode: Press the <M> key.

From now on, the new cell constant will be used.

ba75692e01 01/2007

Operation Cond 1970i

4.4 Setting the temperature compensation TC

The calculation of the temperature compensation is based on the preset reference temperature, 20 °C or 25 °C. It appears on the display as Tref20 or Tref25. To switch over the reference temperature, see section 4.7 C

You can select one of the following temperature compensation methods:

z Nonlinear temperature compensation (nLF)

according to EN 27 888

z Linear temperature compensation (Lin)

with selectable coefficients of 0.001 ... 3.000 %

z No temperature compensation (- - - -)

ONFIGURATION.

Adjusted

temperature

compensation

ips Select the following temperature compensations given in the table ac-

Application tips

Each time the instrument is switched on, the adjusted cell constant and temperature compensation are shown on the display for a short time (see section 4.1 S

WITCHING ON THE MEASURING INSTRUMENT). In order to

view the data, switch the measuring instrument off and switch it on again.

Note

cording to the respective test sample:

Sample Temperature compensation Display

indicator

Natural water (ground water, surface water and drinking water)

Ultrapure water nLF

nLF according to DIN 38404 EN 27 888

nLF

according to DIN 38404 EN 27 888

4.4.1 Selecting the nonlinear temperature compensation

You can select the nonlinear temperature compensation as follows:

1 Press the <CAL> key repeatedly until tc appears on the dis-

play.

/mV

mg/l

REL1

REL2

Sal

RCL

Sal

Time

Day.Month

Year

LoBat nLF

CT1

Baud

No.

Ident

Tref25 Tref20

Auto

Lin

Oxi

Cal

t c

Store

TEC

ARng

2 Press the <RUN/ENTER> key.

3 Press the <CAL> key repeatedly until nLF appears on the dis-

play.

mg/l

REL1

pH/mV

REL2

Sal

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

46 8

No.

n L F

Tref20

Auto

Store

Cal

Oxi

Lin

TEC

ARng

4 To return to the measuring mode: Press the <M> key. From

now on, nLF will be used for the temperature compensation.

ba75692e01 01/2007

Operation Cond 1970i

4.4.2 Selecting the linear temperature compensation

You can select the linear temperature compensation as follows:

1 Press the <CAL> key repeatedly until tc appears on the dis-

play.

/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat nLF

CT1

Baud

No.

Ident

Tref25 Tref20

Auto

Lin

Oxi

Cal

t c

Store

TEC

ARng

2 Press the <RUN/ENTER> key.

3 Press the <CAL> key repeatedly until the adjustable linear

temperature coefficient appears on the display.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

No.

2 0

Lin

Tref20

42 2

0 0

Auto

Store

Cal

Oxi

TEC

ARng

4 Set the temperature coefficient with <▲> <▼>, e.g. 1.880 %/K.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

No.

1 8

Lin

Tref20

42 2

8 0

Auto

Store

Cal

Oxi

TEC

ARng

5 To return to the measuring mode: Press the <M> key. From

now on, the adjusted linear temperature coefficient will be used for the temperature compensation.

ba75692e01 01/2007

Cond 1970i Operation

4.4.3 Switching the temperature compensation off

You can switch off the temperature compensation as follows:

1 Press the <CAL> key repeatedly until tc appears on the dis-

play.

/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat nLF

CT1

Baud

No.

Ident

Tref25 Tref20

Auto

Lin

Oxi

Cal

t c

Store

TEC

ARng

2 Press the <RUN/ENTER> key.

3 Press the <CAL> key repeatedly until the following display ap-

pears.

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

No.

Lin

- -

Tref20

Oxi

Auto

Cal

42 2

- -

Store

TEC

ARng

4 The temperature compensation is switched off.

5 To return to the measuring mode: Press the <M> key. From

now on, the instrument will measure without temperature compensation.

ba75692e01 01/2007

Operation Cond 1970i

4.5 Saving

The measuring instrument has an internal data memory. It can store up to 500 datasets. A complete data record consists of:

z Storage location

z Date/time

z Measured value

z Temperature

z Temperature measuring procedure

z ID number

You can transmit measured values (data records) to the data storage in two ways:

z Save manually

z Switch on AutoStore (Int 1).

4.5.1 Saving manually

You can transmit a measured value to the data storage as follows:

1 Press the <STO> key.

The current number (location number No.) of the next free storage location appears under the current measured value on the display.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

35 5

No.

2 4

Lin

Tref20

Auto

Cal

Oxi

Store

TEC

ARng

2 Confirm with <RUN/ENTER>.

The display switches to entering the ID number.

ba75692e01 01/2007

Cond 1970i Operation

Message StoFull

StoFull This message appears when all of the 500 storage locations are occu-

StoFullStoFull

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

35 5

No.

2 4

Lin

Tref20

Auto

Cal

Oxi

Store

TEC

ARng

3 Using <▲> <▼>, enter the required ID number

(1 ... 999).

4 Confirm with <RUN/ENTER>.

The instrument changes to the measuring mode.

pied.

You have the following options:

Saving the current measured value. The oldest measured value (storage location 1) will be overwritten by this

Press

Returning to the measuring mode without

press any key

saving

Outputting the data storage see

section 4.5.3

Clearing the memory see

section 4.5.4

ba75692e01 01/2007

Operation Cond 1970i

4.5.2 Saving automatically

The save interval (Int 1) determines the chronological interval between automatic save processes. After the fixed interval has expired, the current data record is transmitted to the storage and to the interface.

The default setting for the save interval (Int 1) is OFF.

Setting the

save interval:

By this, the AutoStore function is switched off. To switch the function on, set an interval (5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min):

1 Press the <RUN/ENTER> key and hold it down.

2 Press the <STO> key. Int 1 appears on the display.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

Ident

Tref25

nLF

1nt

No.

Lin

Tref20

Auto

Cal

Oxi

Store

ARng

TEC

3 Set the required interval between the saving procedures with

<▲> <▼>.

4 Confirm with <RUN/ENTER>.

The number of free memory locations appears on the display.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

Ident

Tref25

nLF

949

No.

Store

Auto

Cal

Oxi

TEC

ARng

Lin

Tref20

5 As soon as all of the 500 storage locations are occupied,

AutoStore is terminated (Int 1 = OFF). If there are not enough storage locations available for your measurements:

– Output and backup the data storage (see page 36) and

– clear the memory (see page 40).

ba75692e01 01/2007

Cond 1970i Operation

6 Confirm with <RUN/ENTER>.

The prompt for the ID number appears on the display.

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

Ident

Tref25

nLF

949

No.

ERF

Store

TEC

ARng

Lin

Tref20

Auto

Cal

Oxi

7 Set the required ID number with <▲> <▼>.

8 Confirm with <RUN/ENTER>.

The instrument switches to the measuring mode and starts the measuring and saving process. AutoStore flashes on the display.

Note

The AutoStore function is interrupted if you start other functions, e.g. output the data storage. After the function is finished, the AutoStore function is continued. By this, however, temporal gaps in the recording of the measured values will occur.

Switching off AutoStore Switch AutoStore off by:

z setting the save interval (Int 1) to OFF, or

z switching the measuring instrument off and then on again.

ba75692e01 01/2007

Operation Cond 1970i

4.5.3 Outputting the data storage

You can output the contents of the data storage:

z Stored data on the display

z Calibration data on the display

z Stored data on the serial interface

z Calibration protocol on the interface

Outputting stored data

on the display

1 Press the <RCL> key repeatedly until StO dISP appears on the

display.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

Ident

Tref25

nLF

oST

No.

SID

Store

Auto

Tref20

Cal

Oxi

Lin

TEC

ARng

2 Press the <RUN/ENTER> key.

A measured value appears on the display. The storage location of the data record is displayed for approx. 2 s, then the respective temperature appears.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

Ident

Tref25

nLF

35 5

No.

2 5 0

Auto

Cal

Store

TEC

ARng

Lin

Tref20

Oxi

You can perform the following activities:

Display further elements of the data record (ID number, date, time, storage location)

Press

Advance one data record (storage location) Press <▲>

Go back one data record (storage location) Press <▼>

ba75692e01 01/2007

Cond 1970i Operation

Note

If you want to search for a certain element (e.g. date), proceed as follows:

1 Using <RUN/ENTER>, select the element (e.g. date).

2 Press <▲> or <▼> repeatedly until the required date appears

on the display. After approx. 2 s the temperature of the displayed measured value appears.

Outputting stored data

to the interface

1 Press the <RCL> key repeatedly until Sto SEr appears on the

display.

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

Ident

Tref25

nLF

oST

No.

Lin

Tref20

Store

Auto

Cal

Oxi

TEC

ARng

2 Press the <RUN/ENTER> key.

The complete storage content is transmitted to the interface; during the data transmission the numbers of the currently transmitted storage locations run through. After the data transmission, the measuring instrument automatically switches to the measuring mode.

Note

You can cancel the transmission with <M> or <RUN/ENTER>.

ba75692e01 01/2007

After the instrument number, the printout contains the complete storage contents in ascending order of the storage location numbers.

Operation Cond 1970i

Sample printout:

Device No.: 99990000

No. 1:

01.01.02 00:04

2.40 mS/cm 25 °C Tman nLF Tref25 C = 0.475 1/cm Ident : 1

No. 2:

10.01.02 10:09

2.40 mS/cm 25.3 °C Tauto nLF Tref25 C = 0.475 1/cm Ident : 1

No. 3:

12.01.02 01:48

2.40 mS/cm 21.6 °C Tauto nLF Tref25 C = 0.475 1/cm Ident : 1 ...

Outputting the

calibration data

on the display

1 Press the <RCL> key repeatedly until CAL dISP appears on

the display.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

No.

Ident

Tref25 Tref20

Oxi

Lin

nLF

I S P

Auto

Store

TEC

ARng

Cal

2 Press the <RUN/ENTER> key.

The cell constant appears on the display, but the CAL display only appears when the displayed value was determined by calibrating the measuring cell.

ba75692e01 01/2007

Cond 1970i Operation

Outputting the

calibration protocol

on the interface

mg/l

REL1

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

3 Using <M> or <RUN/ENTER>, you can switch back to the

1 Press the <RCL> key repeatedly until CAL SEr appears on the

Lin

Tref20

Oxi

4 7 5

Auto

Store

TEC

Cal

No.

Ident

Tref25

nLF

measuring mode.

display.

ARng

Sal

Time Baud

Day.Month

Year

LoBat

No.

Ident

Tref25 Tref20

Lin

nLF

S E R

Oxi

Auto

Store

TEC

ARng

Cal

2 Press the <RUN/ENTER> key.

The calibration protocol is transmitted to the interface. After the data transmission, the measuring instrument automatically switches to the measuring mode.

Note

You will find a sample calibration protocol in P

PROTOCOL, page 22.

RINTING THE CALIBRATION

ba75692e01 01/2007

Operation Cond 1970i

4.5.4 Clearing the memory

With this function, you can delete the stored data records. 500 storage locations will then be available again.

Note

The Clear memory function only appears when there are data records stored in the memory. Otherwise, the measuring instrument automatically switches to the measuring mode.

Proceed as follows to clear all data records:

1 Switch off the measuring instrument.

2 Press the <STO> key and hold it down.

3 Press the <ON/OFF> key.

The display test appears briefly on the display. Subsequently, Sto CLr appears.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

4 Confirm the clearing process with <RUN/ENTER>.

Note

The calibration data remain stored and can be called up.

Lin

Oxi

C L R

Auto

Store

TEC

ARng

Cal

No.

Ident

Tref25 Tref20

nLF

Pressing any other key prevents the clearing, the data records will remain stored.

ba75692e01 01/2007

Cond 1970i Operation

4.6 Transmitting data

You have the following possibilities of transmitting data:

z One of the following options:

– With the AutoStore function (page 34), measured values are

periodically saved internally (save interval Int 1) and output on the interface.

– With the Data transmission interval function (Int 2), measured

values are periodically output on the interface (see below).

z With the Output data storage function (page 36), calibration data or

saved measured values are output on the interface.

z Via the analog recorder output (page 43), measured values are out-

put as voltage values.

z With the KOM pilot communication kit (accessory), data can be

transmitted bidirectionally (page 45).

Note

If you connect a recorder (analog output), the output on the digital interface is switched off.

4.6.1 Data transmission interval (Int 2)

The interval for the data transmission (Int 2) determines the chronological interval between automatic data transmissions. After the selected interval expires, the current data record is transmitted to the interface.

Note

When the AutoStore function is active, the data transmission is performed according to the setting of the save interval (Int 1). Set the save interval (Int 1) to OFF to activate the Data transmission interval (Int 2).

ba75692e01 01/2007

Operation Cond 1970i

Setting the

Data transmission

interval

The default setting for the interval is OFF. To start the data transmission, set an interval (5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min):

1 Press the <RUN/ENTER> key and hold it down.

2 Press the <RCL> key. Int 2 appears on the display.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time Baud

Day.Month

Year

LoBat

3 Set the required interval between the saving procedures with

4 Confirm with <RUN/ENTER>.

Lin

Oxi

O F F

Store

Auto

TEC

ARng

Cal

No.

Ident

Tref25 Tref20

nLF

<▲> <▼>.

The measuring instrument automatically switches to the measuring mode.

ba75692e01 01/2007

Cond 1970i Operation

4.6.2 Recorder (analog output)

You can transmit data to a recorder via the analog output. Connect the analog output to the recorder via the AK323 interface cable. The data output automatically switches to Recorder output.

Socket assignment

Signal range The signal range of the analog output depends on the measured vari-

Conductivity

1 free 2 Plug coding

RS 232

REC

3 Ground 4 Analog output

(internal resistance < 5 Ohm)

Note

The analog output is activated automatically in the cable by connecting 2 and 3.

The output on the analog output corresponds to the value shown on the display.

able and the measuring range:

Measuring range Voltage Resolution

0.000 ... 1.999 µS/cm 0 ... 1999 mV 1 mV

Salinity

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

ba75692e01 01/2007

Operation Cond 1970i

TDS

Measuring range Voltage Resolution

0 ... 1999 mg/l 0 ... 1999 mV 1 mV

ba75692e01 01/2007

Cond 1970i Operation

CTS

4.6.3 PC/external printer (RS232 interface)

Via the RS 232 interface, you can transmit the data to a PC or an external printer. Use the AK340/B (PC) or AK325/S (ext. printer) cable to connect the interface to the devices. The data output automatically switches to the RS232 interface.

Warning

The RS232 interface is not galvanically isolated. When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result.

Set up the following transmission data at the PC/printer:

Baud rate selectable between: 1200, 2400, 4800, 9600

Handshake RTS/CTS + Xon/Xoff

Socket assignment

Parity none

Data bits 8

Stop bits 1

1 2 RxD

RS 232

REC

4.6.4 Remote control

The measuring instrument can be remotely controlled from a PC. This requires the KOM pilot communication kit. It is available as an accessory. The instrument is then controlled via commands that simulate keystrokes and request the current display contents.

3 Ground 4TxD

ba75692e01 01/2007

Note

A more detailed description is provided within the scope of delivery of the communication kit.

Operation Cond 1970i

4.7 Configuration

You can adapt the measuring instrument to your individual requirements. To do this, the following parameters can be changed (the status on delivery is marked in bold):

Baud rate 1200, 2400, 4800, 9600

Calibration interval (Int 3) 1 ... 180 ... 999 d

AutoRange ARng On or off

Reference temperature – 25 °C (TREF25)

– 20 °C (TREF20)

Date/time Any

Note

You can leave the configuration menu at any time with <M> . The parameters that have already been changed are stored.

Baud rate

1 Switch off the measuring instrument.

2 Press the <M> key and hold it down.

3 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.

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

No.

Ident

Tref25 Tref20

Lin

nLF

8 0 04

Store

Auto

Oxi

Cal

TEC

ARng

4 Select the required baud rate with <▲> <▼>.

5 Confirm with <RUN/ENTER>. Int 3 appears on the display.

ba75692e01 01/2007

Cond 1970i Operation

Calibration interval

AutoRange automatic

selection of the

measurement range

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

Ident

Tref25

nLF

3nt

No.

Store

TEC

ARng

Lin

Tref20

Auto

Oxi

Cal

6 Set the required interval in days (d) with <▲> <▼>.

7 Confirm with <RUN/ENTER>. ARng appears on the display.

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

Ident

Tref25

nLF

nAR

No.

Lin

Tref20

Auto

Cal

Oxi

Store

TEC

ARng

Switching over the

reference temperature

8 Using <▲> <▼>, switch between no and YES.

YES: Switch on AutoRange. no: Switch off AutoRange.

9 Confirm with <RUN/ENTER>. The adjusted reference temper-

ature appears on the display.

mg/l

REL1

pH/mV

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

Ident

Tref25

nLF

5t2

No.

Store

TEC

SEy

ARng

Lin

Tref20

Auto

Cal

Oxi

10 Using <▲> <▼>, toggle between 25 °C (Tref25) and 20 °C

(Tref20).

11 Confirm with <RUN/ENTER>.

The date (day) flashes in the display.

ba75692e01 01/2007

Operation Cond 1970i

Date and time

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

No.

Ident

0 9 0 4

Tref25

Tref20

nLF

Lin

5t2

Auto

Store

Cal

Oxi

TEC

ARng

12 Set the date of the current day with <▲> <▼>.

13 Confirm with <RUN/ENTER>.

The date (month) flashes in the display.

14 Set the current month with <▲> <▼>.

15 Confirm with <RUN/ENTER>.

The year appears on the display.

16 Set the current year with <▲> <▼>.

17 Confirm with <RUN/ENTER>.

The hours flash on the display.

18 Set the current time with <▲> <▼>.

19 Confirm with <RUN/ENTER>.

The minutes flash on the display.

20 Set the current time with <▲> <▼>.

21 Confirm with <RUN/ENTER>.

The measuring instrument automatically switches to the measuring mode.

ba75692e01 01/2007

Cond 1970i Operation

4.8 Reset

You can reset (initialize) the measurement parameters and the configuration parameters separately from one another.

Measurement

parameters

Configuration

parameters

The following measured parameters ( InI) are reset to the default condition:

Measuring mode

Cell constant 0.475 cm

0.475 cm

-1

(calibrated)

-1

(set up)

Temperature compensation nLF

Reference temperature 25 °C (TREF25)

Temperature coefficient of the lin-

2.000 %/K

ear temperature compensation

TDS factor 1.00

Note

The calibration data gets lost when the measuring parameters are reset. Recalibrate after performing a reset.

The following configuration parameters (InI) are reset to the delivery status:

Baud rate 4800

Interval 1 (automatic saving) OFF

Interval 2 (for data transmission) OFF

ba75692e01 01/2007

Operation Cond 1970i

Resetting the

measuring parameters

Resetting the configura-

tion parameters

1 Press the <RUN/ENTER> key and hold it down.

2 Press the <CAL> key.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

Ident

Tref25

nLF

No.

0 9

Lin

Tref20

iin

n o

Auto

Store

Cal

Oxi

TEC

ARng

3 Using <▲> <▼>, switch between no and YES.

YES: Resetting the measuring parameters no: Retaining settings.

4 Confirm with <RUN/ENTER>.

The measuring instrument switches to the configuration parameters.

pH/mV

mg/l

REL1

Sal

REL2

RCL

Sal

Time

Day.Month

Year

LoBat

Baud

Ident

Tref25

nLF

No.

0 9

Lin

Tref20

iin

n o

Auto

Store

Cal

Oxi

TEC

ARng

5 Using <▲> <▼>, switch between no and YES.

YES: Resetting the configuration parameters no: Retaining settings.

6 Confirm with <RUN/ENTER>.

The measuring instrument automatically switches to the measuring mode.

ba75692e01 01/2007

Cond 1970i Maintenance, cleaning, disposal

5 Maintenance, cleaning, disposal

5.1 Maintenance

The measuring instrument is maintenance-free.

5.2 Cleaning

Occasionally wipe the outside of the measuring instrument with a damp, lint-free cloth. Disinfect the housing with isopropanol as required.

Warning

The housing components are made out of synthetic materials (polyurethane, ABS and PMMA). Thus, avoid contact with acetone and similar detergents that contain solvents. Remove any splashes immediately.

5.3 Disposal

Packing This measuring instrument is sent out in a protective transport packing.

We recommend: Keep the packing material. The original packing protects the measuring instrument from transport damages.

Rechargeable battery Remove the rechargeable battery from the instrument and dispose of it

at a suitable facility according to local legal requirements. It is illegal to dispose of the rechargeable battery with household refuse. Proceed as follows to disassemble the rechargeable battery:

Ni-Cd Cd

1 Remove the carrying and positioning handle or the carrying

strap.

ba75692e01 01/2007

2 Unscrew the fixing elements (1) using a hexagon key.

3 Remove the instrument from the enclosure by vigorously

pressing against the socket field.

4 Take out the rechargeable battery (2) and cut off the battery ca-

ble.

Maintenance, cleaning, disposal Cond 1970i

Measuring instrument, Dispose of the measuring instrument without the rechargeable battery

as electronic waste at an appropriate collection point.

ba75692e01 01/2007

Cond 1970i What to do if...

6 What to do if...

Display LoBat

Instrument does not

react to keystroke

Cause Remedy

– Battery almost empty – Charge the battery (see

section 3.2)

Cause Remedy

– Operating condition undefined

or EMC load unallowed

– Processor reset:

Press the <RCL> and <ON/OFF> keys at the same time and release them again. The software version is displayed.

Error message OFL

Error message E3

Display to

OFL

OFLOFL

E3E3

toto

Cause Remedy

The measured value lies outside the measuring range

– Measuring cell not connected – Connect measuring cell

– Cable broken – Replace measuring cell

Cause Remedy

– Measuring cell contaminated – Clean cell and

replace it if necessary

– Unsuitable calibration

– Check calibration solutions

solution

Cause Remedy

– Time-out of the interface – Check the instrument

connected

ba75692e01 01/2007

What to do if... Cond 1970i

Sensor symbol flashes

Cause Remedy

– Calibration interval expired – Recalibrate the measuring

system

Message StoFull

StoFull

StoFullStoFull

Cause Remedy

– All memory locations are full – Output data storage and clear

data storage

You want to know which

Cause Remedy

software version is in

the instrument

– E. g., a question by the WTW

service department

– Simultaneously press the

<CAL> and <ON/OFF> keys and release them again. The software version is displayed.

ba75692e01 01/2007

Cond 1970i Technical data

7 Technical data

7.1 General data

Test certificates cETLus, CE

Dimensions approx. 90 x 200 x 190 mm

Weight approx. 1.5 kg (without plug-in power supply)

Mechanical structure Type of protection: IP 67

Electrical safety Protective class: III

Ambient

conditions

Operation -10 °C ... + 55 °C

Storage - 25 °C ... + 65 °C

Climatic class 2

Power supply

Rechargeable battery Nickel-cadmium (NiCad)

rechargeable battery

Operational life approx. 600 hours with one charging

Plug-in power supply unit (charging device)

The following applies to all plug-in power supplies: Connection max. Overvoltage category II

Plug-in power supply unit (Euro, US , UK, Australian plug) FRIWO FW7555M/09, 15.1432 Friwo Part. No. 1883259 Input: 100 ... 240 V ~ / 50 ... 60 Hz / 400 mA Output: 9 V = / 1,5 A

ba75692e01 01/2007

Technical data Cond 1970i

Serial interface Automatic switchover when a PC or a printer is connected via the cable,

AK 340/B or AK 325/S.

Type RS232, data output

Baud rate Can be set to

1200, 2400, 4800, 9600 Baud

Data bits 8

Stop bits 2

Parity None

Handshake RTS/CTS + Xon/Xoff

Cable length Max. 15m

Analog output (AK 323/

S cable)

Guidelines

and norms used

Automatic switchover when the recorder is connected by the cable, AK 323/S.

pH output signal -200 ... +1999 mV for the range

- 2.00 ... + 19.99

mV output signal -1999 ... +1999 mV for the range

-1999 ... +1999 mV for the range

Accuracy ± 0.5 % of display value

Internal resistance < 5 Ohm (current limited to max. 0.2 mA

output current)

Output signal 0 ... 1.999 V for range

0 ... 1999 digits

Accuracy ± 0.5 % of display value

Internal resistance < 5 Ohm (current limited to max. 0.2 mA out-

put current)

EMC E.C. guideline 89/336/EEC

EN 61326-1:1997 EN 61000-3-2 A14:2000 EN 61000-3-3:1995 FCC Class A

Instrument safety E.C. guideline 73/23/EEC

EN 61010-1 A2:1995

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Cond 1970i Technical data

Climatic class VDI/VDE 3540

IP protection EN 60529:1991

ba75692e01 01/2007

Technical data Cond 1970i

7.2 Measuring ranges, resolutions, accuracies

Measuring ranges and

resolutions

Variable Measuring range Resolution

[µS/cm] 0.000 ... 1.999 *

0.00 ... 19.99 **

0.0 ... 199.9 0 ... 1999

[mS/cm] 0.00 ... 19.99

0.0 ... 199.9 0 ... 500

SAL 0.0 ... 70.0

0.001

0.01

0.1 1

0.01

0.1 1

0.1 according to the IOT table

TDS [mg/l] 0 ... 1999

1 Factor can be set between 0.40 ... 1.00

T [°C] − 5.0 ... + 105.0 0.1

* only possible with cells of the cell constant 0.010 cm ** only possible with cells of the cell constant 0.010 cm-1 or 0.100 cm

-1

Manual

temperature input

Cell constants

Reference temperature

Variable Range Increment

[°C] - 20 ... + 130 1

manual

Cell constant C Values

Can be calibrated in the ranges

0.450 ... 0.500 cm

0.800 ... 1.200 cm

-1

adjustable 0.010 cm-1 (fixed)

-1

Reference tempera-

0.090 ... 0.110 cm

0.250 ... 2.500 cm

Values

ture

adjustable 20 °C (TREF20)

25 °C (TREF25)

ba75692e01 01/2007

Cond 1970i Technical data

Accuracy

(± 1 digit)

Variable Accuracy at test sample

temperature

, temperature compensation (TC)

none ± 0.5 %

Nonlinear ± 0.5 % 0 °C ... + 35 °C

according to EN 27 888

± 0.5 % + 35 °C ... + 50 °C

Extended nLF function according to WTW measurements

Linear ± 0.5 % + 10 °C ... + 75 °C

SAL / Range

0.0 ... 42.0 ± 0.1 + 5 °C ... + 25 °C

± 0.2 + 25 °C ... + 30 °C

TDS [mg/l]

± 1

T [°C] / Temperature sensor

NTC 30 ± 0.1 0 °C ... + 55 °C

PT 1000 ± 0.5

± 0.1 ± 0.5

0 °C ... + 15 °C + 15 °C ... + 35 °C + 35 °C ... + 55 °C

ba75692e01 01/2007

Technical data Cond 1970i

ba75692e01 01/2007

Cond 1970i Lists

8Lists

This chapter provides additional information and orientation aids.

Abbreviations The list of abbreviations explains the indicators and the abbreviations

that appear on the display and in the manual.

Specialist terms The glossary briefly explains the meaning of the specialist terms. How-

ever, terms that should already be familiar to the target group are not described here.

Index The index helps you to find the topics that you are looking for.

Lists Cond 1970i

Abbreviations

Conductivity value (international γ)

AR AutoRead (drift control)

ARng Automatic range switching

Measuring instrument measures with highest resolution

-1

C Cell constant [cm

] (internat. k)

°C Temperature unit, degrees Celsius

Cal Calibration

InI Initialization

Resets individual basic functions to the status they had on delivery

Lin Linear temperature compensation

LoBat Battery almost empty (Low Battery)

nLF Nonlinear temperature compensation

OFL Display range exceeded (Overflow)

SELV Safety Extra Low Voltage

TC Temperature coefficient (internat. α)

TDS Total Dissolved Solids

TP Temperature measurement active (Temperature

Probe)

20/T20 Reference temperature of 20 °C

Ref

25/T25 Reference temperature of 25 °C

Ref

Cond 1970i Lists

Glossary

Adjusting To manipulate a measuring system so that the relevant value (e. g. the

displayed value) differs as little as possible from the correct value or a value that is regarded as correct, or that the difference remains within the tolerance.

AutoRange Name of the automatic selection of the measuring range.

AutoRead WTW name for a function to check the stability of the measured value.

Calibration Comparing the value from a measuring system (e. g. the displayed

value) to the correct value or a value that is regarded as correct. Often, this expression is also used when the measuring system is adjusted at the same time (see adjusting).

Cell constant, k Characteristic quantity of a conductivity measuring cell, depending on

the geometry.

Conductivity Short form of the expression, specific electrical conductivity. It is a

measured value of the ability of a substance to conduct an electric current. In water analysis, the electrical conductivity is a dimension for the ionized substances in a solution.

Conductometry Name of the conductivity measuring technique.

Measured parameter The measured parameter is the physical dimension determined by

measuring, e. g. pH, conductivity or D. O. concentration.

Measured value The measured value is the special value of a measured parameter to

be determined. It is given as a combination of the numerical value and unit (e. g. 3 m; 0.5 s; 5.2 A; 373.15 K).

Measuring system The measuring system comprises all the devices used for measuring,

e. g. measuring instrument and sensor. In addition, there is the cable and possibly an amplifier, terminal strip and armature.

Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g sol-

vent.

Reference

temperature

Fixed temperature value to compare temperature-dependent measured values. For conductivity measurements, the measured value is converted to a conductivity value at a reference temperature of 20 °C or 25 °C.

Reset Restoring the original condition of all settings of a measuring system.

Resistance Short name for the specific electrolytic resistance. It corresponds to

the reciprocal value of the electrical conductivity.

Resolution Smallest difference between two measured values that can be dis-

played by a measuring instrument.

Lists Cond 1970i

Salinity The absolute salinity SA of seawater corresponds to the relationship

of the mass of dissolved salts to the mass of the solution (in g/Kg). In practice, this dimension cannot be measured directly. Therefore, the practical salinity is used for oceanographic monitoring. It is determined by measuring the electrical conductivity.

Salt content General designation for the quantity of salt dissolved in water.

Sample Designation of the sample ready to be measured. Normally, a test

sample is made by processing the original sample. The test sample and original sample are identical if the test sample was not processed.

Slope The slope of a linear calibration function.

Standard solution The standard solution is a solution where the measured value is

known by definition. It is used to calibrate a measuring system.

TDS Total dissolved solids

TDS factor In conductometric measurements, the measuring instrument calcu-

lates the total dissolved solids (TDS) from the electric conductivity of the test sample. For the calculation, a simple multiplication factor between 0.4 and 1.0 suffices. The exact factor depends on the quality of the water to be examined and has to be determined for each water type.

Temperature

Value of the slope of a linear temperature function.

coefficient

Temperature

compensation

Name of a function that considers the temperature influence on the measurement and converts it accordingly. Depending on the measured parameter to be determined, the temperature compensation functions in different ways. For conductimetric measurements, the measured value is converted to a defined reference temperature. For potentiometric measurements, the slope value is adjusted to the temperature of the test sample but the measured value is not converted.

Temperature function Name of a mathematical function expressing the temperature behav-

ior of a test sample, a sensor or part of a sensor.

Cond 1970i Index

Index

Analog output . . . . . . . . . . . . . . . . . . . 43

Authorized use . . . . . . . . . . . . . . . . . . . 9

AutoRead . . . . . . . . . . . . . . . . . . . . . 20

Batteries

Charging

Battery

Charging time

. . . . . . . . . . . . . . . . . . . . 11

. . . . . . . . . . . . . . . . 11

Calibration . . . . . . . . . . . . . . . . . . . . . 21

Calibration evaluation . . . . . . . . . . . . . . 22

Calibration record . . . . . . . . . . . . . . . . 22

Cell constant . . . . . . . . . . . . . . . . . . . 21

determine . . . . . . . . . . . . . . . . . . . 23

set manually . . . . . . . . . . . . . . . . . 25

Cell constant, displaying . . . . . . . . . . . . 28

Conductivity . . . . . . . . . . . . . . . . . . . . 18

Connecting a printer . . . . . . . . . . . . . . . 45

Data record . . . . . . . . . . . . . . . . . . . . 32

Data transmission (interval) . . . . . . . . . . 42

Default condition . . . . . . . . . . . . . . . . . 49

Display . . . . . . . . . . . . . . . . . . . . . . . . 6

Displaying the cell constant . . . . . . . . . . 21

Drift control . . . . . . . . . . . . . . . . . . . . 20

LoBat . . . . . . . . . . . . . . . . . . . . . . . . .53

Mains operation . . . . . . . . . . . . . . . . . .11

Measuring the temperature . . . . . . . . . . .17

Operating safety . . . . . . . . . . . . . . . . . .10

Plug-in power supply . . . . . . . . . . . . . . .11

Printing

calibration protocol

. . . . . . . . . . . . . .22

Remote control . . . . . . . . . . . . . . . . . . .45

Reset . . . . . . . . . . . . . . . . . . . . . . . . .49

RS232 interface . . . . . . . . . . . . . . . . . .45

Safety . . . . . . . . . . . . . . . . . . . . . . . . . .9

safety precautions . . . . . . . . . . . . . . . . . .9

Salinity . . . . . . . . . . . . . . . . . . . . . 18, 43

Save interval . . . . . . . . . . . . . . . . . . . .34

Scope of delivery . . . . . . . . . . . . . . . . .11

Setting the baud rate . . . . . . . . . . . . . . .46

Setting the date . . . . . . . . . . . . 12, 14, 48

Setting the time . . . . . . . . . . . . . . . 12, 48

Energy saving feature . . . . . . . . . . . . . 15

Error messages . . . . . . . . . . . . . . . . . 53

Initial commissioning . . . . . . . . . . . 12, 14

Initialization . . . . . . . . . . . . . . . . . . . . 49

Interval

data transmission

save . . . . . . . . . . . . . . . . . . . . . . . 34

. . . . . . . . . . . . . . 41

Keys . . . . . . . . . . . . . . . . . . . . . . . . . . 7

ba75692e01 01/2007

TDS . . . . . . . . . . . . . . . . . . . . . . . 19, 44

TDS factor . . . . . . . . . . . . . . . . . . . . . .19

Temperature compensation . . . . . . . . . .28

Temperature compensation (conductivity) .16 Temperature sensor

Conductivity

Total . . . . . . . . . . . . . . . . . . . . . . . . . .19

. . . . . . . . . . . . . . . . . .17

Index Cond 1970i

ba75692e01 01/2007

Wissenschaftlich-Technische Werkstätten GmbH

Dr.-Karl-Slevogt-Straße 1 D-82362 Weilheim

Germany

Tel: +49 (0) 881 183-0

+49 (0) 881 183-100 Fax: +49 (0) 881 183-420 E-Mail: Info@WTW.com Internet: http://www.WTW.com

Xylem Cond 1970i User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1Overview

1.1 Display

1.2 Keypad

1.3 Socket field

2 Safety

2.1 Authorized use

2.2 General safety instructions

3 Commissioning

3.1 Scope of delivery

3.2 Power supply

3.3 Initial commissioning

3.4 Sensor quiver

4 Operation

4.1 Switching on the measuring instrument

4.2 Measuring

4.2.1 General information

4.2.2 Conductivity

4.2.3 Salinity

4.2.4 TDS (Total dissolved solids)

4.2.5 AutoRead AR (drift control) and hold function

4.3 Determining/setting up the cell constant [C]

4.3.1 Determining the cell constant (calibrating)

4.3.2 Setting the cell constant manually

4.4 Setting the temperature compensation TC

4.4.1 Selecting the nonlinear temperature compensation

4.4.2 Selecting the linear temperature compensation

4.4.3 Switching the temperature compensation off

4.5 Saving

4.5.1 Saving manually

4.5.2 Saving automatically

4.5.3 Outputting the data storage

4.5.4 Clearing the memory

4.6 Transmitting data

4.6.1 Data transmission interval (Int 2)

4.6.2 Recorder (analog output)

4.6.4 Remote control

4.7 Configuration

4.8 Reset

5 Maintenance, cleaning, disposal

5.1 Maintenance

5.2 Cleaning

5.3 Disposal

6 What to do if...

7 Technical data

7.1 General data

7.2 Measuring ranges, resolutions, accuracies

8Lists