Xylem MULTI-3400i User Manual

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Page 1

pH/Oxi 3400i

Operating manual

ARng

g/l

pH/Oxygen measuring instrument

ba75686e01 01/2007

Page 2

Accuracy when

going to press

Warranty We guarantee the instrument described for 3 years from the date of

The use of advanced technology and the high quality standard of our instruments are the result of continuous development. This may result in differences between this operating manual and your instrument. Also, we cannot guarantee that there are absolutely no errors in this manual. Therefore, we are sure you will understand that we cannot accept any legal claims resulting from the data, figures or descriptions.

purchase. The instrument warranty covers manufacturing faults that are discovered within the warranty period. The warranty does not cover components that are replaced during maintenance work, e.g. batteries.

The warranty claim extends to restoring the instrument to readiness for use but not, however, to any further claim for damages. Improper handling or unauthorized opening of the instrument invalidates any warranty claim.

To ascertain the warranty liability, return the instrument and proof of purchase together with the date of purchase freight paid or prepaid.

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

Page 3

pH/Oxi 3400i Contents

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

1.1 General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2 SETs of equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.3 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.4 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.5 Jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.6 Operating structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 12

3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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

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

4.2 pH value / ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . 16

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

4.2.2 Measuring the pH value . . . . . . . . . . . . . . . . . . 18

4.2.3 Measuring the ORP voltage . . . . . . . . . . . . . . . 20

4.3 pH calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.3.1 AutoCal TEC . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.3.2 AutoCal DIN . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.3.3 ConCal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.4 Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.4.1 General information . . . . . . . . . . . . . . . . . . . . . . 33

4.4.2 Measuring the D. O. concentration . . . . . . . . . . 34

4.4.3 Measuring the D. O. saturation . . . . . . . . . . . . . 35

4.4.4 AutoRead AR (Drift control) . . . . . . . . . . . . . . . 36

4.4.5 D. O. calibration . . . . . . . . . . . . . . . . . . . . . . . . 37

4.4.6 Entering the salt content (salinity) . . . . . . . . . . . 40

4.5 Calibration intervals (Int 3, Int 4) . . . . . . . . . . . . . . . . . . 41

4.6 Saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.6.1 Saving manually . . . . . . . . . . . . . . . . . . . . . . . . 42

4.6.2 Switching on AutoStore (Int 1) . . . . . . . . . . . . . 44

4.6.3 Outputting the data storage . . . . . . . . . . . . . . . . 46

4.6.4 Clearing the memory . . . . . . . . . . . . . . . . . . . . . 51

4.7 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4.7.1 Data transmission interval (Int 2) . . . . . . . . . . . 52

4.7.2 PC/external printer (RS232 interface) . . . . . . . . 53

4.7.3 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . 54

4.8 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

4.9 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Page 4

Contents pH/Oxi 3400i

5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 61

5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

6.1 pH system messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

6.2 Oxi system messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

6.3 General errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Page 5

pH/Oxi 3400i Overview

1Overview

1.1 General features

This compact precision handheld meter enables you to carry out pH / ORP measurements and oxygen measurements rapidly and reliably. The handheld meter provides the maximum degree of operating comfort, reliability and measuring certainty for all applications.

The proven MultiCal

calibration procedures and the special Auto-

Read function support you in your work with the handheld meter.

ARng

g/l

1 Keypad

2 Sample display

3 Jack field

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.

Page 6

Overview pH/Oxi 3400i

1.2 SETs of equipment

The measuring instrument is also available as part of individual SETs of equipment. You will find additional information on this and other accessories in the WTW catalog or via the Internet.

Page 7

pH/Oxi 3400i Overview

Set (sample configuration):

1 pH/Oxi 3400i measuring instrument

2 50 ml ELY/G electrolyte solution for D.O. probes

3 Stand

4 RL/G cleaning solution for D.O. probes, 50 ml

5 50 ml pH buffer solution, STP 4

6 50 ml pH buffer solution, STP 7

7 Storing solution for pH electrodes

8 CellOx 325 D.O. probe with calibration vessel

9 SF300 abrasive film for D.O. probes

10 pH combination electrode

11 Plug-in power supply (optional)

12 3 WP 90/3 exchange membrane caps

Page 8

Overview pH/Oxi 3400i

1.3 Keypad

STOM

ARRCLCAL

RUN/ENTER

Key functions

STO

CAL

RCL

Select the measured variable <M>:

– pH value / ORP voltage

– D. O. concentration/saturation/partial

pressure

Save a measured value

<STO>

Switch measuring instrument on/off

Calibrate the currently set measured variable

<CAL>

Display/transmit measured values

<RCL>

Activate/deactivate the AutoRead function

<AR>

Select the measuring mode, increase values, scroll <▲ >

Select the measuring mode, decrease values, scroll <▼ >

RUN/ENTER

Confirm entries, start AutoRead

Page 9

pH/Oxi 3400i Overview

1.4 Display

Status display

TDS

UpH

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

1.5 Jack field

AutoCal DIN

Tref20

Lin

Cal

AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Probe symbol

Meas. value display

Function and temperature display

123

1 D. O. probe

2 pH electrode

3 pH temperature sensor

4 Plug-in power supply (optional)

5 Serial interface RS 232

Page 10

Overview pH/Oxi 3400i

1.6 Operating structure

The following overview diagram shows which keys you have to press to select between the different measuring modes:

Note

When connecting a D. O.probe with temperature sensor, the measuring instrument recognizes the probe and automatically switches to the last selected D. O. measuring mode. As soon as the probe is disconnected, the instrument switches to the pH or ORP measuring mode.

Page 11

pH/ 3400i Safety

2 Safety

This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the 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 The individual chapters of this operating manual use the following safe-

ty labels to indicate various types of danger:

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.

Further notes

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 pH and ORP measurement or the measurement of the oxygen content in the field and laboratory.

The technical specifications as given in chapter 7 T 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 to be unauthorized.

ECHNICAL DATA

Page 12

Safety pH/ 3400i

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 6 W

HAT TO DO IF....

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 pur-

chaser

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.

Page 13

pH/ 3400i Commissioning

3 Commissioning

3.1 Scope of delivery

z 3400i handheld meter

z Plug-in power supply (optional)

z Operating manual and short operating manual

z 4 batteries, 1.5 V Mignon type AA (in the instrument)

Setting the date and

time

For details of scope of delivery of SETs, see chapter 1.2 SET

EQUIPMENT and WTW catalog.

3.2 Initial commissioning

Perform the following activities:

z Set the date and time

z Connect the plug-in power supply (optional)

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 ap-

pears on the display.

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

5 Confirm with <RUN/ENTER>.

The date (month) flashes in the display.

S OF

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 <▲> <▼>.

Page 14

Commissioning pH/ 3400i

13 Confirm with <RUN/ENTER>.

The instrument switches to a measuring mode.

14 Switch the instrument off using <ON/OFF>.

Connecting the original

plug-in power supply

unit

You can either operate the measuring instrument with batteries or with the plug-in power supply. The plug-in power supply supplies the measuring instrument with low voltage (12 VDC). This saves the batteries.

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).

1 Plug the jack (1) into the socket (2) of the measuring instru-

ment.

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

accessible mains socket.

Page 15

pH/ 3400i Operation

4 Operation

4.1 Switching on the measuring instrument

1 Press the <ON/OFF> key.

The display test appears briefly on the display. After this, the measuring instrument automatically switches to the measuring mode.

Measuring mode when

switching on

Connected sensor Measuring mode

No sensor or pH/ORP electrode pH or ORP measurement (de-

pending on the last setting)

D. O. probe Last selected measuring mode

2 sensors Last selected measuring mode

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

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

z if the AutoStore function is active,

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

program are connected,

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

Page 16

Operation pH/ 3400i

4.2 pH value / ORP voltage

4.2.1 General information

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

1 Connect the pH electrode to the measuring instrument.

If necessary, press the <M> key repeatedly until the status dis- play pH (pH measurement) or U (measurement of the ORP voltage) appears.

2 Adjust the temperature of the buffer solutions or test solutions,

or measure the current temperature, if you measure without a temperature sensor.

3 Calibrate or check the measuring instrument with the elec-

trode.

4Using <▲ > <▼>, toggle between the pH or mV measuring

modes.

Note

Incorrect calibration of pH electrodes leads to incorrect measured values. Calibrate regularly before measuring. You can only connect electrodes of the NTC30 type or without temperature sensor.

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.

Page 17

pH/ 3400i Operation

Temperature measure-

ment in pH measure-

ments

You can perform pH measurements with or without a temperature sensor as well as with the temperature sensor of a D. O. probe. The measuring instrument recognizes which sensors are connected and automatically switches to the correct mode for the temperature measurement.

The following cases are distinguishable.

Temperature sensor Display Mode

pH Oxi

yes - TP Automatic with

pH temperature sensor

yes yes TP

- - Manual

-yesTP flashes

The temperature value of the 2nd sensor (Oxi) in the same test sample is used for the pH measurement*

* If you do not wish that, you can:

– either disconnect the 2nd sensor and use the manual temperature

input or

– use an electrode with a temperature sensor.

If a temperature sensor is connected, it is indicated on the display by TP.

Note

When calibrating without a temperature sensor (no TP display indicator displayed), enter the current temperature of the respective buffer solution manually using the <▲> <▼> keys while keeping the <RUN/EN-

TER> key depressed.

Page 18

Operation pH/ 3400i

4.2.2 Measuring the pH value

1 Perform the preparatory activities according to section 4.2.1.

2 Immerse the pH electrode in the test sample.

3 Press the <▲> <▼> keys until pH appears in the status display.

The pH value appears on the display.

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

4 When measuring without a connected temperature sensor:

Options:

z Determine the current temperature using a thermometer

z TP display indicator not displayed, socket for the second

AutoCal DIN

Tref20

Lin

Cal

AutoCal TEC

and, while keeping the <RUN/ENTER> key depressed, enter this temperature value with <▲> <▼>.

probe is free: Connect the second probe (Oxi) and immerse it in the same test sample. TP flashes, the temperature is automatically measured using the second probe.

SalOU

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

AutoRead AR

(drift control)

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.

For identical measurement conditions, the following criteria apply:

Reproducibility Response time

Better than 0.02 > 30 seconds

1 Call up the pH measuring mode with <M> and <▲> <▼> .

2 Activate the AutoRead function with <AR>.

The current measured value is frozen (hold function).

Page 19

pH/ 3400i Operation

3 Start AutoRead with <RUN/ENTER>.

AR flashes until a stable measured value is reached. This measured value is transmitted to the interface.

4 If necessary, start the next AutoRead measurement with

<RUN/ENTER>.

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

Note

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

Page 20

Operation pH/ 3400i

4.2.3 Measuring the ORP voltage

In conjunction with an ORP electrode, e.g. SenTix ORP, the measuring instrument can measure the ORP voltage (mV) of a solution.

1 Perform the preparatory activities according to section 4.2.1.

2 Submerse the ORP electrode in the sample.

3 Press the <▲> <▼> keys until the U status display appears.

The ORP voltage (mV) of the test sample appears on the display.

4 Wait for a stable measured value.

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

SalO

mbar

Auto

ARng

/pH

mg/l

Store

Sal

RCL

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

Note

ORP electrodes are not calibrated. However, you can check ORP electrodes using a test solution.

Page 21

pH/ 3400i Operation

4.3 pH calibration

Why calibrate? pH electrodes age. This changes the asymmetry (zero point) and slope

of the pH electrode. As a result, an inexact measured value is displayed. Calibration determines the current values of the asymmetry and slope of the electrode and stores them in the measuring instrument. Thus, you should calibrate at regular intervals.

When to calibrate? z After connecting another electrode

z When the sensor symbol flashes

– (after the calibration interval has expired)

– after a voltage interruption, e. g. after changing the batteries

You can select one of 3 calibration procedures:

AutoCal TEC is specially matched to the WTW technical buffer solutions as a fully au-

tomatic two-point calibration. The buffer solutions are automatically recognized by the measuring instrument. Depending on the instrument setting (see section 4.8 C relevant buffer nominal value or the current electrode voltage in mV. The calibration can be terminated after the first buffer solution. This corresponds to a single-point calibration. When doing so, the instrument uses the Nernst slope (-59,2 mV/pH at 25 °C) and determines the asymmetry of the electrode.

ONFIGURATION), the instrument displays the

AutoCal DIN is specially adapted to the permanently programmed buffer solutions in

ConCal This function is a conventional two-point calibration using two buffer

AutoRead When calibrating with AutoCal TEC and AutoCal DIN, the AutoRead

Displaying the calibra-

tion data

Printing the calibration

record

accordance with DIN 19266 as a fully automatic two-point calibration. The operating sequence of the AutoCal DIN calibration corresponds to that of the AutoCal TEC calibration. The calibration can only be terminated after the first buffer solution (single point calibration).

solutions (pH 7.0 ± 0.5 and any other buffer solution) or a single-point calibration using any buffer solution, which is used as a high-speed method.

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

You can view the data of the last calibration on the display. The proceeding is described on page 48.

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 50).

Page 22

Operation pH/ 3400i

Note

You can automatically print a calibration protocol after the calibration. To do so, connect a printer to the interface according to section 4.7.2 before calibrating. After a valid calibration, the record is printed.

Sample printout:

CALIBRATION PROTOCOL

02.03.01 14:19 Device No.: 12345678 Calibration pH Cal time: 01.03.01 / 15:20 Cal interval: 7d AutoCal TEC Tauto Buffer 1 2.00 Buffer 2 4.01 Buffer 3 7.00 * Buffer 4 10.00 C1 184.1 mV 25.0°C C2 3.0 mV 25.0°C S1 -59.4 mV/pH ASY1 - 4 mV Probe: +++

Calibration evaluation After the calibration, the measuring instrument automatically evaluates

the calibration. The asymmetry and slope are evaluated separately. The worst evaluation appears on the display.

Display Asymmetry

[mV]

Slope [mV/pH]

-15 ... + 15 -60.5 ... -58

-20 ... +20 -58 ... -57

-25 ... +25 -61 ... -60.5 or

-57 ... -56

-30 ... +30 -62 ... -61 or

-56 ... -50

Clean the electrode according to the electrode operating manual

Eliminate the error according to chapter 6 W

HAT TO DO IF...

< -30 or > 30

... -62 or ... -50

Page 23

pH/ 3400i Operation

Preparatory activities

1 Connect the pH electrode to the measuring instrument.

If necessary, press the <M> key repeatedly until the status display pH (pH measurement) or U (measurement of the ORP voltage) appears.

2 Keep the buffer solutions ready.

3 Adjust the temperature of the solution and measure the current

temperature if the measurement is made without the use of a temperature sensor (the TP display indicator is missing from the display).

4.3.1 AutoCal TEC

For this procedure, use any two WTW technical buffer solutions (pH values at 25 °C: 2.00 / 4.01 / 7.00 / 10.01).

Note

The calibration for pH 10.01 is optimized for the WTW technical buffer solution TEP 10 Trace or TPL 10 Trace. Other buffer solutions can lead to an erroneous calibration. The correct buffer solutions are given in the WTW catalog or in the Internet.

Note

The buffer solutions are automatically recognized by the measuring instrument. Depending on the instrument setting (see section 4.8 C

ONFIGURATION ), the instrument displays the relevant buff-

er nominal value or the current electrode voltage in mV.

Note

Skip the steps 2 and 7 if you use a pH electrode with a temperature sensor or the temperature sensor of a D. O.probe.

1 Press the <CAL> key repeatedly until the Ct1 display indicator

and the function display AutoCal TEC appears. The sensor symbol displays the evaluation of the last calibration (or no sensor symbol in the delivery state or after the measurement parameters have been reset).

Page 24

Operation pH/ 3400i

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

2 If required, enter the temperature of the first buffer solution with

<▲> <▼> while keeping the <RUN/ENTER> key depressed.

3 Immerse the pH electrode in the first buffer solution.

4 Press the <RUN/ENTER> key.

The AR display indicator flashes. The electrode voltage (mV) or the buffer nominal value appears on the display. Example:

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

Sal

/pH

mg/l

AutoCal DIN

Tref20

Cal

Lin

AutoCal TEC

AutoCal DIN

Tref20

Cal

Lin

AutoCal TEC

mbar

Sal

Store

Auto

ARng

RCL

TDSTDS

Store

Auto

ARng

RCL

Time

Day.Month No.

Year

Tref25

LoBat

nLF

Baud

Ident

Lin

Tref20

Cal

pHpH

OO UpHUpH SalSal

AutoCal DIN AutoCal TEC

mbarmbar

mV/pHmV/pH

1/1/

Auto

ARng

mg/lmg/l

S/S/

cmcm

Store

ARAR

SalSal

RCL

5 When the measured value is stable, Ct2 appears.

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

Sal

mbar

Auto

ARng

/pH

mg/l

Store

Sal

RCL

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

Note

At this point, the AutoCal TEC calibration can be terminated with <M>. This corresponds to a single-point calibration. When doing so, the in-

Page 25

pH/ 3400i Operation

strument uses the Nernst slope (-59,2 mV/pH at 25 °C) and determines the asymmetry of the electrode.

6 Thoroughly rinse the electrode with deionized water.

7 If required, enter the temperature of the second buffer solution

with <▲> <▼> while keeping the <RUN/ENTER> key depressed.

8 Immerse the pH electrode in the second buffer solution.

9 Press the <RUN/ENTER> key.

The AR display indicator flashes. The electrode voltage (mV) or the buffer nominal value appears on the display. Example:

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

10 When the measured value is stable, AR disappears. The value

of the slope (mV/pH) appears on the display. The probe symbol shows the evaluation of the current calibration.

TDS

Tref20

Lin

AutoCal DIN

Cal

AutoCal TEC

Time

Day.Month

Year

LoBat

Baud

No.

Ident

Tref25 nLF

Tref20

Lin

Cal

AutoCal DIN AutoCal TEC

Store

Auto

ARng

RCL

Sal

mV/pH

mg/l

mbar

Sal

Store

Auto

ARng

RCL

TDS

Time

Day.Month No.

Year

Tref25

LoBat

nLF

Baud

Ident

Lin

Tref20

Cal

pHpH

OO UpHUpH SalSal

AutoCal DIN AutoCal TEC

mbarmbar

ARng

mV/pHmV/pH

Auto

1/1/

mg/lmg/l

S/S/

Store

ARAR

cmcm

SalSal

RCL

11 Press the <RUN/ENTER> key. The value of the asymmetry

(mV) appears on the display.

Page 26

Operation pH/ 3400i

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

Sal

mbar

Auto

ARng

mg/l

Store

Sal

RCL

TDS

Baud

Time

Day.Month

12 Switch to the measuring mode with <M>.

Year

LoBat

No.

Ident

Tref25 nLF

Page 27

pH/ 3400i Operation

4.3.2 AutoCal DIN

For this procedure, use two different standard buffer solutions according to DIN 19266 (type A, C, D or F with pH values at 25 °C of: 1.679 /

4.006 / 6.865 / 9.180).

Note

Skip the steps 2 and 7 if you use a pH electrode with a temperature sensor or the temperature sensor of a D. O.probe.

1 Press the <CAL> key repeatedly until the display Cd1 and the

function display AutoCal DIN appear. The sensor symbol displays the evaluation of the last calibration (or no sensor symbol in the delivery state or after the measurement parameter has been reset).

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

2 If required, enter the temperature of the first buffer solution with

<▲> <▼> while keeping the <RUN/ENTER> key depressed.

3 Immerse the pH electrode in the first buffer solution.

4 Press the <RUN/ENTER> key.

The AR display indicator flashes. The electrode voltage (mV) or the buffer nominal value appears on the display. Example:

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

Sal

/pH

mg/l

AutoCal DIN

Tref20

Cal

Lin

AutoCal TEC

AutoCal DIN AutoCal DIN

Tref20

Cal

Lin

AutoCal TEC

mbar

Sal

Store

Auto

ARng

RCL

TDSTDS

Baud

Store

Auto

ARng

RCL

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

Lin

Tref20

Cal

pHpH

OO UpHUpH SalSal

AutoCal TEC

mbarmbar

Auto

ARng

mV/pHmV/pH

mg/lmg/l

S/S/

cmcm

SalSal

1/1/

Store

ARAR

cmcm

RCL

Page 28

Operation pH/ 3400i

5 When the measured value is stable, Cd2 appears.

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

Sal

mbar

Auto

ARng

/pH

mg/l

Store

Sal

RCL

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

Note

At this point, the AutoCal DIN calibration can be terminated with <M>. This corresponds to a single-point calibration. When doing so, the in- strument uses the Nernst slope (-59,2 mV/pH at 25 °C) and determines the asymmetry of the electrode.

6 Thoroughly rinse the electrode with deionized water.

7 If required, enter the temperature of the second buffer solution

with <▲> <▼> while keeping the <RUN/ENTER> key de- pressed.

8 Immerse the pH electrode in the second buffer solution.

9 Press the <RUN/ENTER> key.

The AR display indicator flashes. The electrode voltage (mV) or the buffer nominal value appears on the display. Example:

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

TDSTDS

AutoCal DIN

Tref20

Cal

Lin

AutoCal TEC

Auto

ARng

Store

RCL

Time

Day.Month No.

Year

Tref25

LoBat

nLF

Baud

Ident

Lin

Tref20

Cal

pHpH

OO UpHUpH SalSal

AutoCal DIN AutoCal TEC

mbarmbar

mV/pHmV/pH

1/1/

Auto

ARng

mg/lmg/l

S/S/

Store

ARAR

cmcm

SalSal

RCL

Page 29

pH/ 3400i Operation

10 When the measured value is stable, AR disappears. The value

of the slope (mV/pH) appears on the display. The probe symbol shows the evaluation of the current calibration.

No.

Lin

Tref20

Cal

Tref20

Cal

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

Sal

mbar

Auto

ARng

mg/l

Store

mg/l

Store

Sal

RCL

Sal

RCL

TDS

Baud

Time

Day.Month

Year

Ident

Tref25

LoBat

nLF

11 Press the <RUN/ENTER> key. The value of the asymmetry

(mV) appears on the display.

TDS

Baud

Time

Day.Month

Year

Ident

Tref25

LoBat

nLF

12 Switch to the measuring mode with <M>.

Page 30

Operation pH/ 3400i

4.3.3 ConCal

Two-point calibration For this procedure, use two buffer solutions:

z pH 7.0 ± 0.5

z any other buffer solution

Note

Skip the steps 2 and 8 if you use a pH electrode with a temperature sensor or the temperature sensor of a D. O.probe.

1 Press the <CAL> key repeatedly until the ASY display and the

Cal function display appears. The sensor symbol displays the evaluation of the last calibration (or no sensor symbol in the delivery state or after the measurement parameter has been reset).

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

2 If required, enter the temperature of the first buffer solution with

3 Immerse the pH electrode in the first buffer solution (pH 7.0 ±

4 Press the <RUN/ENTER> key.

5 Set the measured value to the nominal pH value of the buffer

6 When the measured value is stable, press the <RUN/ENTER>

Lin

nLF

<▲> <▼> while keeping the <RUN/ENTER> key depressed.

0.5 in two-point calibration).

The measured pH value appears on the display.

solution (at the current temperature) with <▲> <▼>.

key. The value of the asymmetry appears.

Cal

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

7 Press the <RUN/ENTER> key. SLO appears.

Note

At this point, the ConCal calibration can be broken off with <M>. This corresponds to a single-point calibration. When doing so, the instru- ment uses the Nernst slope (-59,2 mV/pH at 25 °C) and the fixed asymmetry of the electrode.

Page 31

pH/ 3400i Operation

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

8 Thoroughly rinse the electrode with deionized water.

9 If required, enter the temperature of the second buffer solution

10 Immerse the pH electrode in the second buffer solution.

11 Press the <RUN/ENTER> key.

12 Set the measured value to the nominal pH value of the buffer

Lin

nLF

with <▲> <▼> while keeping the <RUN/ENTER> key depressed.

solution (at the current temperature) with <▲> <▼>.

Cal

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

13 When the measured value is stable, press the <RUN/ENTER>

key. The value of the slope (mV/pH) appears on the display. The probe symbol shows the evaluation of the current calibration.

Lin

Tref20

Cal

AutoCal DIN

AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

TDS

Baud

Time

Day.Month

14 Press the <RUN/ENTER> key. The value of the asymmetry

No.

Year

Ident

Tref25

LoBat

nLF

(mV) appears on the display.

Page 32

Operation pH/ 3400i

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

Sal

mbar

Auto

ARng

mg/l

Store

Sal

RCL

TDS

Baud

Time

Day.Month

No.

Year

Ident

Tref25

LoBat

nLF

15 Switch to the measuring mode with <M>.

Page 33

pH/ 3400i Operation

4.4 Dissolved oxygen

4.4.1 General information

Note

D. O. measurements with the pH/ Oxi3400i can only be carried out using a CellOx 325 or StirrOx G D. O. probe. The stirrer of the StirrOx G D. O. probe has to be supplied with voltage separately using the NT/pH Mix 540 power supply.

You can measure the following variables:

z D. O. concentration

z D. O. saturation

The pH/Oxi 3400i handheld meter is equipped with the following functions:

z AutoRange (automatic measurement range selection),

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

measurement signal. This ensures the reproducibility of the measurement signal. For details of how to switch the AutoRead function on/off, see page 36.

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.

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

1 Connect the D. O. probe to the measuring instrument. The in-

strument automatically switches over to D. O. measurement (O

status display).

If the D. O. probe is already connected, press the <M> repeat- edly until the O

status display appears.

2 Calibrate or check the measuring instrument with the probe.

How to calibrate is described in section 4.4.5 from page 37.

3 Immerse the D. O. probe in the test sample.

4Use <▲> <▼> to toggle between the measuring modes, D. O.

concentration (mg/L) and D. O. saturation (%).

Note

Incorrect calibration of D. O. probes will result in incorrect measured values. Calibrate at regular intervals.

Page 34

Operation pH/ 3400i

Temperature sensor The D. O. probe has an integrated temperature sensor that always

measures the current temperature of the test sample.

4.4.2 Measuring the D. O. concentration

When measuring the concentration of test samples with a salt content of more than 1 g/l, a salinity correction is required.

Note

How to enter the current salt content is described in section 4.4.6 E Switching the salt content correction on or off, see below.

To measure the D. O. concentration with and without salt content correction, proceed as follows:

1 Perform the preparatory activities according to section 4.4.1.

NTERING THE SALT CONTENT (SALINITY) on page 40.

Switching on/off salt

content correction

2 Immerse the D. O. probe in the test sample.

3 Press the <▲> <▼> key repeatedly until the D. O. concentra-

tion in mg/l appears on the display.

TDS

UpH Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Baud

Time

Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

Proceed as follows to switch on the salt content correction:

1 Perform the preparatory activities according to section 4.4.1.

2 While pressing the <RUN/ENTER> key, switch on the salt con-

Lin

nLF

tent correction with <▲> . The SAL display indicator appears on the display. The specified salt content is taken into consideration during the measurement.

Cal

AutoCal DIN

AutoCal TEC

Page 35

pH/ 3400i Operation

TDS

UpH Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Baud

Time

Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

3 While pressing the <RUN/ENTER> key, switch off the salt con-

4.4.3 Measuring the D. O. saturation

Lin

nLF

tent correction with <▼>. The SAL display indicator is no longer displayed.

Cal

AutoCal DIN AutoCal TEC

You can measure the D. O. saturation as follows:

1 Perform the preparatory activities according to section 4.4.1.

2 Immerse the D. O. probe in the test sample.

3 Press the <▲> <▼> key repeatedly until the D. O. saturation in

% appears on the display.

TDS

UpH Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

Page 36

Operation pH/ 3400i

4.4.4 AutoRead AR (Drift control)

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.

1 Call up the measuring mode with <M> and/or <▲> <▼> .

2 Activate the AutoRead function with <AR>. The current mea-

sured value is frozen (hold function).

3 Start AutoRead with <RUN/ENTER>.

AR flashes until a stable measured value is reached. This measured value is transmitted to the interface.

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

Sal

/pH

mg/l

mbar

Sal

Store

Auto

ARng

RCL

Reproducibility Response time

better than 0.05 mg/l > 10 seconds

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

4 If necessary, start the next AutoRead measurement with

<RUN/ENTER>.

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

Criteria With identical measurement conditions, the following applies:

Measured parameter

D. O. concentration

D. O. saturation index

better than 0.6 % > 10 seconds

Page 37

pH/ 3400i Operation

4.4.5 D. O. calibration

Why calibrate? D. O. probes age. This changes the slope of the D. O. probe. Calibra-

tion determines the current slope of the probe and stores this value in the instrument.

When to calibrate? z After connecting another D. O. probe

z When the probe symbol flashes (after the calibration interval has ex-

pired).

Calibration procedures The calibration is performed in water vapor-saturated air. Use the

OxiCal

-SL air calibration vessel (accessories) for the calibration.

AutoRead The calibration procedure automatically activates the AutoRead func-

tion. The AR display indicator flashes. The calibration process is finished when AR stops flashing.

Displaying the calibra-

tion data

Printing the

calibration protocol

You can view the data of the last calibration on the display. The proceeding is described on page 48.

The calibration record contains the calibration data of the current calibration. You can transmit the calibration protocol to a printer via the serial interface (see page 50).

Note

Page 38

Operation pH/ 3400i

Sample printout:

CALIBRATION PROTOCOL

02.03.01 14:19 Device No.: 12345678 CALIBRATION 02 Cal time: 02.03.01 / 14:19 Cal interval: 14d OxiCal Tauto AR Relative Slope: 0,88 Probe: +++

Probe evaluation After the calibration, the measuring instrument evaluates the current

status of the probe against the relative slope. The evaluation appears on the display. The relative slope has no effect on the measuring accuracy. Low values indicate that the electrolytic filling will soon be depleted and the probe has to be regenerated.

Display Relative slope

S = 0.8 ... 1.25

S = 0.7 ... 0.8

S = 0.6 ... 0.7

S < 0.6 or S > 1.25

Eliminate the error according to chapter 6 W

HAT TO DO IF...

Starting the calibration Proceed as follows to calibrate the instrument:

1 Perform the preparatory activities according to section 4.4.1.

2 Keep the OxiCal

-SL air calibration vessel ready.

Note

The sponge in the air calibration vessel must be moist (not wet). Follow the instructions in the OxiCal

-SL operating manual.

Page 39

pH/ 3400i Operation

3 Put the D. O. probe into the air calibration vessel.

4 Press the <CAL> key repeatedly until the calibration mode ap-

pears. The sensor symbol displays the evaluation of the last calibration (or no sensor symbol in the delivery state or after the measurement parameter has been reset).

TDS

UpH Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Time

Day.Month No.

Year

Tref25

LoBat

nLF

Baud

Ident

Lin

Tref20

Cal

AutoCal DIN

AutoCal TEC

5 Press the <RUN/ENTER> key. AutoRead is active, AR flashes.

TDS

UpH Sal

mV/pH

mbar

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Baud

Time

Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

6 As soon as a stable value is reached, the AR display indicator

Lin

nLF

stops flashing. The calibration is finished now. The value of the relative slope appears on the display. The probe symbol shows the probe evaluation (see page 38).

TDS

AutoCal DIN

Cal

AutoCal TEC

UpH Sal

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

Tref20

Lin

Cal

AutoCal DIN AutoCal TEC

7 Switch to the measuring mode with <M>.

Page 40

Operation pH/ 3400i

Note

In chapter 6 W to take for error elimination.

4.4.6 Entering the salt content (salinity)

A salt content correction is required in the oxygen concentration measurement of test samples with a salt content of more than 1 g/l. To do this, you have to enter the salinity equivalent of the test sample (range

0.0 - 70.0) and to switch on the salinity correction.

HAT TO DO IF... from page 63, you will find the measures

Entering the salinity

1 Determine the salinity of the test sample.

2 Press the <CAL> key repeatedly until Sal appears on the dis-

play.

TDS

UpH Sal

Baud

Time

Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

3 Enter the salt content with <▲> <▼>.

4 Switch to the measuring mode with <M>.

Note

How to switch on the salt content correction is described on page 34.

nLF

Lin

Cal

AutoCal DIN AutoCal TEC

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Page 41

pH/ 3400i Operation

4.5 Calibration intervals (Int 3, Int 4)

For each measured variable, a time interval is stored. When it has expired, you will be reminded to calibrate. After a calibration interval has expired, the probe symbol of the relevant measured variable flashes. It is still possible to measure. By calibrating the relevant probe, the function is reset and the interval starts anew.

The following calibration intervals are set in the factory:

Setting the calibration

interval

Measured parameter

pH/ORP Int 3 7 days (d 7)

Dissolved oxygen

You can change each of these intervals (1 ... 999 days):

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. After this, the measuring instrument automatically switches over to configuration.

4 Press the <RUN/ENTER> key repeatedly until Int3 or Int4 and

the required measured variable pH or O

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

nLF

Lin

Designation Default setting

Int 4 14 days (d 14)

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Cal

AutoCal DIN AutoCal TEC

appears. Example:

5 Set the required interval (in days) until the next calibration with

<▲> <▼>.

6 Confirm with <RUN/ENTER>.

7 Switch to the measuring mode with <M>.

Page 42

Operation pH/ 3400i

4.6 Saving

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

z Number of the storage location

z Date/time

z Measured values of the probes connected

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), (see page 44).

4.6.1 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.

TDS

Baud

Time

Day.Month

No.

Year

Ident

Tref20

Tref25

LoBat

2 Confirm with <RUN/ENTER>.

Lin

nLF

The display switches to entering the ID number.

Cal

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Page 43

pH/ 3400i Operation

Message StoFull

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

StoFullStoFull

TDS

Baud

Time

Day.Month

pied.

You have the following options:

No.

Year

Ident

Tref20

Tref25

LoBat

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

4 Confirm with <RUN/ENTER>.

Lin

nLF

(1 ... 999).

The measured values are stored. The instrument changes to the measuring mode.

Cal

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

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

Returning to the measuring mode without saving press any key

Outputting the data storage see

Clearing the memory see

Press

section 4.6.3

section 4.6.4

Page 44

Operation pH/ 3400i

4.6.2 Switching on AutoStore (Int 1)

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 internal storage and to the interface.

Setting the

save interval

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

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

3 Set the required interval between the saving procedures with

<▲> <▼> (Selection: 5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min).

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

OUpH

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

4 Confirm with <RUN/ENTER>.

The number of free memory locations appears on the display.

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

5 Confirm with <RUN/ENTER>.

The prompt for the ID number appears on the display.

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

OUpH

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Page 45

pH/ 3400i Operation

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

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

7 Confirm with <RUN/ENTER>.

The measuring instrument switches to the last active measuring mode and starts the measuring and saving procedure. AutoStore flashes on the display.

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:

z Output and backup the data storage (see page 46) and

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

OUpH

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

z Clear the memory (see page 51).

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.

Page 46

Operation pH/ 3400i

4.6.3 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 to the interface

Outputting stored data

on the display

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

display.

ISE

UpH

°F

CalError

ARng

Sal

mV/pH

mbar

Auto

ARng

mol/L mV/pH % ppm

mg/L

°C

TempError

mg/l

Sal

Store

RCL

Baud

Time

Day.Month

LoBat

2 Press the <RUN/ENTER> key.

No.

Year

Ident

AutoCal DIN

AutoCal TEC

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.

TDS

Auto

ConCal

Store

Time

Year

LoBat

Baud

No.Day.Month

Ident

Tref25 nLF

Tref20

Lin

Cal

AutoCal DIN AutoCal TEC

You can perform the following activities:

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

Toggle between two saved measured variables

Advance one data record (storage location)

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

Press <RUN/ENTER>

+ <M>

Press <▲>

Page 47

pH/ 3400i Operation

Note

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

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

2 Press <▲> or <▼> repeatedly until the required element ap-

pears 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.

ISE

UpH

°F °C

CalError

ARng

mol/L mV/pH % ppm

mg/L

TempError

RCL

Baud

Time

Day.Month

LoBat

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

No.

Year

Ident

AutoCal DIN

AutoCal TEC

2 Press the <RUN/ENTER> key.

The complete contents of the storage are transmitted to the interface. During the data transmission the instrument increments the storage numbers. After the data transmission, the instrument automatically switches to the last active measurement mode.

Auto

ConCal

Store

The transmitted data contains the entire contents of the storage in incrementing order of the location numbers.

Page 48

Operation pH/ 3400i

Sample printout:

No. 1:

09.03.99 17:10 pH 10.01 25 °C Tman AR Ident : 1

No. 2:

09.03.99 17:11 pH 10.01 24.7 °C Tauto AR Ident : 1

No. 3:

09.03.99 17:12

305.2 mV Tauto Ident : 13

...

Outputting the

calibration data

on the display

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

display.

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

2 Press the <RUN/ENTER> key.

The data of the last calibration of all measured variables appears in the following sequence:

z pH: Slope SLO and asymmetry ASY

z Dissolved oxygen: Relative slope SLO

Information concerning the calibration procedure is output as well.

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

OUpH

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Time

Day.Month

Year

LoBat

TDS

Baud

No.

Ident

Tref25 nLF

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Page 49

pH/ 3400i Operation

3 Press <RUN/ENTER> to display the value of the asymmetry

(mV).

No.

Lin

Tref20

Cal

UpH

Tref20

Cal

AutoCal DIN AutoCal TEC

Sal

mbar

Auto

ARng

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

mg/l

Store

Sal

RCL

Sal

RCL

TDS

Baud

Time

Day.Month

Year

Ident

Tref25

LoBat

nLF

4 Press <RUN/ENTER> to display the relative slope of the D. O.

probe.

TDS

Baud

Time

Day.Month

Year

Ident

Tref25

LoBat

nLF

5 With <M> you can switch back to the last active measuring

mode.

Page 50

Operation pH/ 3400i

Outputting the calibra-

tion protocol on the

interface

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

display.

TDS

Sal

OUpH

mV/pH

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

2 Press the <RUN/ENTER> key.

The calibration protocol for all measured variables is transmitted to the interface. After the data transmission, the instrument automatically switches to the last active measurement mode.

Sample printout:

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

mbar

Auto

ARng

mg/l

Store

Sal

RCL

CALIBRATION PROTOCOL

02.03.01 14:19 Device No.: 12345678

Calibration pH Cal time: 01.10.01 / 15:20 Cal interval: 7d AutoCal TEC Tauto Buffer 1 2.00 Buffer 2 4.01 Buffer 3 7.00 * Buffer 4 10.00 C1 174.1 mV 25.0°C C2 -133.3 mV 25.0°C S1 -59.4 mV/pH ASY1 - 4 mV Probe: +++

CALIBRATION 02 Cal time: 02.03.01 / 14:19 Cal interval: 14d OxiCal Tauto AR Relative Slope: 0,88 Probe: +++

CALIBRATION ISE Cal time: 01.10.01 / 15:30 Std 1 10,00 mg/l Std 2 20,00 mg/l Std 3 50,00 mg/l

Page 51

pH/ 3400i Operation

4.6.4 Clearing the memory

With this function, you can delete 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 last active 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.

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

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

Note

The calibration data remain stored and can be called up.

Page 52

Operation pH/ 3400i

4.7 Transmitting data

You have the following possibilities of transmitting data:

z One of the following options:

– With the AutoStore function (page 44), 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 46), calibration data or

saved measured values are output on the interface.

4.7.1 Data transmission interval (Int 2)

The interval to 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.

Setting the

Data transmission

interval

Note

The setting of the interval (Int 2) is only effective if the save interval (AutoStore function) is switched off!

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.

TDS

Time Day.Month No.

Year

Tref25

LoBat

nLF

Baud

Ident

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

OUpH

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

3 Set the required interval between the saving procedures with

<▲> <▼>.

Page 53

pH/ 3400i Operation

CTS

4 Confirm with <RUN/ENTER>.

The measuring instrument switches to the last active measuring mode.

Note

When the AutoStore function is active at the same time, the data trans-

mission 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 in-

terval (Int 2).

4.7.2 PC/external printer (RS232 interface)

Via the RS 232 interface, you can transmit the data to a PC or an ex-

ternal printer. Use the AK340/B (PC) or AK325/S (ext. printer) cable to

connect the interface to the instruments. The data output automatically

switches to the RS232 interface.

Socket assignment

Warning

The RS232 interface is not galvanically isolated.

When connecting an earthed PC/printer, measurements cannot be per-

formed in earthed media as incorrect values would result.

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

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

Handshake RTS/CTS + Xon/Xoff

Parity none

Data bits 8

Stop bits 2

Cable length Max. 15 m

1 2 RxD

RS 232

REC

3 Ground 4TxD

Page 54

Operation pH/ 3400i

4.7.3 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.

Note

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

Page 55

pH/ 3400i Operation

4.8 Configuration

You can adapt the measuring instrument to your individual require-

ments. To do this, the following parameters can be changed (the status

on delivery is marked in bold):

Baud rate 1200, 2400, 4800, 9600

Display during the

pH calibration

Air pressure display Current value in mbar

Intervals

Calibration (Int 3)

in days (d)

Date/time Any

Note

You can leave the configuration menu at any time with <M>. The pa-

rameters that have already been changed are stored.

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.

Buffer nominal value, or current electrode voltage

(no input possible)

– pH: 1 ... 7 ... 999 d Int 3

1 ... 14 ... 999 d Int 4

– O

Baudrate

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

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

5 Confirm with <RUN/ENTER>. CAL dISP appears on the dis-

play.

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

OUpH

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Page 56

Operation pH/ 3400i

Displaying the air

pressure

TDS

Baud

Time Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

6 Select the required display during the pH calibration with

7 Confirm with <RUN/ENTER>. On the display, P mbar and the

Lin

nLF

<▲> <▼>.

mV: Display of the current electrode voltage /pH: Display of the buffer nominal value.

current air pressure appears.

TDS

Baud

Time Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

nLF

Lin

Cal

AutoCal DIN AutoCal TEC

OUpH

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

Sal

mV/pH

mbar

Auto

ARng

/pH

mg/l

Store

mg/l

Store

Sal

RCL

Sal

RCL

Calibration

intervals pH

8 Confirm with <RUN/ENTER>. pH Int 3 and the measured vari-

able pH appear on the display.

TDS

Baud

Time Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

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

10 Confirm with <RUN/ENTER>. Int 4 and the measured variable

Lin

nLF

appears on the display.

Cal

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Page 57

pH/ 3400i Operation

TDS

UpH Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Baud

Time

Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

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

12 Confirm with <RUN/ENTER>. The date flashes on the display.

nLF

Lin

Cal

AutoCal DIN AutoCal TEC

Date and time

TDS

Baud

Time

Day.Month

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

14 Confirm with <RUN/ENTER>.

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

16 Confirm with <RUN/ENTER>.

17 Set the current year with <▲> <▼>.

18 Confirm with <RUN/ENTER>.

No.

Year

Ident

Tref25

LoBat

nLF

The date (month) flashes on the display.

The year appears on the display.

The hours flash on the display.

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

OUpH

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

19 Set the current time with <▲> <▼>.

20 Confirm with <RUN/ENTER>.

The minutes flash on the display.

21 Set the current time with <▲> <▼>.

22 Confirm with <RUN/ENTER>.

The measuring instrument switches to the last active measuring mode.

Page 58

Operation pH/ 3400i

4.9 Reset

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

Measurement

parameters

Oxi

The following measuring parameters are reset to the delivery status:

Measuring mode pH

Slope -59.16 mV/pH

Asymmetry 0 mV

Manual temperature input 25 °C

Measuring mode D. O. concentration

Relative slope 1.00

Salinity (value) 0.0

Salinity (function) off

Note

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

Configuration

parameters

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

Baud rate 4800

Display during the

Buffer nominal value

pH calibration

Interval 1 (automatic save) OFF

Interval 2 (for data transmission) OFF

Page 59

pH/ 3400i Operation

Resetting the

measuring parameters

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

2 Press the <CAL> key. The setting to reset the pH measuring

parameters appears on the display.

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

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

4 Confirm with <RUN/ENTER>.

Lin

nLF

YES: Resetting the pH measuring parameters no: Retaining settings.

The measuring instrument switches to the setting to reset the O

measuring parameters.

Cal

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref25

LoBat

nLF

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

YES: Resetting the O no: Retaining settings.

6 Confirm with <RUN/ENTER>. The measuring instrument

switches to the configuration parameters.

Lin

Tref20

Cal

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Sal

Store

RCL

measuring parameters.

Page 60

Operation pH/ 3400i

Resetting the

configuration parame-

ters

TDS

Baud

Time

Day.Month No.

Year

Ident

Tref20

Tref25

LoBat

7 Using <▲> <▼>, toggle between no and YES.

8 Confirm with <RUN/ENTER>.

Lin

nLF

YES: Resetting the configuration parameters no: Retaining settings.

The measuring instrument automatically switches to the last active measuring mode.

Cal

OpH

AutoCal DIN AutoCal TEC

Sal

mV/pH

mbar

Auto

ARng

mg/l

Store

Sal

RCL

Page 61

pH/ 3400i Maintenance, cleaning, disposal

5 Maintenance, cleaning, disposal

5.1 Maintenance

The measuring instrument is almost maintenance-free.

The only maintenance task is replacing the batteries.

LoBat on the display indicates that the batteries should be changed.

The batteries are then largely depleted.

Replacing the batteries

1 Open the housing after the instrument has been switched off:

– Undo the four screws on the underside of the instrument

– Pull down the lower cover (1).

2 If necessary, take the four depleted batteries (2) out of the bat-

tery compartment.

3 Place four new batteries (type Mignon AA) in the battery com-

partment.

4 Close the lower cover (1).

Warning

Make sure that the poles of the batteries are the right way round.

The

± signs on the batteries must correspond to the ± signs in the bat-

tery compartment. Only use leakproof alkaline manganese batteries.

Page 62

Maintenance, cleaning, disposal pH/ 3400i

Note

For maintenance of electrodes and sensors, follow the corresponding operating manual.

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 is made of a synthetic material (ABS). 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 instrument against damage during transport.

Batteries This note refers to the battery regulation that applies in the Federal Re-

public of Germany. We would ask end-consumers in other countries to follow their local statutory provisions.

Note

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 Dispose of the measuring instrument as electronic waste at an appro-

priate collection point. It is illegal to dispose of the instrument in household refuse.

Page 63

pH/ 3400i What to do if...

6 What to do if...

6.1 pH system messages

Error message 0FL

0FL

0FL0FL

Cause Remedy

pH electrode:

– Not connected – Connect electrode

Error message E3

E3E3

– Air bubble in front of the

– Remove air bubble

diaphragm

– Air in the diaphragm – Extract air or

moisten diaphragm

– Cable broken – Replace electrode

– Gel electrolyte dried out – Replace electrode

Cause Remedy

Electrode

– Diaphragm contaminated – Clean diaphragm

– Membrane contaminated – Clean membrane

– Moisture in the plug – Dry plug

– Electrolyte out of date – Replenish electrolyte or

replace electrode

– Electrode worn out – Replace electrode

– Electrode broken – Replace electrode

Measuring instrument:

– Incorrect calibration procedure – Select correct procedure

– Incorrect solution temperature

– Set up correct temperature

(without temperature sensor)

– Socket damp – Dry socket

Page 64

What to do if... pH/ 3400i

Buffer solutions

– Incorrect buffer solutions – Change calibration procedure

– Buffer solutions too old – Use only once.

Note the shelf life

– Buffer solutions depleted – Change solutions

No stable measured

Cause Remedy

value

pH electrode:

– Diaphragm contaminated – Clean diaphragm

– Membrane contaminated – Clean membrane

Obviously incorrect

measured values

Test sample:

– pH value not stable – Measure with air excluded if

necessary

– Temperature not stable – Adjust temperature if

necessary

Electrode + test sample:

– Conductivity too low – Use suitable electrode

– Temperature too high – Use suitable electrode

– Organic liquids – Use suitable electrode

Cause Remedy

pH electrode:

– pH electrode unsuitable – Use suitable electrode

– Temperature difference

between buffer and test

– Adjust temperature of buffers

or test samples

sample too high

– Measurement procedure not

suitable

– Follow special procedure

Page 65

pH/ 3400i What to do if...

6.2 Oxi system messages

Error message 0FL

Error message E3

0FL

0FL0FL

E3E3

Cause Remedy

Display range exceeded

D. O. probe:

– Not connected – Connect the probe

– Cable broken – Replace probe

– Depleted – Replace probe

– Short-circuit between gold and

lead electrode

– Clean probe and replace it if

necessary

Cause Remedy

Invalid calibration

D. O. probe:

– Electrolyte solution depleted – Regenerate probe

– Membrane contaminated – Clean membrane

Error message E7

E7E7

AR flashes

continuously

– Electrode system poisoned – Regenerate probe

– Worn out – Replace probe

– Broken – Replace probe

Cause Remedy

Membrane damaged

– Membrane damaged – Regenerate probe

– Membrane head not screwed

– Screw membrane head tight

on tight enough

Cause Remedy

No stable measured value

– Membrane contaminated – Clean membrane

Page 66

What to do if... pH/ 3400i

Measured value too low

Measured value too

high

Display LoBat

Cause Remedy

– Insufficient flow – Provide flow to the probe

Cause Remedy

– High amount of dissolved

substances

– Air bubbles bump on the

membrane with high velocity

– The carbon dioxide pressure is

– Correct solubility function

using the salinity equivalent

– Avoid direct flow to the

membrane

– Measuring not possible

too high (> 1 bar)

6.3 General errors

Cause Remedy

– Batteries almost empty – Exchange the batteries (see

section 5.1 M

AINTENANCE)

Instrument does not

react

to keystroke

Display to

toto

Probe symbol flashes

Message StoFull

StoFull

StoFullStoFull

Cause Remedy

– Operating condition undefined

or EMC load unallowed

– Processor reset:

Switch the instrument on while pressing the <CAL> key

Cause Remedy

– Time-out of the interface – Check the instrument that is

connected

Cause Remedy

– Calibration interval expired – Recalibrate the measuring

system

Cause Remedy

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

data storage

Page 67

pH/ 3400i Technical data

7 Technical data

Dimensions and weight

Length [mm] 172

Width [mm] 80

Height [mm] 37

Weight [kg] Approx. 0.3

Mechanical structure

Electrical safety

Ambient

conditions

pH/ORP measuring

ranges

Precision of pH/ORP

(± 1 digit)

Type of protection IP 66

Protective class III

Storage - 25 °C ... + 65 °C

Operation -10 °C ... + 55 °C

Climatic class 2

Measuring range Resolution

pH - 2.00 ... + 19.99 0.01

U [mV] - 1999 ... + 1999 1

T [°C] - 5.0 ... + 105.0 0.1

pH (after calibration) ± 0.01

U [mV] ± 1

pH temperature input:

T [°C] ± 0.1

- 20 °C ... + 130 °C

Page 68

Technical data pH/ 3400i

Oxi measuring ranges

Precision of

Oxi (± 1 digit)

mg/l % °C

Measuring range I Resolution

Measuring range II Resolution

Temperature resolution

0 ... 19.99

0.01

0 ... 90.0

0.1

0 ... 199.9

0.1

0 ... 600 1

0.1 - 5,0 ... + 105.0

0.1

Concentration ± 0.5 % of the measured value

at an ambient temperature of 5 °C ... 30 °C

Saturation ± 0.5 % of the measured value

when measuring in the range of ± 10 K around the calibration temperature

Temperature

< 2 % at 0 ... 40 °C

compensation

T [°C] ± 0.1

Correction functions of

Oxi

Salinity correction 0 ... 70.0 SAL

Air pressure correction Automatic through installation of

pressure sensor in the range 500 ... 1100 mbar

Page 69

pH/ 3400i Technical data

Serial

interface

Type RS232, data output

Baud rate Selectable 1200, 2400, 4800, 9600 baud

Data bits 8

Stop bit 2

Parity None

Handshake RTS/CTS + Xon/Xoff

Cable length Max. 15m

Power supply

Batteries 4 x 1.5 V alkali-manganese batteries, type

Operational life Approx. 3000 operating hours

Mains (optional) The following specifications apply to all

plug-in power supplies: Max. overvoltage connection category II

Plug-in power supply unit (Euro, US , UK, Australian plug) FRIWO FW7555M/09, 15.1432 Friwo Part. No. 1822089 Input: 100 ... 240 V ~ / 50 ... 60 Hz / 400 mA Output: 9 V = / 1,5 A

Plug-in power supply with Euro plug: FRIWO FW1199, 11.7864 Friwo Part. No. 1762613 Input: 230 V ~ / 50 Hz / 5.6 VA Output: 12 V = / 130 mA / 1.56 VA

Plug-in power supply with US plug: FRIWO FW1199, 11.7880 Friwo Part. No. 1794043 Input: 120 V ~ / 60 Hz / 6 VA Output: 12 V = / 150 mA

Plug-in power supply with UK plug: FRIWO FW1199, 11.7872 Friwo Part No. 1816491 Input: 230V ~ / 50 Hz / 5.6 VA Output: 12 V = / 130 mA / 1.56 VA

Page 70

Technical data pH/ 3400i

Guidelines

and norms used

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

Climatic class VDI/VDE 3540

Type of protection EN 60529:1991

FCC Class A Equipment Statement

Note: This equipment has been tested and found to comply with

the limits for a Class A digital device, pursuant to Part 15 of the

FCC Rules. These limits are designed to provide reasonable

protection against harmful interference when the equipment is

operated in a commercial environment. This equipment

generates, uses, and can radiate radio frequency energy and, if

not installed and used in accordance with the instruction manual,

may cause harmful interference to radio communications.

Operation of this equipment in a residential area is likely to cause

harmful interference in which case the user will be required to

correct the interference at his own expense.

Test certificates

cETLus, CE

Page 71

pH/ 3400i 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 will help you to find the topics that you are looking for.

Page 72

Lists pH/ 3400i

Abbreviations

AR AutoRead (drift control)

ARng Automatic range switching

Measuring instrument measures with highest resolution

ASY Asymmetry

AutoCal TEC Automatic pH calibration with WTW technical buff-

er solutions according to DIN 19267

°C Temperature unit, degrees Celsius

Cal Calibration

Cm... Display indicator during calibration for pH mea-

surements. Indicates the selection of buffer data records for buffer solutions of the Merck company

ConCal Conventional single-point or two-point calibration

for pH measurements

Ct... Display indicator during calibration for pH mea-

surements. Indicates the selection of the buffer data records for WTW technical buffer solutions

E3 Error message

see chapter 6 W

HAT TO DO IF...

InI Initialization

Resets individual basic functions to the status they had on delivery

LoBat Batteries almost empty(Low Battery)

mV Voltage unit

mV/pH Unit of the electrode slope (internat. mV)

OFL Display range exceeded (Overflow)

OxiCal Automatic calibration for D. O. measurements

pH pH value

S Slope (internat. k)

SAL Salinity

SELV Safety Extra Low Voltage

SLO Slope setting on calibration

Page 73

pH/ 3400i Lists

TP Temperature measurement active (Temperature

Probe)

ASY

Asymmetry

Page 74

Lists pH/ 3400i

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.

Amperometry Name of a measuring technique. The signal (depending on the mea-

sured parameter) of the probe is the electric current. The electrical voltage remains constant.

Asymmetry Designation for the offset potential of a pH electrode. It is the measur-

able potential of a symmetrical electrode, the membrane of which is immersed in a solution with the pH of the nominal electrode zero point (WTW electrodes: pH = 7).

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).

D. O. partial pressure Pressure caused by the oxygen in a gas mixture or liquid.

D. O. saturation Short name for the relative D. O. saturation.

Note: The D. O. saturation value of air-saturated water and the D. O. saturation value of oxygen-saturated water are different.

Diaphragm The junction is a porous body in the housing wall of reference elec-

trodes or electrolyte bridges. It forms the electrical contact between two solutions and makes electrolyte exchange more difficult. The expression, junction, is also used for ground or junction-less transitions.

Electrode zero point The zero point of a pH electrode is the pH value at which the electro-

motive force of the pH electrode at a specified temperature is zero. Normally, this is at 25 °C.

Electromotive force of

an electrode

The electromotive force U of the electrode is the measurable electromotive force of an electrode in a solution. It equals the sum of all the galvanic voltages of the electrode. Its dependency on the pH results in the electrode function which is characterized by the parameters, slope and zero point.

Measured parameter The measured parameter is the physical dimension determined by

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

Page 75

pH/ 3400i Lists

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 probe. 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.

MultiCal

WTW name stating that a measuring instrument provides several cal-

ibration procedures.

Offset potential The measurable potential of a symmetrical electrode, the membrane

of which is immersed in a solution with the pH of the nominal electrode

zero point. The asymmetry is part of the offset potential.

ORP voltage The ORP is caused by oxidizing or reducing substances dissolved in

water if these substances become effective on an electrode surface

(e. g. a gold or platinum surface).

OxiCal

WTW name for a procedure to calibrate D. O. measuring systems in

water vapor saturated air.

pH value The pH is a measure of the acidic or basic effect of an aqueous solu-

tion. It corresponds to the negative decadic logarithm of the molal hy-

drogen ions activity divided by the unit of the molality. The practical pH

value is the value of a pH measurement.

Potentiometry Name of a measuring technique. The signal (depending on the mea-

sured parameter) of the electrode is the electrical potential. The elec-

trical current remains constant.

Reference

temperature

Fixed temperature value to compare temperature-dependent mea-

sured 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.

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

played by a measuring instrument.

Salinity The absolute salinity S

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 deter-

mined by measuring the electrical conductivity.

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

Slope The slope of a linear calibration function.

Page 76

Lists pH/ 3400i

Slope (relative) Designation used by WTW in the D. O. measuring technique. It ex-

presses the relationship of the slope value to the value of a theoretical reference probe of the same type of construction.

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

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

Temperature

Value of the slope of a linear temperature function.

coefficient

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

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

Test 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.

Page 77

pH/Oxi 3400i Index

Asymmetry 21 Auslieferzustand 58 Authorized use 11 AutoCal DIN 21, 27 AutoCal TEC 21, 23 AutoRead 18

D. O. 36

Calibration evaluation 22

Dissolved oxygen 38 Calibration interval 41 Calibration procedures 21 Calibration protocol 21

D. O. 37 ConCal 21, 30 Connecting a printer 53 Connecting the original plugin power supply unit

Data record 42 Data transmission (interval)

Display 9 Drift control 18

D. O

Energy saving feature 15 Error messages 65

Initial commissioning 13 Initialization 58 Interval

calibration

data transmission 52

save 44

Keys 8

Measuring mode when switching on Measuring the D. O. concentration Measuring the D. O. saturation

Operating 10 Operating safety 12 ORP electrode 20 ORP voltage 20

Printing

calibration protocol

Probe evaluation (D. O.) 38

Remote control 54 Replacing the batteries 61 Reset 58 Resetting the measuring parameters RS232 interface 53

Safety 11 safety precautions 11 Salt content correction

entering the salinity

switching on 34 Save interval 44 Scope of delivery 13 Setting the baud rate 55 Setting the date 13, 57 Setting the time 13, 57 single-point calibration 21 Single-point calibration (pH)

21, 25, 28, 30

Slope 21, 37

Temperature sensor 34

pH 17

Two-point calibration

ConCal

two-point calibration 21 Two-point calibration (pH)

21, 25, 28, 30

Page 78

Index pH/Oxi 3400i

Page 79

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 MULTI-3400i User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1Overview

1.1 General features

1.2 SETs of equipment

1.3 Keypad

1.4 Display

1.5 Jack field

1.6 Operating structure

2 Safety

2.1 Authorized use

2.2 General safety instructions

3 Commissioning

3.1 Scope of delivery

3.2 Initial commissioning

4 Operation

4.1 Switching on the measuring instrument

4.2 pH value / ORP voltage

4.2.1 General information

4.2.2 Measuring the pH value

4.2.3 Measuring the ORP voltage

4.3 pH calibration

4.3.1 AutoCal TEC

4.3.2 AutoCal DIN

4.3.3 ConCal

4.4 Dissolved oxygen

4.4.1 General information

4.4.2 Measuring the D. O. concentration

4.4.3 Measuring the D. O. saturation

4.4.4 AutoRead AR (Drift control)

4.4.5 D. O. calibration

4.4.6 Entering the salt content (salinity)

4.6 Saving

4.6.1 Saving manually

4.6.2 Switching on AutoStore (Int 1)

4.6.3 Outputting the data storage

4.6.4 Clearing the memory

4.7 Transmitting data

4.7.1 Data transmission interval (Int 2)

4.7.3 Remote control

4.8 Configuration

4.9 Reset

5 Maintenance, cleaning, disposal

5.1 Maintenance

5.2 Cleaning

5.3 Disposal

6 What to do if...

6.1 pH system messages

6.2 Oxi system messages

6.3 General errors

7 Technical data

8Lists