Xylem handylab pH 12 User Manual

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Operating manual

RCL

STO

handylab pH 12

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pH Pocket Meter

handylab LF 12

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.

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

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handylab pH 12 List of contents

handylab pH 12 - List of contents

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

1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.3 Jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.4 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

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 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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

4.2.2 Measuring the pH value . . . . . . . . . . . . . . . . . . . . . . . 17

4.2.3 Measuring the ORP voltage . . . . . . . . . . . . . . . . . . . . 19

4.3 Calibrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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

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

4.3.3 ConCal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.4 Saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.4.1 Saving manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.4.2 Saving automatically . . . . . . . . . . . . . . . . . . . . . . . . . 36

4.4.3 Outputting the data storage . . . . . . . . . . . . . . . . . . . . 38

4.4.4 Clearing the memory . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.5 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.5.1 Data transmission interval (Int 2) . . . . . . . . . . . . . . . . 44

4.5.2 Recorder (analog output) . . . . . . . . . . . . . . . . . . . . . . 46

4.5.3 PC/external printer (RS232 interface) . . . . . . . . . . . . 47

4.5.4 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.6 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

4.7 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

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5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . . . . . 53

5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

List of contents handylab pH 12

6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

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handylab pH 12 Overview

RCL

STO

1 Overview

The compact precision handheld meter handylab pH 12 enables you to carry out pH measurements rapidly and reliably. The handylab pH 12 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications.

The proven calibration procedures and the special AutoRead function support you in your work with the handylab pH 12.

1 Keypad

2 Sample display

3 Jack field

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Overview handylab pH 12

CAL

RUN/ENTER

STO

RCL

STO

CAL

RCL

RUN/ENTER

1.1 Keypad

Key functions

Select the measuring mode <M>: –pH value

–ORP voltage

Save a measured value

<STO>

Switch measuring instrument on/off

Calibration of the current 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

<▼ >

Confirm entries, start AutoRead

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handylab pH 12 Overview

°F

Tem pEr ro r

mg/L

% ppm

mol/L

ISE

RCL

mV/pH

°C

LoBat

AutoCal DIN

CalError

ARng

AutoCal TEC

UpH

Time

Baud

Day.Month No.

Ident

Year

Auto

Store

ConCal

Status display

Meas. value display

Function and temperature display

Sensor symbol

123

1.2 Display

1.3 Jack field

The meter has either a DIN socket or a BNC socket. The figure shows a meter with DIN socket (1).

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1 pH electrode or single-rod measuring electrode

2 Reference electrode

3 Plug-in power supply (optional)

4 Temperature probe

5 Serial interface RS 232 / analog output (recorder)

Caution

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

Overview handylab pH 12

1.4 Technical Data

Dimensions

and weight

Mechanical

structure

Electrical safety

Test certificates

Ambient

conditions

Length [mm] 172

Width [mm] 80

Height [mm] 37

Weight [kg] Approx. 0.3

Type of protection IP 66

Protective class III

cETLus, CE

Storage - 25 °C ... + 65 °C

Operation -10 °C ... + 55 °C

Relative atmospheric

< 90 % of annual average

humidity

pH/ORP

measuring ranges

Precision of

pH/ORP

(± 1 digit)

Measuring range Resolution

pH - 2.000 ... + 19.999

- 2.00 ... + 19.99

U [mV] - 999.9 ... + 999.9

- 1999 ... + 1999

0.001

0.01

0.1 1

T [°C] - 5.0 ... + 105.0 0.1

pH (± 2 pH units from the

± 0.005 at + 15 °C ... + 35 °C ± 0.01

calibration point)

U [mV] ± 0.3 at + 15 °C ... + 35 °C

± 1

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handylab pH 12 Overview

T [°C] NTC 30:

Accuracy ± 0.1

PT 1000: Accuracy Operating temperature ± 0.5 0 °C ... 15 °C ± 0.1 15 °C ... 35 °C ± 1 35 °C ... 55 °C

Correction

function

Temperature input

Manually [°C] - 20 ... + 130

Analog output Automatic switchover if a recorder is connected.

Output signal Corresponds to the electrode voltage,

i.e. 50-62 mV/pH unit

Accuracy ± 0.1 % of the measured value ± 4 mV

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

output current)

Serial interface Automatic switchover if a PC or printer is connected.

Type RS232, data output

Baud rate Can be set to

1200, 2400, 4800, 9600 Baud

Data bits 8

Stop bit 2

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Parity None

Handshake RTS/CTS + Xon/Xoff

Cable length Max. 15 m

Overview handylab pH 12

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.

Power supply

Applicable

guidelines and

norms

Batteries 4 x 1.5 V alkali-manganese batteries, Type

Operational life Approx. 5000 operating hours

Mains operation FRIWO FW7555M/09, 15.1432.500-00

Friwo Part. No. 1883259 Input: 100 ... 240 V ~ / 50 ... 60 Hz / 400 mA Output: 9 V = / 1.5 A Connection max. overvoltage category II Primary plugs contained in the scope of delivery: Euro, US, UK and Australian.

EMC EC guideline 2004/108/EC

EN 61326-1 EN 61000-3-2 EN 61000-3-3 FCC Class A

Instrument safety EC guideline 2006/95/EC

EN 61010-1 ANSI/UL 61010-1 CAN/CSA-C22.2 No. 61010-1

Climatic class VDI/VDE 3540

Type of protection EN 60529

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handylab pH 12 Safety

2Safety

This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the pH meter. 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 lab-

oratory. 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:

Caution

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 pH and ORP measurement in the field and laboratory. The technical specifications as given in section 1.4 T 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 be

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Safety handylab pH 12

2.2 General safety instructions

This instrument is built and inspected according to the relevant guidelines and norms for electronic measuring instruments (see section 1.4 T D

ATA).

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

ECHNICAL

Function and oper-

ating safety

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 section 1.4 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.

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

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

z has been damaged in transport

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

z is visibly damaged

Obligations of the

purchaser

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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handylab pH 12 Commissioning

3 Commissioning

3.1 Scope of delivery

z Handheld meter, handylab pH 12

z Operating manual and short operating manual

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

3.2 Initial commissioning

Perform the following activities:

z Set the date and time

z Connect the plug-in power supply.

Setting 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 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.

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.

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12 Set the current time with <▲> <▼>.

13 Confirm with <RUN/ENTER>.

The instrument switches to the pH measuring mode.

Commissioning handylab pH 12

Ref

Connecting the

plug-in power sup-

ply (option)

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 V DC). This saves the batteries.

Caution

The line voltage at the operating site must lie within the input voltage range of the original plug-in power supply (see section 1.4 T

ECHNICAL DATA).

Caution

Use original plug-in power supplies only (see section 1.4 T

ECHNICAL DATA).

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

ment.

2 Connect the original SI Analytics plug-in power supply (3) to an

easily accessible mains socket.

Note

You can also measure without the plug-in power supply.

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handylab pH 12 Operation

4 Operation

4.1 Switching on the measuring instrument

1 Press the <ON/OFF> key.

The display test appears briefly on the display. Subsequently, the slope and asymmetry used appear for approx. one second one after the other. In addition, the calibration procedure of the last calibration is shown (AutoCal TEC or AutoCal DIN or no display in the delivery state or following initialization). 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 pro-

gram are connected,

z if the recorder cable is connected,

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

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Operation handylab pH 12

4.2 Measuring

4.2.1 General information

You can measure the following variables:

z pH value

z ORP voltage

Preparatory

activities

Perform the following preparatory activities when you want to measure:

1 Connect the electrode to the measuring instrument.

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

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

3 In conjunction with the electrode, check or calibrate the mea-

suring instument. How to calibrate is described in section 4.3.

4 Select the measuring mode with <M>.

Caution

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

Note

Incorrect calibration of pH electrodes leads to incorrect measured values. Calibrate regularly before measuring.

Temperature

sensor

You can measure with or without a temperature sensor. If a temperature sensor is connected, it is indicated on the display by TP.

Note

The measuring instrument automatically recognizes the type of the temperature sensor used. Therefore, you can connect temperature sensors of the NTC30 or Pt1000 type.

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handylab pH 12 Operation

mV/pH

mol/L

Auto

Store

TempError

RCL

LoBat

AutoCal DIN

CalError

ARng

AutoCal TEC

ConCal

Time

Baud

Day.Month No.

Ident

Year

°F

mg/L

% ppm

ISE

°C

The temperature measurement is absolutely essential for a reproducible pH measurement. If the measurement is made 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 <▲ > <▼>.

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.

Setting the

resolution

3 Press the <M> key until pH appears on the status display. The

pH value appears on the display.

The measuring instrument shows the pH value with a resolution of 0.01 or

0.001. (Default setting is 0.01). To change the resolution, press the <M> key while pressing the <RUN/ENTER> key.

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Operation handylab pH 12

AutoRead

(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).

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>.

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handylab pH 12 Operation

/pH

ConCal

Auto

Store

LoBat

AutoCal DIN

CalError

ARng

AutoCal TEC

°F

Time

Baud

Day.Month No.

Ident

Year

RCL

TempError

mg/L

% ppm

mol/L

ISE

°C

4.2.3 Measuring the ORP voltage

In conjunction with an ORP electrode, e.g. BlueLine 31Rx, the measuring instrument can measure the ORP voltage (U) of a solution.

1 Perform the preparatory activities according to section 4.2.1.

2 Immerse the ORP electrode in the test sample.

3 Press the <M> key until U appears on the status display.

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

4 Wait for a stable measured value.

Note

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

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Operation handylab pH 12

4.3 Calibrating

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

Calibration interval The calibration interval (Int 3) is set to 7 days in the factory. You can select

the interval in the range of 1 ... 999 days (see section 4.6 C

You can select between 3 calibration procedures:

ONFIGURATION).

AutoCal TEC is specially adapted to the SI Analytics technical buffer solutions as a fully au-

tomatic two-point or three-point calibration. The buffer solutions are auto- matically recognized by the measuring instrument. Depending on the instrument setting (see section 4.6 C

ONFIGURATION), the instrument displays

the 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. For this, the instrument uses the Nernst slope (-59.2 mV/pH at 25 °C) and determines the asymmetry of the electrode.

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

cordance with DIN19266 as a fully automatic two-point or three-point cali- bration. The buffer solutions are automatically recognized by the measuring instrument. Depending on the instrument setting (see section

4.6 C

ONFIGURATION), the instrument displays the relevant buffer nominal val-

ue or the current electrode voltage in mV. The calibration can be terminated after the first buffer solution. This corresponds to a single-point calibration. For this, the instrument uses the Nernst slope (-59.2 mV/pH at 25 °C) and determines the asymmetry of the electrode.

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

tions (pH 7.0 ± 0.5 and any other buffer solution) or a single-point calibra-

tion using any buffer solution and is used as a high-speed method.

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

Displaying

calibration data

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

Each time the instrument is switched on, the calibration data are shown on the display for a short time (see section 4.1 S

STRUMENT). In order to view the calibration data, switch the measuring instru-

WITCHING ON THE MEASURING IN-

ment off and switch it on again.

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handylab pH 12 Operation

CALIBRATION PROTOCOL

02.03.99 14:19 Device No.: 12345678 Calibration pH Cal time: 01.03.99 / 15:20 Cal interval: 7d AutoCal DIN Tauto Buffer 1 1.679 Buffer 2 4.008 Buffer 3 6.865 Buffer 4 9.180 * C1 174.1 mV 25.0°C C2 -133.3 mV 25.0°C S1 -59.4 mV/pH ASY1 - 4 mV Probe: +++

Printing the

calibration

record

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 42).

Note

You can automatically print a calibration protocol after the calibration. To do so, connect a printer to the interface according to section 4.5.3 before calibrating. After a valid calibration, the record is printed.

Sample printout:

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Operation handylab pH 12

Calibration

evaluation

After the calibration, the measuring instrument automatically evaluates the current status of the electrode. 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

Preparatory

activities

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

1 Switch on the measuring instrument with <ON/OFF>.

2 Connect the pH electrode to the measuring instrument.

3 Keep the buffer solutions ready.

4 Adjust the temperature of the solutions and measure the cur-

rent temperature if the measurement is made without temperature sensor.

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handylab pH 12 Operation

mV/pH

mol/L

Auto

Store

RCL

LoBat

AutoCal DIN

CalError

ARng

ConCal

Time

Baud

Day.Month No.

Ident

Year

°F

TempError

mg/L

% ppm

ISE

°C

AutoCal TEC

4.3.1 AutoCal TEC

For this procedure, use any two or three technical buffer solutions in ascending or descending order (pH values at 25 °C: 2.00 / 4.01 / 7.00 / 10.01).

Note

The calibration for pH 10.01 is optimized for the SI Analytics technical buffer solution pH 10.01. Other buffer solutions can lead to an erroneous calibration. The correct buffer solutions are given in the SI Analytics catalog or in the Internet.

Note

The buffer solutions are automatically recognized by the measuring instrument. Depending on the instrument setting (see section 4.6 C the instrument displays the relevant buffer nominal value or the current electrode voltage in mV.

Note

Skip the steps 2, 7 and 14 if you use a temperature sensor.

ONFIGURATION),

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 parameter has been reset).

2 If necessary, enter the temperature of the first buffer solution

with <▲> <▼>.

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:

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Operation handylab pH 12

Cal

Tref20

Lin

Cal

Tref25

ARng

AutoCal DIN

Tref25

Auto

AutoCal DIN

ARng

Tref20

Lin

1/1/

RCL

OO UpHUpH SalSal

Store

Auto

LoBat

nLF

SalSal

mg/lmg/l

mV/pHmV/pH

S/S/

cmcm

TDSTDS

mbarmbar

Time

Baud

Day.Month No.

Ident

Year

Time

Baud

Day.Month No.

Ident

Year

pHpH

AutoCal TEC

ARAR

mV/pH

mol/L

Auto

Store

RCL

LoBat

AutoCal DIN

CalError

ARng

ConCal

Time

Baud

Day.Month No.

Ident

Year

°F

TempError

mg/L

% ppm

ISE

°C

AutoCal TEC

5 When the measured value is stable, Ct2 appears.

Note

At this point, the AutoCal TEC calibration can be terminated with <M>. This corresponds to a single-point calibration. For this, the instrument uses the Nernst slope (-59.2 mV/pH at 25 °C) and determines the asymmetry of the electrode.

6 To continue the two-point calibration, thoroughly rinse the

electrode with deionized water.

7 If necessary, enter the temperature of the second buffer solu-

tion with <▲> <▼>.

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:

ba75368e04 01/2011

handylab pH 12 Operation

TDS

Cal

Tref20

Lin

Cal

Tref25

ARng

AutoCal DIN

Tref25

Auto

AutoCal DIN

ARng

Tref20

Lin

1/1/

RCL

OO UpHUpH SalSal

Store

Auto

LoBat

nLF

SalSal

mg/lmg/l

mV/pHmV/pH

cmcm

S/S/

cmcm

TDS

mbarmbar

Time

Baud

Day.Month No.

Ident

Year

Time

Baud

Day.Month No.

Ident

Year

pHpH

AutoCal TEC

ARAR

RCL

Sal

AutoCal DIN

Day.Month

Tref20

Cal

Ident

No.

Year

Time

Baud

TDS

Sal

Store

Tref25

mbar

mg/l

Lin

nLF

Auto

LoBat

ARng

mV/pH

AutoCal TEC

RCL

Sal

AutoCal DIN

Time

Day.Month

Sal

Store

No.

Ident

Tref20

Tref25

Year

Baud

mbar

mg/l

TDS

Lin

Cal

nLF

Auto

LoBat

ARng

AutoCal TEC

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

strument displays the value of the slope (mV/pH) and the evaluation of the calibration in calibration range I.

ba75368e04 01/2011

11 Press the <RUN/ENTER> key. The instrument displays the

value of the asymmetry in calibration range I.

Note

At this point, the AutoCal TEC calibration can be terminated with <M>. This corresponds to a two-point calibration. The instrument uses the slope and asymmetry of the calibration range I.

Operation handylab pH 12

Three-point

calibration

12 Press the <RUN/ENTER> key

to continue the three-point calibration. Ct3 appears on the display.

13 Thoroughly rinse the electrode with distilled water.

14 If necessary, enter the temperature of the third buffer solution

with <▲> <▼>.

15 Immerse the pH electrode in the third buffer solution.

16 Press the <RUN/ENTER> key.

The AR display indicator flashes. The electrode voltage (mV) or the buffer nominal value appears on the display. When the measured value is stable, AR disappears. The instrument displays the value of the slope (mV/pH) and the evaluation of the calibration in calibration range II.

17 Press the <RUN/ENTER> key.

The instrument displays the value of the asymmetry in calibration range II. The three-point calibration is completed.

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

Note

You can prematurely terminate the three-point calibration by pressing <M>. The values of the two-point calibration for slope and asymmetry will then remain stored.

ba75368e04 01/2011

handylab pH 12 Operation

AutoCal TEC

mV/pH

mol/L

Auto

Store

RCL

LoBat

CalError

ARng

ConCal

Time

Baud

Day.Month No.

Ident

Year

°F

TempError

mg/L

% ppm

ISE

°C

AutoCal DIN

4.3.2 AutoCal DIN

For this procedure, use two or three different standard buffer solutions according to DIN 19266 in ascending or descending order (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, 7 and 14 if you use a temperature sensor.

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).

ONFIGURATION),

ba75368e04 01/2011

2 If necessary, enter the temperature of the buffer solution with

<▲> <▼>.

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:

Operation handylab pH 12

AutoCal TEC

Cal

Tref20

Lin

Cal

Tref25

ARng

Tref25

Auto

ARng

Tref20

Lin

1/1/

RCL

OO UpHUpH SalSal

Store

Auto

LoBat

nLF

SalSal

mg/lmg/l

mV/pHmV/pH

cmcm

S/S/

cmcm

TDSTDS

mbarmbar

Time

Baud

Day.Month No.

Ident

Year

Time

Baud

Day.Month No.

Ident

Year

pHpH

ARAR

AutoCal DIN

AutoCal TEC

mV/pH

mol/L

Auto

Store

RCL

LoBat

CalError

ARng

ConCal

Time

Baud

Day.Month No.

Ident

Year

°F

TempError

mg/L

% ppm

ISE

°C

AutoCal DIN

5 When the measured value is stable, Cd2 appears.

Note

At this point, the AutoCal DIN calibration can be terminated with <M>. This corresponds to a single-point calibration. For this, the instrument uses the Nernst slope (-59.2 mV/pH at 25 °C) and determines the asymmetry of the electrode.

6 To continue the two-point calibration, thoroughly rinse the

electrode with deionized water.

7 If necessary, enter the temperature of the second buffer solu-

tion with <▲> <▼>.

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:

ba75368e04 01/2011

handylab pH 12 Operation

AutoCal TEC

Cal

Tref20

Lin

Cal

Tref25

ARng

Tref25

Auto

ARng

Tref20

Lin

1/1/

RCL

OO UpHUpH SalSal

Store

Auto

LoBat

nLF

SalSal

mg/lmg/l

mV/pHmV/pH

cmcm

S/S/

cmcm

TDSTDS

mbarmbar

Time

Baud

Day.Month No.

Ident

Year

Time

Baud

Day.Month No.

Ident

Year

pHpH

ARAR

AutoCal DIN

AutoCal TEC

RCL

Sal

Time

Day.Month

Sal

Store

No.

Ident

Tref20

Tref25

Year

Baud

mbar

mg/l

TDS

Lin

Cal

nLF

Auto

LoBat

ARng

AutoCal DIN

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

strument displays the value of the slope (mV/pH) and the evaluation of the calibration in calibration range I.

ba75368e04 01/2011

11 Press the <RUN/ENTER> key. The instrument displays the

value of the asymmetry in calibration range I.

Note

At this point, the AutoCal DIN calibration can be terminated with <M>. This corresponds to a two-point calibration. The instrument uses the slope and asymmetry of the calibration range I.

Operation handylab pH 12

Three-point

calibration

12 Press the <RUN/ENTER> key

to continue the three-point calibration. Cd3 appears on the display.

13 Thoroughly rinse the electrode with distilled water.

14 If necessary, enter the temperature of the third buffer solution

with <▲> <▼>.

15 Immerse the pH electrode in the third buffer solution.

16 Press the <RUN/ENTER> key.

17 Press the <RUN/ENTER> key.

The instrument displays the value of the asymmetry in calibration range II. The three-point calibration is completed.

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

Note

You can prematurely terminate the three-point calibration by pressing <M>. The values of the two-point calibration for slope and asymmetry will then remain stored.

ba75368e04 01/2011

handylab pH 12 Operation

4.3.3 ConCal

Single-point

calibration

Two-point

calibration

Use any buffer solution for this rapid method. The calibration will be the more exact the nearer the pH value of the buffer solution is to that of the test sample.

For this procedure, use two buffer solutions:

z pH 7.0 ± 0.5

z any other buffer solution

Note

Skip the steps 2 and 9 if you use a pH electrode with a temperature sensor.

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

function display ConCal 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).

ba75368e04 01/2011

2 If necessary, enter the temperature of the first buffer solution

with <▲> <▼>.

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

0.5 in two-point calibration).

4 Press the <RUN/ENTER> key.

The measured pH value appears on the display.

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

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

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

(mV) and the sensor symbol appear on the display.

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

Note

At this point, the ConCal calibration can be broken off with <M>. This corresponds to a single-point calibration. For this, the instrument uses the Nernst slope (-59.2 mV/pH at 25 °C) and the specified asymmetry of the electrode.

Operation handylab pH 12

AutoCal DIN

AutoCal TEC

mV/pH

mol/L

Auto

Store

RCL

LoBat

CalError

ARng

Time

Baud

Day.Month No.

Ident

Year

°F

TempError

mg/L

% ppm

ISE

°C

ConCal

8 To continue the two-point calibration, thoroughly rinse the

electrode with deionized water.

9 If necessary, enter the temperature of the second buffer solu-

tion with <▲> <▼>.

10 Immerse the pH electrode in the second buffer solution.

11 Press the <RUN/ENTER> key. The second pH value appears

on the display.

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

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

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.

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

(mV) appears on the display.

ba75368e04 01/2011

handylab pH 12 Operation

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

ba75368e04 01/2011

Operation handylab pH 12

Ident

°C

mV/pH

mol/L

Auto

TempError

RCL

LoBat

AutoCal DIN

CalError

ARng

AutoCal TEC

ConCal

Time

Baud

Day.Month

Year

°F

mg/L

% ppm

ISE

Store

No.

4.4 Saving

The measuring instrument has an internal data memory. It can store up to 800 data records. 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).

4.4.1 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.

2 Confirm with <RUN/ENTER>.

The display switches to entering the ID number.

ba75368e04 01/2011

handylab pH 12 Operation

No.

°C

mV/pH

mol/L

Auto

TempError

RCL

LoBat

AutoCal DIN

CalError

ARng

AutoCal TEC

ConCal

Time

Baud

Day.Month

Year

°F

mg/L

% ppm

ISE

Store

Ident

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

(1 ... 999).

4 Confirm with <RUN/ENTER>.

The instrument changes to the measuring mode.

Message StoFull This message appears when all of the 800 storage locations are occupied.

You have the following options:

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

Returning to the measuring mode without saving

Outputting the data storage see

Clearing the memory see

Press <RUN/ENTER>.

press any key

section 4.4.3

section 4.4.4

ba75368e04 01/2011

Operation handylab pH 12

LoBat

Tref25 nLF

RCL

Sal

mg/l

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

Store

Auto

4.4.2 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.

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.

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.

5 As soon as all of the 800 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 38) and

– clear the memory (see page 43).

ba75368e04 01/2011

handylab pH 12 Operation

LoBat

Tref25 nLF

RCL

Sal

mg/l

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Year

Store

Auto

Ident

6 Confirm with <RUN/ENTER>.

The prompt for the ID number appears on the display.

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

8 Confirm with <RUN/ENTER>.

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

Switching off

AutoStore

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.

Switch AutoStore off by:

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

z switching the measuring instrument off and then on again.

ba75368e04 01/2011

Operation handylab pH 12

Store

Auto

Ident

LoBat

Tref25 nLF

Sal

mg/l

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Year

RCL

mV/pH

mol/L

Auto

Store

TempError

LoBat

AutoCal DIN

CalError

ARng

AutoCal TEC

ConCal

Time

Baud

Day.Month No.

Ident

Year

°F

mg/L

% ppm

ISE

°C

RCL

4.4.3 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.

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.

You can perform the following activities:

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

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

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

Press <RUN/ENTER>.

ba75368e04 01/2011

handylab pH 12 Operation

Store

Auto

Ident

LoBat

Tref25 nLF

Sal

mg/l

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Year

RCL

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).

2Press <▲> 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.

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 pH measuring mode.

Note

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

ba75368e04 01/2011

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

Operation handylab pH 12

Device No.: 12345678

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 mV Tauto Ident : 13

...

ARng

ConCal

Store

Auto

No.

LoBat

Day.Month

Year

Ident

UpH

°F °C

mV/pH

mol/L

TempError

AutoCal DIN

CalError

AutoCal TEC

Time

Baud

mg/L

% ppm

ISE

RCL

°C

ConCal

AutoCal DIN

mol/L

Auto

Store

LoBat

CalError

ARng

Time

Baud

Day.Month No.

Ident

Year

°F

TempError

mg/L

% ppm

ISE

AutoCal TEC

mV/pH

RCL

Sample printout:

Outputting the

calibration data

on the display

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

the display.

2 Press the <RUN/ENTER> key.

The slope (mV/pH) in the calibration range I and the calibration procedure of the last calibration appear on the display

ba75368e04 01/2011

handylab pH 12 Operation

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

(mV) in the calibration range I.

4 In two-point calibration:

Using <M> or <RUN/ENTER>, you can switch back to the pH measuring mode. In three-point calibration: Press <RUN/ENTER> to display the slope [mV/pH] in the calibration range II (SLO2).

ba75368e04 01/2011

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

(mV) in the calibration range II (ASY2).

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

measuring mode.

Operation handylab pH 12

ARng

ConCal

Store

Auto

No.

LoBat

Day.Month

Year

Ident

UpH

°F °C

mV/pH

mol/L

TempError

AutoCal DIN

CalError

AutoCal TEC

Time

Baud

mg/L

% ppm

ISE

RCL

Outputting the

calibration

protocol on the

interface

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

play.

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 last active measuring mode.

Note

You will find a sample calibration protocol in P

CORD, page 21.

RINTING THE CALIBRATION RE-

ba75368e04 01/2011

handylab pH 12 Operation

RCL

Auto

Ident

LoBat

Tref25 nLF

Sal

mg/l

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Year

Store

4.4.4 Clearing the memory

With this function, you can delete stored data records. 800 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.

ba75368e04 01/2011

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.

Operation handylab pH 12

4.5 Transmitting data

You have the following possibilities of transmitting data:

z One of the following options:

– With the AutoStore function (page 36), 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 38), calibration data or saved

measured values are output on the interface.

z Via the analog recorder output (page 46), measured values are output as

voltage values.

z With a communication kit (accessory), data can be transmitted bidirection-

ally (page 47).

Note

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

4.5.1 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.

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).

ba75368e04 01/2011

handylab pH 12 Operation

Store

Auto

LoBat

Tref25 nLF

RCL

Sal

mg/l

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

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.

3 Set the required interval between the saving procedures with

<▲> <▼>.

4 Confirm with <RUN/ENTER>.

The measuring instrument automatically switches to the pHmeasuring mode.

ba75368e04 01/2011

Operation handylab pH 12

1 free 2 Plug coding 3 Ground 4 Analog output

(internal resistance < 5 Ohm)

4.5.2 Recorder (analog output)

You can transmit data to a recorder via the analog output. Connect the analog output to the recorder via the Z 394 interface cable. The data output automatically switches to Recorder output.

Socket

assignment

RS 232

REC

Note

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

At the analog output, there is a low-impedance electrode signal (corresponding to 50 ... 62 mV/pH).

ba75368e04 01/2011

handylab pH 12 Operation

1 CTS 2 RxD 3 Ground 4TxD

4.5.3 PC/external printer (RS232 interface)

Via the RS 232 interface, you can transmit the data to a PC or an external printer. Use the Z 395 (PC) or Z 391 (ext. printer) cable to connect the interface to the instruments. The data output automatically switches to the RS232 interface.

Caution

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 on the PC/printer:

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

Handshake RTS/CTS + Xon/Xoff

Parity none

Socket

assignment

Data bits 8

Stop bits 1

RS 232

REC

4.5.4 Remote control

The handheld meter can be remotely controlled from a PC. This requires a communication kit (communication cable + communication program) which is available upon request. 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.

ba75368e04 01/2011

Operation handylab pH 12

Day.Month No.

Time

mg/l

mbar

mV/pH

Store

Auto

LoBat

Tref25 nLF

RCL

Sal

ARng

Cal

Lin

Tref20

Sal

TDS

OUpH

AutoCal DIN AutoCal TEC

Ident

Year

Baud

4.6 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

Baud rate

Display during the pH calibration

Calibration interval (Int 3) 1 ... 7 ... 999 d

Date/time Any

pH resolution 0.01 or 0.001

Note

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

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

5 Confirm with <RUN/ENTER>.

CAL diSP appears on the display.

ba75368e04 01/2011

handylab pH 12 Operation

°C

mV/pH

mol/L

Auto

Store

RCL

LoBat

CalError

ARng

Baud

Day.Month No.

Ident

Year

°F

TempError

mg/L

% ppm

ISE

Time

AutoCal DIN

AutoCal TEC

ConCal

mg/l

mbar

mV/pH

Store

Auto

Ident

LoBat

Tref25 nLF

Sal

ARng

Cal

Lin

Tref20

Sal

TDS

OUpH

AutoCal DIN AutoCal TEC

Time

Baud

No.

Year

Day.Month

Display during the

pH calibration

6 Select the required display during the pH calibration with

<▲> <▼>.

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

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

Calibration interval

Date and time

8 Set the required interval in days with <▲> <▼>.

9 Confirm with <RUN/ENTER>.

The date flashes on the display.

ba75368e04 01/2011

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

Operation handylab pH 12

11 Confirm with <RUN/ENTER>.

The date (month) flashes in the display.

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

13 Confirm with <RUN/ENTER>.

The year appears on the display.

14 Set the current year with <▲> <▼>.

15 Confirm with <RUN/ENTER>.

The hours flash on the display.

16 Set the current time with <▲> <▼>.

17 Confirm with <RUN/ENTER>.

The minutes flash on the display.

18 Set the current time with <▲> <▼>.

19 Confirm with <RUN/ENTER>.

The measuring instrument automatically switches to the pH measuring mode.

Setting the

resolution

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

2 Press the <M> key.

The measured values are displayed with a high resolution, e.g. pH = 4.012.

3 Press the <RUN/ENTER> and <M> keys once more.

The measured values are displayed with a low resolution, e.g. pH = 4.01.

ba75368e04 01/2011

handylab pH 12 Operation

4.7 Reset

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

Measurement

parameters

Configuration

parameters

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

Measuring mode pH

Asymmetry 0 mV

Slope -59.16 mV/pH

Calibration procedures AutoCal TEC

Temperature, manual 25 °C

Resolution (pH display) 0.01 (low resolution)

Display during the

Buffer nominal value

pH calibration

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

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Interval 1 (automatic save) OFF

Interval 2 (for data transmission) OFF

Operation handylab pH 12

Tref25

Tref20

AutoCal TEC

RCL

LoBat

Cal

ARng

Lin

nLF

Store

Sal

TDS

Sal

Auto

mbar

mg/l

mV/pH

AutoCal DIN

Time

Baud

Day.Month No.

Ident

Year

OUpH

ARng

Sal

Store

mg/l

mV/pH

mbar

Baud

Day.Month No.

Time

Auto

LoBat

Tref25 nLF

RCL

Cal

Lin

Tref20

TDS

AutoCal DIN

AutoCal TEC

Ident

Year

Resetting the

measuring

parameters

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

2 Press the <CAL> key.

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.

Resetting the configuration

parameters

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 pH measuring mode.

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handylab pH 12 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 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).

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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).

Caution

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 battery

compartment. Only use leakproof alkaline manganese batteries.

Maintenance, cleaning, disposal handylab pH 12

Note

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

5.2 Cleaning

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

Caution

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 Republic

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

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handylab pH 12 What to do if...

6 What to do if...

Error message 0FL

Cause Remedy

pH electrode:

– Not connected – Connect electrode

Error message E3

– 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

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– 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

What to do if... handylab pH 12

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 mea-

Cause Remedy

sured value

pH electrode:

– Diaphragm contaminated – Clean diaphragm

– Membrane contaminated – Clean membrane

Test sample:

LoBat display

– 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

– Batteries almost empty – Replace batteries

(see section 5.1 MAINTENANCE)

ba75368e04 01/2011

handylab pH 12 What to do if...

Obviously incor-

rect

measured values

Instrument does

not react to key-

stroke

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

– Follow special procedure

suitable

Cause Remedy

– Operating condition

undefined or EMC load unallowed

– Processor reset:

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

Display to

Probe symbol

flashes

Message StoFull

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

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What to do if... handylab pH 12

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handylab pH 12 Lists

7Lists

This chapter provides additional information and orientation aids.

Abbreviations The list of abbreviations explains the indicators and the abbreviations that ap-

pear on the display and in the manual.

Specialist terms The glossary briefly explains the meaning of the specialist terms. However,

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

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

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Lists handylab pH 12

Abbreviations

AR AutoRead (drift control)

ARng Automatic range switching

Measuring instrument measures with highest resolution

ASY Asymmetry

AutoCal DIN Automatic pH calibration with buffer solutions prepared

according to DIN 19 266

AutoCal TEC Automatic pH calibration with SI Analytics technical buf-

fer solutions according to DIN 19267

°C Temperature unit, degrees Celsius

Cal Calibration

Cd... Display indicator during calibration for pH measure-

ments. Indicates the selection of the buffer data record for buffer solutions prepared according to DIN 19 266

ConCal Conventional single-point or two-point calibration for pH

measurements

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

ments. Indicates the selection of the buffer data records for SI Analytics technical buffer solutions

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)

pH pH value

S Slope (internat. k)

SELV Safety Extra Low Voltage

SLO Slope setting on calibration

TP Temperature measurement active (Temperature Probe)

ASY

Asymmetry

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handylab pH 12 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.

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 (electrodes: pH = 7).

AutoRange Name of the automatic selection of the measuring range.

AutoRead 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).

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.

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-

MultiCal

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vent.

Name stating that a measuring instrument provides several calibration procedures.

Lists handylab pH 12

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).

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 hydrogen 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 electrical current remains constant.

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.

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.

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.

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handylab LF 12 Index

Index

Analog output 46 Asymmetry 20 Authorized use 11 AutoCal DIN 20, 27 AutoCal TEC 20, 23 AutoRead 17

Calibration evaluation 22 Calibration procedures 20 Calibration protocol 21 ConCal 20, 31 Connecting a printer 47 Connecting the plug-in power supply

Data record 34 Data transmission (interval)

Default condition 51 Display 7 Displaying calibration data

Drift control 17

Energy saving feature 15

Initial commissioning 13 Initialization 51 Interval

data transmission save 36

Keys 6

LoBat 56

Measuring ranges

pH/ORP

Operating safety 12 ORP electrode 19 ORP voltage 19

Printing

calibration protocol

Remote control 47 Replacing the batteries 53 Reset 51 RS232 interface 47

Safety 11 Safety precautions 11 Save interval 36 Scope of delivery 13 Setting the baud rate 48 Setting the date 13, 49 Setting the resolution 50 Setting the resolution (pH) 17 Setting the time 13, 49 Single-point calibration 20 Single-point calibration (pH)

24, 25, 28, 29, 31

Slope 20

Temperature sensor 16 Three-point calibration 20

AutoCal DIN 30 AutoCal TEC 26

Two-point calibration 20

ConCal 31

Two-point calibration (pH)

20, 24, 25, 28, 29, 31

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Index handylab LF 12

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SI Analytics GmbH Postfach 2443 D-55014 Mainz Hattenbergstr. 10 D-55122 Mainz

Telefon +49 (0) 61 31/66 5111 Telefax +49 (0) 61 31/66 5001 Email: support@

si-analytics.com

Internet: www.si-analytics.com

Xylem handylab pH 12 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Overview

1.1 Keypad

1.2 Display

1.3 Jack field

1.4 Technical Data

2Safety

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 Measuring

4.2.1 General information

4.2.2 Measuring the pH value

4.2.3 Measuring the ORP voltage

4.3 Calibrating

4.3.1 AutoCal TEC

4.3.2 AutoCal DIN

4.3.3 ConCal

4.4 Saving

4.4.1 Saving manually

4.4.2 Saving automatically

4.4.3 Outputting the data storage

4.4.4 Clearing the memory

4.5 Transmitting data

4.5.1 Data transmission interval (Int 2)

4.5.2 Recorder (analog output)

4.5.3 PC/external printer (RS232 interface)

4.5.4 Remote control

4.6 Configuration

4.7 Reset

5 Maintenance, cleaning, disposal

5.1 Maintenance

5.2 Cleaning

5.3 Disposal

6 What to do if...

7Lists