Xylem handylab pH LF 12 User Manual

Operating manual

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handylab pH/LF 12

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pH/Conductivity Pocket Meter

Cond 330i/340i

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.

Copyright

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

2

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handylab pH/LF 12 List of contents

handylab pH/LF 12 - List of contents

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

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

1.2 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.3 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.4 Jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.5 Operating structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.6 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.1 Switching on the measuring instrument . . . . . . . . . . . . . . . . . 17

4.2 pH value / ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.2.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.2.2 Measuring the pH value . . . . . . . . . . . . . . . . . . . . . . . 20

4.2.3 Measuring the ORP voltage . . . . . . . . . . . . . . . . . . . . 22

4.3 pH calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.3.1 AutoCal TEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.3.2 AutoCal DIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.3.3 ConCal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.4 Conductivity/Salinity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.4.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.4.2 Measuring the conductivity . . . . . . . . . . . . . . . . . . . . . 37

4.4.3 Measuring the salinity . . . . . . . . . . . . . . . . . . . . . . . . . 37

4.4.4 AutoRead AR (drift control) . . . . . . . . . . . . . . . . . . . . 38

4.4.5 Determining the cell constant (Calibration in the

control standard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

4.4.6 Setting the temperature compensation . . . . . . . . . . . 42

4.5 Calibration intervals (Int 3, Int 5) . . . . . . . . . . . . . . . . . . . . . . 46

4.6 Saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.6.1 Saving manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.6.2 Switching on AutoStore (Int 1) . . . . . . . . . . . . . . . . . . 49

4.6.3 Outputting the data storage . . . . . . . . . . . . . . . . . . . . 51

4.6.4 Clearing the memory . . . . . . . . . . . . . . . . . . . . . . . . . 56

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List of contents handylab pH/LF 12

4.7 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

4.7.1 Data transmission interval (Int 2) . . . . . . . . . . . . . . . . 57

4.7.2 PC/external printer (RS232 interface) . . . . . . . . . . . . . 58

4.7.3 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

4.8 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

4.9 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . . . . . 65

5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

6.1 pH system messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

6.2 Conductivity system messages . . . . . . . . . . . . . . . . . . . . . . . . 69

6.3 General errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

7 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

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handylab pH/LF 12 Overview

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1 Overview

1.1 General features

This compact precision handheld meter enables you to carry out pH / ORP measurements and conductivity 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 or the proven procedure for adjusting or setting the cell constant and the special AutoRead function support you in your work with the handheld meter.

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1 Keypad

2 Sample display

3 Jack field

5

Overview handylab pH/LF 12

M

CAL

STO

RUN/ENTER

AR

RCL

M

STO

CAL

RCL

AR

RUN/ENTER

1.2 Keypad

Key functions

Select the measured variable <M>: – pH value / ORP voltage

– Conductivity / salinity

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 <▲ >

6

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

Confirm entries, start AutoRead

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handylab pH/LF 12 Overview

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AutoCal DIN AutoCal TEC

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Status display

Meas. value display

Function and temperature display

Probe symbol

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1.3 Display

1.4 Jack field

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1 Conductivity measuring cell

2 pH electrode

3 pH temperature probe

4 Plug-in power supply (optional)

5 Serial interface RS 232

7

Overview handylab pH/LF 12

1.5 Operating structure

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

Note

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

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handylab pH/LF 12 Overview

1.6 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

annual average < 90 %

humidity

pH/ORP measur-

ing ranges

Precision of

pH/ORP

(± 1 digit)

pH correction

function

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

T [°C] ± 0.1

Temperature input

Manually [°C] - 20 ... + 130

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Overview handylab pH/LF 12

Measuring ranges

of conductivity

ӕ [µS/cm] 0 ... 1999 1

Measuring range Resolution

Precision of

conductivity (± 1

digit)

ӕ [mS/cm] 0.00 ... 19.99

0.0 ... 199.9 0 ... 500

SAL 0.0 ... 70.0 accord-

0.01

0.1 1

0.1

ing to the IOT table

T [°C] − 5.0 ... + 105.0 0.1

ӕ Nonlinear compensation :

Precision Sample temperature ± 0.5 % 0 °C ... 35 °C

according to EN 27 888;

± 0.5 % 35 °C ... 50 °C

extended nLF function

Linear compensation Accuracy Sample temperature ± 0.5 % 10 °C ... 75 °C (The accuracy percentage always refers to the measured value.)

SAL Range 0.0 ... 42.0

Accuracy Sample temperature ± 0.1 5 °C ... 25 °C ± 0.2 25 °C ... 30 °C

Cell constant,

calibrating

Reference

temperature of

conductivity

T [°C] ± 0.1

C [cm-1] 0.450 ... 0.500

Tref Can be set to 20 °C or 25 °C

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handylab pH/LF 12 Overview

Serial

interface

Power

supply

Automatic switchover if a PC or printer is connected.

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. 15 m

Batteries 4 x 1.5 V alkali-manganese batteries, Type

AA

Operational life approx. 3000 operating hours

Mains 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.

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Overview handylab pH/LF 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.

Applicable

guidelines and

norms

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/LF 12 Safety

2Safety

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 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 The individual chapters of this operating manual use the following safety la-

bels 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 conductivity and salinity in the field and laboratory.

The technical specifications as given in section 1.6 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/LF 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 1.6 T

DATA).

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 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.

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/LF 12 Commissioning

3 Commissioning

3.1 Scope of delivery

z handylab pH/LF 12LF 12 handheld meter

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 (optional)

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 a measuring mode.

15

Commissioning handylab pH/LF 12

2

1

3

Connecting the

original

plug-in power sup-

ply 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 section 1.6 T

ECHNICAL DATA).

Warning

Use original plug-in power supplies only (see section 1.6 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.

16

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handylab pH/LF 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. 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)

Conductivity measuring cell 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 pro-

gram are connected,

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

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Operation handylab pH/LF 12

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 probe.

3 Calibrate or check the measuring instrument with the elec-

trode.

4 Using <▲ > <▼>, 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 probe.

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.

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handylab pH/LF 12 Operation

Temperature

measurement in

pH measurements

You can perform pH measurements with or without a temperature probe as well as with the temperature probe of a conductivity measuring cell. 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 probe Display Mode

pH Cond

yes - TP Automatic with

pH temperature probe

yes yes TP

- - Manual

-yesTP flashes

The temperature value of the 2nd sensor (Cond) 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 probe.

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

Note

When calibrating without a temperature probe (no TP display indicator displayed), enter the current temperature of the respective buffer solution manually using the <▲> <▼> keys while keeping the <RUN/ENTER> key depressed.

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19

Operation handylab pH/LF 12

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Tref25 nLF

AutoCal TEC

RCL

Auto

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TP

pH

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.

AutoRead AR

(drift control)

4 When measuring without a connected temperature probe:

Options: z Determine the current temperature using a thermometer

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

z TP display indicator not displayed, socket for the second

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

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

20

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).

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handylab pH/LF 12 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>.

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21

Operation handylab pH/LF 12

/pH

Tref20

Cal

8

TDS

S

8

1

pH

SalO

%

mg/l

1/

cm

Sal

AutoCal DIN

Lin

Tref25 nLF

AutoCal TEC

RCL

Auto

Store

LoBat

ARng

AR

Time

Baud

Day.Month No.

Ident

Year

mbar

cm

M

°

F

/

K

%

S/

m

cm

8

4

2

3

°

C

TP

U

mV

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 (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.

Note

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

22

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handylab pH/LF 12 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 SI Analytics technical buffer solutions as a fully

automatic two-point calibration. The buffer solutions are automatically rec- ognized by the measuring instrument. Depending on the instrument setting (see section 4.8 C 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 relevant buffer

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

cordance 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).

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, which is used as a high-speed method.

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

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

Displaying the

calibration data

Printing the

calibration

record

You can view the data of the last calibration on the display. The proceeding is described on page 53.

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 55).

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Operation handylab pH/LF 12

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 10.01 C1 184.1 mV 25.0°C C2 3.0 mV 25.0°C S1 -59.4 mV/pH ASY1 - 4 mV

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

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

24

Clean the electrode according to the electrode operating manual

E3

Eliminate the error according to chapter 6 W

HAT TO DO IF...

< -30 or > 30

< -62 or > -50

ba75370e03 11/2009

handylab pH/LF 12 Operation

Preparatory

activities

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 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 probe (the TP display indicator is missing from the display).

4.3.1 AutoCal TEC

For this procedure, use any two 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 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 4.8 C

ONFIGURATION),

the instrument displays the relevant buffer 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 probe or the temperature probe of a conductivity measuring cell.

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).

ba75370e03 11/2009

25

Operation handylab pH/LF 12

/pH

mV

TDS

OU

Tref20

Cal

8

S

1

Sal

%

mg/l

1/

cm

Sal

AutoCal DIN

Lin

Tref25 nLF

RCL

Auto

Store

LoBat

ARng

AR

Time

Baud

Day.Month No.

Ident

Year

mbar

cm

M

°

F

/

K

%

S/

m

cm

8

4

2

t

1

°

C

TP

pH

C

AutoCal TEC

cm

3

7

°

F

0

Cal

Tref20

Lin

0

Cal

Tref25

ARng

AutoCal DIN

Tref25

Auto

AutoCal DIN

ARng

Tref20

Lin

F

cm

1/1/

cm

AR

RCL

OO UpHUpH SalSal

Store

Auto

LoBat

nLF

SalSal

%%

mg/lmg/l

mV/pHmV/pH

cm

°

mm

S/S/

cmcm

%%

//

KK

MM

TDSTDS

11

SS

mbarmbar

Time

Baud

Day.Month No.

Ident

Year

Time

Baud

Day.Month No.

Ident

Year

0

03

7

pHpH

C

°

C

°

AutoCal TEC

ARAR

mV

88

44

22

TP

/pH

mV

TDS

OU

Tref20

Cal

8

S

1

Sal

%

mg/l

1/

cm

Sal

AutoCal DIN

Lin

Tref25 nLF

RCL

Auto

Store

LoBat

ARng

AR

Time

Baud

Day.Month No.

Ident

Year

mbar

cm

M

°

F

/

K

%

S/

m

cm

8

4

2

t

2

°

C

TP

pH

C

AutoCal TEC

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:

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

26

6 Thoroughly rinse the electrode with deionized water.

ba75370e03 11/2009

handylab pH/LF 12 Operation

1

TDS

S

°

F

0

Cal

Tref20

Lin

0

Cal

Tref25

ARng

AutoCal DIN

Tref25

Auto

AutoCal DIN

ARng

Tref20

Lin

F

cm

1/1/

cm

AR

RCL

OO UpHUpH SalSal

Store

Auto

LoBat

nLF

SalSal

%%

mg/lmg/l

mV/pHmV/pH

cmcm

°

mm

S/S/

cmcm

%%

//

KK

MM

TDS

1

S

mbarmbar

Time

Baud

Day.Month No.

Ident

Year

Time

Baud

Day.Month No.

Ident

Year

88

44

08

14

4

pHpH

C

°

C

°

AutoCal TEC

ARAR

mV

1

22

TP

O

L

S

RCL

Sal

cm

AutoCal DIN

Day.Month

S

Tref20

Cal

Ident

No.

Year

Time

Baud

1

TDS

Sal

Store

AR

Tref25

cm

C

/

%

K

TP

°

M

mbar

1/

%

m

mg/l

cm

S/

Lin

OU

nLF

Auto

LoBat

ARng

°

F

9

4

pH

5

mV/pH

AutoCal TEC

YA

S

0

RCL

Sal

cm

AutoCal DIN

Time

Day.Month

Sal

Store

AR

8

No.

Ident

Tref20

Tref25

Year

Baud

cm

C

/

%

K

TP

°

M

mbar

1/

%

m

mg/l

cm

S/

TDS

6

Lin

Cal

1

S

OU

nLF

Auto

LoBat

ARng

°

F

2

pH

mV

AutoCal TEC

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:

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.

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

(mV) appears on the display.

ba75370e03 11/2009

27

Operation handylab pH/LF 12

12 Switch to the measuring mode with <M>.

28

ba75370e03 11/2009

handylab pH/LF 12 Operation

AutoCal TEC

/pH

mV

TDS

OU

Tref20

Cal

8

S

1

Sal

%

mg/l

1/

cm

Sal

Lin

Tref25 nLF

RCL

Auto

Store

LoBat

ARng

AR

Time

Baud

Day.Month No.

Ident

Year

mbar

cm

M

°

F

/

K

%

S/

m

cm

8

4

2

d

1

°

C

TP

pH

C

AutoCal DIN

AutoCal TEC

°

F

0

Cal

Tref20

Lin

0

Cal

Tref25

ARng

Tref25

Auto

ARng

Tref20

Lin

F

cm

1/1/

cm

AR

RCL

OO UpHUpH SalSal

Store

Auto

LoBat

nLF

SalSal

%%

mg/lmg/l

mV/pHmV/pH

cmcm

°

mm

S/S/

cmcm

%%

//

KK

MM

TDSTDS

11

SS

mbarmbar

Time

Baud

Day.Month No.

Ident

Year

Time

Baud

Day.Month No.

Ident

Year

0

17

4

pHpH

C

°

C

°

ARAR

mV

88

44

22

TP

7

1

AutoCal DIN

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 probe or the temperature probe of a conductivity measuring cell.

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).

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:

5 When the measured value is stable, Cd2 appears.

ba75370e03 11/2009

29

Operation handylab pH/LF 12

AutoCal TEC

/pH

mV

TDS

OU

Tref20

Cal

8

S

1

Sal

%

mg/l

1/

cm

Sal

Lin

Tref25 nLF

RCL

Auto

Store

LoBat

ARng

AR

Time

Baud

Day.Month No.

Ident

Year

mbar

cm

M

°

F

/

K

%

S/

m

cm

8

4

2

d

2

°

C

TP

pH

C

AutoCal DIN

AutoCal TEC

°

F

0

Cal

Tref20

Lin

0

Cal

Tref25

ARng

Tref25

Auto

ARng

Tref20

Lin

F

cm

1/1/

cm

AR

RCL

OO UpHUpH SalSal

Store

Auto

LoBat

nLF

SalSal

%%

mg/lmg/l

mV/pHmV/pH

cmcm

°

mm

S/S/

cmcm

%%

//

KK

MM

TDSTDS

11

SS

mbarmbar

Time

Baud

Day.Month No.

Ident

Year

Time

Baud

Day.Month No.

Ident

Year

1

89

9

pHpH

C

°

C

°

ARAR

mV

88

44

22

TP

2

1

AutoCal DIN AutoCal DIN

Note

At this point, the AutoCal DIN calibration can be terminated with <M>. 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.

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:

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.

30

ba75370e03 11/2009

handylab pH/LF 12 Operation

O

L

S

RCL

Sal

cm

AutoCal DIN

Day.Month

S

Tref20

Cal

Ident

No.

Year

Time

Baud

1

TDS

Sal

Store

AR

Tref25

cm

C

/

%

K

TP

°

M

mbar

1/

%

m

mg/l

cm

S/

Lin

OU

nLF

Auto

LoBat

ARng

°

F

9

4

pH

5

mV/pH

AutoCal TEC

YA

S

0

RCL

Sal

cm

Time

Day.Month

Sal

Store

AR

8

No.

Ident

Tref20

Tref25

Year

Baud

cm

C

/

%

K

TP

°

M

mbar

1/

%

m

mg/l

cm

S/

TDS

6

Lin

Cal

1

S

OU

nLF

Auto

LoBat

ARng

°

F

2

pH

mV

AutoCal DIN

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

(mV) appears on the display.

12 Switch to the measuring mode with <M>.

ba75370e03 11/2009

31

Operation handylab pH/LF 12

/

K

cm

Sal

1

S

OU

8

°

F

%

1/

cm

mV/pH

S/

m

cm

M

%

mg/l

mbar

Lin

Tref25 nLF

Time

Baud

Day.Month No.

Ident

Year

LoBat

AutoCal DIN AutoCal TEC

RCL

Auto

Store

ARng

AR

TDS

Sal

Tref20

8

4

2

S

Y

A

pH

Cal

°

C

TP

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 9 if you use a pH electrode with a temperature probe or the temperature probe of a conductivity measuring cell.

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).

32

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

key. The value of the asymmetry appears.

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

ba75370e03 11/2009

handylab pH/LF 12 Operation

/

K

cm

Sal

1

S

OU

8

°

F

%

1/

cm

mV/pH

S/

m

cm

M

%

mg/l

mbar

Lin

Tref25 nLF

Time

Baud

Day.Month No.

Ident

Year

LoBat

AutoCal DIN AutoCal TEC

RCL

Auto

Store

ARng

AR

TDS

Sal

Tref20

8

4

2

L

O

S

pH

Cal

°

C

TP

AutoCal TEC

O

L

S

RCL

Sal

cm

AutoCal DIN

Day.Month

S

Tref20

Ident

No.

Year

Time

Baud

1

TDS

Sal

Store

AR

Tref25

cm

C

/

%

K

°

M

mbar

1/

%

m

mg/l

cm

S/

Lin

OU

nLF

Auto

LoBat

ARng

°

F

9

2

pH

5

mV/pH

Cal

TP

8 Thoroughly rinse the electrode with deionized water.

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

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

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

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.

ba75370e03 11/2009

33

Operation handylab pH/LF 12

Lin

AutoCal DIN AutoCal TEC

YA

S

0

RCL

Sal

cm

Time

Day.Month

Sal

Store

AR

8

No.

Ident

Tref20

Tref25

Year

Baud

cm

C

/

%

K

TP

°

M

mbar

1/

%

m

mg/l

cm

S/

TDS

6

1

S

OU

nLF

Auto

LoBat

ARng

°

F

3

pH

mV

Cal

15 Switch to the measuring mode with <M>.

34

ba75370e03 11/2009

handylab pH/LF 12 Operation

4.4 Conductivity/Salinity

4.4.1 General information

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.

Preparatory

activities

Temperature probe Only carry out measurements with a temperature probe. The temperature

Temperature

compensation

Reference

temperature, Tref

Perform the following preparatory activities when you want to measure:

1 Connect a conductivity measuring cell to the measuring instru-

ment. The instrument automatically switches over to conductivity measurement (status display If the conductivity measuring cell is already connected, press the <M> key repeatedly until the status display pears.

2 Check the selected cell constant (see below) or calibrate the

measuring instrument with the measuring cell (see section 4.4.5).

3 Using <▲ > <▼>, toggle between the measuring modes, con-

ductivity (

probe is shown on the display by TP.

Selectable linear or nonlinear temperature compensation, can be switched off (see section 4.8 C

The reference temperature (Tref) can be switched between 20 °C and 25 °C. It appears on the display as Tref20 or Tref25. To switch over the reference temperature, see S

ӕ in μS/cm) or salinity (SAL).

ONFIGURATION).

WITCHING OVER THE REFERENCE TEMPERATURE, page 61.

ӕ or SAL).

ӕ or SAL ap-

ba75370e03 11/2009

35

Operation handylab pH/LF 12

OUpH Sal

Store

AR

Auto

AutoCal DIN AutoCal TEC

LoBat

Cal

ARng

Tref25

Tref20

Lin

nLF

Sal

%

mg/l

mV/pH

cm

°

TP

m

S/

cm

1/

F

C

%

/

K

M

TDS

1

S

mbar

Time

Baud

Day.Month No.

Ident

Year

P

dS

I

RCL

A

L

C

L

C

S

1

LoBat

Lin

nLF

Tref20

ARng

AR

°

TP

F

C

%

/

K

M

%

mg/l

mV/pH

m

S/

cm

Sal

TDS

Auto

Store

Sal

mbar

OUpH

cm

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

2

0 7

4

cm

1/

Tref25

RCL

C

Cal

Checking the cell

constant

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

display.

2 Press the <RUN/ENTER> repeatedly until the last calibrated

cell constant is displayed, e. g. 0.472 cm

-1

.

36

3 To return to the measuring mode: Press the <M> key when the

correct cell constant is displayed.

4 If you want to recalibrate the cell constant, proceed according

to section 4.4.5 D

IN THE CONTROL STANDARD).

ETERMINING THE CELL CONSTANT (CALIBRATION

ba75370e03 11/2009

handylab pH/LF 12 Operation

AR

8

1

cm

1/

/

K

%

°

F

RCL

Cal

Lin

Tref20

LoBat

M

m

Sal

TDS

S

Auto

Store

Sal

mbar

%

mg/l

OUpH

mV/pH

cm

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

0

4

2

3

0

5

°

TP

S/

cm

C

Tref25 nLF

ARng

Tref25

/

K

cm

1/

°

F

%

8

mg/l

1

RCL

ARng

AR

LoBat

Cal

Tref20

Lin

m

S/

cm

M

TDS

S

Auto

Store

Sal

mbar

%

OUpH

mV/pH

cm

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

2

1

2

3

°

TP

Sal

C

nLF

4.4.2 Measuring the conductivity

You can meaure the conductivity as follows:

1 Perform the preparatory activities according to section 4.4.1.

2 Immerse the conductivity measuring cell in the test sample.

3 Press the < ▲> <▼> keys until and the unit μS/cm appears

in the status display. The conductivity value appears on the display.

4.4.3 Measuring the salinity

You can measure the salinity as follows:

1 Perform the preparatory activities according to section 4.4.1.

2 Immerse the conductivity measuring cell in the test sample.

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

The salinity value appears on the display.

ba75370e03 11/2009

37

Operation handylab pH/LF 12

8

1

cm

1/

/

K

%

°

F

ARng

RCL

Cal

Lin

Tref20

LoBat

M

m

Sal

TDS

S

Auto

Store

Sal

mbar

%

mg/l

OUpH

mV/pH

cm

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

0

5

2

3

0

5

°

AR

TP

S/

cm

C

Tref25 nLF

4.4.4 AutoRead AR (drift control)

The AutoRead function (drift control) checks the stability of the measurement signal. The stability has a considerable effect on the reproducibility of the measured value.

1 Select the ӕ or SAL measuring mode with <M> and/or <▲ >

<▼>.

2 Immerse the conductivity measuring cell in the test sample.

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

sured value is frozen (hold function).

4 Start AutoRead with <RUN/ENTER>.

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

38

5 If necessary, start the next AutoRead measurement with

<RUN/ENTER>.

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

Note

The current AutoRead measurement can be terminated at any time (accepting the current value) by pressing <RUN/ENTER>. You can only change to another measuring mode after completion of AutoRead.

ba75370e03 11/2009

handylab pH/LF 12 Operation

CALIBRATION PROTOCOL

14.04.01 11:37 Device No.: 99990000 Calibration Conductivity Cal time: 14.04.01 / 11:37 Cal interval: 180d Cal Std.: 0.01 mol/l KCL

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

4.4.5 Determining the cell constant (Calibration in the control standard)

Why determine the

cell constant?

AutoRead The calibration procedure automatically activates the AutoRead function.

Displaying

calibration data

Printing the

calibration

protocol

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

In the delivery condition, the cell constant of the measuring instruments is set to 0.475 cm

-1

.

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

You can view the data of the last calibration on the display. The proceeding is described on page 53.

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 55).

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.

ba75370e03 11/2009

Sample printout:

39

Operation handylab pH/LF 12

AR

RCL

OO UpHUpH SalSal

Store

Auto

AutoCal DIN

AutoCal TEC

LoBat

ARng

Tref20

Lin

nLF

SalSal

%%

mg/lmg/l

mV/pHmV/pH

cmcm

°°

TP

mm

S/S/

cmcm

FF

CC

%%

//

KK

MM

TDSTDS

11

SS

mbarmbar

Time

Baud

Day.Month No.

Ident

Year

Time

Baud

Day.Month No.

Ident

Year

52

00 77

44

AA

LL

CC

cmcm

1/1/

Tref25

Cal

Calibration

evaluation

Determining the

cell constant

After the calibration, the measuring instrument automatically evaluates the current status of the calibration. The evaluation appears on the display.

Display Cell constant [cm

0.450 ... 0.500 cm

E3

Eliminate the error according to chapter 6 W

HAT TO DO IF...

Outside the range

0.450 ... 0.500 cm

-1

]

-1

You can determine the cell constant as follows:

1 Press the <CAL> key repeatedly until the ӕ and CELL status

displays appear.

2 Press the <RUN/ENTER> key. The CAL display appears, as

well as – the current, calibrated cell constant (with sensor symbol on

the display) or

– the fixed cell constant 0.475 1/cm (without sensor symbol

on the display). In this case, the measurement parameters are initialized. See “Reset” on page 62.

40

3 Immerse the conductivity measuring cell in the control standard

solution, 0.01 mol/l KCI.

4 Press the <RUN/ENTER> key.

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

ba75370e03 11/2009

handylab pH/LF 12 Operation

S

1

LoBat

Lin

nLF

Tref20

RCL

ARng

AR

°

TP

F

C

%

/

K

M

%

mg/l

mV/pH

m

S/

cm

Sal

TDS

Auto

Store

Sal

mbar

OUpH

cm

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

3

0 7

4

Cal

cm

1/

Tref25

A

L

C

AR

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

termined cell constant is taken over for the measurement.

Note

If the error message E3 appears, refer to chapter 6 W

HAT TO DO IF...

ba75370e03 11/2009

41

Operation handylab pH/LF 12

4.4.6 Setting the temperature compensation

The calculation of the temperature compensation is based on the preset reference temperature, Tref 20 or Tref 25 (see section 4.8 C

ONFIGURATION).

You can select one of the following temperature compensations:

z Nonlinear temperature compensation (nLF)

according to EN 27 888

z Linear temperature compensation (Lin) with adjustable coefficient in

the range 0.001 ... 3.000 %

/K

z No temperature compensation (----)

Note

ips Select the following temperature compensations given in the table according

to the respective test sample:

Application tips

Test sample Temperature compensation Display in-

dicator

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

nLF according to DIN 38404 EN 27 888

Ultrapure water nLF

according to DIN 38404 EN 27 888

4.5 Calibration intervals (Int 3, Int 5)

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)

Conductivity Int 5 180 days (d 180)

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 Int5 and

the required measured variable pH or appears. Example:

Designation Default setting

46

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>.

ba75370e03 11/2009

handylab pH/LF 12 Operation

%

OU

TP

°

C

7

1

m

Sal

mg/l

8

LoBat

Time

Baud

Day.Month

Ident

Year

Sal

mbar

1

S

RCL

AR

Auto

Cal

°

F

1/

cm

/

K

%

TDS

mV/pH

S/

cm

M

Lin

Tref25

Tref20

nLF

AutoCal DIN AutoCal TEC

4

9

6

ARng

No.

Store

pH

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 49).

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.

2 Confirm with <RUN/ENTER>.

The display switches to entering the ID number.

ba75370e03 11/2009

47

Operation handylab pH/LF 12

No.

ARng

%

OU

TP

°

C

7

1

m

Sal

mg/l

8

LoBat

Time

Baud

Day.Month

Year

Sal

mbar

1

S

RCL

AR

Auto

Cal

°

F

1/

cm

/

K

%

TDS

mV/pH

S/

cm

M

Lin

Tref25

Tref20

nLF

AutoCal DIN AutoCal TEC

2

9

6

Store

pH

Ident

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

(1 ... 999).

4 Confirm with <RUN/ENTER>.

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

Message StoFull This message appears when all of the 500 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 press any key

Outputting the data storage see

Clearing the memory see

Press

section 4.6.3

section 4.6.4

48

ba75370e03 11/2009

handylab pH/LF 12 Operation

LoBat

Tref25 nLF

/

K

%

RCL

Sal

°

AR

TP

C

M

m

%

mg/l

cm

S/

cm

S

8

cm

1/

°

F

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

F

O

t

1

n

1

Store

Auto

S

1

LoBat

Tref25 nLF

/

K

%

RCL

Sal

°

AR

TP

C

M

m

%

mg/l

cm

S/

cm

1/

°

F

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

e

r

9

4

Store

Auto

F

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.

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).

ba75370e03 11/2009

4 Confirm with <RUN/ENTER>.

The number of free memory locations appears on the display.

5 Confirm with <RUN/ENTER>.

The prompt for the ID number appears on the display.

49

Operation handylab pH/LF 12

e

r

F

9

S

1

LoBat

Tref25 nLF

/

K

%

RCL

Sal

°

AR

TP

C

M

m

%

mg/l

cm

S/

cm

1/

°

F

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Year

1

Store

Auto

Ident

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:

Switching off

AutoStore

z Output and backup the data storage (see page 51) and

z Clear the memory (see page 56).

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.

50

ba75370e03 11/2009

handylab pH/LF 12 Operation

ARng

ConCal

Store

Auto

0

No.

LoBat

Day.Month

Year

Ident

UpH

AR

%

°F

°C

TP

mV/pH

mol/L

TempError

AutoCal DIN

CalError

AutoCal TEC

Time

Baud

1

S

mg/L

% ppm

ISE

Os

T

pi

s

RCL

d

AR

Store

No.Day.Month

Year

Ident

ARng

%

OU

m

Sal

mg/l

8

LoBat

Time

Baud

Sal

mbar

1

S

Auto

Cal

°

F

1/

cm

/

K

%

TDS

mV/pH

S/

cm

M

Lin

Tref25

Tref20

nLF

AutoCal DIN AutoCal TEC

8

6

pH

RCL

TP

2

4

°

C

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.

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.

ba75370e03 11/2009

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 <▲>

51

Operation handylab pH/LF 12

d

ARng

ConCal

Store

Auto

0

No.

LoBat

Day.Month

Year

Ident

UpH

AR

%

°F

°C

TP

mV/pH

mol/L

TempError

AutoCal DIN

CalError

AutoCal TEC

Time

Baud

1

S

mg/L

% ppm

ISE

Os

T

RS

e

RCL

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).

2Press <▲> 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.

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.

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

52

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

ba75370e03 11/2009

handylab pH/LF 12 Operation

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

...

Store

Auto

Ident

S

1

LoBat

Tref25 nLF

/

K

%

Sal

°

AR

TP

C

M

m

%

mg/l

cm

S/

cm

1/

°

F

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Year

d

P

C

A

L

I

S

RCL

Sal

cm

AutoCal DIN

Day.Month

S

Tref20

Cal

Ident

No.

Year

Time

Baud

1

TDS

Sal

Store

AR

Tref25

cm

C

/

%

K

TP

°

M

mbar

1/

%

m

mg/l

cm

S/

Lin

OU

nLF

AutoCal TEC

Auto

LoBat

ARng

°

F

O

9

4

pH

L

S

RCL

5

mV/pH

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

z pH: Slope SLO and asymmetry ASY

z Conductivity: Cell constant C

Information concerning the calibration procedure is output as well.

ba75370e03 11/2009

53

Operation handylab pH/LF 12

Sal

cm

AutoCal DIN

Time

Day.Month

Sal

Store

AR

8

No.

Ident

Tref20

Tref25

Year

Baud

cm

C

/

%

K

TP

°

M

mbar

1/

%

m

mg/l

cm

S/

TDS

6

Lin

Cal

1

S

OU

nLF

AutoCal TEC

Auto

LoBat

ARng

°

F

Y

0

1

pH

mV

S

A

RCL

L

C

S

1

LoBat

Lin

nLF

Tref20

ARng

AR

°

TP

F

C

%

/

K

M

%

mg/l

mV/pH

m

S/

cm

Sal

TDS

Auto

Store

Sal

mbar

OUpH

cm

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

2

0 7

4

cm

1/

Tref25

RCL

C

Cal

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

(mV).

4 Press <RUN/ENTER> to display the cell constant. The dis-

played value is: z the current, calibrated cell constant (with sensor symbol on

the display) or

z the fixed cell constant 0.475 1/cm (without sensor symbol

on the display). In this case, the measuring parameters are initialized (see section 4.9 R

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

mode.

ESET).

54

ba75370e03 11/2009

handylab pH/LF 12 Operation

d

Store

Auto

Ident

S

1

LoBat

Tref25 nLF

/

K

%

Sal

°

AR

TP

C

M

m

%

mg/l

cm

S/

cm

1/

°

F

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Year

R

C

A

L

S

E

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 10.01 C1 174.1 mV 25.0°C C2 -133.3 mV 25.0°C S1 -59.4 mV/pH ASY1 - 4 mV Probe: +++

Calibration Conductivity Cal time: 14.12.00 / 11:37 Cal interval: 180d Cal Std.: 0.01 mol/l KCL

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

Outputting the

calibration

protocol on the

interface

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

display.

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:

ba75370e03 11/2009

55

Operation handylab pH/LF 12

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.

56

ba75370e03 11/2009

handylab pH/LF 12 Operation

Store

Auto

LoBat

Tref25 nLF

/

K

%

RCL

Sal

°

AR

TP

C

M

m

%

mg/l

cm

S/

cm

S

8

cm

1/

°

F

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

OUpH

mV/pH

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Ident

Year

F

O

t

2

n

1

4.7 Transmitting data

You have the following possibilities of transmitting data:

z One of the following options:

– With the AutoStore function (page 49), 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 51), 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.

ba75370e03 11/2009

3 Set the required interval between the saving procedures with

<▲> <▼>.

4 Confirm with <RUN/ENTER>.

The measuring instrument switches to the last active measuring mode.

57

Operation handylab pH/LF 12

1 CTS 2 RxD 3 Ground 4TxD

4

Note

When the AutoStore function is active at the same time, the data transmis- sion 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).

4.7.2 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.

Warning

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

Socket

assignment

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

2

1

3

RS 232

REC

4.7.3 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.

58

ba75370e03 11/2009

handylab pH/LF 12 Operation

Day.Month No.

Time

1

2

M

m

%

mg/l

cm

S/

cm

S

mbar

mV/pH

t

n

Store

Auto

LoBat

Tref25 nLF

/

K

%

RCL

Sal

°

AR

TP

C

cm

1/

°

F

ARng

Cal

Lin

Tref20

Sal

TDS

OUpH

AutoCal DIN AutoCal TEC

Ident

Year

0

8

4

Baud

4.8 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

Display during the pH calibration

Intervals Calibration (Int 3) in days (d)

Reference temperature – 25 °C (TREF25) t25

Date/time Any

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

– pH: 1 ... 7 ... 999 d Int 3

– : 1 ... 180 ... 999 d Int 5

– 20 °C (TREF20) t20

Baudrate

ba75370e03 11/2009

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

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

play.

59

Operation handylab pH/LF 12

RCL

mV/pH

O

Store

Auto

Ident

S

1

LoBat

Tref25 nLF

/

K

%

Sal

°

AR

TP

C

M

m

%

mg/l

cm

S/

cm

1/

°

F

ARng

Cal

Lin

Tref20

Sal

TDS

mbar

AutoCal DIN AutoCal TEC

Time

Baud

Day.Month No.

Year

p

C

A

L

i

sd

pH

/pH

1

OU

°

C

1

TP

ARng

mg/l

LoBat

Baud

Day.Month No.

Ident

Year

Sal

%

mbar

S

RCL

AR

Store

Auto

°

F

1/

cm

/

K

%

TDS

Sal

mV/pH

S/

m

cm

M

Lin

Tref25

Tref20

nLF

AutoCal DIN AutoCal TEC

8

t

3

n

1

d

Time

Cal

pH

O

°

C

TP

ARng

mg/l

LoBat

Baud

Day.Month No.

Ident

Year

Sal

%

mbar

S

RCL

AR

Store

Auto

°

F

1/

cm

/

K

%

TDS

UpH Sal

mV/pH

S/

m

cm

M

Lin

Tref25

Tref20

nLF

AutoCal DIN AutoCal TEC

0

8

t

5

n

1

d

Time

Cal

1

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>. On the display, Int 3 appears.

Calibration

intervals pH

60

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

9 Confirm with <RUN/ENTER>. Int 5 and the measured variable

appears on the display.

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

11 Confirm with <RUN/ENTER>. The reference temperature set

for conductivity measurements appears on the display.

ba75370e03 11/2009

handylab pH/LF 12 Operation

RCL

AR

ARng

Sal

/

K

%

TP

C

°

F

cm

1/

M

cm

mbar

S

E

Y

SalO

Store

1

S

m

%

mg/l

S/

cm

mV/pH

Baud

4

Day.Month No.

Time

Auto

LoBat

nLF

Cal

Lin

Tref20

TDS

UpH

AutoCal DIN AutoCal TEC

Ident

Year

5

2

t

Tref25

S

1

M

m

%

mg/l

cm

S/

cm

mbar

mV/pH

D

i

s

Store

Auto

Ident

LoBat

Tref25 nLF

/

K

%

Sal

°

AR

TP

C

cm

1/

°

F

ARng

Cal

Lin

Tref20

Sal

TDS

OUpH

AutoCal DIN AutoCal TEC

Time

Baud

No.

Year

4

0

9

0

Day.Month

Switching over the

reference

temperature

12 Using <▲> <▼>, toggle between t20 and t25.

13 Confirm with <RUN/ENTER>.

The date flashes on the display.

Date and time

ba75370e03 11/2009

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

15 Confirm with <RUN/ENTER>.

The date (month) flashes on the display.

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

17 Confirm with <RUN/ENTER>.

The year appears on the display.

18 Set the current year with <▲> <▼>.

19 Confirm with <RUN/ENTER>.

The hours flash on the display.

20 Set the current time with <▲> <▼>.

21 Confirm with <RUN/ENTER>.

The minutes flash on the display.

22 Set the current time with <▲> <▼>.

23 Confirm with <RUN/ENTER>.

The measuring instrument switches to the last active measuring mode.

61

Operation handylab pH/LF 12

4.9 Reset

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

Measurement

parameters

pH

Conductivity

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 ӕ

Cell constant 0.475 cm-1 (calibrated)

0.475 cm

-1

(set up)

Temperature compensation nLF

Reference temperature

Temperature coefficient of the lin-

2.000 %/K

ear temperature compensation

Configuration

parameters

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

Display during the

Buffer nominal value

pH calibration

Interval 1 (automatic save) OFF

Interval 2 (for data transmission) OFF

62

ba75370e03 11/2009

handylab pH/LF 12 Operation

O

ARng

Y

Sal

/

K

%

TP

C

°

F

Store

cm

1/

1

S

M

m

%

mg/l

cm

S/

cm

mV/pH

mbar

Baud

4

Day.Month No.

Time

Auto

LoBat

Tref25 nLF

RCL

AR

Cal

Lin

Tref20

TDS

AutoCal DIN AutoCal TEC

Ident

Year

o

n

I

n

I

pH

OpH

Tref25

Tref20

AutoCal TEC

RCL

LoBat

Cal

ARng

AR

Lin

nLF

Store

Sal

°

TP

cm

1/

F

C

%

/

K

8

1

S/

cm

m

M

TDS

Sal

S

Auto

mbar

%

mg/l

mV/pH

cm

AutoCal DIN

Time

Baud

Day.Month No.

Ident

Year

o

n

I

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.

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

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

4 Confirm with <RUN/ENTER>.

The measuring instrument switches to the setting to reset the conductivity measuring parameters.

ba75370e03 11/2009

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

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

6 Confirm with <RUN/ENTER>.

The measuring instrument switches to the configuration parameters.

63

Operation handylab pH/LF 12

OpH

Tref25

Tref20

AutoCal TEC

RCL

LoBat

Cal

ARng

AR

Lin

nLF

Store

Sal

°

TP

cm

1/

F

C

%

/

K

8

1

S/

cm

m

M

TDS

Sal

S

Auto

mbar

%

mg/l

mV/pH

cm

AutoCal DIN

Time

Baud

Day.Month No.

Ident

Year

o

n

I

Resetting the configuration

parameters

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

YES: Resetting the configuration parameters no: Retaining settings.

8 Confirm with <RUN/ENTER>.

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

64

ba75370e03 11/2009

handylab pH/LF 12 Maintenance, cleaning, disposal

1

2

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-

Warning

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

ba75370e03 11/2009

compartment. Only use leakproof alkaline manganese batteries.

tery compartment.

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

partment.

4 Close the lower cover (1).

± signs on the batteries must correspond to the ± signs in the battery

65

Maintenance, cleaning, disposal handylab pH/LF 12

Note

For maintenance of electrodes and measuring cells, 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.

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 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.

66

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handylab pH/LF 12 What to do if...

6 What to do if...

6.1 pH system messages

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

ba75370e03 11/2009

– Electrode broken – Replace electrode

Measuring instrument:

– Incorrect calibration procedure – Select correct procedure

– Incorrect solution temperature

– Set up correct temperature

(without temperature probe)

– Socket damp – Dry socket

67

What to do if... handylab pH/LF 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:

Obviously incor-

rect measured val-

ues

– 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

68

– Measurement procedure not

suitable

– Follow special procedure

ba75370e03 11/2009

handylab pH/LF 12 What to do if...

6.2 Conductivity system messages

Error message OFL

Error message E3

Cause Remedy

The measured value lies outside the measuring range

– Measuring cell not connected – Connect measuring cell

– Cable broken – Replace measuring cell

Cause Remedy

– Measuring cell contaminated – Clean cell and replace it if

necessary

Display LoBat

Instrument does

not react

to keystroke

Display to

– Unsuitable calibration

– Check calibration solutions

solution

6.3 General errors

Cause Remedy

– Batteries almost empty – Exchange the batteries (see

section 5.1 M

Cause Remedy

– Operating condition undefined

or EMC load unallowed

– Processor reset:

Switch the instrument on while pressing the <CAL> key

Cause Remedy

AINTENANCE)

Probe symbol

flashes

ba75370e03 11/2009

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

connected

Cause Remedy

– Calibration interval expired – Recalibrate the measuring

system

69

What to do if... handylab pH/LF 12

Message StoFull

Cause Remedy

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

data storage

70

ba75370e03 11/2009

handylab pH/LF 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.

ba75370e03 11/2009

71

Lists handylab pH/LF 12

Abbreviations

Conductivity value (international γ)

AR AutoRead (drift control)

ARng Automatic range switching

Measuring instrument measures with highest resolution

ASY Asymmetry

AutoCal DIN Automatic pH calibration with buffer solutions pre-

pared according to DIN 19266

AutoCal TEC Automatic pH calibration with SI Analytics techni-

cal buffer solutions according to DIN 19267

-1

C Cell constant [cm

] (internat. k)

°C Temperature unit, degrees Celsius

Cal Calibration

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 SI Analytics 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

Lin Linear temperature compensation

LoBat Batteries almost empty(Low Battery)

mV Voltage unit

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

nLF Nonlinear temperature compensation

72

OFL Display range exceeded (Overflow)

pH pH value

S Slope (internat. k)

SAL Salinity

SELV Safety Extra Low Voltage

ba75370e03 11/2009

handylab pH/LF 12 Lists

SLO Slope setting on calibration

TC Temperature coefficient (internat. α)

TP Temperature measurement active (Temperature

Probe)

20/T20 Reference temperature of 20 °C

T

Ref

25/T25 Reference temperature of 25 °C

T

Ref

U

ASY

Asymmetry

ba75370e03 11/2009

73

Lists handylab pH/LF 12

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).

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

the geometry.

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

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

Conductometry Name of the conductivity measuring technique.

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).

74

ba75370e03 11/2009

handylab pH/LF 12 Lists

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

®

Name stating that a measuring instrument provides several calibration 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).

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.

Reference

temperature

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

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

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

the reciprocal value of the electrical conductivity.

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

played by a measuring instrument.

Salinity The absolute salinity S

of seawater corresponds to the relationship

A

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

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

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.

Temperature

Value of the slope of a linear temperature function.

coefficient

ba75370e03 11/2009

75

Lists handylab pH/LF 12

Temperature

compensation

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

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

ior of a test sample, a 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.

76

ba75370e03 11/2009

Cond 330i/340i Index

Index

A

Asymmetry 23 Authorized use 13 AutoCal DIN 23, 29 AutoCal TEC 23, 25 AutoRead 20, 38

C

Calibration evaluation 24, 40 Calibration interval 46 Calibration procedures 23 Calibration protocol

Conductivity

Calibration protocol (340i) 23 Cell constant 36, 39 ConCal 23, 32 Conductivity 37 Connecting a printer 58 Connecting the original plugin power supply unit

39

16

D

Data record 47 Data transmission (interval)

57

Delivery status 62 Display 7 Displaying calibration data

39

Drift control 20, 38

K

Keys 6

L

Linear

Temperature compensa-

tion

42

temperature compensa-

tion

43

M

Measuring 35 Measuring mode when switching on Measuring ranges

pH/ORP

17

9

N

Nonlinear

Temperature compensa-

tion

42

temperature compensa-

tion

43

O

Operating 8 Operating safety 14 ORP electrode 22 ORP voltage 22

S

Safety 13 safety precautions 13 Salinity 37 Save interval 49 Scope of delivery 15 Setting the baud rate 59 Setting the date 15, 61 Setting the reference temperature

61

Setting the time 15, 61 single-point calibration 23 Single-point calibration (pH)

23, 26, 30, 32

Slope 23

T

Temperature compensation

42, 45

linear 42 nonlinear 42

Temperature compensation (conductivity) Temperature probe

Conductivity pH 19

Two-point calibration

ConCal

two-point calibration 23 Two-point calibration (pH)

23, 26, 30, 32

35

32

E

Energy saving feature 17 Error messages 69

I

Initial commissioning 15 Initialization 62 Interval

calibration data transmission 57 save 49

ba75370e03 11/2009

46

P

Printing

calibration protocol

23

R

Reference temperature (conductivity) Remote control 58 Replacing the batteries 65 Reset 62 Resetting the measuring parameters RS232 interface 58

35

63

77

Index Cond 330i/340i

78

ba75370e03 11/2009

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 LF 12 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Overview

1.1 General features

1.2 Keypad

1.3 Display

1.4 Jack field

1.5 Operating structure

1.6 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 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 Conductivity/Salinity

4.4.1 General information

4.4.2 Measuring the conductivity

4.4.3 Measuring the salinity

4.4.4 AutoRead AR (drift control)

4.4.5 Determining the cell constant (Calibration in the control standard)

4.4.6 Setting the temperature compensation

4.5 Calibration intervals (Int 3, Int 5)

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)

4.7.2 PC/external printer (RS232 interface)

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 Conductivity system messages

6.3 General errors

7Lists