Xylem handylab pH 12 User Manual

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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+ 47 hidden pages