ELMETRON CP-411 Bedienungsanleitung

WATERPROOF

pH-METER

CP-411

USERS MANUAL

Sp. j.

41-814 Zabrze, ul. Witosa 10, POLAND

tel. +48 32 / 273 8106, tel./fax +48 32 / 2738114

www.elmetron.com.pl

e-mail: [email protected]

WATERPROOF

pH-METER

CP-411

USERS MANUAL

Before use, please read this instruction carefully!



Users manual CP-411 pH meter

W A R R A N T Y

The “ELMETRON” company gives 24 months of

warranty for the CP-411 pH-meter

number.........................................

In case of damage the producer will repair the meter

within 14 days from the day of delivery.

The warranty doesn’t cover the damages caused by

usage not in conformity with the users manual, using

wrong power adapter, mechanical damages and

damages caused by repairs made by unauthorised

persons.

NOTICE: Before sending the meter to us please contact the

firm by phone.

When sending the meter, the used electrode, temperature

probe and power adapter should be also included.

Date of production...........................

Date of sale.....................................

Date of expiry..................................

Sp. j.

41-814 Zabrze - Grzybowice ul. Witosa 10

tel. (+48) 32 2738106, fax (+48) 32 2738114

POLAND



Users manual CP-411 pH meter

CONTENTS

1. Exploitation notices 2

2. The characteristics of the pH-meter CP-411 3

3. What is the meter designed for? 4

4. Outside view 5

5. Switching the meter ON and OFF 7

6. Preparation to work 8

7. Preparation of the pH electrode 9

8. Calibration of the pH electrode 10

8.1 Calibration with automatic temperature compens. 11

8.2 Calibration with manual temperature compens. 12

9. pH Measurement 13

9.1 Measurement with automatic temp. compensation 13

9.2 Measurement with manual temp. compensation 14

10. Notices about the temp. compensation and

interpretation of the pH measurement results 15

11. Temperature measurement 18

12. Freezing the result on the display 18

13. Power source and changing the battery 19

14. Equipment 19

15. Technical Data 20



Users manual CP-411 pH meter

- 21 - - 2 -

1. EXPLOITATION NOTICES

Dear User!

We present you a device distinguished by accuracy according

to the technical data and by a high stability of the displayed

results. We believe that the measurements will not cause you

any trouble and that the pH-meter will operate without any

inconvenience. Before starting the measurements please

read this manual carefully in other case using the meter

may cause you a troubles.

The employing of good-quality electrodes and their replacing

after a suitable time ensures obtaining of high measuring

parameters. We want to call your attention to the fact, that

electrodes have a much shorter working life than the pH-meter.

During the operation the electrodes have a major impact on the

measurement quality. Typical symptoms of an improper

operation of the electrode are deterioration of final result

stability, its flowing as well as a higher measuring error. Part of

the users has problems, arising from employing electrodes

not being preconditioned before the measurement or

making the measurements without removing the shielding

ring from the liquid junction or taking measurements with

a plugged junction. This situation can take place in case of

using electrode improper for the measured solution, ex.

Standard electrode for the sewage or liquids with deposits

measurements. Such measurements require using special

electrode for sewage, the situation is similar with meat, cheese,

soil etc. The application of an improper electrode can make the

measurement difficult or impossible, even after a very short

time. Therefore, if you observe improper operation of the device,

please take control measurements with another electrode or

check the used electrode with another pH-meter. Generally the

deterioration of pH-meter work is caused by the electrode

and not by the pH-meter.

The essential feature of our products is their low failure

frequency. However if your pH-meter will fail, our firm

immediately performs its warranty repair.

We wish to you a pleasant and trouble-free work with our meter.



Users manual CP-411 pH meter

- 3 - - 20 -

2. THE CHARACTERISTICS OF THE pH-METER CP-411 15. TECHNICAL DATA

The CP-411 pH-meter belongs to the newest generation of

measuring devices with high accuracy and repeatability of

the readings and very easy operation.

FUNCTION: pH temperature

RANGE: 0.00 ÷ 14.00 pH - 50.0 ÷ 199.9 oC

RESOLUTION: 0.01 pH 0.1 oC

ACCURACY:

(±1 digit)

±0.01 pH In range 0 ÷100 oC

±0.8 oC

out of this range

2.0 oC ±1 digit*

Two kinds of power source - battery and power adapter

enable work in field and long-lasting measurements in the

laboratory. Thanks using the newest generation electronic

elements the meter has very low power consumption what

greatly increases the operation time on 1 battery. * accuracy of the meter with standard temperature probe, in case of using

PT1000 1/3B probe the accuracy may be greater.

The meter is equipped with large LCD display, it enables

observing the value of pH measurement or temperature.

Waterproof housing makes working in difficult conditions

possible. Small size and weight make working in the field

easier.

INPUT IMPEDANCE: 1012 Ω

TEMPERATURE COMPENSATION: automatic

COMPENSATION RANGE: -5.0 ÷ 110.0 oC

pH ELECTRODE CALIBRATION: automatic,

Main features of the CP-411 pH-meter are: in1÷3 points

- high accuracy and stability of the reading;

- automatic temperature compensation; THERMAL STABILITY OF ZERO : 0.001 pH/ oC

- electrode calibration in 1 to 3 points; OPERATING TEMPERATURE: -5 ÷ 45 oC

- automatic recognition of 3 pH buffers 4,00; 7,00; 9,00; POWER: 1. battery 9V type 6F22

- HOLD function – freezes the result on the display; 2. stabilised power adapter 9V

- storing of the pH electrode characteristic in non-volatile

memory; POWER CONSUMPTION: 27 mW

DISPLAY: LCD 55 x 45 mm

TEMPERATURE PROBE resistor Pt-1000

- protection against damage caused by wrong connecting

of the battery; DIMMENSIONS: 149 x 82 x 22 mm

WEIGHT: 220 g

- function informing with LOBAT signal about necessity of

changing the battery;

- automatic switch off function.



Users manual CP-411 pH meter

- 19 - - 4 -

13. POWER SOURCE AND CHANGING THE BATTERY

3. WHAT IS THE METER DESIGNED FOR?

The meter enables measurements of hydrogen ions

concentration expressed in pH units and temperature in °C.

It may be used during field or laboratory measurements.

Waterproof housing enables work even in hard atmospheric

conditions or in high humidity places. In dependence on the

kind of used pH electrode the CP-411 may measure clean

water, sewage, soil, milk, meat, cheese, etc. This pH-meter

finds application in food processing, chemical or

pharmaceutical industry, power industry, water treatment

stations, sewage treatment station, chemical laboratories,

agriculture, schools and universities etc.

The meter is 9V battery or stabilised power adapter

powered. The adapter should be joined with the right

connector in the meter (pic. 1, no. 4). Joining the power

adapter disconnects the battery.

Displaying the symbol informs that the battery should

be changed. To do this it is necessary to unscrew the two

screws in the lower wall of the meter pull out the whole wall

and replace the battery.

The next thing is to put the battery back into the meter and

mount the wall. The special shape of the wall enables wrong

mounting, only in one position it is possible to put the wall on. The pH meter is prepared for work with every kind of pH

electrode with BNC-50 plug. It is also possible to connect

two electrodes (measuring and reference) using a special

adapter offered as optional equipment. The meter co-

operates with PT-1000 temperature probe with Chinch plug.

The wall on the edge has a sealing ring. It is very important to

pay attention, during closing the meter, if the ring on the

whole edge was put inside the housing. If it is correct screw

the screws till feeling the resistance (not to hard). Leaving the

wall not correctly screwed causes loosing the waterproofnes

and may cause flooding the meter and it’s destroying. This

kind of failure is not repaired on the warranty conditions.

14. EQUIPMENT

The standard set includes:

1. standard glass combination pH electrode;

2. temperature probe Pt-1000B ( standard);

3. plastic container for the meter temperature probe and the

electrode;

4. users manual with warranty.

As the extra equipment one may order:

1. power adapter 9V

2. adapter to connect the separate pH metric electrode and

the reference electrode with the meter on place of the

combination electrode.

3. temperature probe Pt1000 1/3B – higher accuracy



Users manual CP-411 pH meter

- 5 - - 18 -

11. TEMPERATURE MEASUREMENT

4. OUTSIDE VIEW.

The temperature measurement is done as follows:

On the front wall of the meter there is a large LCD display

(pic. 1) on which depending on the chosen function

following symbols are displayed: - to the Chinch connector connect the temperature probe;

- by pressing button switch the meter on;

result of the pH measurement in pH units; - press the button, by the displayed value a symbol

will appear

result of the temperature measurement in °C units;

The measuring function is chosen with or buttons. - put the temperature probe to the measured solution;

The symbols of the units are displayed on the right side of

the results. - wait till the stabilisation of the value on the display and

read the result.

In case of disconnecting the temperature probe the meter

automatically switches it self to the constant temperature

compensation set by the manufacturer on 20 °C. Next to the

pH result a blinking symbol will appear. If the battery

should be changed a symbol is displayed. The

keyboard placed under the display is used for switching the

meter on and off, choosing the measuring function,

calibration and freezing the result.

The meter co-operates with the PT-1000 probe. Depending

on its class the accuracy of the measurement changes.

12. FREEZING THE RESULT ON THE DISPLAY

To hold (freeze) the current measurement result on the

display it is necessary to wait for it’s stabilisation and than to

press the button. After this both results of pH and

temperature measurement will be hold and the current

result of active measurement (pH or temperature) will be

displayed on turns with sign (Hold). With and

buttons the user may change the hold result to pH or

temperature value.

The keyboard has following buttons:

- switching the meter on and off;

- pH measurement;

- temperature measurement; Next pressing of the button results is returning the

meter to normal measuring mode. On the display for a

moment a (continuation) sign will be displayed and after

this the current measurement result.

- longer pressing in pH measuring mode enables

entering the calibration mode (CAL symbol is

displayed), short pressing of this button stores the

calibration result;

- freezing the result on the display;

In upper wall of the meter there are inputs with below given

symbols:

1. F - BNC-50 connector for connecting the combination pH

electrode or Redox electrode;

2. t - Chinch input for connecting the temperature probe;

3. pin input for connecting a reference electrode;

4. P - Power adapter input 9V.



Users manual CP-411 pH meter

- 17 - - 6 -

Results of multiple pH measurements of this same solution

with stabile temperature may differ one from another. When

analysing this situation the below given factors should be

taken into consideration.:

- the differences may occur because of using not very

good quality electrode;

- the result was taken as stabilised to early (the time of

stabilisation of middle class electrode is about 40 s.);

- the measured solution may not be homogeneous and

without using the electromagnetic stirrer the results

won’t be equal.

- During measurements of sewage a chemical reactions

may occur what can change the result.

Small differences of the results are connected with the

accuracy of the meter. The accuracy of CP-411 is ±0,01 pH,

±1 digit, what practically means that in extreme conditions

results of two measurements of this same solution may

differ ±0,05 pH and this will be an acceptable error. It is so

because one result will be made with an error of – 0.02 and

the second one with error + 0,02. Expression ±1 digit in the

technical data takes into consideration another possible

difference which arises because of so called discretisation

error – number of digits displayed on the LCD.

Sometimes after calibration one may check it’s accuracy in

another buffer solution. If two point calibration was done for

example in buffer solutions 7,00 pH and 4,00 pH and the

accuracy of calibration is checked in buffer 9,00pH in some

cases the result may be 8,90 pH or 9,10 pH. Such

difference is possible when the characteristic of the

electrode isn’t symmetrical with 7 pH.

Using minimum three point calibration with neutral, alkali

and acidic buffer solutions may prevent this situation.

Picture 1



Users manual CP-411 pH meter

- 16 -

- 7 -

5. SWITCHING THE METER ON AND OFF Often it happens when wrong kind of electrode was chosen

for the kind of measured solution.

The meter is switched on by pressing the button. The

meter tests the memory and display on which all symbols

are displayed.

Leaving the electrode for few hours in the distilled water or

placing it in water with detergent may eliminate this

symptoms, especially if the measurements were done in

solutions with deposits, fats or oils. The electrode which for

a long time wasn’t used may have the junction clogged by

KCl crystals, what may be removed by placing the electrode

in distilled water. Heavily contaminated electrode may be

cleaned in chloroform and deposits of iron in 2N HCl.

Depending on the kind of measured solution or substance

proper kind of electrode should be chosen. They differ one

from another with shape, membranes look, kind of junction

and body. Electrodes for heavily polluted sewage is different

than this for clean water or for meats or soil. It should fulfil

the following conditions:

Picture. 2 a. it must be easy to wash, so an electrode with plastic

unremoveable housing shouldn’t be used. Deposits, fats

and chemical compound will precipitate on the junction

what will disable the measurement or falsify the results;

If the test was successful, after about 1.5 s the meter

switches it self automatically to the measuring mode, in

which it was switched off. Continuous displaying of the test

informs about loosing the electrode characteristic. After

pressing the button the meter will automatically provide

standard characteristic and will enter the measuring mode. It is

necessary to make the calibration after this.

b. shape of the membrane should enable easy washing.

For measurements in sewage the best shape of

membrane is a cylinder shape;

c. junction in the electrode for sewage has more holes what

enables easy flow of the electrolyte and makes clogging

difficult;

If the situation will repeat after each switching off of the

meter it informs about loosing the manufacturers settings

and it has to be repaired in the service. d. during measurement of sewage or liquids with deposits

with electrode which shape enables refilling of the

electrolyte the hole for refilling should be opened to use

the difference of pressures to clean the junction.

The meter is switched off by pressing the button.

In case of working on the batteries to save them the meter

switches it self automatically off after 10 minutes from the

last pressing of any button. This function is switched off for

the time of calibration or working with the power adapter.



Users manual CP-411 pH meter

Andere Handbücher für CP-411

Inhaltsverzeichnis

Andere ELMETRON Messgerät Handbücher

ELMETRON

ELMETRON CX-461 Bedienungsanleitung

ELMETRON

ELMETRON CC- 411 Bedienungsanleitung

ELMETRON

ELMETRON CP-411B Bedienungsanleitung

ELMETRON

ELMETRON CP-511 Bedienungsanleitung

ELMETRON

ELMETRON CO-505 Bedienungsanleitung

ELMETRON

ELMETRON CX-401 Bedienungsanleitung

ELMETRON

ELMETRON CX-401 Bedienungsanleitung

ELMETRON

ELMETRON CP-411 Bedienungsanleitung

Beliebte Messgerät Handbücher anderer Marken

Suaoki

Suaoki D40 Bedienungsanleitung

Elster

Elster BK-G1.6 Bedienungsanleitung

Endress+Hauser

Endress+Hauser Deltabar FMD71 Handbuch

Duratool

Duratool D03128 Bedienungsanleitung

Vega

Vega VEGAPULS 65 Bedienungsanleitung

Tonghui

Tonghui TH2618B Bedienungsanleitung

Tenmars

Tenmars TM-801 Bedienungsanleitung

MSR

MSR 145 Bedienungsanleitung

TPS

TPS WP-82 Bedienungsanleitung

PCB Piezotronics

PCB Piezotronics 003C30 Bedienungsanleitung

Tenma

Tenma 72-10465 Bedienungsanleitung

Endress+Hauser

Endress+Hauser Proline Promag 50 Technische Daten

Siemens

Siemens SITRANS F Coriolis FCT030 Stücklistenhandbuch

KLINGER

KLINGER CMF V Series Bedienungsanleitung

EXFO

EXFO FTB-2 Bedienungs- und Wartungshandbuch

Keysight

Keysight M8290A Bedienungsanleitung

ADTEK

ADTEK MW-5 Bedienungsanleitung

Acterna

Acterna MS1400 Bedienungsanleitung