VWR DO-230 Manuel utilisateur

Instruction manual

VWR® DISSOLVED OXYGEN METER DO-230

EU Catalogue Number: 664-0236

Version: 1.0

Issued: 1, December, 2020

Legal Address of Manufacturer

VWR International bv

Researchpark Haasrode 2020

Geldenaaksebaan 464

B-3001 Leuven

+ 32 16 385011

www.vwr.com

Country of origin: Poland

CONTENTS

I. Introduction 1

1. Package content 2

2. Exploitation notices 2

3. Characteristics of the meter 2

4. The outside view 3

5. The meter‘s maintenance 5

6. Switching the meter on and off 6

6.1. Stabilised reading 7

7. Preparation to work 8

7.1. Choosing the kind of the temperature compensation 8

II. Oxygen concentration measurement 9

8. Basic information about the oxygen measurement 10

9. Entering the oxygen measurement parameters 12

9.1. Unit 12

9.2. Calibration points and date 12

9.3. Calibration validity time 13

9.4. The salinity influence compensation 13

9.5. Atmospheric pressure influence compensation 15

10. Calibration of the oxygen sensor 16

11. Measurement of oxygen concentration in water 18

11.1. Measurement with automatic temperature compensation 18

11.2. Measurement with manual temperature compensation 19

12. Measurement of oxygen content in air 20

III. Temperature measurement 21

13. Setting the temperature measurement parameters 22

13.1. Unit 22

13.2. Temperature of the manual compensation 22

14. Temperature measurement 23

IV. Options 24

15. Options screen 25

15.1. Functions 25

15.2. Memory 25

15.3. Miscellaneous 25

15.4. Info 27

16. Memorising readings, memory readout 28

16.1. Entering readings into the memory 28

16.2. Viewing and deleting readings 29

17. Power, replacing the rechargeable batteries 30

18. Technical data 31

19. Ordering information 32

20. Technical service 33

21. Warranty 33

22. Equipment disposal 34

I. INTRODUCTION

- 2 -

VWR Collection DO-230 dissolved oxygen meter instruction manual v1.0x

1. PACKAGE CONTENT

The standard set includes:

1. DO-230 dissolved oxygen meter.

2. Dissolved oxygen sensor with temperature sensor.

3. Accessories for the sensor: two membranes, electrolyte – 30 ml,

sodium sulphite – 50 g.

4. Plastic case.

5. 5V/1000mA power adapter.

2. EXPLOITATION NOTICES

Dear User!

Wide range of additional functions requires careful reading of the

manual, in other case some of the features may stay unused or using

the meter may be troublesome.

Accuracy of oxygen measurements depends on the sensor’s calibration and

regular conservation which consists in replacing the membranes, electrolyte

and cleaning the electrodes. Neglecting these activities after some time

would make measurements impossible. Please turn your attention to

the fact that stable measurement is possible only with natural or

simulated water flow.

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

3. CHARACTERISTICS OF THE METER

Two kinds of power source: the rechargeable battery and the power adapter,

enable work in field and long-lasting measurements in laboratory. The meter’s

memory is independent from power supply. Waterproof housing enables

working in difficult conditions. Minimised size and weight facilitate field work.

The most important features of DO-230 are:

- measuring of oxygen dissolved in water in % or mg/l, oxygen content in air

in % and temperature of solutions or air in 0C, 0F or K;

- automatic and manual temperature compensation;

- compensation of the salinity and the atmospheric pressure influence on the

oxygen concentration measurement;

- storing of the calibration date and parameters of oxygen sensor;

- possibility of introducing the date of calibration validity termination and

signalising its expiry;

- cooperation with Pt-1000 resistor temperature sensor;

- signalising of the reading stabilisation;

- storing measurement results with time and date;

- real time clock with date;

- automatic switch off after time set by the user.

- 3 -

4. THE OUTSIDE VIEW

On the front wall of the meter there is a graphic LCD placed (Pic. 1), which

displays the following measurement functions:

- oxygen concentration measurement in % or mg/l;

- temperature measurement.

At the top of the LCD the current time and date are displayed.

Choosing particular functions is described in the chapter 6.1. Symbols of the

units are displayed next to the reading.

Pic. 1.

The automatic temperature compensation is signalised by the symbol, the

manual compensation – by the symbol (next to the temperature reading).

The exclamation symbol (Pic. 1.) is displayed on the left in the following

situations marked with the colours:

yellow - the calibration validity date expired;

red - characteristic erase, the sensor calibration necessary.

The rechargeable battery condition is signalised by the symbol.

- 4 -

VWR Collection DO-230 dissolved oxygen meter instruction manual v1.0x

The button (Pic. 2) placed below the display is used for switching the

meter on and off.

In case of recording readings, the button is locked until the recording

process is stopped or finished.

In the upper wall of the meter connectors are placed with the symbols given

below:

F-BNC-50 input for connecting the dissolved oxygen sensor;

t-Chinch input to connect the temperature probe;

P- input for connecting the power adapter;

Pic. 2.

- 5 -

5. THE METER‘S MAINTENANCE

The meter is equipped with a graphic touch screen. The maintenance

consists in pressing particular keys and windows which appear on the

screen. Grey captions in the windows and keys inform that these elements

are not active in this particular operating mode. Particular keys, connected

with the measurement function (i.e. or ) become active after

selecting the chosen function. To select, press the screen in a freely chosen

spot of the chosen function. Around this spot a frame will display. To

deselect, press the spot again. If the chosen function has a possibility of

calibration, the key becomes active. If it has additional parameters,

the key also becomes active. The key is the only key in the

meter that responds exclusively to a long press (about 2 sec.). It prevents

from accidental erase of the electrode (sensor, cell) calibration data.

Entering incorrect value, attempt of calibration when the meter doesn‘t

recognise the standard or attempt to turn the meter off when the result

memorising proceeds are signalised by a triple warning sound, irrespective of

the chosen sound settings.

- 6 -

VWR Collection DO-230 dissolved oxygen meter instruction manual v1.0x

6. SWITCHING THE METER ON AND OFF

After switching the meter on with the button, the memory test proceeds.

If the test ends successfully, the meter enters the measurement screen with

settings entered before switching it off previously. In case of detecting the

manufacturer‘s calibration data loss, the following information will appear:

Pressing the button accepts standard manufacturer‘s calibration

parameters and enters the measurement screen. Such situation will be

repeating each time the meter is switched on and requires sending the meter

to the manufacturer for servicing.

In case of the user‘s data loss (i.e. the oxygen sensor characteristic), the

following information will appear:

Pressing the button accepts and records in the memory standard pH

electrode characteristic and enters the measurement screen. In such case,

calibration of the pH electrode is necessary. Analogical situation occurs in

case of other measuring functions. Repeating of the situation after switching

the meter on again informs about the EEPROM memory malfunction and

requires sending the meter to the manufacturer for servicing.

Switch the meter off by pressing the button. If the meter is powered only

by the internal rechargeable battery, it turns off after the time of non-use set

by the user (description in the chapter 15.3). This function is deactivated

during calibration, while memorising results and connecting with a computer

or power adapter.

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