Velleman DVM8681 Manuale utente

DVM8681

USER MANUAL 4

GEBRUIKERSHANDLEIDING 10

MODE D’EMPLOI 16

MANUAL DEL USUARIO 22

BEDIENUNGSANLEITUNG 28

INSTRUKCJA OBSŁUGI 35

MANUAL DO UTILIZADOR 42

DVM8681

V. 03 –15/10/2018 2 ©Velleman nv

DVM8681

V. 03 –15/10/2018 3 ©Velleman nv

DVM8681

V. 03 –15/10/2018 4 ©Velleman nv

USER MANUAL

1. Introduction

To all residents of the European Union

Important environmental information about this product

This symbol on the device or the package indicates that

disposal of the device after its lifecycle could harm the

environment. Do not dispose of the unit (or batteries)

as unsorted municipal waste; it should be taken to a

specialized company for recycling. This device should be

returned to your distributor or to a local recycling

service. Respect the local environmental rules.

If in doubt, contact your local waste disposal authorities.

Thank you for choosing Velleman! Please read the manual thoroughly

before bringing this device into service. If the device was damaged in

transit, do not install or use it and contact your dealer.

2. Safety Instructions

This device can be used by children aged from

8 years and above, and persons with reduced

physical, sensory or mental capabilities or lack of

experience and knowledge if they have been given

supervision or instruction concerning the use of the

device in a safe way and understand the hazards

involved. Children shall not play with the device.

Cleaning and user maintenance shall not be made by

children without supervision.

Do not disassemble or open the cover. There are no

user-serviceable parts inside the device. Refer to an

authorized dealer for service and/or spare parts.

Warning: Do not puncture batteries or throw them in

fire as they may explode. Do not attempt to recharge

non-rechargeable batteries (alkaline). Dispose of

batteries in accordance with local regulations. Keep

batteries away from children.

DVM8681

V. 03 –15/10/2018 5 ©Velleman nv

3. General Guidelines

Refer to the Velleman® Service and Quality Warranty on the last

pages of this manual.

Protect this device from shocks and abuse. Avoid brute

force when operating the device.

Familiarise yourself with the functions of the device before actually using it.

All modifications of the device are forbidden for safety reasons.

Damage caused by user modifications to the device is not covered

by the warranty.

Only use the device for its intended purpose. Using the device in

an unauthorised way will void the warranty.

Damage caused by disregard of certain guidelines in this manual

is not covered by the warranty and the dealer will not accept

responsibility for any ensuing defects or problems.

Keep this manual for future reference.

4. Features

waterproof housing (IP67)

dual display with ATC

data hold function

pen size, fits easily in the pocket

low battery indication

auto power off

°C of °F selectable

automatic calibration

calibration up to 3 points

5. Overview

Refer to the illustrations on page 2 of this manual.

measured pH reading

CAL –calibration mode

ATC –automatic temperature compensation

temperature reading

HLD –data hold

PWR –power button

CAL –calibration

DVM8681

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6. Battery Installation

Refer to the illustrations on page 2 of this manual.

The display will blink when battery power is insufficient.

1. Loosen the two screws holding the battery cover. Do not

discard the small washer.

2. Insert 4 x LR44 button cell batteries respecting the polarity.

3. Close the battery compartment.

7. Operation

7.1 General Operation

Refer to the illustrations on page 3 of this manual.

1. Remove the bottom and the inner cap to expose the

electrode. It is normal to find some whitish crystals on the

inner cap and electrode. Keep the sponge in the cap wet

to keep the electrode in a good storage condition.

2. Dip the electrode into the test solution. Press PWR and stir

the pH meter to get a stable reading.

3. A small dot will be flashing while the meter is in measuring

mode. The temperature (in °C or °F) will also be displayed.

4. Press HLD to freeze the current reading. Note that the dot

will stop flashing. Press HLD again to release the reading.

5. Turn off the meter by pressing PWR. Cover the electrode

with the cap and store the meter at an ambient temperature

between 0°C ~ 50°C (32°F ~ 122°F). Refer to

“7.4. Calibrating your Meter” to perform the 3-points

calibration.

7.2 Auto Power-Off

1. This meter will switch off after

approximately 20 minutes of inactivity.

2. Disable this function by holding HLD and PWR

simultaneously pressed before power-on. An “n” will briefly

appear onto the display. The function has been disabled.

The function will be reactivated after every power-off.

DVM8681

V. 03 –15/10/2018 7 ©Velleman nv

7.3 Automatic Temperature Compensation (ATC)

1. Since pH values are temperature dependent, pH applications

require some form of temperature compensation to ensure

standardized pH values. This meter automatically corrects

the pH values based on the temperature of the measured

solution.

2. Hold CAL and PWR simultaneously pressed

before power-on. “°C” or “°F” will appear

on the display. Select your temperature unit

with HLD and press CAL to save.

3. “SA” will briefly appear on the display to

indicate the selection has been saved. This

selection will be saved after power-off.

7.4 Calibrating your Meter

1. Calibration is necessary and should be done regularly, even

on a daily basis when using the meter often.

2. Switch on your pH meter.

3. Place the electrode into the pH 4 test

solution (available at your chemist’s) and

press CAL to enter the calibration mode.

“CA” will briefly appear on the display. After

a few seconds “CAL” and the pH value will

appear on the display indicating the meter

has been calibrated.

4. Do the same with the pH 7 and pH 10 test solutions.

5. The meter will display “En” if the calibration

was not done correctly or if the probe could

not detect the test solution in the voltage

range below. In this case, recalibrate as per

above.

pH 4.00

pH 7.00

pH 10.00

97 mV….250 mV

-60 mV….60 mV

-250 mV….-97 mV

DVM8681

V. 03 –15/10/2018 8 ©Velleman nv

6. If the meter successfully recognizes the test solution, the

solution pH value (4, 7 or 10) will appear on the display. If

the displayed value differs slightly from the supposed value,

e.g. 4.01 instead of 4.00, press HLD to change the value. The

adjustable calibration range for pH 4 is 3.50 ~ 4.50, for pH 7

is 6.50 ~ 7.50 and for pH 10 is 9.50 ~ 10.50.

7. A stable value will automatically be saved.

8. Cleaning and Maintenance

Avoid touching the probe with bare hands and keep it wet by

moistening the sponge in the cap.

Rinse the probe with tap water or better, de-ionized water after

each measurement.

Remove the batteries from the meter if not used for a long time.

9. Troubleshooting

No display after power-on

Check the batteries. Replace them if necessary (see “6. Battery

Installation”).

Slow response

Clean the probe thoroughly with tap water and rinse with de-

ionized water afterwards.

Display indicates “- - -”

The pH value is out of the pH range (pH 0 ~ pH 14). The solution

is either too acid or too alkaline.

The displayed pH value is unstable

The probe is exposed. Dip it in the solution to be measured.

10. Technical Specifications

accuracy

0.2 pH

pH range

0 - 14

temperature accuracy

± 1°C

temperature resolution

0.5°C/°F

resolution

0.1 pH

ATC

yes

self-calibration

yes

DVM8681

V. 03 –15/10/2018 9 ©Velleman nv

dimensions

150 x 36 x 25 mm

weight

65 g

battery

4 x LR44 (incl.)

Use this device with original accessories only. Velleman nv

cannot be held responsible in the event of damage or injury

resulting from (incorrect) use of this device. For more info

concerning this product and the latest version of this manual,

please visit our website www.velleman.eu. The information in

this manual is subject to change without prior notice.

The Velleman nv warranty covers normal operation and does

not cover battery, misuse, abuse, alteration, tampering,

neglect, improper maintenance or damage resulting from

leaking batteries. Proof of purchase is required for warranty

repairs. Warranty is void if the meter has been opened.

The copyright to this manual is owned by Velleman nv. All

worldwide rights reserved. No part of this manual may be copied,

reproduced, translated or reduced to any electronic medium or

otherwise without the prior written consent of the copyright holder.

DVM8681

V. 03 –15/10/2018 10 ©Velleman nv

GEBRUIKERSHANDLEIDING

1. Inleiding

Aan alle ingezetenen van de Europese Unie

Belangrijke milieu-informatie betreffende dit product

Dit symbool op het toestel of de verpakking geeft aan

dat, als het na zijn levenscyclus wordt weggeworpen, dit

toestel schade kan toebrengen aan het milieu. Gooi dit

toestel (en eventuele batterijen) niet bij het gewone

huishoudelijke afval; het moet bij een gespecialiseerd

bedrijf terechtkomen voor recyclage. U moet dit toestel

naar uw verdeler of naar een lokaal recyclagepunt brengen.

Respecteer de plaatselijke milieuwetgeving.

Hebt u vragen, contacteer dan de plaatselijke autoriteiten

betreffend de verwijdering.

Dank u voor uw aankoop! Lees deze handleiding grondig voor u het

toestel in gebruik neemt. Werd het toestel beschadigd tijdens het

transport, installeer het dan niet en raadpleeg uw dealer.

2. Veiligheidsinstructies

Houd buiten het bereik van kinderen en onbevoegden.

Dit toestel is niet geschikt voor gebruik door personen

(kinderen inbegrepen) met verminderde fysieke, zintuiglijke

of geestelijke capaciteiten of gebrek aan ervaring en kennis,

tenzij zij onder toezicht staan of instructie hebben gekregen

over het gebruik van het toestel van een persoon die

verantwoordelijk is voor hun veiligheid.

Houd toezicht op kinderen om te voorkomen dat ze met het

apparaat spelen.

Demonteer of open dit toestel NOOIT. Er zijn geen door de

gebruiker vervangbare onderdelen in dit toestel. Voor

onderhoud of reserveonderdelen, contacteer uw dealer.

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