Velleman DVM8838 User Manual [en, de, es, fr]

DVM8838

INFRARED THERMOMETER (-50°C TO +1000°C)
INFRAROODTHERMOMETER (-50°C ~ +1000°C)
THERMOMÈTRE INFRAROUGE (-50°C ~ +1000°C)
IR-THERMOMETER (-50°C ~ +1000°C)
TERMÓMETRO INFRARROJO (-50°C ~ +1000°C)

USER MANUAL 3
GEBRUIKERSHANDLEIDING 8
NOTICE D’EMPLOI 13
MANUAL DEL USUARIO 18
BEDIENUNGSANLEITUNG 23



DVM8838

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DVM8838

User manual

1. Introduction

To all residents of the European Union
Important environmental information about this product

If in doubt, contact your local waste disposal authorities.

Thank you for choosi ng V el le man! Please read the manual thoroughly before b ringing this
device into service. If the device was damaged in transit, don't instal l or use it and contact
your dealer.

2.

CLASS II

• Damage caused by disreg ar d o f certain guidelines in this manual is not covere d b y the
warranty and the dealer will not accept responsibility for any ensuing defects or problems.

• Note that damage caused b y u s e r modifications to the device is not covered b y the
warranty.

3.

• Protect this device from shocks and abuse. Avoid brute force when operating the device.

• Protected the device against extreme heat and dust.

• Familiarise yourself with the functions of the device before act uall y us ing it .

• All modifications of the devi ce ar e fo rbid den for safet y rea son s.

• Only use the device for its intended purpose. Using the device in an unauthorised way will

void the warranty.

4.

• professional device, quick and easy to use

• very high temperature range

• very high distance to target ratio (30:1)

• built-in laser pointer

• temperature readout in °C or °F

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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) a s 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.

Safety Instructions

When device is in use, NEVER look directly or indirectly (reflectance) into
the laser beam. NEVER point the laser beam directly or via a reflecting

surface towards other people’s or animals’ eyes. Permanent eye damage will
result. Use extreme caution when the laser beam is turned on.

Do not point the laser beam towards hig hly explosive gases.

Keep out of reach of all children.

Keep this device away from rain, moisture, splashing and dripping liquids.

Visible laser radiation. Do not stare into the beam as eye
damage may occur. This device contains a class 2 laser.

Output power does not exceed 1 mW, wavelength
630~670nm.

DO NOT disassemble or open the cover. No user-serviceable parts inside.
Refer to an authorized dealer for service and/or spare parts.

General Guidelines

Features

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DVM8838

• LCD display with backlight

• data-hold, auto power-off and lock-on function

• MIN, MAX, DIF and record functions

• adjustable emissivity

• high and low alarm

5.

Overview

Refer to the drawings on page 2 of this manual.

1 IR sensor 6 mode button
2 laser pointer beam 7 laser/backlight button
3 LCD display 8 measurement trigger
4 down button 9 grip
5 up button 10 battery cover

A hold indication F °C or °F indication
B measuring indication G high and low alarm indication
C emissivity indication and value H MAX, MIN, DIF, AVH, HAL and LAL value
D battery, lock and laser ON indication I indication for H
E backlight ON indication J current measurement value

K °C and °F switch M alarm set switch
L lock on/off switch

6. Operation

• Hold the thermometer by the grip [9] and point the IR sensor [1] towards th e su rfac e of
which the temperature needs to be measured.

• Pull and hold the measurement trigger [8]. The LCD display [3] shows the current
temperature [J].

• During measurement, the word ‘SCAN’ [B] is visible in the LED display. When the
measurement stops (trigger [8] released), the word ‘HOLD’ [A] is shown. The last
measured value will remain on the display until the measurement trigger [8] is pulled
again, or when the thermometer powers-off automatically (after ± 7 seconds).

• Depending on the mode, the bottom of th e screen shows the MAX, MIN, DIF, AVH, HAL and
LAL value. Use the mode button [6] to scroll through the modes of the de vic e. Th e mode

[I] and corresponding value [H] are shown on the display.

EMS Emissivity

(*)

MAX Highest measured value
MIN Lowest measured value

DIF Diffe renc e between the highest and lowest measured value
AVG Average value of the temperature
HAL Higher alarm limit

LAL Lower alarm limit

(*)

For more information on emissivity, refer to §7 Useful information.

• To set EMS, HAL or LAL, use the up [5] or down [4] button to adjust the value and press
the mode button [6] again to save the value and go to the next item. To cancel mode
selection, pull the measurement trigger [8]. Pushing the mode button [6] after setting the
lower alarm limit will start the set-up cycle again.

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DVM8838

• Note that MAX, MIN, DIF and AVG only apply to the cu rre nt me asu rin g se ssi on (time
between pulling the trigger [8] and releasing it). Their value is reset when an new
measurement starts or the thermometer switches off.

• To switch between measurements in °C and °F , open the battery cover [10]. The battery
cover has a hinge at the bottom of the device. Hold the battery cover at the top (next to
the measurement trigger [8]) and gently pull aw ay fr om the de vice.

• The °C/°F switch [K] is located just below the measurement trigger [8]. Move this switch
to the desired setting. The current setting is indicated [F] in the display.

• Also under the battery cover [10], there is a lock switch [L]. Move this switch to the ON-
position for continuous measurement. The current settin g is indicated with a lock symbol
[D] in the display. Start measuring by pulling the measurement trigger [8] once. Consider
disabling the laser targeting be am in continuous measuring mode to save battery power. To
stop and disable lock mode, set the switch [L] back to the OFF-position. In lock mode, it is
still possible to adjust EMS, HAL and LAL values.

• The third switch under the battery cover [10] is the alarm set switch [M]. Move this switch
to the ON-position to en able alarm warnings when h igh or low alarm limits a re exceeded.
When enabled, a Hi- and LOW indication [G] are shown on the display.

• Close the battery cover [10] by pushing it back towa r ds the device until it snaps in pl ace .

• When the measured value exceeds a preset alarm limit, an audible alarm signal will be

produced (when the alarm set switch [M] is set to ON), and the according alarm icon in the
display [G] will flash. Alarm will stop when temperature is back within preset limits.

• Push the laser/backlight button [7] to cycle th rough the laser and backlight options. Note
that the laser beam is o nly an aiming aid, be careful when using it. Refer to the safety

instructions.

Push result display

1 backlight on indicator [E]
2 backlight on and laser enabled indicator [E] + [D]
3 backlight off and laser enabled indicator [D]
4 backlight off and laser disabled no indication

Notes:

• The device powers off automatically (after ± 7 sec o nds) when no ac t ivity is de t e c t e d ,

unless it is in lock mode.

• The unit will not measure correctly through transparent surfaces (e.g. glass), as it will

measure the surface temperature of the transparent surface.

• Steam, dust, smoke etc. will ha ve a n egative impact on the measurements accu rac y.

• Measurements on shiny and/or polished surface s are not recommended.

7.

Useful information

Working principl e

The Infra Red sensor of the unit detects energy that is emitted, reflected and transmitted by
a surface. This energy is focussed onto a detector that converts this information into a
temperature reading. The laser beam is only used for aiming purposes.

Ambient temperature

The thermometer automatically compensates ambient temperature conditions. Allow the
thermometer to stabilise to ambient temperature for at least 30 minutes for accurate
measurements.
Surface temperature
When going from low temperature to high temperature measurements or vice versa, the IR
sensor of the thermometer needs a few minutes to adjust.

Distance and spot size

Refer to the drawing on page 2 of this manual.
As the distance (D) from the object increases, the spot size (S) of the area measured by the
unit becomes larger. The focal point for this unit is 914mm (36”). Note that the laser beam
points 16mm above the measurement centre point.

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DVM8838

Field of view

The target must be larger than the spot size to ensure correct measurement. This means
that for smaller targets, the thermometer must be held closer to the target. For best
accuracy, make sure the target is at least twice as large as the spot size.

Emissivity

Emissivity describes the energy-emitting characteristics of materials. Most organic or
oxidized surfaces have an emissivity of ±0.95 (default setting). Measuring shiny or po lished
surfaces will be inaccurate. Use some maski ng tape or paint to compensate, allow sufficient
time for the tape or paint to reach the surface temperature.

Substance Emissivity Substance Emissivity

Asphalt 0.90 to 0.98 Cloth (black) 0.98
Concrete 0.94 Human skin 0.98

Cement 0.96

Sand 0.90

Earth 0.92 to 0.96

Leather
Charcoal

(powder)
Lacquer

Water 0.92 to 0.96 Lacquer (matt) 0.97
Ice 0.96 to 0.98 Rubber (black) 0.94

Snow 0.83

Plastic
Glass 0.90 to 0.95 Timber 0.90
Ceramic 0.90 to 0.94 Paper
Marble 0.94 Chromium oxides 0.81

Plaster 0.80 to 0.90 Copper oxides 0.78
Mortar 0.89 to 0.91

Iron oxides
Brick 0.93 to 0.96 Textiles 0.90

8. Troubleshooting
LCD display doesn’t light up when the

measurements trigger is pulled.
The measured temperature changes very

quickly and the shown value seems unlikely.

Possibly a battery problem. Check and
replace the battery.

Check the emissivity value. When set too
low, inaccurate readings will result.

• Repairs or service should only be carried out by qualified and trained technicians.

9.

Cleaning and storage

• The IR sensor (1) is the most delicate part of the thermometer and should be kept clean
at all times. To do this, only use a soft cloth or cotton bud. Do not use excessive
pressure on the sensor.

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0.95 to

1.00

0.96

0.80 to

0.95

0.85 to

0.95

0.70 to

0.94

0.78 to

0.82

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DVM8838

• Wipe the other parts of the thermometer regula rly with a dry cloth. Do not use abrasive
solutions or solvents.

• Do not submerge the thermometer in water or any other liquid.

• There are no user-serviceable parts.

• Contact your dealer for s pa re p a rts if necessary.

• The device must be stored in a place with temperature conditions between - 20° C a nd

+60°C (-4°F and +140°F) and relative humidity lower than 80%.

10.

Battery

• When the battery indicator [D] indicates low battery, replace the battery wit h a new one.

• Open the battery cover [10]. The battery cover has a hinge at the bottom of the device.

Hold the battery cover at the top (next to the measurement trigger [8]) and gently pull
away from the device.

• If necessary switch the lock switch [L] to the OFF-position first.

• Connect a new 9V battery to the thermometer with the battery clip and insert the battery

in the battery compartment.

• Push the cover back towards the device until it snaps into place.

WARNING: malfunction may occur if the power is on when the battery is
replaced. Dispose of batteries in accordance with local regulations.
Keep the battery away from children.

11.

Technical specifications

Temperature Overall range -50°C ~ 1,000°C (-58°F ~ 1,832°F)
Temperature accuracy

T

=23~25°C

amb

=73~77°F)

(T

amb

-50~20°C (-58~68°F)

-20~200°C (-4~392°F)
200~538°C (392~1,000°F)
538~1,000°C (1,000~1,832°F)

±5°C (±9°F)
±1.5% reading ±2°C (3.6°F)
±2.0% reading ±2°C (3.6°F)
±3.5% reading ±5°C (9°F)

Display resolution 0.1°C (0.1°F)
distance-to-spot ratio D:S = 30:1
Response time < 1s

Spectral response 8~14µm
Emissivity Adjustable from 0.10 to 1.00 - step 0.01
Over range indication Display shows ‘-OL’ or ‘+OL’
Operating temperature 0~50°C (32~122°F)
Storage temperature -20~60°C (-4°F~140°F)
Relative humidity 10%~90% operating, < 80% storage
Diode laser Output <1mW, wavelength 630~670nm, Class II laser prod uct
Battery type 1x 9V battery
dimensions 100x56x230mm
weight 290g (10.2oz.)

Use this device with original accessories only. Velleman nv cannot be held
responsible in the event of damage or injury resulte d from (incorrect) use of this
device. For more info concerning this product, please visit our website

www.velleman.eu

. The information in this manual is subject to change without

prior notice.

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DVM8838

Gebruikershandleiding

1. Inleiding

Aan alle ingezetenen van de Europese Unie
Belangrijke milieu-informatie betreffende dit pro d uc t

toestel naar uw verdeler of naar een lokaal recyclagepunt brengen. Respecteer de
plaatselijke milieuwetgeving.

Hebt u vragen, contacteer dan de plaatselijke autoriteiten inzake 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.

KLASSE 2

• De garantie geldt niet voor schade door het negeren van bepaalde richtlijnen in deze

• Schade door wijzigingen die de gebruiker heeft aangebracht aan het toestel vallen niet

3.

• Bescherm dit toestel tegen schokken. Vermijd brute kracht tijdens de bediening van dit toestel.

• Bescherm dit toestel tegen extreme temperaturen, stof en vochtigheid.

• Leer eerst de functies van het toestel kennen voor u het gaat gebru ike n.

• Om veiligheidsredenen mag de gebruiker geen wijzigingen aanbrengen aan het toestel.

• Gebruik het toestel enkel waarvoor het gemaakt is. Bij onoordeelkundig gebruik vervalt

4.

• professionele thermometer, gemakkelijk en snel te gebruiken

• hoog temperatuurbereik

• zeer hoge verhouding afstand-meetpunt (30:1)

• ingebouwde laserpointer

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Dit symbool op het toestel of de verpakki ng geeft aan dat, als het na zijn
levenscyclus wordt weggeworpen, dit toestel schade kan toebreng en 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

Veiligheidsinstructies

Kijk nooit rechtstreeks of onrechtstreeks in de laserstraal. Richt de

straal NOOIT (direct of via een reflecterend object) in de richting van de ogen
om premanente oogletsels te voorkomen. Gebruik een ingeschakeld toestel
met voorzichtigheid. Richt de straal nooit in de richting van explosieve gassen.

Houd dit toestel uit de buurt van kinderen.

Houd dit toestel uit de buurt van regen, vochtighe id en opspattende
vloeistoffen.

Zichtbare laserstraal. Kijk noo it in de straal om oogletsels te
vermijden. Dit toestel is uitgerust met 2 laserstralen.

Het uitgangsvermogen bedraagt niet meer dan 1 mW,
golflengte 630~670 nm.

De behuizing mag nooit geopend worden. De gebruiker mag geen onderdelen
vervangen. Bestel eventuele reserveonderdelen bij uw dealer.

handleiding en uw dealer zal de verantwoordelijkheid afwijzen voor defecten of problemen
die hier rechtstreeks verband mee houden.

onder de garantie.

Algemene richtlijnen

de garantie.

Eigenschappen

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DVM8838

• weergave van de temperatuur in °C of °F

• lcd-scherm met achtergrondverlichting

• dataholdfunctie, automatische uitschakeling en vegrendeling

• MIN-, MAX-, DIF- en recordmetingen

• instelbare emissiviteit

• hoog en laag alarm

5.

Omschrijving

Raadpleeg de figuren op pagina 2 van deze handleiding.

1 IR-sensor 6 modustoets
2 laserpointer 7 laser/achtergrondverlichting
3 lcd-scherm 8 meetknop
4
5

-toets

-toets

9 handvat
10 batterijvak

A aanduiding ‘data hold’ F °C /°F
B meetaanduiding G laag/hoog alarm
C emissiviteit H MAX, MIN, DIF, AVH, HAL en LAL
D batterij, vergrendeling, laser ingeschakeld I H
E achtergrondverlichting J waarde-uitlezing

K schakelaar °C/°F M alarmschakelaar
L vergrendelschakelaar

6. Gebruik

• Houd de thermometer bij het handvat [9] vast en richt de IR-sensor [1] naar het te meten

object.

• Houd de meetknop [8] ingedrukt. De display [3] geeft de gemeten waarde weer [J].

• Tijdens de meting verschijnt de aa nduiding ‘SCAN’ [B]. Bij het loslaten van de meetknop

[8] verschijnt de aanduidi n g ‘ HO LD ’ [A]. De laatst geme ten waa rde bli jft op de displ a y
weergegeven tot de meetknop [8] opnieuw wordt ingedrukt of tot de thermometer
automatisch uitschakelt (na ± 7 seconden).

• De aanduiding MAX, MIN, DIF, AVH, HAL of LAL verschijnt naargelang de ingestelde
modus. Scroll door de opties met de modustoets [6]. De modus [I] en overeenkomstige
waarde [H] worden op de display weergegeven.

EMS emissiviteit

(*)

MAX hoogst gemeten waarde
MIN laagst gemeten waarde

DIF verschil tussen hoogst en laagste waarde
AVG gemiddelde temperatuurwaarde
HAL hoog alarm

LAL laag alarm

(*)

Voor meer informative over emissiviteit, raadpleeg §7 Nuttige informatie.

• Stel EMS, HAL of LAL in met toets [4] of [5] en bewaar de waarde met de
modustoets [6]. Verlaat het modusmenu door de meetknop [8] in te drukken. Druk de
meetknop [6] opnieuw in na het instellen van de HAL- en LAL-waarde om het instelmenu
opnieuw op te starten.

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