Velleman DVM401 Manuel utilisateur

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DVM401 Rev. 02

01.07.2009 ©Velleman nv

re 1

01.07.2009

1. Int

To all r

Import

your dist

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If in do

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damage

Damage

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idity and temp

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DVM40

USER MA

European Un

ntal informati

n the device or

device after i

Do not dispose

icipal waste; it

ecycling.

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ocal recycling s

ur local wast

he Velleman! Pl

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install or use i

gard of certain

and the deale

or problems.

e functions of s

perature mete

me.

can be used t

, etc. and to ch

hi-fi installati

to measure l

tes for the angl

very stable lo

sing the built-i

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UAL

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on about this

the package in

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disposal au

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and contact yo

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Rev.

©Velleman

product

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DVM401 Rev. 02

01.07.2009 ©Velleman nv

2. Features

•the device measures sound levels, luminous intensity, temperature

and humidity

•the 3 1/2–digit LCD displays the following units: Lux, °C, %RH, C &

dB and A & dB

•low-battery indication

•luminous intensity from 0.01 to 20000Lux

•sound level range (resolution 0.1dB)

A-weighting LO (low) : 35 – 100dB

A-weighting HI (high) : 65 – 130dB

C-weighting LO (low) : 35 – 100dB

C-weighting HI (high) : 65 – 130dB

•humidity measurements from 25 to 95%RH, fast response and

resolution 0.1%RH

•temperature measuring levels from –20°C to +750°C / -4°F to

+1400°F

3. Overview

Refer to the illustration on page 2 of this manual.

1. LCD display: 3 ½-digit LCD. Displays a wide variety of units (Lux, x

10 Lux, °C, °F, %RH, dB, A, C, Lo, Hi) and also gives ‘BAT’, ‘MAX

HOLD’ and ‘DATA HOLD’ indications.

2. Power button: activates or deactivates the device

3. Select button: Used to select function and range

4. MAX HOLD: Press this button to hold the maximum reading. Press

again to release the reading and continue your measurements.

5. DATA HOLD: Press the HOLD button to hold a particular reading

and press it again to continue your measurements.

6. Function switch: Select temperature, humidity, sound level and

luminous intensity with this switch.

7. Microphone: built-in electret condenser microphone

8. Photo detector: long-life silicon photo diode is built in

9. Sensor for humidity measurements is built-in

10.Temperature terminal: insert the temperature probe in this

terminal

DVM401 Rev. 02

01.07.2009 ©Velleman nv

4. Operation

a) Measuring Sound Levels

1. Place the function switch in the dB position.

2. Hold the microphone at a horizontal angle to the source to be

measured.

3. Press the SELECT button to select A & dB, C & dB, Lo & dB or Hi &

dB.

4. Both the A- and C-weighting curves have a frequency range

between 30Hz and 10kHz.

5. The fast response is ideal to measure short bursts of sound and

peak values.

6. The sound level is displayed.

Note: strong winds (> 10m/sec.) can influence your measurements.

Use the included windscreen when this happens.

b) Measuring Light Levels

1. Place the function switch in the LUX-position

2. Hold the detector at a horizontal angle to the source to be

measured.

3. Press SELECT to select the range: 20, 200, 2000, 20000Lux.

4. Read the nominal value from the display.

5. The overrange indication (“1”) is displayed if the input signal

exceeds the range limit. Select a higher range.

6. Remove the photo detector from the light source when the

measurement is completed.

7. The spectral sensitivity of this device is very similar to the CIE curve

(International Commission on Illumination) depicted below:

relative sensitivity spectral sensitivity

wavelength (Nm)

DVM401 Rev. 02

01.07.2009 ©Velleman nv

8. Recommended illumination: see table below.

At the Office

conference room, reception area 200 – 750

clerical wor

700 – 1500

typing 1000 – 2000

In a Factory

packing wor

150 – 300

production lines 300 – 750

inspection wor

750 – 1500

electronic parts assembly line 1500 – 3000

In a Hotel

public room, cloakroom 100 – 200

reception 200 – 1000

Store

staircase 150 – 200

show window 750 - 1500

front of show window 1500 – 3000

Hospital

sick room, warehouse 100 - 200

operating room 300 – 750

School

auditorium, gymnasium 100 – 300

classroom 200 – 750

library, laboratory 500 - 1500

c) Measuring Humidity

1. Place the function switch in the %RH position.

2. Read the measured value from the LCD.

3. The device needs a couple of minutes to catch up when the relative

humidity of the tested area changes.

d) Temperature Measurements

1. Place the function switch in the TEMP position.

2. Press the SELECT button to select 0.1°C or 1°C and 1°F or 0.1°F.

3. Read the measured value from the display.

4. Insert the K-type thermocouple in the appropriate socket.

DVM401 Rev. 02

01.07.2009 ©Velleman nv

5. Touch the target surface with the extremity of the temperature

sensor and read the measured temperatures from the LCD.

Attention: Be careful when the range selector is positioned on one of

the following ranges: 0.1°C, 1°C, 0.1°F or 1°F. Do not

attempt to make voltage measurements while the test leads

are connected with the K-type thermocouple socket.

Ignoring this warning may lead to personal injury or

damage to the device.

5. Maintenance

The battery should be replaced when “BAT” appears on the display.

Open the battery compartment, replace the old battery (1 x 9V-battery

type 6F22 or equivalent) and close the compartment again.

6. Technical specifications

Display 1999 counts and the following

indications: dB, A & dB, C & dB, Lo &

dB, Hi & dB, MAX HOLD, DATA HOLD

indication

Polarity automatic negative polarity indication

Overrange Indication “OL”

Low-Battery Indication “BAT” is displayed when the battery’s

voltage drops below the operating

level

Measurement Rate 1.5 measurements per second,

nominal.

Storage Temperature -10°C to 60°C (14°F to 140°F)

Auto Power Off after ± 10 minutes of inactivity

Power Source one 9V-battery (e.g. 6F22)

Dimensions 251 x 63.8 x 40 (H x W x D)

Dimensions Photo detector 115 x 60 x 27mm

DVM401 Rev. 02

01.07.2009 ©Velleman nv

SOUND

Sound Level Measurement Range

A-weighting LO (low): 35 – 100dB

A-weighting HI (high): 65 – 130dB

C-weighting LO (low): 35 – 100dB

C-weighting HI (high): 65 – 130dB

resolution 0.1dB

Typical Frequency Range 30Hz to 10KHz

Frequency Weighting A- & C-weighting

Time Weighting fast

Maximum Hold max. value does not change if the

increase in volume < 1.5dB / 3 min.

Accuracy ±3.5dB at 94dB, 1KHz sine wave

Microphone electret condenser microphone

LIGHT

Measuring Range 20, 200, 2000, 20000Lux (20000Lux

reading x 10)

Overrange Indication “1”

Accuracy ±5% of reading + 10 digits (calibrated

with standard incandescence lamp at a

colour temperature of 2856K)

Thermal sensitivity ±0.1°C

Photo detector silicon photo diode with filter

HUMIDITY/TEMPERATURE

Humidity Measurement Range 25 to 95%RH

Temperature Range -20°C to +50°C (-4°F to +122°F) with

built-in temperature sensor

-20 to +200°C (-4°F to +200°F) for

low range

-20 to +750°C (-4°F to +1400°F) for

high range

Resolution 0.1%RH, 0.1°C/0.1°F low range,

1°C/1°F high range

Accuracy (after calibration)

Humidity ±5%RH (at 25°C, 35 to 95%RH)

Humidity Sensor Response Time ±6 min.

Temperature ±3% rdg ±2°C (from –20°C to

+200°C)

DVM401 Rev. 02

01.07.2009 ©Velleman nv

±3.5% rdg ±2°C (from –20°C to

+750°C)

±3% rdg ±2°F (from –4°F to +200°F)

±3.5% rdg ± 2°F (from –4°F to

+1400°F)

Input Protection 60V DC or 24V AC rms

Use this device with original accessories only. Velleman nv

cannot be held responsible in the event of damage or injury

resulted 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.

This manual is copyrighted. 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.

01.07.2009

1. Inl

Aan all

Belangr

een loka

milieuwe

Hebt u

betreff

Dank u

toestel i

transpor

geldt nie

deze ha

voor def

Dit multi

die van

U kunt h

Gebruik

luchthav

auditoriu

Het toes

te mete

van het l

met lang

Meet te

halfgelei

Meet de

Geb

iding

ingezetenen

ijke milieu-in

Dit symbool

als het na zij

schade kan t

eventuele ba

afval; het m

voor recycla

l recyclagepun

tgeving.

ragen, conta

nde de verwij

oor uw aankoo

gebruik neem

, installeer het

voor schade d

dleiding en uw

cten of proble

unctionele toe

ecibelmeter, li

t zowel thuis

et toestel als

n, enz. U kunt

ms, studio’s en

el is geschikt a

. Het toestel h

icht. De lichtge

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! Lees deze h

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en die hier re

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de heersende

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bouwde halfgel

Rev.

©Velleman

duct

geeft aan dat,

rpen, dit toeste

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ijf terechtkom

erdeler of naa

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oriteiten

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thermometer.

toor, op de

happen van

lichtintensiteit

de invalshoek

stabiele diode

rgevoelige

eider.

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