Velleman DVM401 User manual

DVM401

3 ½-DIGIT 4-IN-1 DMM

3 ½-DIGITS DIGITALE METER 4-IN-1

MULTIMÈTRE 4-EN-1 3 ½ DIGITS

MULTÍMETRO DIGITAL DE 3 ½ DÍGITOS 4 EN 1

3 ½-STELLIGES DIGITALMULTIMETER 4-IN-1

MULTIMETR CYFROWY „4-W-1” - 3 ½ CYFRY

USER MANUAL 4

GEBRUIKERSHANDLEIDING 11

NOTICE D’EMPLOI 18

MANUAL DEL USUARIO 25

BEDIENUNGSANLEITUNG 32

INSTRUKCJA OBSŁUGI

DVM401 Rev. 2

9. 1.2 14 ©Velleman nv

re 1

DVM401 Rev. 2

9. 1.2 14 ©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 the Velleman! Please read the manual

thoroughly before bringing this device into service. If the device was

damaged in transit, don't install or use it and contact your dealer.

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.

This device combines the functions of sound level meter, light meter,

humidity meter and temperature meter and can be used both

professionally and at home.

The sound level function can be used to measure sound levels in

schools, offices, airports, etc. and to check the acoustics of

auditoriums, studios and hi-fi installations.

The light function is used to measure luminous intensity. The device

automatically compensates for the angle of incidence. The light-

sensitive component is a very stable long-life diode.

Measure temperatures using the built-in temperature-sensitive

semiconductor or the K-type thermocouple.

Perform relative humidity measurements with the built-in

semiconductor.

The humidity and temperature measuring function is for use a

humidity/semiconductor sensor and K-type thermocouple.

DVM401 Rev. 2

9. 1.2 14 ©Velleman nv

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 . 1 to 2 Lux

•sound level range (resolution .1dB)

A-weighting LO (low) : 35 – 1 dB

A-weighting HI (high) : 65 – 13 dB

C-weighting LO (low) : 35 – 1 dB

C-weighting HI (high) : 65 – 13 dB

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

resolution .1%RH

•temperature measuring levels from –2 °C to +75 °C / -4°F to

+14 °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

1 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

1 .Temperature terminal: insert the temperature probe in this

terminal

DVM401 Rev. 2

9. 1.2 14 ©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 3 Hz and 1 kHz.

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

peak values.

6. The sound level is displayed.

Note: strong winds (> 1 m/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: 2 , 2 , 2 , 2 Lux.

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

avelength (Nm)

DVM401 Rev. 2

9. 1.2 14 ©Velleman nv

8. Recommended illumination: see table below.

At the Office

conference room, reception area

–

clerical work

–

typing

–

In a Factory

packing work

–

production lines

–

inspection work

–

electronic parts assembly line

–

In a Hotel

public room, cloakroom

–

reception

–

Store

staircase

–

show window

front of show window

–

Hospital

sick room, warehouse

operating

room

–

School

auditorium, gymnasium

–

classroom

–

library, laboratory

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 .1°C or 1°C and 1°F or .1°F.

3. Read the measured value from the display.

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

DVM401 Rev. 2

9. 1.2 14 ©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: .1°C, 1°C, .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 -1 °C to 6 °C (14°F to 14 °F)

Auto Power Off after ± 1 minutes of inactivity

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

Dimensions 251 x 63.8 x 4 (H x W x D)

Dimensions Photo detector 115 x 6 x 27mm

DVM401 Rev. 2

9. 1.2 14 ©Velleman nv

SOUND

Sound Level Measurement Range

A-weighting LO (low): 35 – 1 dB

A-weighting HI (high): 65 – 13 dB

C-weighting LO (low): 35 – 1 dB

C-weighting HI (high): 65 – 13 dB

resolution .1dB

Typical Frequency Range 3 Hz to 1 KHz

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 2 , 2 , 2 , 2 Lux (2 Lux

reading x 1 )

Overrange Indication “1”

Accuracy ±5% of reading + 1 digits (calibrated

with standard incandescence lamp at a

colour temperature of 2856K)

Thermal sensitivity ± .1°C

Photo detector silicon photo diode with filter

HUMIDITY/TEMPERATURE

Humidity Measurement Range 25 to 95%RH

Temperature Range -2 °C to +5 °C (-4°F to +122°F) with

built-in temperature sensor

-2 to +2 °C (-4°F to +2 °F) for

low range

-2 to +75 °C (-4°F to +14 °F) for

high range

Resolution .1%RH, .1°C/ .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 –2 °C to

+2 °C)

DVM401 Rev. 2

9. 1.2 14 ©Velleman nv

±3.5% rdg ±2°C (from –2 °C to

+75 °C)

±3% rdg ±2°F (from –4°F to +2 °F)

±3.5% rdg ± 2°F (from –4°F to

+14 °F)

Input Protection 6 V 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.

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