Megger AVO300, AVO310 User Manual

M

AVO300 Series
Digital Multimeters

USER MANUAL

MANUAL DE L’UTILISATEUR

BEDIENUNGSANLEITUNG

MANUAL DEL USUARIO

GSAFETY WARNINGS

The following safety information must be observed to insure maximum personal safety during the operation at this meter:

■ Do not use in wet environments

■ Measurements beyond the maximum selected range must not be attempted.

■ Extreme care must be taken when measuring above 50 V, especially on live bus-bars.

■ To measure voltage, the instrument must not be switched to a current or resistance range, or to the diode check or buzzer position.

■ Circuits must be de-energised and isolated before carrying out resistance tests.

■ The rotary selector switch must only be turned after removing test connections.

■ All external voltages must be disconnected from the instrument before removing the battery.

■ Test leads and prods must be in good order, clean, and with no broken or cracked insulation.

■ UK Safety Authorities recommend the use of fused test leads when measuring voltage on high energy systems.

■ Replacement fuses must be of the correct type and rating.

■ The instrument must not be used if any part of it is damaged.

■ Check for correct instrument operation by testing a known voltage before and after use. Do not use if misleading results are obtained.

■ Warnings and precautions must be read and understood before an instrument is used. They must be observed during the operation of this instrument.

2

Users of this equipment and/or their employers are reminded that National Health and Safety Legislation requires them to carry out valid risk assessments of
all electrical work so as to identify potential sources of electrical danger and risk of electrical injury such as inadvertent short circuits. Where the assessments
show that the risk is significant then the use of fused test leads may be appropriate.

NOTE

THE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS.

Symbols used on the instrument are:

F Caution: risk of electric shock
G Caution: refer to accompanying notes
t Equipment protected throughout by Double

Insulation (Class II))

c Equipment complies with current EU directives.

Equipment complies with ‘C tick’ requirements

CONTENTS

3

Introduction 4

Symbols and annuniciators 4

Operation 4

Mode button 4
Hold button 4
Backlight button (AVO310 only) 4
Max/Min button (AVO310 only) 5
DC Voltage measurements 5
AC Voltage measurements 5
DC Current measurement 5
AC Current measurement 5
Resistance [Ω] measurement 6
Continuity check 6

Diode test 6
Specifications 7
Battery and fuse replacement 10

Battery installation 10

Replacing the fuses 10
Accessories 11
Repairs and warranty 12

MANUAL DE L’UTILISATEUR 13

BEDIENUNGSANLEITUNG 27

MANUAL DEL USUARIO 41

N13117

To turn on the instrument turn the range knob from the OFF position to
any measurement range.

Note: For best battery life ALWAYS turn the function switch to the OFF
position when the meter is not in use. These meters have an Auto OFF
that automatically shuts the meter OFF if left switched on. AVO300:15
minutes, AVO310: 30 minutes.

Note: On some low AC and DC voltage ranges, with the test leads not
connected to a device, the display may show a random, changing reading.
This is normal and is caused by the high-input sensitivity. The reading will
stabilize and give a proper measurement when connected to a circuit.

MODE button

To select AC or DC measurement when in Amps, mA or uA ranges.

HOLD button

The HOLD function allows the meter to "freeze" a measurement for later
reference.

1. Press the HOLD button to "freeze" the reading on the indicator. The
"HOLD" message will be appear in the display.

2. Press the HOLD button again to return to normal operation.

BACKLIGHT button (AVO310 only)

1. Press the BACKLIGHT button to switch on the display light.

2. Press the BACKLIGHT button again to exit the light mode.

INTRODUCTION OPERATION

4

Thank you for purchasing one of the Megger AVO300 series digital

multimeters.

For your own safety and to get the maximum benefit from your
instrument, please ensure that you read and understand the following
safety warnings and instructions before attempting to use the instrument.

This user guide describes the operation and functions of the following
AVO300 series of digital multimeters.

AVO300

AVO310

SYMBOLS AND ANNUNCIATORS

Continuity

BAT Low Battery

Diode test

HOLD Data Hold

AUTO AutoRanging

AC Alternating Current or Voltage

DC Direct Current or Voltage

MAX/MIN Stores the highest or lowest measurement

Backlight

V Volts

A, mA, uA Current range

decimal point, value and symbol (AC, V, etc.).

DC CURRENT MEASUREMENT

CAUTION: Do not make current measurements on the 10A scale for
longer than 30 seconds. Exceeding 30 seconds may cause damage to the
meter and/or the test leads.

1. Insert the black test lead plug into the negative (COM) jack.

2. For current measurements up to 4000 µA DC, set the function switch to
the uA position and insert the red test lead plug into the (µA) jack.

3. For current measurements up to 400 mA DC, set the function switch to
the mA range and insert the red test lead plug into the (mA) jack.

4. For current measurements up to 10 A DC, set the function switch to the
A position and insert the red test lead plug into the 10 A jack.

5. Press the AC/DC button until "DC" appears in the display.

6. Remove power from the circuit under test, then open up the circuit at
the point where you wish to measure current.

7. Connect the black test probe to the negative side of the circuit. Connect
the red test probe to the positive side of the circuit.

8. Apply power to the circuit.

9. Read the current in the display. The display will indicate the proper
decimal point, value and symbol.

10. Remove power from circuit before disconnecting test leads

5

MAX/MIN button (AVO310 only)

The MAX/MIN function allows the meter to capture the highest or lowest
measurement for later reference.

1. Press the MAX/MIN button to begin measurement. The indicator "MAX"
or MIN will appear in the display.

2. If the "MAX MIN" messages are flashing, the instrument is in MAX/MIN
mode but not recording, press the MAX/MIN button to select a mode.

3. To return to normal AUTO measurement mode, hold down the
MAX/MIN button for 2 seconds.

DC VOLTAGE MEASUREMENTS

1. Set the function switch to the V DC position ("mV" will appear in the
display).

2. Insert the black test lead plug into the negative (COM) jack and the red
test lead plug into the positive (V) jack.

3. Connect the test probe tips to the circuit under test. Be sure to observe
the correct polarity (red lead to positive, black lead to negative).

4. Read the voltage in the display. The display will indicate the proper
decimal point and value. If the polarity is reversed, the display will show
(-) minus before the value.

AC VOLTAGE MEASUREMENTS

1. Set the function switch to the V AC position.

2. Insert the black test lead plug into the negative (COM) jack and the red
test lead plug into the positive (V) jack.

3. Connect the test probe tips to the circuit under test.

4. Read the voltage in the display. The display will indicate the proper

6

AC CURRENT MEASUREMENT

CAUTION: Do not make current measurements on the 10 A scale for
longer than 30 seconds. Exceeding 30 seconds may cause damage to the
meter and/or the test leads.

1. Insert the black test lead plug into the negative (COM) socket.

2. For current measurements up to 10 A, set the function switch to the A
position and insert the red test lead plug into the (10 A) jack.

3. For current measurements up to 400 mA, set the function switch to the
mA range and insert the red test lead plug into the (mA) jack.

4. For current measurements up to 10 A AC, set the function switch to the
A position and insert the red test lead plug into the 10 A jack.

5. Press the MODE button. The measurement mode will change between
AC or DC as required.

6. Remove power from the circuit under test, then open up the circuit at
the point where you wish to measure current.

7. Connect the black test probe to the negative side of the circuit. Connect
the red test probe to the positive side of the circuit.

8. Apply power to the circuit. Read the current in the display. The display
will indicate the proper decimal point, value and symbol.

11. Remove power from circuit before disconnecting test leads

RESISTANCE [Ω] MEASUREMENT

WARNING: To avoid electric shock, disconnect power to the unit under
test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.

1. Set the function switch to the Ω position.

2. Insert the black test lead plug into the negative (COM) socket and the

red test lead plug into the positive Ω jack.

3. Connect the test probe tips across the circuit or part under test. It is
best to disconnect one side of the part under test so the rest of the
circuit will not interfere with the resistance reading.

4. Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.

CONTINUITY CHECK

WARNING: To avoid electric shock, never measure continuity on circuits
or wires that have voltage on them.

1. Set the range switch to the Ω position.

2. Insert the black lead plug into the COM socket and the red test lead
plug into the positive socket.

3. Connect the test probe tips to the circuit or wire you wish to check.

4. If the resistance is less than 30 Ω, the audible signal will sound. The
display will also show the actual resistance in ohms.

DIODE TEST

WARNING: To avoid electric shock, do not test any diode that has voltage
on it.

1. Set the function switch to the position.

2. Insert the black test lead plug into the COM socket and the red test lead
plug into the socket.

3. Connect the test probe tips to the diode or semiconductor junction you
wish to test. Note the meter reading.

4. Reverse the probe polarity by switching probe position. Note this
reading.

Insulation: Class 2, Double insulation.

Overvoltage category: (AVO300/310)

600V CATIII or 1000V CATII

Display

AVO300: 4000 counts LCD display, 25.4mm high

AVO310: 4000 counts LCD display, 20mm high

Backlight: AVO310 only

Polarity: Automatic, (-) negative polarity indication.

Over-range: "OL" mark indication.

Low battery indication: A Battery symbol is displayed when the

battery voltage drops below the operating

level.

Measurement rate: 2 times per second nominal.

Auto power off

AVO300: Meter automatically shuts down after

approx. 15 minutes of inactivity.

AVO310: Meter automatically shuts down after

approx. 30 minutes of inactivity.

Operating environment: -10ºC to 50ºC (14ºF to 122ºF) at <70%

relative humidity.

Storage temperature: -30ºC to 60ºC (-4ºF to 140ºF) at < 80%

relative humidity.

5. The diode or junction can be evaluated as follows:
A. If one reading shows a value and the other reading shows OL, the

diode is good.
B. If both readings show OL, the device is open.
C. If both readings are very small or zero, the device is shorted.
NOTE: The value indicated in the display during the diode check is the

forward voltage.

7

SPECIFICATIONS

8

Accuracy

Accuracy is given at 18ºC to 28ºC (65ºF to 83ºF), less than 70% RH

DC Voltage (Auto-ranging)
Range Resolution Accuracy

400.0 mV 0.1 mV ±0.5% of rdg ±2 digits

4.000 V 1 mV

40.00 V 10 mV ±0.8% of rdg ±2 digits

400.0 V 100 mV

1000 V 1 V ±1% of rdg ±2 digits

Input Impedance: 7.8 MΩ.

Maximum Input: 1000 V dc

AC Voltage (Auto-ranging)

Range Resolution Accuracy

400.0 mV

(AV0310 only) 0.1 mV

4.000 V 1 mV ±1%of rdg ±5 digits

40.00 V 10 mV

400.0 V 100 mV

1000 V 1 V ±1.5%of rdg ±5 digits

400 mV (AVO310 only)
Input Impedance: 7.8 MΩ.
AC Response: 50Hz 60Hz
Maximum Input: 1000 V AC rms.

Relative humidity: 90% (0ºC to 30ºC); 75% (30ºC to 40ºC);

45% (40ºC to 50ºC)

For inside use, max height:

Operating: 3000 m

Storage: 10,000 m

Pollution degree: 2

Safety

The instrument complies with IEC61010-1 and IEC 61010-031

Power: One 9 V battery, NEDA 1604, IEC 6F22.

Dimensions: 182 (H) x 82 (W) x 55 (D) mm

Weight: Approx. 375g.

EMC

IEC61326-1

Operational uncertainties: Refer to www.megger.com

DC Current (Auto-ranging)

Range Resolution Accuracy

400.0 µA 0.1 µA

4000 µA 1 µA

40.00 mA 10 µA

300.0 mA 100 µA

10 A 10 mA ±2.5% of rdg ±3 digits

Overload Protection: 0.5 A/1000 V and 10 A/1000 V fuse.

Maximum Input: 4000 µA DC on µA range

400 mA DC on mA range

10 A DC on 10 A range

AC Current (Auto-ranging)

Range Resolution Accuracy

400.0 µA 0.1 µA

4000 µA 1 µA

40.00 mA 10 µA

300.0 mA 100 µA

10 A 10 mA ±3.0% of rdg ±5 digits

Overload Protection: 0.5 A/1000 V and 10 A/1000 V fuse.

AC Response: 50 Hz to 400 Hz

Maximum Input: 4000 µA AC rms on µA

400 mA AC rms on mA

10 A AC rms on 10 A range.

Resistance [Ω] (Auto-ranging)

Range Resolution Accuracy

400.0 Ω 0.1 Ω ±0.8% of rdg ±5 digits

4.000 kΩ 1 Ω ±0.8% of rdg ±2 digits

40.00 kΩ 10 Ω

400.0 kΩ 100 Ω

4.000 MΩ 1 kΩ

40.00 MΩ 10 kΩ

Input Protection: 1000 V DC or 1000 V AC rms.

AVO300: Diode Test

Test current Resolution Accuracy

0.3 mA typical/Open <1.5 V 1 mV ±10% of rdg ±5 digits

Open circuit voltage: 1.5 V DC typical

Overload protection: 1000 V DC or 1000 V AC rms.

9

±1.0% of rdg ±3 digits

±1.5% of rdg ±5 digits

±3% of rdg ±8 digits

10

WARNING: To avoid electric shock, disconnect the test leads from any
source of voltage before removing the battery door.

1. When the batteries become exhausted or drop below the operating
voltage, the battery warning symbol will appear in the LCD display. The
battery should be replaced.

2. Follow instructions for installing battery. See the battery installation
section of this manual.

3. Dispose of the old battery properly.

WARNING: To avoid electric shock, do not operate your meter with the
battery cover removed.

BATTERY INSTALLATION

WARNING: To avoid electric shock, disconnect the test leads from any
source of voltage before removing the battery cover.

Do not operate the instrument with the battery cover removed

1. Disconnect the test leads from the meter.

2. Open the battery cover by loosening the screw using a cross head
screwdriver.

3. Insert the battery into battery holder, observing the correct polarity.

4. Put the battery cover back in place. Secure with the two screws.

NOTE: If your meter does not work properly, check the fuses and battery to
make sure that they are still good and that they are properly inserted.

AVO310: Diode Test

Test current Resolution Accuracy

1 mA typical/Open MAX.3 V 1 mV ±10% of rdg ±5 digits

Open circuit voltage: MAX. 3 V DC

Overload protection: 1000 V DC or 1000 V AC rms.

Audible continuity

Audible threshold: AVO300: Less than 10 Ω to 30 Ω

Test current: MAX. 0.3 mA

AVO310: Less than 35 Ω Test current MAX. 1.5 mA

Overload protection: 1000 V DC or 1000 V AC rms.

BATTERY AND FUSE REPLACEMENT

11

ACCESSORIES

REPLACING THE FUSES

WARNING: To avoid electric shock, disconnect the test leads from any
source of voltage before removing the fuse/battery cover.

1. Disconnect the test leads from the meter and any item under test.

2. Open the fuse door by loosening the screw on the door using a cross
head screwdriver.

3. Remove the old fuse from its holder by gently pulling it out.

4. Install the new fuse into the holder.

5. Always use a fuse of the proper size and value (0.5 A/1000 V fast blow for
the 400 mA range, 10 A/1000 V fast blow for the 10 A range).

6. Put the fuse door back in place. Insert the screw and tighten it securely.

WARNING: To avoid electric shock, do not operate your meter until the
fuse door is in place and fastened securely.

Included accessories

Standard Red/Black lead set with test probes

Optional Accessories

Standard lead set with test probes and croc clips 6220-779

Fused lead set with test probes and croc clips 6220-789

12

REPAIR AND WARRANTY

The instrument contains static sensitive devices, and care must be taken in
handling the printed circuit board. If an instrument’s protection has been
impaired it should not be used, but sent for repair by suitably trained and
qualified personnel. The protection is likely to be impaired if for example; it
shows visible damage; fails to perform the intended measurements; has
been subjected to prolonged storage under unfavourable conditions, or has
been subjected to severe transport stresses.

NEW INSTRUMENTS ARE GUARANTEED FOR 3 YEARS FROM THE

DATE OF PURCHASE BY THE USER.

Note: Any unauthorized prior repair or adjustment will automatically
invalidate the Warranty.

INSTRUMENT REPAIR AND SPARE PARTS

For service requirements for Megger Instruments contact:

Megger Limited or Megger
Archcliffe Road Valley Forge Corporate Centre
Dover 2621 Van Buren Avenue
Kent CT17 9EN Norristown PA 19403
England. U.S.A.

Tel: [phone] Tel: [phone]

Fax: [phone] Fax: [phone]

or an approved repair company.

Returning and Instrument for Repair

If it is necessary to retun an instrument for repair, a returns Authorisation
number must first be obtained by contacting one of the addresses shown.
You will be asked to provide key information, such as the instrument serial
number and fault reported when the number is issued. This will enable the
Service Department to prepare in advance for the receipt of your
instrument, and to provide the best possible service to you.

The Returns Authorisation number should be clearly marked on the outside
of the product packaging, and on any related correspondence. The
instrument should be sent, freight paid to the appropriate address. If
appropriate a copies of the original purchase invoice and of the packing
note, should be sent simultaneously by airmail to expedite clearance
through customs.

For instruments requiring repair outside the warranty period a repair
estimate will be submitted to the sender, if required, before work on the
instrument commences.

Approved Repair Companies

A number of independent instrument repair companies have been
authorised for repair work on most Megger instruments, using genuine
Megger spare parts. A list of approved companies is available from the UK
address shown on this page. Spare parts are also available.

13

M

Multimètres numériques Série AVO300

MANUAL DE L’UTILISATEUR

14

GCONSIGNES DE SÉCURITÉ

Les informations ci-après relatives à la sécurité doivent être respectées pour assurer aux personnes une sécurité maximale pendant le fonctionnement de cet
appareil de mesure.

■ N’utilisez pas l’appareil dans des environnements humides

■ N’essayez pas de réaliser des mesures au-delà de la plage maximale sélectionnée.

■ Une précaution toute particulière doit être apportée lorsque vous effectuez des mesures au-dessus de 50 V., notamment sur des barres conductrices de

courant sous tension.

■ Pour mesure la tension, l’instrument ne doit pas être commuté sur une gamme de courant ou de résistance, ou sur la position de contrôle de diode ou

de testeur de continuité.

■ Les circuits doivent impérativement être mis hors tension et isolés avant d’effectuer des essais de résistance.

■ Le sélecteur rotatif ne doit être tourné qu’après le retrait des connexions de test.

■ Toutes les tensions externes doivent être déconnectées de l'instrument avant le retrait de la pile.

■ Les cordons de test et les contacts doivent être en bon état, propres , et l’isolant ne doit pas être brisé ou fissuré.

■ Les autorités britanniques responsables de la sécurité recommandent d’utiliser des connexions de test à fusible lors de la mesure de la tension sur des

systèmes haute énergie.

■ Des fusibles de remplacement doivent avoir le type et les caractéristiques appropriés.

■ L’instrument ne doit pas être utilisé si l’une de ces parties, quelle qu’elle soit, est endommagée.

■ Vérifiez le bon fonctionnement de l’appareil en testant une tension connue avant et après l’utilisation. Ne pas l’utiliser si vous obtenez des résultats

erronés.

■ Il faut impérativement lire et comprendre tous les avertissements et les précautions avant d'utiliser un instrument. Ces avertissements et précautions

doivent être observés pendant le fonctionnement de cet instrument.

La législation en vigueur sur la sécurité et la santé impose aux utilisateurs de ces équipements d’effectuer une évaluation des risques sur tous les travaux
électriques, afin d’identifier les sources potentielles de danger et les risques d’accidents tels que les court-circuits. Si cette évaluation révèle un niveau de
risque significatif, l’utilisation de câbles de test protégés par fusibles peut être nécessaire.

NOTA

CET APPAREIL NE DOIT ÊTRE UTILISÉ QUE PAR DES PERSONES COMPÉTENTES ET SPÉCIALEMENT FORMÉES

15

SOMMAIRE

INTRODUCTION 16

SYMBOLES ET INDICATEURS D’ALARME 16

FONCTIONNEMENT 16

Bouton MODE 16
Bouton GEL 16
Bouton RÉTROÉCLAIRAGE (uniquement AVO310) 17
Bouton MAX/MIN (uniquement AVO310) 17
MESURES DE TENSION DE CC 17
MESURES DE TENSION DE CA 17
MESURE DE COURANT CA 17
MESURE DE LA RÉSISTANCE [ Ω ]18
CONTRÔLE DE CONTINUITÉ 18

TEST DE DIODE 18
CARACTÉRISTIQUES 19
Remplacement de la PILE et du FUSIBLE 22

MISE EN PLACE DE LA PILE 22

REMPLACEMENT DES FUSIBLES 22
ACCESSORIES 23
RÉPARATIONS ET GARANTIE 24

Symboles utilisés sur l’appareil:

F

Attention : Risque de choc électrique

G Attention : Consulter les notes d’accompagnement
t

Equipement entièrement protégé par une double
isolation (Classe II)

c Equipement conforme aux directives européennes

applicables

Conformité « C-Tick »

N13117

Merci d’avoir acheté l’un des multimètres numériques Megger de la série
AVO300.

Pour votre propre sécurité et afin de tirer le meilleur parti de votre
instrument, assurez-vous que vous avez lu et compris les avertissements et
les instructions ci-après relatives à la sécurité avant d'essayer d'utiliser
l'instrument.

Ce guide de l’utilisateur décrit le fonctionnement et les fonctions de la série
AVO300 des multimètres numériques indiquée ci-après.

AVO300

AVO310

SYMBOLES ET INDICATEURS D’ALARME

Continuité

BAT Pile faible

Test de diode

GEL Gel de données

AUTO Sélection automatique de gamme

CA Courant ou tension alternatif (ve)

CC Courant ou tension continu (e)

MAX/MIN Stocke la mesure la plus élevée ou la plus basse

Rétroéclairage

V Volts

A, mA, uA Plage de courant

Pour mettre en marche l’instrument, faites passer le sélecteur de plage de la
position ÉTEINTE sur n'importe quelle plage de mesure.

REMARQUE : Pour que votre pile dure plus longtemps, mettez
TOUJOURS le sélecteur de fonctions sur la position ÉTEINTE lorsque vous
n’utilisez pas l'appareil de mesure. Ces appareils de mesure ont une
fonction ARRÊT automatique qui ÉTEINT automatiquement l'appareil de
mesure si vous le laissez allumé. AVO300 :15 minutes, AVO310 : 30 minutes.

REMARQUE: Sur certaines plages de tension CA et CC faibles, avec les
cordons de test non raccordées à un appareil, l'écran peut afficher un relevé
changeant et aléatoire. Cela est normal et tient à la sensibilité d’entrée
élevée. Le relevé se stabilisera et l’appareil de mesure effectuera un relevé
approprié lorsqu’il sera relié à un circuit.

Bouton MODE

Ce bouton sert à sélectionner une mesure CA ou CC lorsque vous êtes dans
les plages ampères, milliampère et microampère.

Bouton GEL

La fonction GEL permet à l’appareil de mesure de « figer » une mesure pour
la consulter ultérieurement.

1. Appuyez sur le bouton GEL pour « figer » le relevé sur l’indicateur. Le
message « GEL » s’affichera.

2. Appuyez une nouvelle fois sur le bouton GEL pour revenir au
fonctionnement normal.

16

INTRODUCTION FONCTIONNEMENT