METREL MD 9272 Manual de usuario

Leakage Clamp TRMS Meter with

Power Function

MD 9272

Instruction manual

Bedienungsanleitung

Version 2.1.2; Code 20 752 381

KOMETEC Karl Oelkers e.K.

Mess- und Prüfgeräte · Shop

Mozartstr. 10 · D-88097 Eriskirch

T: 07541 / 955-1313 · F: 07541 / 955-1131

[email protected] · www.kometec.de

Distributor:

METREL d.d.

Ljubljanska cesta 77

1354 Horjul

Slovenia

E-mail: metrel@metrel.si

web site: http://www.metrel.si/

Metrel GmbH

Mess und Prüftechnik

Orchideenstrasse 24

90542 Eckental -Brand

Germany

E-mail: metrel@metrel.de

Internet: http://www.metrel.de/

Metrel UK

Test & Measurement

Unit 16, 1st Qtr Business Park Blenheim Road

Epsom

Surrey

KT19 9QN, GREAT BRITAINE-mail: info@metrel.co.uk

Internet: http://www.metrel.co.uk/

Mark on your equipment certifies that this equipment meets the requirements of all EU

(European Union) related regulations.

No part of this publication may be reproduced or utilized in any form or by any means without

permission in writing from METREL.

MD9272 Leakage Clamp TRMS Meter with Power Function

Contents

English

1. General Instructions..................................................................................................4

2. Instrument Description..............................................................................................6

3. Description of Functions..........................................................................................11

4. Data Hold and Recording Mode..............................................................................18

5. Technical Specifications..........................................................................................19

6. Maintenance............................................................................................................22

Deutsch

1. Allgemeine Anweisungen........................................................................................24

2. Gerätebeschreibung................................................................................................26

3. Beschreibung der Funktionen .................................................................................31

4. Datenspeicherungsmodus ......................................................................................38

5. Technische Daten...................................................................................................39

6. Wartung ..................................................................................................................44

Slovensko

1. Splošna navodila.....................................................................................................46

2. Opis instrumenta.....................................................................................................48

3. Opis funkcij..............................................................................................................52

4. Načini zadrževanja podatkov ..................................................................................58

5. Tehnični podatki......................................................................................................59

6. Vzdrževanje ............................................................................................................62

7. Garancijska izjava...................................................................................................63

MD9272 Leakage Clamp TRMS Meter with Power Function General Instructions

1.General Instructions

This instrument has been designed in accordance with IEC 61010 series standards that

regulate safety requirements for the electronic measuring equipment and current

measuring clamps. The user manual shall be read carefully in order to get the best

results from this equipment. Safety instructions shall always be followed.

Safety measures

General

•If the clamp-meter is used in a manner not specified in this user’s manual, the

protection provided by the equipment may be impaired!

•This equipment can be used to carry out measurements in the CAT.III1600V

environment.

•When using this clamp meter, the user should comply with all the safety

measures regarding:

- Protection against the electric current hazards.

- Protection of the clamp A-meter against incorrect use.

- Protection against electric shock hazard.

•For operator security, only the test probes supplied with the instrument shall be

used.

Do not use the clamp-meter and its accessories if any damage is detected!

During use

•Before carrying out any measurements, the instrument shall be warmed up for at

least 30 seconds.

•If the clamp-meter is used near any high level noise source, the screen might

become unstable or there may appear errors in display.

•The maximum limits of the input value shown in the technical specification tables

shall not be exceeded in order to avoid damage to the equipment.

•The rotary switch shall be in the correct position before starting a new

measurement.

•Exercise extreme caution when working near bare conductors or bus-bars. Any

accidental contact with the bare conductor may cause an electric shock.

•Work carefully with voltages higher than 60 VDC. or 30 VACrms to avoid a risk of

electric shock.

•The test probe(s) shall be disconnected from the circuit that is being tested

before changing the function.

•During measurement fingers shall always be kept behind the protection guard

(check point 2 of this manual)

•The battery shall be changed when the symbol is shown in order to avoid

incorrect measurement readings.

(1): Measurement protective category III covers measurements performed in the building installation.

Examples are measurements on distribution boards, circuit-breakers, wiring, including cables, bus-bars,

junction boxes, switches, socket-outlets in the fixed installation, equipment for industrial use, and some

other equipment, for example, stationary motors with permanent connection to the fixed installation.

MD9272 Leakage Clamp TRMS Meter with Power Function General Instructions

Symbols

The symbols used in this manual and in the equipment are as follows:

Warning: check the instruction manual. Any incorrect use may cause damage to the

equipment or its components.

Earth

Complies with European Union Directives.

This equipment has double insulation.

Allows use with dangerous voltage conductors.

Instructions

•Before opening the equipment, the instrument shall be disconnected from any

source of electricity supply and it shall be ensured that the operator is free from

static electricity, as this could damage or destroy the internal components.

•Before using this equipment it shall be checked for proper operation; by turning

the rotary switch to A or V position and verification of a double beep and the

display activity.

•Any adjustment, repair or maintenance work on the clamp A-meter must only be

carried out by a qualified person, always taking into account the instructions in

this manual.

•A “qualified person” means somebody familiar with the installation, construction

and operation of the equipment, and with the risks implied. This person should be

trained and authorized to charge and discharge energy from the circuits and the

equipment in accordance with established practice.

•When the equipment is open, some internal components can retain dangerous

power, even after the equipment has been disconnected from the mains or

battery electricity supply.

•In the case of abnormal operation and/or performance, the equipment shall not

be used until it has been repaired and verified.

•The battery shall be removed from the clamp-meter if it is not going to be used

for a long period, and shall not be stored at a high temperature or in a humid

environment.

WARNING

This equipment is designed according to EMC standards for portable measuring and

test instruments. Regardless, it is recommended to disconnect the test leads during

clamp measurements, as a high radiofrequency electromagnetic field might be present,

which can negatively affect the accuracy of the measurement.

MD9272 Leakage Clamp TRMS Meter with Power Function Instrument Description

2.Instrument Description

Become familiar with the equipment

1 Transformer jaws

2 Protection ring

3 Jaw opening trigger

4 Function switch

5 Keypad

6 LCD display

7 Terminals

Transformer clamps

Capture alternating current flowing through the conductor. Direct current cannot be

measured.

Keyboard

The keyboard consists of four push buttons. Table 1 describes the function of each one.

MD9272 Leakage Clamp TRMS Meter with Power Function Instrument Description

Table 1. Keyboard

Key

Use

Function

F –Function

Any position of the

rotary switch

Function selection key. Depending on the

rotary switch position, the functions will

vary (refer to chapter 3).

Pressing this button cycles through the

various functions.

A and V, in the

RMS function only

Pressed for more than 2 s, alternates the

second display information from THD to

Hz.

H –Hold

Any position of the

rotary switch in all

the functions

except in PEAK

function

When pressed the memory mode is

activated and the value on screen kept

from updating.

Pressed again, the MAX mode is

activated for the register of maximum

values.

Next pressed, the MIN mode is activated

for the register of minimum values.

Pressed again returns to the normal

mode.

Light

Any position of the

rotary switch, in all

the functions

With a long press of the key (more than 2

s) the LCD screen back illumination is

turned on. 30 s after any button was

pressed, it switches off automatically.

Auto

A and V, in the

RMS function only

Cycles through manual ranges until the

Autorange is active again.

A and V in the

harmonic

measurement

function

Increases the number of harmonics to be

measured.

AC/DC

V, in the RMS

function only

Alternates between VAC. and VDC

measurements.

A and V in the

harmonic

measurement

function

Decreases the number of harmonics to be

measured.

Table 2. Rotary switch positions

Position

Function

OFF

OFF position.

Measurement of AC current up to 100 A.

Measurement of AC or DC voltage up to 600 V.

Measurement of power of up to 60 kVA, with limit at 100 A

and 600 V.

MD9272 Leakage Clamp TRMS Meter with Power Function Instrument Description

LCD Screen

Data hold indication.

Maximum reading indication.

Minimum reading indication.

PEAK

Peak function, this is the fast sampling for maximum value of the

measured quantity, whether voltage or current.

Measurement of the phase angle of the current in reference to the

voltage.

Indicates that the current is in front compared to the voltage.

Indicates that the current is behind compared to the voltage.

Indication of loss, possibly due to insulation defects, only in the mA

measurement mode.

Indication of loss, possibly due to insulation defects and

accumulation of non-linear loads, only in the mA measurement

mode.

Indication of loss, possibly due to a high accumulation of non-linear

loads, only in the mA measurement mode.

Indication that the measured magnitude is expressed as a true

effective value.

Crest factor measurement function is active for the given mode (V or

A).

AC input indication.

DC input indication.

mA, A

Miliamperes, Amperes.

Volts.

MD9272 Leakage Clamp TRMS Meter with Power Function Instrument Description

VAr, kVAr

Reactive Volt amperes, Reactive Kilovolt amperes. Reactive power

measuring units.

VA, kVA

Volt amperes, Kilovolt amperes. Apparent power measuring units.

W, kW

Watts, Kilowatts. Active power measuring units.

Measurement of a percent value.

THD

Total harmonic distortion ratio

Power factor.

HARMONIC

Indication of the measured harmonic.

Hertz, frequency measurement unit.

Indication that range is selected automatically.

Full battery.

Medium battery.

Low battery.

Battery is close to be discharged

Input

Table 3 shows the information on input.

Table 3: Input

Input

Description

COM

Input received by the black test probe as common reference.

Input received by the red test probe for the voltage and power

measurements.

Measuring power Measuring current Measuring voltage

MD9272 Leakage Clamp TRMS Meter with Power Function Instrument Description

Standby Mode

If the clamp-meter is not used for a period of 15 minutes, the screen will go blank and

the clamp-meter will go into standby mode. To wake the clamp-meter from standby

mode, the rotary switch needs to be turned to the OFF position and then back to the

function to reactive the screen.

Accessories

•Test probes

•Batteries (2 AA 1,5V batteries)

•Instruction manual

•Carrying Case

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