METREL MD 9272 Manual de usuario

MD 9272 Leakage Clamp Meter with Power

Functions

MD 9272

Instruction manual

Bedienungsanleitung

Version 2.2.11; Code 20 752 381

Distributor:

METREL d.o.o.

Ljubljanska cesta 77

1354 Horjul

SLOVENIA

E-mail: [email protected]

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

Metrel GmbH

Mess und Prüftechnik

Orchideenstrasse 24

90542 Eckental -Brand

Germany

E-mail: [email protected]

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

Metrel UK Ltd.

Test & Measurement

Unit 16, 1st Qtr Business Park

Blenheim Road

Epsom

Surrey

KT19 9QN,

Great Britain

E-mail: [email protected]

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

Mark on your equipment certifies that it meets requirements of all

subjected EU regulations.

Die Kennzeichnung auf Ihrem Gerät bestätigt, dass es den Anforderungen

aller geltenden EU-Vorschriften entspricht.

Oznaka na tej opremi potrjuje, da ta oprema ustreza zahtevam vseh EU

Hereby, Metrel d.d. declares that the MD 9272 is in compliance with

subjected EU directive. The full text of the EU declaration of conformity is

available at the following internet address http://www.metrel.si/DoC.

Hiermit erklärt Metrel d.d., dass der MD 9272 den geltenden EU-

Richtlinien entspricht. Der vollständige Text der EU-

Konformitätserklärung ist unter der folgenden Internetadresse

https://www.metrel.si/DoC verfügbar.

Metrel d. d. izjavlja, da je MD 9272 v skladu z direktivo EU. Polno besedilo

https://www.metrel.si/DoC.

Mark on your equipment certifies that it meets requirements of all

subjected UK regulations.

Hereby, Metrel d.d. declares that the MD 9272 is in compliance with

subjected UK regulations. The full text of the UK declaration of conformity

is available at the following internet address https://www.metrel.si/UK-

DoC.

The trade names Metrel®, Smartec®, Eurotest®, Auto Sequence®are trademarks registered in

Europe and other countries.

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

permission in writing from METREL.

MD 9272 Leakage Clamp Meter Contents/Inhalt/Vsebina 
 
4
Contents/Inhalt/Vsebina 
 
English 
General Instructions............................................................................................................5 
Instrument Description .......................................................................................................7
Description of Functions ................................................................................................... 12 
Data Hold and Recording Mode.........................................................................................18
Technical Specifications.................................................................................................... 19
Maintenance .....................................................................................................................23
Limited Warranty..............................................................................................................24 
 
Deutch 
Allgemeine Anweisungen..................................................................................................25
Gerätebeschreibung ..........................................................................................................27 
Beschreibung der Funktionen............................................................................................32
Datenspeicherungsmodus.................................................................................................39
Technische Daten..............................................................................................................40 
Wartung............................................................................................................................44 
Begrenzte Gewährleistung ................................................................................................45
 
Slovensko 
...............................................................................................................46
Opis instrumenta ..............................................................................................................48
Opis funkcij .......................................................................................................................52
.............................................................................................58
................................................................................................................59 
.......................................................................................................................62 
Garancijska izjava..............................................................................................................63 
 

MD 9272 Leakage Clamp Meter General Instructions

1. General Instructions

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

safetyrequirementsfortheelectronicmeasuringequipmentandcurrentmeasuringclamps.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

Iftheclamp-meterisusedinamannernotspecifiedinthis ,theprotection

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 ifany 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.

Exerciseextremecautionwhenworkingnearbareconductorsorbus-bars.Anyaccidental

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 thefixed installation.

MD 9272 Leakage Clamp Meter 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 itscomponents.

Earth.

Complies with European Union Directives.

Complies with UK regulations.

This equipment hasdouble insulation.

Allows use with dangerous voltage conductors.

Instructions

Before openingthe equipment,theinstrumentshallbedisconnectedfrom anysourceof

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

rotaryswitchtoAorVpositionandverification ofa doublebeep andthe 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 theinstructions in this manual.

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 abnormaloperation and/or performance, the equipment shall not be used

until it has been repaired and verified.

The batteryshallberemoved fromtheclamp-meter ifitisnot goingto beused foralong

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.

MD 9272 Leakage Clamp Meter Instrument Description

2.Instrument Description

Become familiar with the equipment

1 Transformer jaws

2 Protection ring

3 Jaw opening trigger

4Function switch

5Keypad

6LCD display

7Terminals

Transformer clamps

Capture alternating current flowing through theconductor. Direct current cannot be measured.

Keyboard

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

MD 9272 Leakage Clamp Meter 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 ofminimum 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 ofharmonics 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.

MD 9272 Leakage Clamp Meter 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 inreference to the

voltage.

Indicates that the current is in front comparedto 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 themeasured 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

Milliamperes, Amperes.

Volts.

VAr, kVAr

Reactive Volt amperes, Reactive Kilovolt amperes. Reactive power

measuring units.

VA, kVA

Volt amperes, Kilovolt amperes. Apparent powermeasuring units.

W, kW

Watts, Kilowatts. Active power measuring units.

Measurement of a percent value.

MD 9272 Leakage Clamp Meter Instrument Description

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: Input

Measuring power Measuring current Measuring voltage

Standby Mode

Iftheclamp-meterisnotusedforaperiodof15minutes,thescreenwillgoblankandtheclamp-

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.

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.

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