METREL MD 9225 User manual

METREL MD 9225

Most Complete Industrial TRMS AC/DC

Current Clamp Meter

MD 9225

User Manual

Bedienungsanleitung

Version 1.2, Code no. 20 752 001

Distributor:

METREL d.d.

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 this equipment meets the requirements of the EC

(European Community) regulations concerning safety and electromagnetic compatibility.

No part of this publication may be reproduced or utilized in any form or by any means

without permission in writing from METREL.

MD 9225 Clamp Meter Series Table of contents / Inhalt

Table of contents/ Inhalt

English

1 Safety ...........................................................................................................................4

2 Cenelec Directives........................................................................................................6

3 Product Description ......................................................................................................7

4 Operation......................................................................................................................8

5 Specifications..............................................................................................................14

6 Maintenance...............................................................................................................18

Deutsch

1.Sicherheitsbestimmungen ..........................................................................................20

2 Cenelec-Richtlinien.....................................................................................................22

3 Produktbeschreibung..................................................................................................23

4 Betrieb........................................................................................................................24

5 Spezifikationen ...........................................................................................................30

6 Wartung......................................................................................................................34

MD 9225 Clamp Meter Series Safety

1 Safety

This manual contains information and warnings that must be followed for operating the

instrument safely and maintaining the instrument in a safe operating condition. If the

instrument is used in a manner not specified by the manufacturer, the protection

provided by the instrument may be impaired.

The meter protection rating, against the users, is double insulation per IEC/UL/EN61010-

1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031

Ed. 1.1 and CAN/CSA-C22.2 No. 61010-1-12 Ed. 3.0 to Category III 600Volts AC & DC.

PER IEC61010 OVERVOLTAGE INSTALLATION CATEGORY

OVERVOLTAGE CATEGORY II

Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be

supplied from the fixed installation.

Note –Examples include household, office, and laboratory appliances.

OVERVOLTAGE CATEGORY III

Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations.

Note –Examples include switches in the fixed installation and some equipment for

industrial use with permanent connection to the fixed installation.

OVERVOLTAGE CATEGORY IV

Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation.

Note –Examples include electricity meters and primary over-current protection

equipment.

TERMS IN THIS MANUAL

WARNING identifies conditions and actions that could result in serious injury or even

death to the user.

CAUTION identifies conditions and actions that could cause damage or malfunction in

the instrument.

WARNING

To reduce the risk of fire or electric shock, do not expose this product to rain or moisture.

The meter is intended only for indoor use.

To avoid electrical shock hazard, observe the proper safety precautions when working

with voltages above 60 VDC or 30 VAC rms. These voltage levels pose a potential

shock hazard to the user.

Keep your hands/fingers behind the hand/finger barriers (of the meter and the test leads)

that indicate the limits of safe access of the hand-held part during measurement.

Inspect test leads, connectors, and probes for damaged insulation or exposed metal

before using the instrument. If any defects are found, replace them immediately. Only

use the test lead provided with the equipment or UL Listed Probe Assembly with same

rating or better.

MD 9225 Clamp Meter Series Safety

This Clamp-on meter is designed to apply around or remove from uninsulated

hazardous live conductors. But still, individual protective equipment must be used if

hazardous live parts in the installation where measurement is to be carried out could be

accessible.

CAUTION

Disconnect the test leads from the test points before changing meter functions.

INTERNATIONAL ELECTRICAL SYMBOLS

Caution ! Refer to the explanation in this Manual

Caution ! Risk of electric shock

Earth (Ground)

Double Insulation or Reinforced insulation

Fuse

AC--Alternating Current

DC--Direct Current

Application around and removal from hazardous live conductors is

permitted

MD 9225 Clamp Meter Series Cenelec Directives

2 Cenelec Directives

The instruments conform to CENELEC Low-voltage directive 73/23/EEC and

Electromagnetic compatibility directive 89/336/EEC

MD 9225 Clamp Meter Series Product Description

3 Product Description

This user's manual uses only representative model(s) for illustrations. Please refer

specification details for function availability to each model.

1) To reduce the risk of fire or electric

shock, do not expose this product to rain or

moisture. The meter is intended only for

indoor use.

To avoid electrical shock hazard, observe

the proper safety precautions when

working with voltages above 60 VDC or 30

VAC rms. These voltage levels pose a

potential shock hazard to the user.

Keep your hands/fingers behind the

hand/finger barriers (of the meter and the

test leads) that indicate the limits of safe

access of the hand-held part during

measurement. Inspect test leads,

connectors, and probes for damaged

insulation or exposed metal before using

the instrument. If any defects are found,

replace them immediately.

This Clamp-on meter is designed to apply

around or remove from uninsulated

hazardous live conductors. But still,

individual protective equipment must be

used if hazardous live parts in the

installation where measurement is to be

carried out could be accessible.

2) Hand/Finger Barrier to indicate the limits

of safe access of the meter during

measurement

3) Push-buttons for special functions &

features

4) Input Jack for all functions EXCEPT

non-invasive ACA & DCA current functions

5) Common (Ground reference) Input Jack

for all functions EXCEPT non-invasive

ACA & DCA current functions

6) Slide-switch Selector to turn the power

ON/OFF and Select a function

7) 3-3/4 digits 4000 counts LCD display

8) Jaw trigger for opening the clamp jaw

9) DCA direction for + polarity as well as

Jaw center Indicator, at where best ACA &

DCA accuracy is

MD 9225 Clamp Meter Series Operation

4 Operation

CAUTION: Before and after hazardous voltage measurements, test the voltage function

on a known source such as line voltage to determine proper meter functioning.

DC Voltage, AC Voltage, Hz Frequency functions

Set slide-switch to Voltage function position. Inputs are made through the test leads

terminals. Press SELECT button momentarily to select DC voltage.

Press the Hz button momentarily to activate Hz Frequency. The Hz trigger level is

determined by the selected function-range from where the Hz function is activated. In

ACV function, activating the Hz function during significant measurements can get the

most appropriate trigger level to avoid electrical noises in most cases. Electrical noise

may cause unstable Hz reading. Activating the Hz function at AC 4.000V range (before

making significant measurements) can get lower trigger level (higher sensitivity). Hz

reading may show zero when the sensitivity is insufficient.

Note: DC 400.0mV range is designed with 1000Mhigh input impedance for least

MD 9225 Clamp Meter Series Operation

current drain in measuring small signals, and can cope better with most commercially

available voltage output transducers/adapters. The non-zero display reading is normal

when the meter inputs are open circuit, which will not affect actual measurement

accuracy. The meter will show close-to-zero readings when the inputs are shorted.

Open input is actually a floating condition, which is not a zero-volt-input condition.

ACA & DCA Current clamp-on function

Inputs are made through the clamp jaws for non-invasive ACA & DCA current

measurements.

CAUTION (Application and removal of the Clamp-on meter)

Press the jaw trigger and clamp the jaws around only one single conductor of a circuit

for load current measurement. Make sure the jaws are completely closed, or else it will

introduce measurement errors. Enclosing more than one conductor of a circuit will result

in differential current measurement (like identifying leakage current). Locate the

conductor(s) at the Jaws center as much as possible to get the best measuring

accuracy. The jaw “+” mark indicates current flow direction on DCA positive readings.

For removal, press the jaw trigger and remove the jaws from the conductor(s).

MD 9225 Clamp Meter Series Operation

Note: In DCA measurements, hysteresis of the jaws (after measuring high DC currents)

may introduce non-zero residual readings. Relative Zero mode should be used each

time to offset the residual readings, if any, for more accurate measurements.

Adjacent current-carrying devices such as transformers, motors and conductor wires will

affect measurement accuracy. Keep the jaws away from them as much as possible to

minimize influence.

CAUTION

Do not measure above rated frequency (400Hz). In measuring above rated frequency,

the magnetic circuits may reach to a hazardous temperature.

Resistance, and Continuity functions

CAUTION

Using Resistance, Continuity or Diode function in a live circuit will produce false results

and may damage the instrument. In many cases the suspected component must be

disconnected from the circuit to obtain an accurate measurement reading

Inputs are made through the test leads terminals. Slide-switch on defaults at . Press

SELECT button momentarily to select Continuity function which is convenient for

checking wiring connections and operation of switches. A continuous beep tone

indicates a complete wire.

Table of contents

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