NARDA Nbm-520 Manuel utilisateur

NBM-520

Narda Broadband Field Meter

Operating Manual

Narda Safety Test Solutions GmbH

Sandwiesenstraße 7

72793 Pfullingen, Germany

Order no.: 2403/98.21

Edition: 02/07.12, A...

Previous edition: 01/07.03, A...

Subject to change.

Our normal guarantee and delivery terms

apply.

Printed in Germany

Narda NBM-520 i

Contents

1 Useful information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1 Measuring electromagnetic fields . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 About this instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3 About this operating manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Characters and symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Using this operating manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3 Improper use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.4 Dangers from electromagnetic fields . . . . . . . . . . . . . . . . . . . . . . 9

Strong Fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Measurement Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Probe is not operating properly. . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.5 Dangers when handling rechargeable batteries . . . . . . . . . . . . . 10

2.6 Dangers from AC adapter/charger . . . . . . . . . . . . . . . . . . . . . . . 10

3 Preparing the NBM-520 for use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1 Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Items included. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Transport damage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Equipping the case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

After transport and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2 Instrument overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.3 Using rechargeable batteries and the AC Adapter / Charger . . . 17

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Contents

ii NBM-520 Narda

Charge state and power source indicator . . . . . . . . . . . . . . . . . 17

Operation from rechargeable batteries . . . . . . . . . . . . . . . . . . . 18

3.4 Connecting the probe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4 Measuring with the NBM-520 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.1 Switching on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.2 Displaying the instrument settings . . . . . . . . . . . . . . . . . . . . . . . 22

4.3 Self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.4 Setting the contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.5 Overview of the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.6 Selecting the result type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

ACT (Actual) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

MAX (Maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

AVG (Average) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

SPATIAL (spatial average) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.7 Selecting the units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.8 Freezing a result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.9 Changing the field type measurement . . . . . . . . . . . . . . . . . . . . 30

4.10 Using the alarm function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.11 Remote control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Instrument settings during remote control operation

with NBM-TS or with NBM-550 as the controller . . . . . . . . . . . . 32

4.12 Switching off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5 PC software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.1 Using the PC software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Minimum system requirements . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.2 Connecting the NBM-520. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.3 Working with the PC software . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.4 Changing the instrument settings . . . . . . . . . . . . . . . . . . . . . . . 37

5.5 Updating the firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Contents

Narda NBM-520 iii

6 Instrument maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.1 Cleaning the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.2 Replacing / removing the batteries . . . . . . . . . . . . . . . . . . . . . . . 40

6.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Rechargeable batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Instrument. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.4 Checking for proper operation . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Appropriate test sources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

7 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

7.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7.2 Measurement functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7.3 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7.4 General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

7.5 AC Adapter / Charger Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

7.6 CE Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

8 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

8.1 NBM-520. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

8.2 Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

8.3 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Contents

iv NBM-520 Narda

Narda NBM-520 1

1Useful information

This chapter contains basic information about measuring

electromagnetic fields and about using the NBM-520.

1.1 Measuring electromagnetic fields (page 2)

1.2 About this instrument (page 2)

1.3 About this operating manual (page 3)

1 Useful information

2 NBM-520 Narda

1.1 Measuring electromagnetic fields

In today’s world, practically everyone lives and works in an

environment surrounded by technical equipment that gener-

ates electromagnetic fields. Our recognition of the problems

associated with such fields and our depth of information in

this area has increased as the effects of such fields on the

human body have been examined more closely. Various

authorities have long defined limit values designed to pro-

tect users from the dangers of exposure to such emissions.

1.2 About this instrument

The Narda Broadband Field Meter NBM-520 provides virtu-

ally everyone concerned with this subject with an instrument

for measuring non-ionizing radiation with utmost accuracy

within the frequency range from 100 kHz to 60 GHz

(depending on the probe used). The instrument features

very simple operation, a handy design in a robust casing,

long battery life, and high measurement accuracy.

Probes for various measurement applications are con-

nected to the NBM-520 basic unit. Flat frequency response

probes are available, as well as so-called shaped probes

that evaluate the field according to a specific human safety

standard. These probes are calibrated separately from the

measuring instrument, and include a non-volatile memory

containing the probe parameters and calibration data. They

can therefore be used with any instrument in the NBM-500

family without any loss in calibration accuracy.

The PC software supplied with the instrument allows you to

remote control the NBM-520 and to configure the instru-

ment settings.

Applications

The NBM-520 makes precision measurements for human

safety purposes, particularly in workplace environments

where high electric or magnetic field strengths are likely. It

can also be used to demonstrate the electromagnetic com-

patibility (EMC) of devices and equipment.

1.3 About this operating manual

Narda NBM-520 3

Examples:

• Measuring field strengths as part of general safety

regulations

• Measuring the field strengths around transmitting and

radar equipment to establish safety zones and for

monitoring during operations

• Measuring the field strength emanating from mobile

phone repeaters and satellite communications systems to

ensure compliance with human safety limit values

• Measuring the field strength in the industrial workplace

environment, such as plastics welding equipment, RF

heating, tempering, and drying equipment

• Measurements to ensure the safety of persons using

diathermy equipment and other medical equipment that

generates high frequency radiation

• Field strength measurements in TEM cells and absorber

chambers

1.3 About this operating manual

Characters and symbols used

Various elements are used in this operating manual to indi-

cate special meanings or particularly important passages in

the text.

1 Useful information

4 NBM-520 Narda

Symbols and terms used in warnings

According to the American National Standard

ANSI Z535.6-2006, the following warnings, symbols, and

terms are used in this document:

Structure of warnings

All warnings are structured as follows:

The general danger symbol warns of risk of serious injury

when used with the signal words CAUTION, WARNING,

and DANGER. Follow all the instructions in order to avoid

injuries or death.

NOTICE Indicates a danger that results in damage to or destruction

of the instrument.

CAUTION Indicates a hazardous situation which, if not avoided,

could result in minor or moderate injury.

WARNING Indicates a hazardous situation which, if not avoided,

could result in death or serious injury.

DANGER Indicates a hazardous situation which, if not avoided, will

result in death or serious injury.

SIGNAL WORD

Type and source of danger

Consequences of failure to observe warning

⇒Instructions for preventing danger

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