NBM-550
Distributed by:
Air-Met Scientic Pty Ltd
Work with Confidence
Air-Met Sales/Service
P: 1800 000 744
F: 1800 000 774
E: sales@airmet.com.au
Air-Met Rental
P: 1300 137 067
E: hire@airmet.com.au
W: www.airmet.com.au
Narda Broadband Field Meter
Operating manual
This product is protected by the following patents:
China Design Patent ZL 2006 3 0303322.X
China Design Patent ZL 2006 3 0190679.1
European Design Patent 000594254-001
European Design Patent 000597836-0001
German Patent DE19536948A1
U.S. Design Patent No. US D570,235 S
U.S. Patent No. 5,877,619
Narda Safety Test Solutions GmbH
Sandwiesenstraße 7
72793 Pfullingen, Germany
® Names and Logo are registered trademarks of Narda Safety Test Solutions GmbH
and L3 Communications Holdings, Inc. –
Trade names are trademarks of the owners.
© 2015
Order no.: 2401/98.21
Version: 06/15.03, A ...
Previous version: 05/11.03, A ...
Subject to change.
Our normal guarantee and delivery terms
apply.
Printed in Germany
Contents
1 Useful information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Measuring electromagnetic fields . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 About the NBM-550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 About the EHP-50 Analyzer (option). . . . . . . . . . . . . . . . . . . . . . . 3
1.4 About this operating manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Structure of this operating manual . . . . . . . . . . . . . . . . . . . . . . . . 4
User interface language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Characters and symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
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-550 for use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Items included. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Unpacking the probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Transport damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Equipping the case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
After transport and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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3.2 Instrument overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
NBM-550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3 Power supply NBM-550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Operation from rechargeable batteries . . . . . . . . . . . . . . . . . . . 20
Charge state and power source indicator . . . . . . . . . . . . . . . . . 22
3.4 Power supply EHP-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Displaying the charge state and power source . . . . . . . . . . . . . 24
3.5 Connecting the probe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Probe with “Push-Pull” connector . . . . . . . . . . . . . . . . . . . . . . . 25
Probe with threaded coupling connector . . . . . . . . . . . . . . . . . . 25
3.6 Connecting and setting up the EHP-50 . . . . . . . . . . . . . . . . . . . 26
3.7 Fitting the GPS module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.8 Using the table top tripod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1 Switching on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
EHP-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
GPS reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.2 The NBM-550 operating concept . . . . . . . . . . . . . . . . . . . . . . . . 32
Measurement screen overview . . . . . . . . . . . . . . . . . . . . . . . . . 32
The menu levels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Navigating in the menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.3 Making basic settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Selecting the language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Setting the auto zero adjustment . . . . . . . . . . . . . . . . . . . . . . . . 35
Setting the auto off function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Setting the backlight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Setting the contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Changing the display units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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Changing the units format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Setting the date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Changing the GPS display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Selecting the field type and units for combination probes. . . . . . 40
Locking the keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5 Measuring with the NBM-550 and HF probes . . . . . . . . . . . . . . . . . . 43
5.1 Avoiding measurement errors . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Electrostatic charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Changes in temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Strong low frequency fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.2 Measuring in Normal display mode . . . . . . . . . . . . . . . . . . . . . . 46
Selecting the result type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Freezing a measured value . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Storing a measured value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Add voice comments (optional). . . . . . . . . . . . . . . . . . . . . . . . . . 48
Setting the averaging time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.3 Measuring the spatial average . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Measuring discrete values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Measuring values continuously. . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.4 Measuring in History display mode. . . . . . . . . . . . . . . . . . . . . . . 52
Display overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Evaluating the curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Storing the graphical record . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.5 Measuring in XYZ display mode . . . . . . . . . . . . . . . . . . . . . . . . . 54
Display overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
5.6 Measuring in Monitor display mode . . . . . . . . . . . . . . . . . . . . . . 56
Display overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.7 Activating the alarm function. . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
5.8 Audible Indicator (hot spot search) . . . . . . . . . . . . . . . . . . . . . . . 58
5.9 Measuring with a test standard. . . . . . . . . . . . . . . . . . . . . . . . . . 58
Possible displays when using a test standard. . . . . . . . . . . . . . . 60
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5.10 Measuring with a correction frequency . . . . . . . . . . . . . . . . . . . 62
6 Measurements with the NBM-550 and EHP-50 . . . . . . . . . . . . . . . . 63
6.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
EHP-50 versions supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Selecting EHP-50 mode manually . . . . . . . . . . . . . . . . . . . . . . . 64
6.2 Display types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
6.3 General settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Display wideband or peak value . . . . . . . . . . . . . . . . . . . . . . . . 66
Changing the field type and measurement range . . . . . . . . . . . 66
Changing the result type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Changing the frequency range (Span). . . . . . . . . . . . . . . . . . . . 68
Freezing a measured value . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Storing a measured value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.4 WPM display mode (Weighted Peak method) . . . . . . . . . . . . . . 69
6.5 Spectrum display mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
6.6 Standard display mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
6.7 XYZ display mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
6.8 Monitor display mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
6.9 Other settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Unavailable functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
The alarm function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Storing measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Managing result data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Saving and loading device settings . . . . . . . . . . . . . . . . . . . . . . 77
7 Recording and managing measured values . . . . . . . . . . . . . . . . . . 79
7.1 Storage types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
7.2 Recording measurements by timer control . . . . . . . . . . . . . . . . 80
Setting the recording parameters. . . . . . . . . . . . . . . . . . . . . . . . 81
Starting the recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
7.3 Recording conditional measurements (optional) . . . . . . . . . . . . 82
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Setting the recording parameters . . . . . . . . . . . . . . . . . . . . . . . . 83
Starting / stopping the recording. . . . . . . . . . . . . . . . . . . . . . . . . 84
7.4 Managing result data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Using the Memory Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Using the Data Viewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Data Viewer display examples . . . . . . . . . . . . . . . . . . . . . . . . . . 86
8 Setup and configure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
8.1 Configuring the interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
8.2 Saving and loading instrument settings . . . . . . . . . . . . . . . . . . . 90
Menu overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Changing a setup name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Setting the power on behavior . . . . . . . . . . . . . . . . . . . . . . . . . . 92
8.3 Displaying instrument and probe information . . . . . . . . . . . . . . . 92
8.4 Using the NBM-550 as a controller. . . . . . . . . . . . . . . . . . . . . . . 93
8.5 Activating instrument options . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
9 PC software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
9.1 Using the PC software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Minimum system requirements. . . . . . . . . . . . . . . . . . . . . . . . . . 96
9.2 Connecting the NBM-550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
9.3 Working with the PC software. . . . . . . . . . . . . . . . . . . . . . . . . . . 97
9.4 Updating the firmware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
9.5 Performing a reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
10 Overview of all menus and functions . . . . . . . . . . . . . . . . . . . . . . . 101
10.1 Measurement menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
10.2 Main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
10.3 Measurement Settings (HF mode) . . . . . . . . . . . . . . . . . . . . . . 104
Page 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Page 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
10.4 Measurement Settings (LF mode) . . . . . . . . . . . . . . . . . . . . . . 106
Page 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
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Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
10.5 Data Logger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
10.6 Memory Manager. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
10.7 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
10.8 Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
10.9 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
10.10 Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
11 Instrument maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
11.1 Cleaning the instrument. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
11.2 Replacing / removing the batteries . . . . . . . . . . . . . . . . . . . . . 117
11.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Rechargeable batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
11.4 Checking instrument functions. . . . . . . . . . . . . . . . . . . . . . . . . 120
Appropriate test sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
12 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
12.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
12.2 Measurement functions (with HF probes) . . . . . . . . . . . . . . . . 124
12.3 Result memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
12.4 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
12.5 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
12.6 General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
12.7 Standards compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
12.8 AC Adapter / Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
12.9 EHP-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
12.10 CE Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . 129
12.11 Declarations of origin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
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13 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
13.1 NBM-550. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
13.2 Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
High frequency probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Low frequency probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
13.3 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
14 Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
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VIII NBM-550 Narda
1 Useful information
This chapter contains basic information about measuring
electromagnetic fields, about using the NBM-550, and about
the structure of this operating manual.
1.1 Measuring electromagnetic fields (page 2)
1.2 About the NBM-550 (page 2)
1.3 About the EHP-50 Analyzer (option) (page 3)
1.4 About this operating manual (page 4)
Narda NBM-550 1
1 Useful information
1.1 Measuring electromagnetic fields
In today’s world, practically everyone lives and works in an
environment surrounded by technical equipment that
generates 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 protect users from the dangers of exposure to
such emissions.
1.2 About the NBM-550
The Narda Broadband Field Meter NBM-550 provides
virtually 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 has
a wide range of functions, yet it is very easy to use. It also
features a handy design, robust casing, long battery life, and
high measurement accuracy.
Probes for various measurement applications are
connected to the NBM-550 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-550 as well as to export saved
measurement data and to analyze the results.
2 NBM-550 Narda
1.3 About the EHP-50 Analyzer (option)
Applications
The NBM-550 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
compatibility (EMC) of devices and equipment.
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 the EHP-50 Analyzer (option)
The optionally available EHP-50 Analyzer can be used to
measure either electric or magnetic fields in the frequency
range between 1 Hz and 400 kHz. As well as wideband
measurement, it is also possible to perform spectrum
analysis on the LF fields because of the FFT function built
into the EHP-50. It is also possible to display the numerical
value of the highest peak in the spectrum (“Highest Peak”).
The IEC 6176-2 Weighted Peak method (time domain) is
provided to allow standard-compliant measurement of
complex signal shapes. The EHP-50 Analyzer can be
operated as a stand-alone system since it has its own power
supply and built-in signal processing. It forms a complete
measuring system for recording, processing, storing and
displaying LF field measurements when used in conjunction
Narda NBM-550 3
1 Useful information
with the NBM-550 as a convenient control and display unit.
Even so, the EHP-50 still performs the measurement by
itself and transfers the results to the NBM-550 in digital form
via an optical cable.
Note: The NBM-550 only supports the functions of the EHP-50 for
versions EHP-50D and EHP-50F. The EHP-50D has a
frequency range restricted to 5 Hz – 100 kHz and does not
yet support the Weighted Peak method.
1.4 About this operating manual
Structure of this operating manual
This operating manual is divided into two main parts:
1. Operating the NBM-550 and measuring with HF probes:
You will find all the information you need to make the
most important settings on the NBM-550 and easily
carry out most of the measurement tasks using HF
probes in chapters 3 to 5 and 7 to 9.
2. Measuring with the EHP-50 Analyzer:
You will find all the information you need to operate the
EHP-50 LF Analyzer in conjunction with the NBM-550 in
chapter 6. Cross references are provided to information
already described in other chapters.
3. Overview of menus and their functions:
You will find an overview of all menu functions, together
with a brief description of each function in chapter 10.
You can use this overview to find a function quickly.
User interface language
English language terms are used in this operating manual to
describe the user interface.
You can display the user interface of the NBM-550 in other
languages (see “Selecting the language” on page 35).
Please note that if you change the language, the
displayed terms will differ from those described in this
manual.
4 NBM-550 Narda
1.4 About this operating manual
Characters and symbols used
Various elements are used in this operating manual to
indicate special meanings or particularly important
passages in the text.
Symbols and terms used in warnings
According to the American National Standard ANSI Z535.62006, the following warnings, symbols, and terms are used
in this document:
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
CAUTION
WARNING
DANGER
Indicates a danger that results in damage to or destruction
of the instrument.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided, will
result in death or serious injury.
Structure of warnings
All warnings are structured as follows:
SIGNAL WORD
Type and source of danger
Consequences of failure to observe warning
Instructions for preventing danger
Narda NBM-550 5
1 Useful information
! Important instruction
✓ Requirement
Instruction
1.
2.
3.
Result
Bold type Control element
CAPITALS Menu name
Symbols and marks used in this document
Indicates an instruction that must be followed to avoid
danger.
Indicates a requirement that must be met before the next
instruction can be carried out, e.g.
✓ The instrument is switched off.
Indicates a single instruction, e.g.
Switch the instrument on.
Sequence of instructions
Indicates a sequence of instructions that must be carried
out in the order given.
Indicates the result of carrying out an instruction, e.g.
The instrument starts a self test.
Indicates a control element on the instrument, e.g.
Press the ENTER key.
Indicates a menu name, e.g.
Open the MAIN menu.
Terminology
Item Meaning
Battery Rechargeable battery
Dry battery Non-rechargeable battery
6 NBM-550 Narda
2 Safety instructions
This chapter contains important instructions on how to use
the NBM-550 safely. Please therefore read this chapter
carefully and follow the instructions closely.
2.1 Using this operating manual (page 8)
2.2 Proper use (page 8)
2.3 Improper use (page 8)
2.4 Dangers from electromagnetic fields (page 9)
2.5 Dangers when handling rechargeable batteries
(page 10)
2.6 Dangers from AC Adapter / Charger (page 10)
Narda NBM-550 7
2 Safety instructions
2.1 Using this operating manual
Carefully read this entire operating manual before you
start using the instrument.
Keep this operating manual so that it is available to
everyone who uses the instrument, and ensure that this
operating manual is with the instrument if you pass it on
to a third party.
2.2 Proper use
The NBM-550 is designed to measure and evaluate
electromagnetic fields.
Only use the instrument for the purpose and under the
conditions for which it has been designed.
In particular, observe the technical data given in the
“Specifications” on page 123.
Proper use also includes:
observing any national accident prevention regulations
at the place of use.
ensuring that the instrument is used only by
appropriately qualified and trained persons.
2.3 Improper use
The NBM-550 is not a warning device that gives active
notice of the existence of dangerous fields by means of a
visible or audible warning signal.
Remember that this instrument is a measuring device,
not a warning device.
Carefully observe the actual measurement displayed
when you are approaching an unknown field source.
If in doubt, use an additional warning device such as
“RadMan” or “Nardalert”, available from Narda Safety
Test Solutions.
8 NBM-550 Narda
2.4 Dangers from electromagnetic fields
2.4 Dangers from electromagnetic fields
Strong Fields
Very high field strengths can occur in the vicinity of
some radiation sources.
Do not cross or ignore safety barriers or markings.
Persons with electronic implants (e.g. heart
pacemakers) must avoid danger zones.
Measurement Errors
Metallic labels (stickers) affixed to the yellow sensor
area of the probe can lead to measurement errors,
usually an underestimation of the electromagnetic field
strength.
Affix labels of any type only to the black probe shaft.
If the instrument malfunctions, take it out of service and
contact your Narda Service Center. The addresses are
listed at the end of this operating manual and on the
Internet at http://www.narda-sts.com.
Probe is not operating properly
Possibly present high radiation values are not
recognized.
Check probes for proper operation with a signal source
before using this measuring instrument. This is
especially important for thermocouples because the
sensors can be affected by various mechanical and
environmental stressors.
Narda offers portable sources to accomplish this important step (see “Accessories” on page 135).
Before beginning any RF radiation measurement, always
inform yourself of the frequencies and field strengths that
you could expect to encounter.
Narda NBM-550 9
2 Safety instructions
2.5 Dangers when handling rechargeable batteries
When handled improperly, rechargeable batteries can
overheat, explode, or ignite.
Only use the NBM-550 with NiMH rechargeable
batteries (AA, Mignon).
Do not use dry batteries.
Do not replace individual batteries; always replace the
entire set.
Always use identical batteries.
Never touch both poles of the batteries simultaneously
with a metal object.
Make sure you insert the batteries correctly as shown on
the base of the battery compartment.
Always close the battery compartment immediately after
replacing batteries.
Never use the NBM-550 with the battery compartment
open.
2.6 Dangers from AC Adapter / Charger
You could experience electric shock from the AC
adapter/charger.
Do not use the instrument when the casing is damaged
because parts carrying dangerous voltages could be
exposed.
Do not use an AC adapter/charger that has been moved
from a cold to a warm room, thereby forming
condensation.
Only use the AC adapter/charger indoors and at
temperatures between 0 °C and +40 °C.
The AC adapter/charger could be destroyed if the
voltage specification on the AC adapter/charger does
not match the AC line voltage.
Only use the AC adapter/charger if the voltage
specification on the AC adapter/charger matches the AC
line voltage.
10 NBM-550 Narda
3 Preparing
the NBM-550 for use
This chapter describes all you need to do before starting to
use the NBM-550.
3.1 Unpacking (page 12)
3.2 Instrument overview (page 16)
3.3 Power supply NBM-550 (page 20)
3.4 Power supply EHP-50 (page 23)
3.5 Connecting the probe (page 24)
3.6 Connecting and setting up the EHP-50 (page 26)
3.7 Fitting the GPS module (page 27)
3.8 Using the table top tripod (page 27)
Narda NBM-550 11
3 Preparing the NBM-550 for use
3.1 Unpacking
Packaging
The packaging is designed to be re-used as long as it has
not been damaged.
Keep the original packaging and use it whenever the
instrument needs to be shipped or transported.
Items included
Check that all the following items have been delivered.
NBM-550
•NBM-550
• 4 x NiMH Mignon/AA batteries (packaged separately)
•Case
• Probe (type and quantity as ordered)
• AC Adapter / Charger
• Shoulder strap
• USB cable
• Table top tripod
• CD-ROM with NBM-TS PC software
• Operating manual
• Calibration certificate
EHP-50 Set for NBM-550
• EHP-50 Analyzer
• 12 V AC/DC charger
• Optical connector (bridged, for stand-alone operation)
• Extension rod, 0.5 m
• Optical cable, 10 m
• O/E converter USB, RP-02
• CD-ROM with EHP-TS PC software and
operating manual (PDF file)
• 2 foam inlays for the case
12 NBM-550 Narda
3.1 Unpacking
Unpacking the probes
1. Carefully open the foil bag to prevent damage to the
probes. Use a pair of scissors to cut open the outer edge
of the bag at the plug end of the probe.
2. Hold the probe by the plug body to remove it from the
bag.
3. Place the probe in the appropriate recess in the case to
store it safely.
The plastic bag is no longer needed and can be disposed of.
Note: Factory-fresh NBM probes are usually supplied sealed in a
plastic foil under vacuum. This prevents any degradation
due to moisture and means that the recommended
calibration interval can be increased by as much as 6
months. This is intended to ensure that the recommended
period of use of 24 months can still be achieved even if
delays occur in transit or due to customs procedures.
Transport damage
NOTICE
Instrument/accessories damaged during
transportation
Using damaged instrument/accessories can lead to
subsequent damage.
Check the instrument and all accessories for damage
when you have unpacked them.
If the instrument is damaged, contact your Narda
Service Center.
The addresses of your Narda Service Center are listed at
the end of this operating manual and on the Internet at
http://www.narda-sts.com.
Narda NBM-550 13
3 Preparing the NBM-550 for use
2
2
2
1
6
5
4
3
7
8
1
3
4
5
6
6
7
9
8
2
Equipping the case
You can use the case provided to store a wide range of
optional accessories in addition to the items supplied. The
figures below show the compartments in the case lid and
case base.
Case lid
1 Test generator
2Probe
3 O/E converter USB
4 GPS fitting set
5 RadMan Personal Monitor
6 Compartment for cables
and operating manual
7 O/E converter RS232
8 Extension rod
Case base
1 NBM-550 basic unit
2 GPS (assembled)
3 Rechargeable batteries
4 AC adapter
5 Table top tripod
6 Probe or EHP-50 with
foam inlays
7 NBM-520 basic unit
8 Shoulder strap
9 Earphone
14 NBM-550 Narda
3.1 Unpacking
After transport and storage
NOTICE
Condensation on an instrument can lead to
damage
Condensation can form on an instrument that has
been stored at a low temperature when it is brought
into a warm room. It may be damaged if used.
Wait until all visible condensation has evaporated from
the instrument surface to avoid damaging the instrument.
Note: The instrument is not ready for use until it has reached a
temperature within the operating range of -10 to +50 °C.
Narda NBM-550 15
3 Preparing the NBM-550 for use
1
3
4
5
2
6
8
7
6a
6b
6c
6d
3.2 Instrument overview
NBM-550
Figure 1 Device overview NBM-550
16 NBM-550 Narda
1 Probe connector socket
ESC
OK
2 Microphone
3Display
4 Operating panel
Function keys
Used to select the menu functions shown on the display
ESC key
Used to exit from a menu / reset functions and measured values
OK key
Used to open a menu or function / confirm a setting
UP/DOWN arrow keys
Used to select menus and functions / change values / lock the keypad / change the
contrast
ON/OFF key
Used to switch the instrument on or off
Charge Charge state
Indicates the charge state (red = rapid charging, green = trickle charging)
Status Operating status
Indicates the instrument operating status: Green = normal operation, red = remote
operation, flashing red = firmware update or exceeded alarm threshold
5 Tripod bush
6 Electrical and optical connectors
6a Multi-function socket for USB / GPS (optional) / external trigger
6b Earphone
6c Optical connector
6d AC Adapter / Charger
7 Tripod bush (on back of instrument)
8 Battery compartment (on back of instrument)
3.2 Instrument overview
Narda NBM-550 17
3 Preparing the NBM-550 for use
9
10a
12
13
11
13a 13c 13e
13d
13b
10b
Probes
Figure 2 Overview of probes
18 NBM-550 Narda
3.2 Instrument overview
Probe (various models available)
9 Probe head
10 Probe plug
10a Probe with threaded coupling connector
10b Probe with “Push-Pull” connector
EHP-50
11 Probe head
12 Tripod bush
13 Electrical and optical connections
13a Optical connector
13b AUX signal input for electrical signals – can only be used with EHP-TS.
13c ON / OFF button
13d Status LED
13e Charger unit
Please follow the instructions in the EHP-50 operating manual.
Meanings of colors and flashing rates:
• No charger unit connected:
– Red, rapid flashing: cannot set up communications
– Green, rapid flashing: setting up communications
– Green, slow flashing: data transfer in progress (flashing rate depends on
measurement speed)
• Charger unit connected (no data transfer possible):
– Orange, rapid flashing: battery charging
– Green, rapid flashing: battery fully charged
Narda NBM-550 19
3 Preparing the NBM-550 for use
3.3 Power supply NBM-550
The power supply is normally taken from the batteries
provided. You can use the AC Adapter / Charger supplied as
an alternative power source.
Note: We do not recommend that you operate the instrument with
the AC Adapter / Charger connected, as this can
significantly degrade the measurement performance of the
NBM-550. The measurement accuracy figures given in the
specifications cannot then be guaranteed.
Operation from rechargeable batteries
The rechargeable NiMH batteries for this device are
packaged separately. You must insert the batteries into the
device and then charge them up fully before using the
device. The charging cycle takes about 2 hours. Do not use
dry batteries in this device.
Improper pole positions
The batteries can explode and damage the instrument
if you put the batteries in the wrong way round.
Observe the positions of the positive and negative
poles marked in the battery compartment.
NOTICE
Inserting the batteries
1. Open the battery compartment cover underneath the
device by undoing the two screws with a screwdriver or
the edge of a coin.
2. Take the NiMH batteries provided out of their protective
foil and insert them into the battery compartment. Make
sure you put them in the right way round. The positions
of the positive and negative poles are marked in the
battery compartment by "+" and " –" respectively. Match
the markings to the markings on the batteries.
3. Close the battery compartment cover and do up the two
screws again to secure it.
20 NBM-550 Narda
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