Atec HF3061 User Manual

H-FIELD PROBE
HF3061

Measuring magnetic fields
from 300 kHz to 30 MHz

using instruments in the NBM-500 family

Public and occupational field exposure from

broadcasting, telecoms, and industrial
equipment

Isotropic (non-directional) measurement
62 dB dynamic range without changing

measurement range

The probe contains three orthogonally arranged coils with detector
diodes. The three voltages, corresponding to the spatial components,
are available individually at the probe output. The NBM basic unit
calculates the resulting isotropic field strength.

APPLICATIONS

The probe detects magnetic fields from 300 kHz to 30 MHz, such as
those caused by short and medium wave transmitters, many RF
communications services, and industrial equipment. The dynamic range
from 0.012 A/m to 16 A/m (62 dB) makes it ideal for measuring field
exposure in both the public and the occupational environment.

PROPERTIES

The probe has mechanical and electrical properties that are ideal for
field use. The sensors are effectively protected by impact resistant
plastic. The electric destruction limit is above 35 A/m for continuous
wave signals, which is several times more than any of the human safety
limit values.

CALIBRATION

The probe is calibrated at several frequencies. The correction values are
stored in an EPROM in the probe and are automatically taken into
account by the NBM instrument. Calibrated accuracy is thus obtained
regardless of the combination of probe and instrument.

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SPECIFICATIONS

a

Probe HF3061 Magnetic (H-)Field

Frequency range
Type of frequency response Flat

Measurement range

Dynamic range 62 dB
CW damage level 35 A/m 46 W/cm²
Peak damage level
Sensor type Diode based system
Directivity Isotropic (Tri-axial)
Readout mode / spatial assessment 3 separate axes

UNCERTAINTY

Flatness of frequency response

Calibration uncertainty not included

Calibration uncertainty

@ 0.59 mW/cm² (0.125 A/m)

Linearity

Referred to 0.59 mW/cm² (0.125 A/m)

Isotropic response
Temperature response +0.2/ -0.8 dB (±0.025 dB/K @ 10 to 50 °C )

GENERAL SPECIFICATIONS

Calibration frequencies

Recommended calibration interval 24 months
Temperature range

Operating
Non-operating (transport)

Humidity 5 to 95 % RH @ ≤28 °C ≤26 g/m³ absolute humidity
Size 300 mm x 120 mm Ø
Weight 190 g
Compatibility NBM-500 series meters
Country of origin Germany

(a) Unless otherwise noted specifications apply at reference condition: device in far-field of source, ambient temperature 23±3 °C, relative air humidity 25% to 75%, sinusoidal signal

Cutoff frequency at approx. -3 dB

(b)
(c) Pulse length 1µsec, duty cycle 1:100
(d)

Frequency response can be compensated for by the use of correction factors stored in the probe memory

(e) Accuracy of the fields generated to calibrate the probes

Uncertainty due to varying polarization (verified by type approval test for meter with probe). Ellipse ratio included and calibrated for each probe

(f)

(b)

(c)

(d)

300 kHz to 30 MHz

0.012 to 16 A/m (CW)

0.012 to 0.7 A/m (True RMS)

5.4 µW/cm² to 10 W/cm² (CW)

5.4 µW/cm² to 18 mW/cm² (True RMS)

350 A/m 4.6 kW/cm²

0/-1 dB (500 to 800 kHz)
+0.1/ -0.5 dB (800 kHz to 30 MHz)

(e)

(f)

±0.6 dB

±3 dB (0.017 to 0.033 A/m)
±1 dB (0.033 to 0.068 A/m)
±0.5 dB (0.068 to 3 A/m)
±1 dB (3 to 16 A/m)

±1 dB

±3 dB (10 to 40 µW/cm²)
±1 dB (40 to 175 µW/cm²)
±0.5 dB (175 µW/cm² to 340 mW/cm²)
±1 dB (0.34 to 10 W/cm²)

0.1/ 0.15/ 0.2/ 0.3/ 0.4/ 0.5/ 0.6/ 0.7/ 0.8/ 0.9 MHz
1/ 1.2/ 1.5/ 2/ 3/ 4/ 5/ 10/ 15/ 20/ 25/ 27.12/ 30 MHz

0 °C to +50 °C

-40 °C to +70 °C

ORDERING INFORMATION

Probe HF3061, H-field for NBM, 300 kHz - 30 MHz, isotropic 2402/05

Part number

Narda Safety Test Solutions GmbH

Sandwiesenstrasse 7
72793 Pfullingen, Germany
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]
www.narda-sts.de

® Names and Logo are registered trademarks of Narda Safety Test Solutions GmbH and L3 Communications Holdings, Inc. - Trade names are trademarks of the owners.

NSTS 0510-E0237C 2 / 2 Subject to change

Narda Safety Test Solutions

435 Moreland Road
Hauppauge, NY 11788, USA
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]
www.narda-sts.com

Narda Safety Test Solutions Srl

Via Leonardo da Vinci, 21/23
20090 Segrate (Milano), Italy
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
www.narda-sts.it