Atec HF0191 User Manual

H-FIELD PROBE
HF0191

Measuring magnetic fields
from 27 MHz to 1 GHz

using instruments in the NBM-500 family

Occupational field exposure from radio

broadcasting, telecoms, industrial equipment

Isotropic (non-directional) measurement
Dynamic range 59 dB 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 27 MHz to 1 GHz. This wide
frequency range for a magnetic field probe covers all the major areas of
electromagnetic field exposure that can occur in radio and TV
broadcasting, telecommunications, and in high frequency industrial
applications.

PROPERTIES

The probe is designed with mechanical and electrical properties ideal for
field use. The probe head is made of foam material to provide effective
protection for the sensors, while having excellent RF characteristics.
The electric destruction limit is above 20 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 HF0191 Magnetic (H-)Field

Frequency range
Type of frequency response Flat

Measurement range

Dynamic range 59 dB
CW damage level 20 A/m 15 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

@ 2 mW/cm² (0.23 A/m)

Linearity

Referred to 2 mW/cm² (0.23 A/m)

Isotropic response
Temperature response +0.5/-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 318 mm x 66 mm Ø
Weight 90 g
Compatibility NBM-500 series meters
Country of origin Germany

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

(a)
(b) Cutoff frequency at approx. -3 dB
(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
(f) Uncertainty due to varying polarization (verified by type approval test for meter with probe). Ellipse ratio included and calibrated for each probe

(b)

(c)

200 A/m 1.5 kW/cm²

(d)

27 MHz to 1 GHz

0.018 to 16 A/m (CW)

0.018 to 1 A/m (True RMS)

±0.7 dB (50 to 80 MHz)
±0.5 dB (80 to 250 MHz)

12 µW/cm² to 10 W/cm² (CW)
12 µW/cm² to 38 mW/cm² (True RMS)

±0.8 dB ( 250 to 1000 MHz)

(e)

±0.5 dB (27 to 700 MHz)
±1.5 dB (> 700 MHz)

±3 dB (0.026 to 0.05 A/m)
±1 dB (0.05 to 0.1 A/m)
±0.5 dB (0.1 to 3 A/m)
±1 dB (3 to 16 A/m)

(f)

±1 dB

±3 dB (25 to 100 µW/cm²)
±1 dB (100 to 380 µW/cm²)
±0.5 dB (0.38 to 340 mW/cm²)
±1 dB (0.34 to 10 W/cm²)

10/ 15/ 20/ 27.12/ 30/ 35/ 40/ 50/ 60/ 70/ 80/ 90/ 100/ 120/ 150/ 180/ 200/ 250/ 300/ 400/ 433/
500/ 600/ 700/ 800/ 900/ 1000 MHz

-10 °C to +50 °C

-40 °C to +70 °C

ORDERING INFORMATION

Probe HF0191, H-field for NBM, 27 MHz – 1 GHz, isotropic 2402/06

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 0209-E0238B-0.0 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

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