Atec EF0391 User Manual

E-FIELD PROBE
EF0391

Measuring electric fields
from 100 kHz to 3 GHz

using instruments in the NBM-500 family

General public and occupational field

exposure from broadcasting, telecoms and
industrial equipment

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

measurement range

Maximum sensitivity starts at 0.2 V/m

The probe contains three orthogonally arranged dipoles 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 electric fields from 100 kHz to 3 GHz, covering the
fields that occur in broadcasting, telecoms, and industry. The high
sensitivity of 0.2 V/m and excellent linearity make it ideal for measuring
human safety limit values in the general public domain.

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 limits for pulsed and continuous wave signals
are several times higher 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 EF0391 Electric (E-)Field

Frequency range
Type of frequency response Flat

Measurement range

Dynamic range 64 dB
CW damage level 800 V/m 170 mW/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

@ 0.01 mW/cm² (6.14 V/m)

Linearity

Referred to 0.01 mW/cm² (6.14 V/m)

Isotropic response
Temperature response +0.2/ -1 dB (±0.025 dB/K)

GENERAL SPECIFICATIONS

Calibration frequencies

Recommended calibration interval 24 months
Temperature range

Operating
Non-operating (transport)

Humidity 5 to 95 % RH @ ≤25 °C ≤23 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

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

(d)
(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)

(e)

(f)

±1 dB

100 kHz to 3 GHz

0.2 to 320 V/m (CW)

0.2 to 10 V/m (True RMS)

10 nW/cm² to 27 mW/cm² (CW)
10 nW/cm² to 0.027 mW/cm² (True RMS)

8 kV/m 17 W/cm²

±1 dB (1 MHz to 1 GHz)
±1.25 dB (1 GHz to 2.45 GHz)

±1 dB (<400 MHz)
±1.5 dB (400 MHz to 1.8 GHz)
±1 dB (≥ 1.8 GHz)

±0.5 dB (1.2 to 200 V/m)
±0.7 dB (200 to 320 V/m)

±0.5 dB (0.00038 to 10.6 mW/cm²)
±0.7 dB (10.6 to 27 mW/cm²)

0.1/ 0.2/ 0.3/ 1/ 3/ 10/ 27.12 MHz

0.1/ 0.2/ 0.3/ 0.5/ 0.75/ 1/ 1.8/ 2.45/ 2.7/ 3 GHz

0 °C to +50 °C

-40 °C to +70 °C

ORDERING INFORMATION

Probe EF0391, E-field for NBM, 100 kHz – 3 GHz, isotropic 2402/01

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-E0233B-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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