Atec EHP-200 User Manual

Electric and Magnetic Field Measurement

EHP-200
Electric and Magnetic Field Analyzer

New solution for Isotropic Measurements ♦
in the 9 kHz – 30 MHz Range

♦

Electric Fields from 0.02 to 1000 V/m
Magnetic Fields from 0.6 mA/m to 300 A/m ♦
Built-in Frequency Spectrum Analysis ♦
Built-in Rechargeable Battery ♦
Optical Fiber Connection to PC ♦

The E-H fields analyzer model EHP-200 has been designed for accurate isotropic mea­surements of both electric and magnetic fields in the 9 kHz - 30 MHz frequency range,
with no or minimum perturbation of the fields that are being measured.

The field sensors and the electronic measuring circuitry are contained in a rugged
housing, only 3.6 x 3.6 x 4.3 inches in size. Separate 3-axis and total values (peak and
average) are measured with exceptional flatness and linearity of ±0.3 dB. Results are
expressed in V/m, A/m, μT, mW/cm2, W/m2.

The EHP-200 features built-in spectrum analysis with minimum selectable bandwidth
of 1 kHz for detailed measurements of the E and H field intensity vs. frequency, and
a dynamic range of 80 dB. The built-in rechargeable Li-Ion battery provides up to 8
hours of continuous operation.

The EHP-200 is controlled by a PC through the optical fiber link, and measurements
are displayed in real time. An auxiliary input is available for measuring the frequency
spectrum of external applied signals.

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Electric and Magnetic Field Measurement

Applications

BROADCASTING SURVEILLANCE

The EHP-200 is particularly useful in measuring the actual
fields generated by long, medium and short wave broadcast
transmitters, to ensure safety around the sites of large anten­nas, to control the transmitted power in the actual radiation
direction, to test the functionality of the transmitting anten­nas and to identify the borders between near and far field
regions.

WAVE IMPEDANCE

As a unique feature, the PC program calculates the field wave
impedance by dividing the total value of the E-field by that of
the H-field. This method is particularly suitable for evaluating
the non-linear, scattered near-field region of large broadcast
antenna systems.

FIELDS GENERATED BY METAL DETECTORS AND RFID’S

Fields generated by a number of devices using RF to detect
the presence of metals, to identify objects, anti-theft systems
etc. can now be accurately and easily measured.

EHP-200 Field Analyzer

EHP-200 Control Software

FOR WINDOWS™ OPERATING SYSTEMS

All measuring functions are user-programmable: Resolution
Bandwidth Filter, center frequency and frequency span, pre­amplifier, measuring units, etc.

The Marker function is used to measure the frequency and
amplitude. It features Highest, Next and Previous Peak func­tions, while the Marker Center function sets the display center
frequency at the current marker frequency value.

The Marker also features the Delta Peak function for relative
measurements. The Wide Band field value is calculated with
reference to the measured frequency span.

To immediately evaluate the measured levels, Limit Lines
can be created and displayed on the graphical window. The
measured data can be saved as either text or bitmap, and the
limits can also be saved and recalled.

Blue Line: total Field / Green Line: X-axis
Cyan Line: Y-axis / Magenta Line: Z-axis

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Electric and Magnetic Field Measurement

EHP-200 Field Analyzer

Specifi cationsEHP-200 E&H FIELD ANALYSER

EHP200 E AND H FIELD ANALYZER

RF SPECIFICATIONS Electric Field Magnetic Field Mode A Magnetic Field Mode B Auxilllary Input

Frequency Range 9 kHz to 30 MHz 9 kHz to 30 MHz 300 kHz to 30 MHz 9 kHz to 30 MHz

Measurement Range
@ 10 KHz RBW

@ Preamp ON

Dynamic Range >80 dB

Sensitivity
@ 10 kHz RBW

@ Preamp ON

Resolution 0.01 V/m 1 mA/m 0.1 mA/m 0.01 dB

Flatness

Anisotropy ±0.8 dB at 1 MHz

Linearity 0.5 dB @ 1 MHz from Full Scale to -60 dB Full Scale

Typical Accuracy at 1 MHz ±0.8 dB @ 20 V/m ±0.8 dB @ 53 mA/m ±0.8 dB @ 53 mA/m ±0.3 dB@-10 dBm

Maximum Frequency Span 6 kHz to 30 MHz

Resolution Bandwidths Available 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz, 300 kHz

Rejection to E-field — > 20 dB —

Rejection to H-field > 20 dB — — —

Calibration Errors Stored in internal EEPROM

Temperature Error 0.02 dB/

GENERAL SPECIFICATIONS

Preamplifier Selectable ON/OFF, 14 dB gain

Reading Units V/m, A/m, mT, mW/cm

Optical Link Maximum length of 80 m

Internal Battery 3.7 V, 3.6 Ah, Li-ion, rechargeable

Battery Operation Time > 8 hours (recharging time approximately 8 hours)

External Supply 10 – 15 VDC, 500 mA

Firmware Update Via Optical Fiber

Operating Temperature -10

Storage Temperature -20oC to +70oC

Dimensions and Weight 3.6 x 3.6 x 4.3 inches (92 x 92 x 109 mm), 1.22 lb (550 g)

ORDERING INFORMATION

Part Number EHP-200

Accessories Supplied

Optional Accessories EHP-200 Palm Kit

0.1 to 1000 V/m

0.02 to 200 V/m

0.1 V/m

0.02 V/m

±0.5 dB (20 V/m,

from 0.1 to 27 MHz)

10 meter Fiber Optic Cable ( FO-8053/10), Fiber Optic Converter (FO to RS-232, 8053-OC), Soft Carrying

Bag ( 8053-SC), Battery Charger ( 8053-BC), 50 cm Plastic Pole and Tripod, PC Software, Operating Manual,

0.03 to 300 A/m

6.0 mA/m to 60 A//m

30 mA/m

1 mA/m

±0.8 dB (166 A/m,

from 0.15 to 30 MHz)

Calibration Certificate

3.0 mA/m to 30 A/m

0.6 mA/m to 6 A/m

±0.8 dB (53 mA/m,

o

C

o

C to +50oC

3 mA/m

0.1 mA/m

0.3 to 27 MHz)

2

2

, W/m

-80 to 0 dBm

-94 to -14 dBm

-80 dBm

0.01 dB

±0.4 dB (-20 dBm)

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USA TEL: [phone] • FAX: [phone] • E-MAIL: [e-mail] • www.narda-sts.us