Electrical Field Strength Meters

EFS-Series

The Frankonia EFS field strength meters especially have been designed for field strength measurements / field homogeneity measurements during radiated immunity tests according to IEC/EN 61000-4-3 / -20. But it could also be used to measure the radiation exposure of the environment, for example at workplaces or flats.

The EFS is an isotropic miniature E-field sensor to ensure that the E-field will not be influenced by the size of the sensor itself. It even does not need any metering unit (which could also influence the field strength), because of its direct fibre optic output which allows direct connection of the sensor to the USB-interface of the control PC or laptop. The measuring values may be displayed via the individual IEC/EN 61000-4-3 / -20 control software or via a Windows software included in the delivery.

The EFS-10 / EFS-100 cover the frequency range from 10 kHz up to 9.25 GHz and are able to detect electrical field strength in the range from 0.14 V/m to 500 V/m (depending on type).

The sensors are battery operated by Li-Mn batteries, which allow a maximum operation time of 80 hours before recharging.

Features

Extreme small size

PC connection via fibre optic link

Excellent isotropy (0.3 dB typical)

Frequency range: 10 kHz to 26,5 GHz

Field strength measurements from 0.14 V/m to 500 V/m

Up to 80 hours operating time before recharging

Technical specifications	EFS-10	EFS-100
Frequency range	10 kHz-9.25Ghz	100 kHz – 9.25 GHz
Flatness	0.1Mhz-150MHz: 0.4 dB	1 – 150 MHz: 0.8 dB
With frequency correction OFF	0.05GHz-6GHz: 1.6 dB 0.03GHz-7.5GHz: 3.2 dB	0.5 – 6 GHz: 1.6 dB 0.3 – 7.5 GHz: 3.2 dB
With frequency correction ON	0.05GHz-7.5GHz: 0.4 dB	0.3 – 7.5 GHz: 0.4 dB
Dynamic range (single range)	0.5-500 V/m (60 dB)	0.14 – 140 V/m (60 dB)
Linearity	0.4 dB @ 50 MHz / 1-500 V/m	0.4 dB @ 50 MHz / 0.3 – 100 V/m
Resolution	0.01 V/m
Sensors	6 monopoles
Isotropicity	0.5 dB (0.3 dB typical) (@50 MHz)
Overload	1000 V/m	300 V/m
Measured data X-Y-Z axis	sampling simultaneous on X-Y-Z axis
Sampling rate	22 S/s to 0.03 S/s, depending on filter setting
Digital filter	2.3 to 28 Hz, low-pass-pre-settable
Internal battery	3V-5mAh, rechargeable Li-Mn
Operation time	80 hours @0.4 S/sec., 28 Hz filter 60 hours @ 5 S/sec., 28 Hz filter
Recharging time	48 for full operation time
Internal data memory	serial number, calibration date, calibration factors, firmware version
Communication	bidirectional fiber optic link
Fibre optic connector	HFBR-0500
Fibre optic length	10 m standard (20/40 m) optional
Fibre optic to PC connection	fibre optic to RS232 converter, RS232 to USB converter
PC Software	included (display of field, temperature and battery voltage measurements, setting of filters, sampling rate, frequency)
Operating temperature	-10 °C ÷ +50 °C
Temperature reading	0.1 °C resolution
Battery voltage reading	10 mV resolution
Dimensions	53 mm overall, (body: 17 mm diameter, sensor: 17 mm)
Weight	25 g, including 1 m fibre optic pigtail
Probe mount	20 UNC female
Included accessories	10 m fibre optic cable, optical/RS232 adapter + RS232/USB adapter, software, battery charger
Optional accessories	20 m fibre optic cable, order-no.: EFS-OF20 40 m fibre optic cable, order-no.: EFS-OF40

Technical specifications	EFS-300	EFS-500
Frequency range	300kHz-18GHz	300kHz-26.5GHz
Flatness	0.3MHz-18000MHz: 0.4dB	0.10MHz-18000MHz: 1.8dB
With frequency correction OFF	3MHz-8200MHz: 1.4dB 1MHz-12000MHz: 2.4dB	3MHz-23000MHz: 3.2dB
With frequency correction ON	0.6MHz-18000MHz: 3.8dB	0.3MHz-26500MHz: 0.4dB
Dynamic range (single range)	0.17-170 V/m (60dB)	0.4-800 V/m (66dB)
Linearity	0.4dB @ 50MHz / 0.3-170V/m	0.4dB @ 50 MHz / 0.8-800V/m
Resolution	0.01 V/m
Sensors	6 monopoles
Isotropicity	0.4dB (0.2dB typical @ 50MHz)
Overload	350 V/m	1600 V/m
Measured data X-Y-Z axis	sampling simultaneous on X-Y-Z axis
Sampling rate	22 S/s to 0.03 S/s, depending on filter setting
Digital filter	2.3 to 28Hz, low-pass, pre-settable
Internal battery	3V-5mAh, rechargeable Li-Mn
Operation time	80 hours @ 0.4 S/sec., 28 Hz filter 60 hours @ 5 S/sec., 28 Hz filter
Recharging time	48 hours for full operation time
Internal data memory	serial number, calibration data, calibration factors, firmware version
Communication	bidirectional fiber optic link
Fibre optic connector	HFBR-0500
Fibre optic length	10m standard (20/40m optional )
Fibre optic to PC connection	fiber optic to RS232 converter, RS232 to USB converter
PC Software	included (display of field, temperature and battery voltage measurements, setting of filters, sampling rate, frequency)
Operating temperature	-10 °C ÷ +50 °C
Temperature reading	0.1°C resolution
Battery voltage reading	10mV resolution
Dimensions	53mm overall, (body:17mm diameter, sensor: 17mm)
Weight	25g, including 1m fiber optical pigtail
Probe mount	20 UNC female
Included accessories	10m fiber optical cable, optical RS232 adapter + RS232/USB adapter, software, battery charger
Optional accessories	20m fiber optic cable, order-no.: EFS-OF20 40m fiber optic cable, order-no.: EFS-OF40

EFS-Laser

The Frankonia EFS-LASER Electric Field Probe especially has been designed for field strength measurements / field homogeneity measurements during radiated immunity tests according to IEC/EN 61000-4-3. However, it is also excellent to measure the radiation pollution of the environment, for example at workplaces or flats.

The EFS-LASER is an isotropic miniature E-field sensor to ensure, that the E-field will not be influenced by the size of the sensor itself. It even does not need any metering unit (which could also influence the field-strength), because of its direct fibre-optic output, which does allow direct connection of the sensor to the USB-interface of the control PC or laptop. The measuring values may be displayed via the individual IEC 61000-4-3 control software or via a windows-software included in the delivery.

The EFS-Laser cover the frequency-range from 10 KHz – 6 GHz. The utilized linearization technology provides a dynamic range up to 100 dB. The EFS-Laser is a smart, fast, extremely accurate electric field probe, which provides linearization, temperature compensation, control and communication functions. Noise reduction and temperature compensation allow accurate measurments down to 0.1 V/m. The probe is laser-powered to allow continuous, galvanically isolated operation without recharging or battery replacement The power supply unit comes in a small handy box.

Features

Laser powered – no more empty batteries

Extreme small size

High resolution, high speed, low noise

Frequency range: 10 kHz to 6 GHz

Field strength measurements from 0.1 V/m up to 10 kV/m

Wide dynamic range

Continuous real-time data streaming

Temperature compensation

Computer-Interface
PC Interface	USB 2.0
Application Software	included
Burst Trigger Output Level	3.3 V CMOS
Burst Trigger Output Connector	BNC
Laser – Wavelength	850 nm
Laser – Output Power	750 mW
Laser – Shutdown Time	1 ms
Fiber Optic Connector	FC / ST
Fiber Optic Cable Length	15 m
Max. Fiber Optic Cable Length	100 m (sold on request)
Input Voltage (power supply included)	5V ± 5%
Input Current	< 2A
Ambient Temperature	10 °C … 40 °C
Dimensions (W x D x H)	483 x 43.5 (1HE) x 120mm

Field Sensor
Frequency range	10 kHz … 6GHz
Analog Rise Time 10 kHz … 100 MHz low Bandwidth 10 kHz … 100 MHz high Bandwidth 100 MHz … 6 GHz	4 μs 40 ns 25 ns
Minimum Pulse Width Burst Mode Streaming Mode	500 ns 2 μs
Resolution	< 0.01 dB
Sampling Rate Burst Mode Streaming Mode	2 MSample/s > 500 kSample/s
Field Strength 10 kHz … 100 MHz 100 MHz … 6 GHz	< 1 V/m … > 10 kV/m < 0.1 V/m … > 700 V/m
Damage Level 10 kHz … 100 MHz 100 MHz … 6 GHz	40 kV/m 10 kV/m
Dynamic Range 10 kHz … 100 MHz 100 MHz … 6 GHz Isotropy, 900 MHZ	80 dB … 100 dB 70 dB … 80 dB < 1dB
Amplitude Accuracy 10 kHz … 10 MHz (1.5 V/m to 30 V/m) > 10 MHz … 1 GHz (1 V/m to 80 V/m) > 1 GHz … 8 GHz (3 V/m to 100 V/m)	1.3 dB 1.5 dB 1.0 dB
Linearity Error	< 0.1 dB
Temperature Stability	0.1 dB
Ambient Temperature	10 °C … 40°C
Dimensions (W x D x H)	67 x 67 x 124 mm

EFS-Series

EFS-Laser

Anechoic Chambers

EMC Test Systems

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