Electrical Field Strength Meters

EFS-Series

EFS-10 and EFS-100

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

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