Atec EMR-20C, EMR-21C User Manual

RF Safety

Test Solutions

50 Years of

Excellence

Electric and Magnetic Field Measurement

EMR-20C and EMR-21C

E-Field Measurement Systems

100 kHz to 3 GHz

◆

0.6 to 800 V/m (-20C)

◆

0.2 to 320 V/m (-21C)

◆

Completely Automatic Zeroing

◆

Easy-to-Use Design

◆

Lightweight and Rugged

◆

Cost Effective

◆

Isotropic Detection

◆

24 Month Calibration Interval

◆

Description

The EMR-20C and –21C are complete systems that con­sist of a meter and probe, along with a charging system for
the NiCad batteries.

The EMR-20C and EMR-21C are supplied with a cali­brated Type 8 probe that provides coverage for many in­dustrial systems operating at 915 and 2450 MHz, as well
as measuring extremely low field levels. Users appreciate
the wide measurement range and extreme ruggedness of
this multi-purpose survey system. The EMR-20C and -21C
have even been designed to withstand drops from two
meters directly on the sensor head!

Operation of this series of survey systems could not be
any easier. All you need to do is connect the probe and
turn on the meter. The system automatically detects the
probe and auto-zero’s the system – even while immersed
in an RF field environment. Electric field readings are dis­played in units of V/m, W/m
of measurement range, without touching a button!

Both the EMR-20C and -21C feature a bi-directional
fiber-optic link. With the optional software and cables,
real-time readings can be displayed on a personal
computer.

2

and mW/cm2, with over 62 dB

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Safety Test Solutions

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RF Safety

Test Solutions

Electric and Magnetic Field Measurement

Specifications

EMR-20C EMR-21C

Frequency Range 100 kHz to 3 GHz

Field Measured E-Field Only, Isotropic Detection, Diode Sensor

0.6 to 800 V/m

Measurement Range

(CW signals > 300 kHz)

0.6 to 20 V/m (True RMS)

Measurement Resolution 0.01 V/m

Overload Levels

700 mW/cm

70 W/cm

2

2

(Peak)

(CW)

Absolute Error ±1 dB (27.5 V/m and 27.12 MHz)

0.6 to 1.25 V/m = ±3dB

Linearity Error

a

1.25 to 2.5 V/m = ±1 dB

2.5 to 400 V/m = ±0.5 dB

400 to 800 V/m = ±0.7 dB

Frequency
Response Error

b

Isotropic Deviation
(Typical)

100 kHz to 100 MHz = ±0.45 dB

100 MHz to 3 GHz = ±1.4 dB

Field probe only = ±0.5 dB for Freq.>1MHz

Complete system = ±1.0 dB for Freq.>1MHz

Temperature Error + 0.2 / - 1.0 dB (0 to +50°C)

100 kHz to 5 MHz = >35 dB – 20 dB x log f

H-field Immunity

(f in MHz)

Above 5 MHz=>20dB(Typical)

Settling Time 1 second (0 to 90% of measured value) Typical

Display Refresh Rate 400 msec. Typical

Units Displayed V/m, A/m, mW/cm2, W/m2and “% of limit value”

Levels Displayed Current reading, maximum reading or average reading

Audible Alarm Variable setting, piezoelectric

Interfaces Fiber Optic, serial interface for results transfer, remote operation and calibration

Power Supply Rechargeable AA batteries (supplied)

Operating Temperature 0 to +50°C

Size (HxWxD,approx.) 18.3" x 3.78" x 2.52" (465 x 96 x 64 mm)

Weight (approx.) 450 grams

0.2 to 320 V/m (CW signals > 300 kHz)

0.2 to 10 V/m (True RMS)

175 mW/cm

17.5 W/cm

2

(CW)

2

(Peak)

0.6 to 1.2 V/m = ±1dB

1.2 to 200 V/m = ±0.5 dB

200 to 320 V/m = ±0.7 dB

>20 dB Typical

50 Years of

Excellence

Notes:

a

Referenced to 27.5 V/m and 27.12 MHz

b

Error after using supplied correction factors, includes calibration accuracy

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Safety Test Solutions

communications company

an

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

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