Atec Narda-EMR-20-30 - Manual (Page 4)

Subject
to
change
without
notice
±
EM/EN/D028/
09.99/AE/r
epl
935
±
Printed
in
Germany
Specifications* of the Radiation Meters EMR-20, EMR-30
Radiation measurement
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . electrical field (E)
Frequency range . . . . . . . . . . . . . . . . . . . . . . 100 kHz to 3 GHz
Specified measurement principle . digital triaxial measurement
Directional pattern . . . . . . . . . . . . . . . isotropic, 3-dimensional
Measurement range
CW signals (f 4300 kHz) . . . . . . . . . . . . . . 0.6 V/m to 800 V/m
true RMS . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.6 V/m to 20 V/m
Range selection . . . . . . . . . . . . . . one single continuous range
with 462 dB dynamic
Display resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.01 V/m
Absolute error at 27.5 V/m and 27.12 MHz . . . . . . . . . . +1 dB
Linearity referred to 27.5 V/m and 27.12 MHz
from 0.6 V/m to 1.25 V/m . . . . . . . . . . . . . . . . . . . . . . +3 dB
from 1.25 V/m to 2.5 V/m . . . . . . . . . . . . . . . . . . . . . . +1 dB
from 2.5 V/m to 400 V/m . . . . . . . . . . . . . . . . . . . . . +0.5 dB
from 400 V/m to 800 V/m . . . . . . . . . . . . . . . . . . . . +0.7 dB
Frequency response:
EMR-20C/-30C with consideration
of CAL factor and inclusive of calibration accuracy
from 100 kHz to 100 MHz . . . . . . . . . . . . . . . . . . . +0.45 dB
from 100 MHz to 3 GHz . . . . . . . . . . . . . . . . . . . . . . +1.4 dB
EMR-20/-30 with consideration of typical CAL factor
from 100 kHz to 100 MHz . . . . . . . . . . . . . . . . . . . . +1.0 dB
from 100 MHz to 1 GHz . . . . . . . . . . . . . . . . . . . . . . +1.5 dB
from 1 GHz to 3 GHz . . . . . . . . . . . . . . . . . . . . . . . . +2.4 dB
Isotropic deviation
Field sensor only . . . . . . . . . . . . . . typ. +0.5 dB for f 41 MHz
Field sensor plus
radiation meter . . . . . . . . . . . . . . . . typ. +1.0 dB for f 41 MHz
Temperature dependency (0 to +50 8C) . . . . . . . . . +0.2/±1 dB
Overload protection CW / impulse . . . . 0.7 W/cm 2 / 70 W/cm 2
Suppression H/E
from 100 kHz to 5 MHz . . . . . 435 dB ± 20 dB6log (f/MHz)
above 5 MHz. . . . . . . . . . . . . . . . . . . . . . . . typically 420 dB
Settling time . . . . . . . . . typically 1 s (0 to 90% of meas. value)
Display refresh rate . . . . . . . . . . . . . . . . . . . . . typically 400 ms
Display and warning circuits
Display type . . . . . . . . . . . . . . . . . . . . LCD, instrument specific
Visible warning . . . . . . . . . . . bright red LEDs in the foil keypad
Audible warning . . . . . . . . . . . . . . built-in piezoelectric device,
tone sequence depending on measured value
Measurement functions
Units . . . . . . . . . . . V/m, A/m, mW/cm 2 , W/m 2 , % of limit value
Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . diode rectifier
Result display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . current result
or maximum value since switch-on
Averaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . current result or
6-minute average
Alarm functions . . . . . . . . . . . . . . variable threshold and on/off
Calibration data . . . . . . . . . . . . . . . . . . one CAL factor settable
Self tests
Automatic switch-on self test of
A/D converter, battery, supply voltages, memory and
zero adjustment.
Periodical zero adjustment and battery check during
operation.
All tests can be performed during exposure to the field.
Calibration
EMR-20/-30 with linearity calibration certificate and typical
CAL factors for frequency response included.
EMR-20C/-30C with calibration report and special calibration
of frequency response, isotropy and linearity.
Recommended confirmation interval . . . . . . . . . . . . 24 months
Interfaces
Serial interface for results transfer, remote operation
and calibration . . . . . . . . . . . V.24 (RS232) optical/bidirectional
Additional functions EMR-30/EMR-30C
Result storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500 values
Real-time clock
Spatial averaging within a time period or over measurement
points.
General specifications
Power supply
Rechargeable batteries . . . . . . . . . . . . . . 26Mignon (AA) 1.2 V
Dry batteries . . . . . . . . . . . . . . . . . . . . . . . 26Mignon (AA) 1.5 V
Operating time
rechargeable / dry batteries. . . . . . . . . . . . . . . typ. 8 h / 415 h
Recharging . . . . . . . . . . . . . using NT-20 Charger Unit supplied
Ambient temperature
Operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +50 8C
Dimensions (w6h6d) in mm . . . . . . . approx. 966646465
(incl. sensor and impact protection)
Weight (incl. batteries)... . . . . . . . . . . . . . . . . . . approx. 450 g
* Unless otherwise stated, the data are valid for the following conditions:
sinusoidal signals;
instrument in the far-field of the source, sensor showing to the source;
ambient temperature 23 8C +3 8C;
relative air humidity 25 to 75 %.
Ordering information
EMR-20 Radiation Meter BN 2244/20
EMR-20C Radiation Meter BN 2244/70
with special calibration
EMR-30 Radiation Meter BN 2244/30
EMR-30C Radiation Meter BN 2244/80
with special calibration
Supplied with:
Impact protection with strap and tripod bush
NiCd cells, Mignon (AA) size
NT-20 Charger Unit (please specify type)
Euro version BN 2238/90.02
UK version BN 2238/90.03
US version BN 2238/90.04
Australian version BN 2238/90.05
Accessories :
Soft case BN 2244/60
Tripod, non-metallic BN 2244/90.31
Support, non-metallic BN 2244/90.32
Warning sign ªElectromagnetic Radiationº
large, 2 pieces BN 2244/90.36
small, 10 pieces BN 2244/90.37
ETS-1 PC Transfer Set BN 2244/90.33
(O/E converter, fiber cable, floppy disk)
NiCd/NiMH battery charger
(Euro version) BN 2237/90.03
Handheld test generator, 27 MHz BN 2244/90.38
Sensor extension, 1.2 m, flexible BN 2244/90.35
Storage case, aluminium-lined BN 2244/62
Safety Test Solutions
from Wandel & Goltermann