Chauvin Arnoux C.A 41 Mode D'emploi page 23

- Read on the display the value in V/m of the field measured. Refer to the table below in
accordance with standards IEC 801-3 and IEC 1000-4-3 defining the levels of severity
of electromagnetic compatibility.
Electromagnetic compatibility
Level of severity
Level I
Level II
Level III
Level
- After each measurement session, switch OFF the instrument by returning the rotary
switch to the OFF position (cf. paragraph "ON/OFF FUNCTION").
Maximum value of the field
1 V/m
3 V/m
10 V/m
open class
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Remarks:
A) If the field is fluctuating (i.e. the display varies without changes in the position of the probe)
the use of the SMOOTH and PEAK functions will be particularly useful :
- SMOOTH to read an average value which is more representative of the global field.
- PEAK to identify the peaks, some of which may exceed the maximum level that is
wanted. (Example: the peaks due to the closeness of a neon light are often greater
than 3 V/m and cannot be classed as level II).
For PEAK values which occur at more than 100 ms use in addition the MIN MAX
function (cf. chapter "OPERATION").
Measurement mode
Normal measurement
Recording
(of min, max and avg.)
Smooth measurement
Recording of smooth values
Peak measurement
Recording of peak values
(1) As applicable, the MIN, MAX or AVG symbols are added to specify the type of measurement in the
particular mode.
(2) In all cases, the sampling time is 250 µs.
B) In operation, when the battery reaches a level of discharge that only just ensures correct
measurement, the battery symbol (23) appears on the display.
When the battery voltage no longer ensures the accuracy of the measurements,
" " appears on the digital display and the instrument switches OFF automatically
after 5 seconds.
Symbol (1) Measurement time (2)
400 ms
RECORD 400 ms
SMOOTH 4 s
RECORD SMOOTH 4 s
PEAK 100 ms
RECORD PEAK 1 ms
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