Battery; Description; Case; Display - Chauvin Arnoux C.A 41 Mode D'emploi

DESCRIPTION

CASE

1 Connector for the measurement probe,
2 button
HOLD
. storage in memory of the last digital value displayed,
. permanent operation.
3 button
PEAK
. measurement of the peak values and 50Hz filter OFF.
4 Demodulation control,
5 BNC socket for analogue output,
6 3 position rotary switch,
7 button
MIN MAX
. recording of min, max and average values,
. buzzer OFF
8 button
SMOOTH
. measurement filtering.
Notes : Under the case is the battery compartment and a ¼" UNC lug (KODAK size) for
mounting the C.A 41 on a photographic type support.

DISPLAY

9 Alarm function ON,
10 Alarm threshold crossed,
11 Display of the remaining service life as a % of capacity,
12 Fixed log scale,
13 Analogue bargraph display,
14 Beyond end of scale,
15 Unit of measurement in Volts per metre,
16 Set decimal point,
17 Digital measurement in SMOOTH values,
18 Measurement of PEAK values,
19 RECORD temporarily stopped,
20 MAX, MIN and AVG recording ON,
21 Instrument permanantly ON,
22 Digital readout of AVG,
23 Low battery,
24 Buzzer ON,
25 Digital readout of the MAX memory,
26 Digital readout of the MIN memory,
27 HOLD the last measurement,
28 2000 count digital display.
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PRESENTATION

Pollution of the radio-electric environment is becoming more and more severe, which leads
to problems of malfunctioning in many types of electrical equipment, especially since the use
of sequential logic and the development of microprocessors.
These modern techniques are used in practically all types of industrial equipment which
makes them particularly sensitive to interference and electromagnetic disturbances.
The C.A 41, manufactured by CHAUVIN ARNOUX, allows the user to measure these levels
of disturbance.
Measurements are of two types :
Measurement of atmosphere (susceptibility)
This measurement indicates the value of the electromagnetic field in which equipment
is located, in order to check that this field does not exceed the permitted limits in
accordance with standards 801-3 and IEC 1000-4-3 or similar.
Measurement of emissivity (radiation)
This measurement indicates the value of the electromagnetic field emitted by
equipment which is switched ON, and consequently its class of electromagnetic
compatibility in accordance with the applicable standard.
The C.A 41 is a small portable instrument that measures the electric field present in the
atmosphere surrounding its measurement probe.
This probe consists of an aerial combined with a high frequency detector. The wide passband
of this unit enables the measurement of electrical fields from 0.1 V/m to 200 V/m for frequencies
between 100 kHz and 2.5 GHz.
The connection between the measurement probe and the base instrument is made via a
socket which allows the measurement probe to be removed during transportation.
The use of microprocessors for measurement, calculations and management of the display
makes the instrument simple to use and very accurate.
The large dimensions of the LCD comprise a 2000 count digital display, a logarithmic 40-
segment bargraph and a display of the different measurement symbols that provide easy
reading for the user.
An analogue output allows the measurement to be controlled at a distance for recording on
a plotter or an analogue recorder with a minimum impedance of 100 kΩ.
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