Presentation; General Presentation; The Megohmmeter; Accessories - Chauvin Arnoux C.A 6531 Notice De Fonctionnement

1.1

General Presentation

1.1.1 The Megohmmeter

These portable instruments function with batteries or a vehicle
battery.
They can be used to check insulation and voltages and to
measure resistances.
The C.A 6531 can also be used for:
measurement of the capacitance of a telephone line
current measurement
measurement of the pure alternating component of a DC
voltage.
These megohmmeters help to ensure the safety of electrical
and telephone installations.
The acquisition, processing and display of the measurements
are managed by a microprocessor.
They offer a wide range of advantages such as:
automatic detection of the presence of a dangerous voltage
on the terminals in MΩ calibres (all insulation measurement
blocked if U > 25 V),
protection of the instrument against external voltage surges,
operator safety by means of automatic discharge of the high
voltage on the equipment tested,
display of the difference compared to a measurement value
in memory,
measurement of the length of a telephone line according to
its capacitance per km unit length (C.A 6531),
automatic shutdown of the instrument to save the batteries
and indication of the battery charge,
fuse testing by periodic checks during current measurement
(C.A 6531),
a large backlit LCD screen with a wide range of indicators
making it very easy for the user to read.

1.1.2 Accessories

Carrying bag (part of standard delivery, see § 10)
When placed in the carrying bag, the instrument can either be
carried on the shoulder to transport it or around the neck for
use. This leaves the users' hands free to perform the
measurements. Since the instrument is perpendicular to the
chest, it is easy to read.
At the bottom of the shoulder bag, underneath the instrument,
there is a pocket for the leads, the touch prod, the crocodile
clamp and the remote control probe.
Remote control probe (option, see § 10)
This probe is plugged in to a special connector.
It can be used for all the measurements, including activation of
insulation testing, using the yellow button which works in exactly
the same way as the button on the instrument.

1. PRESENTATION

26