Presentation; The Megohmmeter; The Accessories - Chauvin Arnoux C.A 6549 Manual De Instrucciones

1.1. THE MEGOHMMETER

The C.A 6549 megohmmeter is a portable unit, fi tted into a rugged construction site casing with cover,
operating on battery or line power.
Its main functions are:
 automatic detection and measurement of voltage, frequency, input current,
 quantitative and qualitative insulation measurement:
 measurement at 500, 1000, 2500, 5000 V
("adjustable voltage"),
measurement in voltage step mode (the applied voltage increases in steps),

automatic calculation of DAR/PI and DD (dielectric discharge index) quality ratios,

 automatic calculation of measurement result referred to a reference temperature.
 automatic capacitance measurement,
 automatic measurement of residual current.
This megohmmeter helps to ensure the safety of electrical installations and equipment.
Its operation is controlled by microprocessor for the acquisition, processing, measurement display,
storage and printing of results.
It offers a wide range of advantages such as:
 digital fi ltering of insulation measurements,
 automatic voltage measurement,
 threshold programming, to trigger alarms using audible beeps,
 the timer for measurement duration checks,
 protection of the device by fuse, with detection of defective fuses,
 operator safety by means of automatic discharge of the test voltage on the equipment tested,
 automatic power save mode of the device to save battery power,
 indication of battery charge condition,
 large graphic display with backlight capability,
 memory (128 kB), real time clock and serial interface,
 PC control of the device (using PC software, optional),
 printing in RS 232 or Centronics mode.

1.2. THE ACCESSORIES

1.2.1. MEASURING CABLES
The megohmmeter is delivered with 4 measuring cables as standard:
 2 3m safety cables (red & black with rear pick up), with an HV plug for connection to the instrument
and an HV alligator clip for connection to the item tested
 2 blue cables (3 m and 0.3 m with rear pick up) to measure high insulation values (see § 5.1).
Optionally, you can order the same cables in lengths of 8 m and 15 m, and also simplifi ed cables (the
alligator clip is replaced by a 4 mm banana jack to which standard alligator clips or contact pins can
be connected).

1. PRESENTATION

or other test voltage between 40 and 5100 V
DC
62
DC