Presentation - Chauvin Arnoux C.A 6250 Manual De Instrucciones

The C.A 6250 microhmmeter is a top-quality portable digital measuring instrument with backlit LCD
display. It is designed to measure very small resistances.
Housed in a rugged construction-site type case with cover, the C.A 6250 is a self-contained instrument
powered by a rechargeable battery with built-in charger.
It provides 7 measurement ranges, from 5 mΩ to 2,500 Ω, that can be accessed and selected directly
on the front-panel rotary switch.
It uses the 4-wire measurement method (see 3.1.1), with automatic compensation of spurious voltages.
It has many advantages :
- automatic detection of the presence of an external AC or DC voltage on the terminals, before or
during the measurement, which disables or stops the measurements when measurement accuracy
is no longer guaranteed,
- 3 different measurement modes depending on the nature of the resistance to be measured,
- protection of the operator when a resistance having a large inductive component (motor, transformer,
etc.) is measured. After the measurement, the instrument automatically discharges the inductance
if the measuring cords are left connected to the inductive resistance measured.
- programming of alarm
- possibility of measuring the measurement temperature using a Pt100 jack on the front panel,
- function for automatic calculation of the resistance at a reference temperature using the possibility
of selecting the type of metal the resistance is made of and its temperature coefficient,
- extended memory making it possible to store approximately 1,500 measurements,
- indication of the level of memory use,
- indication of battery charge condition,
- automatic switching of the backlighting to standby to save battery power,
- RS 232 interface to print the results on a serial printer or export them to a PC.
Its main applications are:
bonding measurements,
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earth continuity measurements,
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motor and transformer resistance measurements,
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contact resistance measurements,
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component measurements,
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electric cable resistance measurements,
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tests of mechanical links.
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1. PRESENTATION

thresholds (alarms
26
in the form of audible beeps),