Functions Of The Instrument; Switch; Keys And Button - Chauvin Arnoux C.A 6505 Manual De Instrucciones

2.1. FUNCTIONS OF THE INSTRUMENT

The C.A 6505 megohmmeter is a portable instrument housed in a rugged field case with lid and operates
on either battery or line power. It makes voltage, insulation, and capacitance measurements.
This instrument contributes to the safety of electrical installations and equipment.
It has many advantages, for example:
automatic voltage measurement,
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automatic detection of the presence of an external AC or DC voltage on the terminals, before or

during the measurements, that disables or stops the measurements,
the simplicity of the user interface,
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calculation of the PI and of the DAR,
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 fuse protection of the instrument, with detection of a defective fuse,
operator safety thanks to the automatic discharging of the device tested,
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automatic power-down of the instrument to extend battery life,
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an indication of the battery charge condition,
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 a large backlit LCD display unit with many announciators for very easy reading.

2.2. SWITCH

The rotary switch has 8 positions:
OFF instrument powered down.
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500 V - 2 TΩ insulation measurement at 500 V, up to 2 TΩ.
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 1000 V - 4 TΩ insulation measurement at 1000 V, up to 4 TΩ.
2500 V - 10 TΩ insulation measurement at 2500 V, up to 10 TΩ.
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5000 V - 10 TΩ insulation measurement at 5000 V, up to 10 TΩ.
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Var. 50 - 5000 V insulation measurement with variable test voltage.
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 SET Var sets the user definable test voltage for the Var. 50 - 5000 V position.
SET V.LOCK sets the user definable maximum test voltage output irrespective of the insulation

measurement positions.

2.3. kEYS AND BUTTON

START/STOP This button is pressed to start then stop the measurement.
A long press starts the measurement of the DAR and of the PI.
DISPLAY
Before, during or after the measurement, pressing this key displays the various
measurement parameters.
This function is available only in the SET positions of the switch. It increments the
parameter displayed in flashing mode.
This function is available only in the SET positions of the switch. It decrements the
parameter displayed in flashing mode.
Keeping the and keys pressed accelerates the rate at which the parameters change.