Chauvin Arnoux C.A 6549 Notice De Fonctionnement page 93

 Connection diagram for measurement of high insulation values
a) Example of a motor (reduction of capacitive effects)
b) Example of a cable (reduction of surface leakage effects)
Braid
External insulator
Cable
 Unless the step function mode is selected (Adj. Step), select the measurement mode to be used
(Manual Stop, Manual Stop + DD, Timed Run, Timed Run + DD, DAR or PI) by pressing the MODE
key (see § 4.1)
 A press on START/STOP triggers the measurement.
If the voltage present is greater than the maximum allowed value, the measurement will be disabled
(see § 3.2).
The DISPLAY key can be used to consult all information available during the measurement.
This information depends on the measurement mode selected (see § 4.2).
If the insulation values displayed are very unstable, a digital fi lter can be activated by pressing
SMOOTH to smooth them (see § 4.4).
The alarm mode can be activated by pressing ALARM. An audible beep will sound if the measurement
result is below the value defi ned in SET-UP (see § 4.5).
Pressing START/STOP again stops the measurement.

The last result remains displayed until the next measurement is made, the MODE is changed or the
switch is turned.
When the insulation measurements stop, the circuit tested is automatically discharged via a resistor in
the instrument.
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Insulator
Guard
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Core
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