Use; Measurement Procedure; Insulation Measurement (See § 3.2) - Chauvin Arnoux C.A 6545 Notice De Fonctionnement

5.1

Measurement procedure

Start up the instrument by setting the switch to the corresponding position. All the segments of the
LCD screen are displayed, then the battery voltage.
Connect the + and - leads to the measurement points.
The voltage is measured continuously and indicated on the small display.
If an external voltage higher than the authorised limit value (see § 3.2) is present, the measurement
will be inhibited.
A press on START/STOP starts the measurement.
Another press on START/STOP stops the measurement. The last result remains displayed until the
next measurement or the rotation of the switch.
If a voltage higher than the authorised limit value (see § 3.2) appears during all the measurements, the
device will indicate this voltage on the small display using the flashing warning symbol and stop the
measurement in progress.
Note: A certain number of special functions may be used (see § 4).
5.2 Insulation measurement (see § 3.2)
With this function, the instrument can measure insulation between 10 kΩ and 10 TΩ, according to the chosen
test voltage (among 500 - 1000 - 2500 - 5000 V) or programmed voltage (between 40 V and 5100 V).
Position the switch on "500 V-2 TΩ", or "1000 V-4 TΩ", or "2500 V-10 TΩ", or "5000 V-10 TΩ" or
"Var 50-5000 V"
Connect the device to the part to be tested.
!
If the voltage present is higher than the authorised limit value (see § 3.2) the measurement
will be inhibited.
Start the measurement and note the results.
It is possible to scroll through all the results on the main display using the R-DAR-PI-DD key (see § 4.3)
or on the small display using the V-TIME key (see § 4.2).
R (t) is used to access the intermediate values measured and memorised at a rate set in the SET-UP, in
"Programmed-time test" mode. These samples are available until the start of another measurement or
until the next rotation of the switch (see § 4.3)
To measure high insulation values (> 1 GΩ Ω Ω Ω Ω ), you are advised to use the "G" guard terminal to remove
the influence of superficial leak currents or eliminate the influence of superficial leak currents. The guard
terminal will be connected to a surface capable of being the circulation base of superficial currents via
dust and humidity: for example, the insulation surface of a cable or transformer, between two measurement
points.
As soon as insulation measurements stop, the tested circuit is automatically discharged via an
internal resistor of the device.

5. USE

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