Chauvin Arnoux C.A 6121 Mode D'emploi page 33

How to perform the measurement ?
1. Set the rotary switch to the HV (high voltage) position; the following screen is displayed :
Function name
Leakage current
(main result)
Un key to select
nominal test voltage
2. Select the test parameters as follows :
Character of the displayed test current (fig. 5)
- Press I key and keep it pressed (approx. 2 s) until the menu for selection of
current character is displayed.
- Press ñ to select resistive part (the
mA unit), capacitive part (the
or absolute value (nothing is displayed above the mA unit).
- Press EXIT key to exit this menu
Tripping out current (fig. 6)
- Press I key to open the tripping out current selection menu.
- Press the ñ or ò keys to choose the tripping current.
- Press EXIT key to exit this menu
Test voltage
- Press the U key to choose the test voltage between 1 kV, 1.25 kV or 1.5 kV.
N
Timer ON/ OFF
- Press the TIMER key to validate the timer (the chosen test time is displayed)
or not validate the timer (the test time is not displayed).
Duration of the test (fig. 7)
- Press the TIMER key and keep it pressed (approx. 2 s) until the menu for
selection of the timer value is displayed.
- Press the ñ or ò keys to select the duration of the test.
- Press EXIT key to exit this menu
NOTES : The value of the test current threshold that has been defined is always
compared to the absolute value of the test current, whatever the chosen
character displayed: resistive (real) or capacitive (imaginary).
i
0
R
i
C
-jIm
Fig. 3. Test current diagram
Nominal test voltage
HV
_ _ _ _ mA
Un
Fig.4. Basic screen in HV position
symbol is displayed above the
symbol is displayed above the mA unit),
Re
i = i + i
A C R
i .....absolute value of current
A
i .....capacitive current
C
i .....resistive current
R
Tripping out current
1000V 1mA
U:_ _ _ _ kV
1mn 00s
I Timer
I key to select tripping out
current or to select character
of displayed leakage current
33
Test voltage
Set timer value
Timer key to set timer
value or to switch it on/off
HV
1000V
_ _ _ _ mA
U:_ _ _ _ kV
Set Character
Exit
Fig.5. Menu for selection of test
current character
HV
1000V
_ _ _ _ mA U:_ _ _ _ kV
Set Imax
Exit
Fig.6. Menu for selection of tripping
out current
HV 1000V
_ _ _ _ mA
U:_ _ _ _ kV
Set Timer
Fig.7. Timer value selection menu
1mA
1mn 00s
1mA
1mn 00s
1mA
1mn 00s
Exit