Chauvin Arnoux C.A 6545 Notice De Fonctionnement page 49

4.7.5 Automatic measuring range
In the SET-UP, 6 th press on the
- The small display indicates rAnG
- The main display indicates Auto
Use the key to choose a fixed (1, 2 or 3 on the main display) or automatic (Auto on the main display)
measurement range
Note: The fixed measurement ranges correspond to the current ranges of the following measurements:
1 : 50 pA to 200 nA
2 : 150 nA to 50 µA
3 : 30 µA to 3 mA
The choice of a fixed measurement range optimises the measurement build-up time for a known
value of insulation resistance.
Example: Choice of range 1 for a measurement greater than 500 G Ω .
4.7.6 Test voltage limit
In the SET-UP, 7 th press on the
- The small display indicates 1000 V
- The main display indicates OFF
- Choose On or OFF using key
(adjustment by 10 V steps).
Note: This function prohibits the use of the insulation measurement from a maximum test voltage value.
This enables the device to be used by less experienced persons for specific applications (telephony,
aerospace...).
This limit may be hidden by using the application software MEGOHMVIEW.
Example: By choosing On and a test voltage limit of 750 V, the measurement will be performed
under 500 V for the corresponding position on the rotary switch, and at 750 V for all the other
positions on the rotary switch (with prior lighting of the LIM for 3 seconds on the main display).
key:
key:
and modify if necessary the value of the voltage using key
49
then key