Use; On/Off Function; Special Functions - Chauvin Arnoux C.A 41 Notice De Fonctionnement

The rotary switch controls switching ON the C.A 41 and measurement with or without alarm.
It has three positions: OFF, V/m and V/m (AL).

3.1. ON/OFF FUNCTION

The OFF position of the rotary switch mechanically cuts off the power supply of the instrument. turning
the switch to one of the two ON positions (V/m (AL) or V/m) applies the battery voltage to the circuits of
the instrument, for a duration of 10 minutes.
When switched ON with the rotary switch, all the segments of the display light uo for 1 second. The digital
display (11), for three seconds also displays the remaining service life of the battery, as a percentage of
its maximum capacity.
A system for saving battery power switches the instrument OFF after 10 minutes, if:
- no buttons have been pressed,
- the rotary switched has not been turned.
Before this automatic switching OFF, the field meter emits a beep at 2 kHz for 65 ms, the measurement
display flashes for 1 minute then it switches OFF.
To switch ON again, either press any of the buttons, or turn the rotary switch to one of the positions next
to its OFF position. The display will light up again and the instrument will start taking measurements again
without taking into account the function of the button which was pressed to switch it ON.

3.2. SPECIAL FUNCTIONS

There are special functions wich can only be accessed when the field meter is switched ON from the
OFF position.
These functions are summarized in the table below.
If several buttons are pressed, none of the functions of these buttons are validated.
BUTTON
No button pressed
HOLD
MIN MAX
PEAK

3. USE

Switched ON for 10 minutes
ON permanently
Switched ON without buzzer
(The symbo is not shown)
The alarm threshold can be accessed via the battery compartment.
Press and hold throughout the adjustment procedure.
29
FUNCTION
is shown on the display.