Mem / Mr Key - Chauvin Arnoux C.A 6470 Manual De Instrucciones

Important note: for the 3P earth and the resistivity measurement, the instrument goes back to
MANUAL mode if the frequency is changed during the measurement.
The "CONFIG" mode is exited:
- when all the modifiable parameters have been swept, or
DISPLAY DISPLAY DISPLAY
- by pressing the
SMOOTH SMOOTH
- by pressing the START/STOP button (to start a measurement), or
- by changing the position of the 5-position switch.
The DISTANCE function (second function of CONFIG.FREQUENCY key) is only used for the
ground resistivity measurement.
nd nd nd
2 2 2 + +
CONFIG CONFIG CONFIG
DISTANCE DISTANCE
This function can be activated before or after a measurement and is used to enter distance values to
be used to calculate the resistivity.
If the Wenner calculation method is used : only one distance « d » is entered.
If the Schlumberger calculation method is used : 2 distances « d » and « A » are entered.

3.2 MEM / MR KEY

The first function of this key (MEM) is used to store the measurement results in the internal
memory of the unit.
The instrument has a memory capacity of 64 kB which represents 512 records whatever the function
chosen.
Each measurement is stored in a memory location identified by indices :
- for the resistance measurement (mΩ) and the earth measurement (EARTH, 3 pole position), the
location is identified by two indices OBJ :TEST ; a single object (OBJ) can contain 99 tests ;
- for the earth coupling measurement (EARTH COUPLING, 3 pole position) which consists in 3
consecutive measurements R1, R2 and R3 (see § 4.2 p14), the result of each measurement is
stored in the same location OBJ:TEST defined on the first measurement, with the extensions 1,
2, 3 and 4 for the earth coupling calculation ;
- for the ground resistivity measurement (ρ position) , the result of each measurement is stored in a
location OBJ:TEST:DISTANCE ; OBJ:TEST is defined on the first measurement. If the distance
is changed for the next measurement, the device will propose the same OBJ:TEST, but
DISTANCE will have the new value for the changed distance.
For all the measurements, the storage procedure is the same:
Measurement
mesure à
to be stored
m é moriser
MEM MEM MEM
OBJ : TEST OBJ : TEST
03:06 03:06
FREE FREE
MEM MEM MEM
Measurement
mesure
stored
m é moris é e
(1)
address OBJ:TEST, or OBJ:TEST:1,2,3 or 4 OBJ:TEST:DISTANCE
(2)
"FREE" : the memory cell chosen is free / "OCC" : the memory cell chosen is occupied
(3)
whether occupied or not (previous values saved are written over)
key, or
(2)
Choice of storage address
and
Measurement stored
at chosen address
38
(1)
by
keys
(3)