Pre-Measurement Settings - Chauvin Arnoux CA 6470 Mode D'emploi

The ground resistivity is calculated by the Wenner method using the following formula :
Schlumberger method:
The ground resistivity is calculated by the Schlumberger method using the following formula:
4.5.2

PRE-MEASUREMENT SETTINGS

The resistivity measurement can only be performed in MANUAL mode
!
Before the measurement, use the
- select the method : Wenner or Schlumberger,
- select the measurement frequency (55, 92, 110, 119, 128Hz, or USr
- select the voltage applied (16 or 32 V).
(1)
The frequency "USr" is defined by the user for between 41 and 128 Hz using the
The distances required for the ρ calculation are programmed using the "DISTANCE"
nd nd nd
2 2 2 + +
CONFIG CONFIG CONFIG
key :
DISTANCE DISTANCE
- one distance only ,"d", for the Wenner method,
- two distances, "A" and "d", for the Schlumberger method.
The values are chosen using the
Notes :
→
the distances "A" and "d" cannot be modified during the measurement ;
→
during the measurement, you can use the
frequency, between 41 and 128 Hz only.
ρ = 2 x Π x d x R
S S-ES
ρ
= (P x (d² - A²/4)/A) x R
S S-ES
CONFIG CONFIG CONFIG
and keys to successively :
DISTANCE DISTANCE
keys , before or after the measurement.
CONFIG CONFIG CONFIG
and
DISTANCE DISTANCE
49
(1)
,
keys.
keys to modify the measurement