Measurement & Results - Chauvin Arnoux CA 6470 Mode D'emploi

4.4.3 MEASUREMENT & RESULTS
Each measurement result must be saved by pressing the
measurements are stored in the last OBJ:TEST number defined on the first measurement, with
extensions 1, 2 3 and 4.
Notes :
→ → → →
The OBJ:TEST number cannot be modified after the first measurement ;
!
→ → → →
once the first measurement has been triggered by pressing the « START/STOP »
!
pushbutton, no parameters (voltage, frequency) can be changed so long as the 3
measurements have not been completed. It is however possible, for the third measurement, to
use the cord compensation function (see below §4.2.2.2.) ;
→ → → →
the H and S electrodes must not be moved during the measurements.
!
Once the three measurements have been completed, the instrument calculates the coupling
coefficients and automatically stores them in the OBJ:TEST location in which the results of the three
measurements have been stored, with extension 4.
At the start of the measurement:
- the instrument measures U
greater than 60V
peak
- the instrument checks the connections : if incorrect, the measurement is refused and the
faulty connection symbols flash,
- the instrument possibly measures, before the 3rd measurement, the cord compensation
resistance = R∆0.
- If a spurious voltage affects the accuracy of the measurement to be performed, the "NOISE"
symbol flashes.
During the measurement,
- if a voltage > 60 V
peak
Note :
If the measurement is unstable or the measurement results are inconsistent, trigger the measurement
to check that the problem is not a faulty connection.
On completion of measurements 1 and 2, the following quantities can be displayed using
DISPLAY DISPLAY DISPLAY
the key, and saved using the
SMOOTH SMOOTH
If measurement is triggered by briefly
pressing START pushbutton
R or R
1 2
U , f
OUT measurement
U , I
S-E H-E
(1)
U "NOISE" and f , U
S-E H-E
(2)
U and f , U
S-E H-E
(1)
Accessible only if spurious voltages are present which have affected the accuracy of the
measurement ("NOISE" symbol on steady).
(2)
possible voltage present (post-measurement) across terminals.
and U (and associated frequencies) : if U
S-E H-E
, the measurement is refused,
is detected, the measurement is stopped.
MEM MEM MEM
key.
MR MR
If measurement is triggered by pressing and
,
(1)
"NOISE" and f U
(2)
and f
47
MEM MEM MEM
key ; the results of the last 3
MR MR
S-E
holding START pushbutton
R or R , R , R
1 2 H S
U , f
OUT measurement
U , I
S-E H-E
(1)
"NOISE" and f , U "NOISE"
S-E H-E
(2) (2)
U and f , U and f
S-E H-E
and U are
H-E
(1)
and f