Chauvin Arnoux C.A 6470, User Manual, Page: 53 / 140

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4.5.3.2 MEASUREMENT BY "SCHLUMBERGER" METHOD:
On completion of the measurement, the following quantities can be displayed using the
DISPLAY
SMOOTH
DISPLAY DISPLAY
SMOOTH
key, and saved using the
MEM
MR
MEM MEM
MR
key :
If measurement is triggered by briefly
pressing START pushbutton
If measurement is triggered by pressing and
holding START pushbutton
ρ
S
, A, d
R
S-ES
U
OUT
, F
measurement
U
S-ES,
I
H-E
U
S-ES
"NOISE"
(1)
and f
U
H-E
"NOISE"
(1)
and f
U
S-ES
(2)
and f , U
H-E
(2)
and f
ρ
S
, A ,d
R
S-ES
U
OUT
, f
measurement
R
PE
, R
PH
, R
P-ES
, R
PS
U
SES
, I
HE
U
S-ES
"NOISE"
(1)
and f
U
H-E
"NOISE"
(1)
and f
U
S-ES
(2)
and f , U
H-E
(2)
and f
(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.
4.5.4 CHARACTERISTICS :
Open circuit voltage 16 or 32 V rms
Short-circuit current > 200mA
Max. acceptable spurious voltage 60V
peak
Maximum overvoltage 250V rms
Measurement duration 8 s (pushbutton pressed briefly) – 20 s (pushbutton pressed
and held)
Maximum resistance of probes H,
E, S, ES
100k
Ω
Resistivity measurement R
S-ES
Measurement range
0.01 – 9.99
Ω
10.0 – 99.9
Ω
100 - 999
Ω
1.00 – 9.99k
Ω
10.0 – 99.9k
Ω
Resolution 0.01
Ω
0.1
Ω
1
Ω
10
Ω
100
Ω
Intrinsic error ± (2% + 1pt)
R
probe
≤
100k
Ω
R
probe
/R
S-ES
≤
2000
Measurement frequency = 41 to 128 Hz
Spurious voltage null or
≤ 60V
peak
and (f
meas
– f
dist
) > 0.2
± (7% +2pt)
R
probe
≤
50k
Ω
R
probe
/R
S-ES
≤
10000
Measurement frequency = 41 to 128 Hz
Spurious voltage null or
≤
60V
peak
and (f
meas
– f
dist
) > 0.2
± (15% +3pt)
Operating error
R
probe
≤ 10k
Ω
R
probe
/R
S-ES
≤
20000
Measurement frequency = 41 to 128 Hz
Spurious voltage null or
≤
60V
peak
and (f
meas
– f
dist
) > 0.2
± (20% + 1pt)
Measurement resistance of probes R
H
, R
E
, R
S
, R
ES
Measurement range
0.01 – 9.99
Ω
10.0 – 99.9
Ω
100 - 999
Ω
1.00-9.99k
Ω
10.0-99.9k
Ω
Resolution
0.01
Ω
0.1
Ω
1
Ω
10
Ω
100
Ω
Intrinsic error ± (10% + 2pt) at 128 Hz