Resistance / Continuity Measurement (Mω Position); Connections; Pre-Measurement Settings; Instrument Settings - Chauvin Arnoux C.A 6470 Manual De Instrucciones

4.2 RESISTANCE / CONTINUITY MEASUREMENT (mΩ Ω Ω Ω position)
The instrument is designed to measure resistances of up to 100 kΩ; the measurement DC current is
≥200mA up to 20Ω (IEC standard 61557-4).
4.2.1

CONNECTIONS

2-pole connection
H H
R R
E E
4.2.2

PRE-MEASUREMENT SETTINGS

4.2.2.1

INSTRUMENT SETTINGS

Before performing the measurement, use the
→ select the measurement mode (MANUAL or AUTOmatic),
→ select the number of poles for the measurement (2 or 4 poles),
→ in manual mode, select the measurement current polarity.
By its default configuration, the instrument places
itself in MANUAL mode and performs a 2-pole measurement.
4.2.2.2

MEASUREMENT CORD COMPENSATION :

For 2-pole measurement only, in manual or automatic mode.
The cord compensation function can also be used for coupling measurements before
performing the last 2-pole measurement (see §4.2.2.2).
→ → → →
Cord compensation is not possible during a measurement.
!
- short-circuit the measurement cords,
nd
- press the 2 key then the START/STOP pushbutton.
R R R
∆ ∆ ∆
0 0 0
- the symbol is displayed once the compensation is achieved: this function will be
used until the rotary switch position is changed.
Note : if the compensation resistance is > 5
R R R
∆ ∆ ∆
0 0 0
symbol will disappear.
4.2.3 MEASUREMENT & RESULTS
At the start of the measurement,:
- the instrument measures U
measurement) : if greater than 60V
4-pole connection
H H
S S
R R
ES ES
E E
CONFIG CONFIG CONFIG
and keys to successively :
DISTANCE DISTANCE
Ω Ω Ω Ω
, or in the event of an incorrect connection, the
(2-wire measurement) or U
H-E
, the measurement is refused,
peak
42
and U (4-wire
S-ES H-E