Resistance, Continuity, Diode And Capacitance; Current - Chauvin Arnoux C.A 757 Notice De Fonctionnement

2.3. RESISTANCE, CONTINUITY, DIODE AND
CAPACITANCE
„ Connect the red probe tip to the + terminal and the black
probe tip to the COM terminal.
„ Set the switch to W.
„ Keep your hands behind the guards of the device and of
the test probe.
„ Place the test probes on the element to be tested (Figure
12). If a voltage is present, the instrument so indicates.
Do not make a resistance, diode, continuity, or capac-
itance measurement on a live circuit.
As default, the instrument is in automatic mode (
chooses automatically among the resistance
ty , diode
one of these functions, press the Select key (the
symbol disappears).
Resistance and continuity
If the resistance is less than 300 W, the instrument is in con-
tinuity (Figure 11). Below 30 W, it emits a continuous beep.
Between 300 W and 3 MW, the instrument is in resistance
mode. Above 3 MW, the display unit indicates OL. The 30 MW
range is not available in automatic mode; resistance mode
must be used.
Diode
„ In diode test, place the red probe tip on the anode of the
diode to be tested and the black probe tip on the cathode.
„ The instrument indicates the voltage of the diode. If it
is above 2V or if the polarity is reversed, the instrument
displays - - - -.
Capacitance
The 3mF and 30mF ranges are not available in automatic
mode; capacitance mode
If the device displays dis.C after a measurement, wait for
the end of automatic discharging of the capacitance before
making another measurement.

2.4. CURRENT

„ Connect the current sensor to the + terminal.
„ Set the switch to A.
„ Press on the yellow opening device to open the flexible
coil (Figure 13).
„ Open it and place it around the conductor carrying the
current to be measured (Figure 14) (only one conductor
in the sensor).
„ Close the coil. To optimize measurement quality, centre
the conductor in the coil and make the coil as round as
possible.
„ The current is displayed.
, and capacitance
must be used.
21
SCAN
, continui-
functions. To force
) and
SCAN