16
16
4. CONTINUITY AND RESISTANCE
Never test resistance on a live circuit
■
Select the ohmmeter (
Ω
Ω
Ω
Ω
Ω ) ) ) ) )
function.
■
Connect the multimeter to the circuit terminals or the
component to be tested.
■
Press the
Ω /
Ω /
Ω /
Ω /
Ω /
button to go from resistance measurement
to the continuity sound test and vice-versa.
■
Automatic range selection: read off the value
■
To store value in memory, press the HOLD button.
As necessary, press the following buttons:
■
MIN-MAX to read the min. or max. values
■
to light the display
4.1 Resistance
Ω
Ω
Ω
Ω
Ω
400
Ω
4 k
Ω
40 k
Ω
400 k
Ω
4 M
Ω
40 M
Ω
Digital
resolution
0.1
Ω
1
Ω
10
Ω
100
Ω
1 k
Ω
10 k
Ω
Accuracy
± 1%
± 1% R ± 2 ct
± 2%
R ± 3 ct
R ± 3 ct
Open
circuit
≤
1.2 V
...
≤
0.45 V ...
voltage
Protection
500 V RMS and 750 V peak
4.2 Continuity sound test
On the 400
Ω
range a beep sound is given off for a resistance
R
≤
35
Ω
. Temporal response: 100 ms approx.
5. DIODE TEST
Never carry out a diode test on a live circuit
■
Select the function
■
Connect the leads to the multimeter and to the terminals
of the component to be tested.
■
In the forward bias the voltage at the junction is displayed
(1 mV resolution):
- open circuit voltage: typically 3.5 V
DC
,
- short circuit current: 1 mA,
- in the reverse bias the open circuit voltage is displayed
(in the order of 4 V),
- with no component connected, OL is displayed.
■
If desired, store the value by pressing the HOLD button.
