MX 430B
28
3.3.2 3.3.2
3.3.2 3.3.2
3.3.2 W
Function Function
Function Function
Function
1) Leads plugged into : - COM and mA V / kW / W sockets
2) Make sure that there is no voltage across the resistance to be tested
3)
Linear ohmmeter Linear ohmmeter
Linear ohmmeter Linear ohmmeter
Linear ohmmeter (protected through thermistor and varistor from any
accidental connection to 240 V AC)
With the 500 W one can mesure the direct junction voltage of a semi-
conductor connected as follows :
- C O M mA V k W / W . Constant curent 3 mA : read up to 1.5 V on black
scale 150 (V : 100).
N. B.N. B.
N. B.N. B.
N. B. : Linear scale (L. H. of the scale the pointer deflects to the right as a
function of resistance up to 50 or 500 W with input open
(R
) the pointer will fly to the R.H.S. of the
scale.
WarningWarning
WarningWarning
Warning : Do not leave the selector at 50 or 500 W with nothing at input.
4)
Logarithmic ohmmeter Logarithmic ohmmeter
Logarithmic ohmmeter Logarithmic ohmmeter
Logarithmic ohmmeter
Short the leads prods. Turn the W control to set the pointer to 0 W (green scale)
with the function selector at W .
Selector toSelector to
Selector toSelector to
Selector to
50 W
500 W
Read on scaleRead on scale
Read on scaleRead on scale
Read on scale
50
50
fromfrom
fromfrom
from
W x 1
W x 10
fromfrom
fromfrom
from
0.1 k W up to 200 k W
10 kW up to 20 M W
Read on green scaleRead on green scale
Read on green scaleRead on green scale
Read on green scale
kW
green
Selector toSelector to
Selector toSelector to
Selector to
kW x 1
kW x 100
5) If the pointer does not deflect check 10 A fuse
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