Metrix MX 430B Notice De Fonctionnement page 30

3 . 3 . 2 3 . 3 . 2 W Function 3 . 3 . 2 Function Function Function
3 . 3 . 2 3 . 3 . 2 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
Linear ohmmeter Linear ohmmeter
3 ) Linear ohmmeter Linear ohmmeter (protected through thermistor and varistor from any Linear ohmmeter
accidental connection to 240 V AC)
Selector to Selector to
Selector to Selector to Selector to
5 0 W
500 W
With the 500 W one can mesure the direct junction voltage of a semi-
conductor connected as follows :
- COM m A V kW / W . Constant curent 3 mA : read up to 1.5 V on black
scale 150 (V : 100).
N. B. : Linear scale (L. H. of the scale the pointer deflects to the right as a N. B. N. B. N. B. N. B.
function of resistance up to 50 or 500 W
(R
s c a l e .
Warning Warning
Warning : Do not leave the selector at 50 or 500 W with nothing at input. Warning Warning
4 ) Logarithmic ohmmeter Logarithmic ohmmeter Logarithmic ohmmeter Logarithmic ohmmeter
Logarithmic ohmmeter
Selector to Selector to Selector to Selector to Selector to
Short the leads prods. Turn the W c o n t r o l t o s e t t h e p o i n t e r t o 0 W (green scale)
with the function selector at W .
kW x 1
kW x 100
5) If the pointer does not deflect check 10 A fuse
28
Read on scale Read on scale
Read on scale Read on scale Read on scale
50
50
) t h e p o i n t e r w i l l f l y t o t h e R . H . S . o f t h e
Read on green scale Read on green scale
Read on green scale Read on green scale Read on green scale
kW
green
MX 430B
from from
from from from
W x 1
W x 1 0
with input open
from from
from from from
0 . 1 kW up to 200 kW
10 kW up to 20 MW