12 GMC-I
Messtechnik
GmbH
4.4
Current Measurement
Attention!
!
The multimeter must always be connected into the lead
the voltage of which is the lowest relative to earth. For
safety reasons, the voltage relative to earth must not ex-
ceed 500 V CAT II!
Observe the overload limits, see tables
on page 23.
4.4.1 DC and AC Voltages (METRA HIT 2A: up to 1.5 A)
➭
Set range switch to the position
5 A
or 5 A
(METRA HIT
2A: 1.5 A
or 1.5 A
).
➭
Plug test leads into the instru-
ment; (black) test lead to socket
„
⊥
“ and (red) lead to „+ V, A
“.
➭
Disconnect the power supply to
the measuring circuit, and/or
the power consumer (R
v
) and
discharge all capacitors, if avail-
able.
➭
Interrupt the measuring circuit
and safely connect the measur-
ing leads (without contact resis-
tance!) in series with the power consumer R
v
. Note polarity
sign when measuring direct current! Negative to „
⊥
“ socket
and positive to „+V, A
“ socket.
➭
Connect power supply to measuring circuit again.
