Operation Manual

GMC-I Messtechnik GmbH 39
Measurements: V/Hz – Ω – – Temp – – m – A/Hz
5.7.1 Direct and Pulsating Current Measurement, Direct Connection,
A DC and A (DC+AC)
Ð First disconnect supply power from the measuring circuit or
the power consumer (1), and discharge any capacitors.
Ð In accordance with the current to be measured, set the rotary
switch to A or A .
Ð Select the type of current appropriate for the measured
quantity by briefly pressing the FUNC | ENTER multifunction key.
Each time the key is pressed, the instrument is switched back
and forth between A DC and A (DC + AC)
TRMS
, which is indi-
cated by means of an acoustic signal. The current type is indi-
cated at the LCD by means of the DC or the (DC+AC)
TRMS
symbol.
Ð Safely connect the measuring instrument (without contact
resistance) in series to the power consumer (2) as shown.
Ð Switch supply power to the measuring circuit back on (3).
Ð Read the display. Make a note of the measured value if the
instrument is not being operated in the memory mode or the
transmission mode.
Ð Disconnect supply power from the measuring circuit or the
power consumer (1) once again, and discharge any
capacitors.
Ð Remove the test probes from the measuring point and return
the measuring circuit to its normal condition.
COM mA A
V
Tem p
Ω
aEb
~
R
x
~
R
x
1
3
2
!
A
A
003.50
mA
DC
003.50
mA
DC
AC
TRMS
A
A
A: 0.1 μA . . . 1.1 A
A: 3 μA . . . 1.1 A
5 ranges: 300 μA, 3 mA, 30 mA, 300 mA and 1 A
88 . 8 . 8 . 8
!
I > 1.2 A
Current
Measuring ranges:
FUNC
ENTER
Current measurement may
only be performed with
installed batteries!