User Manual

42 GMC-I Gossen-Metrawatt GmbH
V/Hz, Ω, Temperature, and A/Hz Measurements
5.7.1 Direct and Pulsating Current Measurement, Direct Connection,
A DC and A (DC+AC)
(METRAHIT EXTRA, METRAHIT ETECH and
METRAHIT E
SPECIAL only)
➭ First disconnect supply power from the measuring circuit or
the power consumer (1), and discharge any capacitors.
➭ In accordance with the current to be measured, turn the rotary
switch to A or A
.
➭ Select the current type 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 indicated
by means of an acoustic signal. The current type is indicated at
the LCD by means of the DC or the (DC+AC)
TRMS
symbol.
➭ Safely connect the measuring instrument (without contact
resistance) in series to the power consumer (2) as shown.
➭ Switch supply power to the measuring circuit back on (3).
➭ 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.
➭ Disconnect supply power from the measuring circuit or the
power consumer (1) once again, and discharge any
capacitors.
➭ Remove the test probes from the measuring point and return
the measuring circuit to its normal condition.
COM mA A
~
R
x
~
R
x
1
3
2
I > 10 A
!
A
A
003 . 50
A
DC
003 . 50
A
DC
AC
TRMS
A
A
METRAHIT EXTRA
METRAHIT ESPECIAL
6 A / 10 A (16 A max. 30 s)
600 μA / 6 mA
60 mA / 600 mA
6 A / 10 A (16 A max. 30 s)
8 . 8 . 8 . 8 . 8
!
I > 16 A
Strom
Measuring Ranges:
Current measurement
may only be performed
with installed batteries!
FUNC
ENTER
METRAHIT ETECH
60 mA / 600 mA
6 A / 10 A (16 A max. 30 s)