Operation Manual

40 GMC-I Messtechnik GmbH
Measurements: V/Hz – Ω – – Temp – – m – A/Hz
5.7.2 Alternating Current and Frequency Measurement,
Direct Connection, A AC and Hz
Ð First disconnect supply power from the measuring circuit or
the power consumer (1), and discharge any capacitors.
Ð In accordance with the current or frequency to be measured,
turn the rotary switch to A~ or Hz.
Ð Select the desired measured quantity by briefly pressing the
FUNC | ENTER multifunction key. Each time the key is pressed,
AC
TRMS
and Hz are alternately selected, and
switching is acknowledged with an acoustic signal.
Ð Safely connect the measuring instrument (without contact
resistance) in series to the power consumer 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~
Hz
A~
Hz
003.50
mA
AC
TRMS
0050.1
Hz
AC
88 . 8 . 8 . 8
!
!
I > 1.2 A
Current measurement
may only be performed
with installed batteries!
Current
FUNC
ENTER
Measuring ranges:
Hz: 1 Hz . . . 31 kHz
A ~: 3 μA . . . 1.1 A
5 ranges: 300 μA, 3 mA, 30 mA, 300 mA and 1 A
3 ranges: 300 Hz, 3 kHz and 30 kHz