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44 GMC-I Messtechnik GmbH
V/Hz, Ω, Temperature, and A/Hz Measurements
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, 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
multifunction key FUNC | ENTER. Each time the key is pressed,
AC
TRMS
and Hz are alternately selected, and switching is ac-
knowledged with an acoustic signal.
Ð Safely connect the measuring instrument (without contact re-
sistance) in series to the power consumer as shown.
Ð Switch supply power to the measuring circuit back on.
Ð Read the display. Make a note of the measured value if the in-
strument is not being operated in the memory mode or the
transmission mode.
Ð Disconnect supply power from the measuring circuit or the
power consumer 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
~
R
x
~
R
x
1
3
2
A~
Hz
A~
Hz
050.100
Hz
AC
!
I > 10 A
!
I > 16 A
Current measurement may only
be performed with installed bat-
teries!
Current
FUNC
ENTER
300 μA / 3 mA
3 A / 10 A (10 A max. 5 min)
Measuring Ranges:
30 mA / 300 mA
*
Additional temperature display
(internal temperature at jacks)
in the 3 A and 10 A ranges
03
.500
A
TRMS
24.6° C
*
Hz
A
(16 A max. 30 s)
8
.
8
.
8
.
8
.
8
03.500
A
AC
TRMS
24. C
*
015
.
000
Hz
44


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