Operation Manual

42 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
(METRAHIT⏐X-TRA⏐OUTDOOR⏐TECH⏐PRO only)
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
Temp
Ω
~
R
x
~
R
x
1
3
2
A~
Hz
A~
Hz
003.50
A
AC
TRMS
050.10
Hz
AC
8 . 8 . 8 . 8 . 8
!
I > 10 A
!
I > 16 A
Current measurement
may only be performed
with installed batteries!
Measuring Ranges:
Current
FUNC
ENTER
METRAHIT⏐X-TRA/OUTDOOR
METRAHIT⏐PRO
1 A / 10 A (16 A max. 30 s)
100 μA / 1 mA
10 mA / 100 mA
1 A / 10 A (16 A max. 30 s)
METRAHIT⏐T
ECH
10 mA / 100 mA
1 A / 10 A (16 A max. 30 s)