Gossen MetraWatt METRACAL MC, Operating Instructions Manual

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40 GMC-I Messtechnik GmbH
V/Hz,
Ω
, Temperature, and A/Hz Measurements
5.8.2 Alternating Current and Frequency Measurement,
Direct Connection, mA 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
OUT | 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.
~
R
x
~
R
x
1
3
2
mA~
mA~
Hz
003
.
50
A
AC
TRMS
050
.
10
Hz
AC
8
.
8
.
8
.
8
.
8
!
Current measurement only
with batteries installed!
Current
300 μ A / 3 mA
30 mA / 300 mA
Measuring ranges:
ZERO /SEL
ESC
I > 310 mA
!
MR 300 mA
– + +
...