Manual

50 Gossen Metrawatt GmbH
8.15.2 Alternating Current and Frequency Measurement, Direct
Connection, – AAC and Hz
➭ First disconnect supply power from the measuring circuit or
the power consumer (1), and discharge any capacitors.
➭ Set the rotary switch to A (A ).
➭ Repeatedly press the Func softkey until the desired measuring
function is displayed.
➭ If necessary, conduct zero balancing for AAC by pressing the
Zero softkey (see description below).
➭ Safely connect the measuring instrument (without contact re-
sistance) in series to the power consumer as shown.
➭ Switch supply power to the measuring circuit back on (3).
➭ 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.
➭ Disconnect supply power from the measuring circuit or the
power consumer (1) once again, and discharge any capaci-
tors.
➭ Remove the test probes from the measuring point and return
the measuring circuit to its normal condition.
Improving Accuracy by means of Zero Balancing – Zero
The momentarily measured current value can be subtracted from
future measurements in all measuring ranges.
➭ Press the Zero softkey.
➭ The value ascertained for Zero is saved and appears above the
measurement display. Automatic compensation is imple-
mented for future measurements.
➭ The value for Zero is retained when the instrument is switched
to a different measuring function. The correction or offset value
is deleted by pressing Zero once again, or when the instrument
is switched off. The value is cleared from the display.
S– A
V
Tem p
m/4
COIL
S+
A
A
~
R
x
~
R
x
1
3
2
!
I > 1 A
A~: 10 nA ... 1 A
5 ranges:
300 A / 3 mA / 30 mA /
300 mA / 1 A
A AC Measuring Range:
Current
300 Hz / 3 kHz /
4 ranges:
30 kHz / 300 kHz
Hz: 0.01 ... 300 kHz,
Hz Measuring Range:
Func
Func
ADC
A(AC+DC)
AAC
Hz
Func
FuncZero