5
®
Description of the instrument
This instrument will measure a range of electrical
quantities, including power and energy within a
very large measuring range with a high degree of
accuracy.
The instrument connects to low voltages using 4 mm
safety connectors on the front, and to mains power
by means of mains connectors on the back.
The instrument measures the following electrical
quantities:
V
Voltage (true RMS value)
U
eff
A
Current (true RMS value)
l
eff
VA
Apparent power
U
eff
·
l
eff
Phase of the current
W
True power (true RMS-værdi)
P
=
U
eff
·
l
eff
·cos(
ϕ
)
Ws
Energy consumption (since last
Reset
)
P·t
Wh
Energy consumption (since last
Reset
)
P·t
Hz
Frequency for AC
Time
Elapsed time (since last
Reset
)
Please note that the two energy ranges (
Ws
and
Wh
)
are reset independently.
The instrument is designed for educational purpo-
ses, and is therefore equipped with a clearly visi-
ble display with 45 mm high digits. The instrument
is electronically protected against overload, and is
equipped with a thermal fuse in connection with
measurements on mains voltage.
Measurement data can be continuously transfer-
red to a computer via a serial interface. Furthermore
data may be logged by the built-in data logger.
User manual watt- & energimeter 4075.55
19.01.11
AC 4075.50
