Range-to-range Accuracy
Reference Point Power
10kW
1kW
~
Q)
~
100W
0..
DC
Carrying Handle
Power Requirements
Fuse
Electronic Wattmeter
Chapter 1
Errors in the current and voltage range multipliers contribute a
combined error to power indication that is
typically less than
1%
of reading (guaranteed less than 2.3% of reading).
This is at full-scale
on
the 1
OOV
and 0.5A range and is set
to
within 0.3% of 50W.
Note
1)
In
general, scale errors are not affected by choice of
range.
2)
Typical figures are determined from measurements
made
on
a single batch of instruments.
3)
Guaranteed figures
are
from measurements made
on
every instrument.
Fig 1.2 shows the area of operation within which the EW604
may
be
expected to give results accurate to better than ±5% of
fsd and should
be
interpreted
in
conjunction with the accuracy
figures given for the calibration frequency of
50Hz.
Area of operation
10
50
100
1k
10k 20k
Calibration Frequency
Frequency
Hz----e.
Fig 1.2
A dual purpose handle is fitted for
use
in
carrying the instrument
or serving
as
a stable stand to present the instrument panel
at
a
convenient working angle.
Line voltage
200/250V or 1 00/125V rms
50
or 60Hz
Consumption
4
V.A.
315mA slow blow (200mm x 5mm) Littelfuse style 213
Beswick TTC123, Buss GMA
8
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