Electronic Wattmeter
Chapter 2
Power for a given
voltage range (Watts)
Current
Range
0.05
0.1
0.2
0.5
1
2
5
10
Working voltage limits
2.5 Connection
of
EW604
to Circuit under
Test
5
10
20
50
100
200
500
1000
0.25
0.5
1.0 2.5
5
10 25 50
0.5
1.0
2
5
10
20
50
100
1.0
2
4
10 20
40
100
200
2.5
5
10 25
50
100 250 500
5
10 20 50 100
200
500
1k
10 20
40 100
200
400
1k 2k
25
50
100 250 500
1k 2.5k 5k
50 100
200 500
1k
2k
5k
10k
Fig 2.1
It is recommended that the lower front panel 'COMMON'
terminals are operated
at
'neutral' potential and
in
no
case
at
a
potential exceeding
400V d.c
or
peak, and the upper terminals
at
no
more than 1500V d.c or peak, with respect to the normal
supply ground (green/yellow wire
in
the supply cable to the rear
of
the EW604).
The EW604 terminals
are
arranged
so
that two terminals can
be
connected to the supply and a separate two to the load
as
in
fig
2.2.
Live
Supply
Neutral
Fig 2.2
1 2
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