5. CHANGING SETTINGS
IM 2493AAA-1
11
The POWER SERIES
Plus
has the option of analog output, which can provide an
analog signal relative to the input of the meter. The relationship between the
input and the output can be scaled by the user using the front panel. Analog
Output 1 is always proportional to the value shown on the first (top) display.
Output 2 is always proportional to the middle display, and Output 3 will always be
proportional to the bottom display.
A 5 Amp ammeter with 0 to 1 milliamp output,
for example, has the following default settings:
CT ratio: 1 to 1
Analog Output LO: 0 Amps
Analog Output HI: 5 Amps
The LO is the input value at which the output
will be 0 mA. The HI is the input value at which
the output will be 1 mA. The charts at right
show the relationship of input and output.
When the settings are changed to:
CT ratio: 1 to 1
LO: 1 Amp
HI: 4 Amps
The new relationship of input and output is shown
at right.
Next the CT ratio is changed to 2 to 1 (2:1).
Note that the HI and LO automatically change to
match the new ratio whenever the CT ratio is
changed. So now the settings are
CT ratio: 2 to 1
LO: 2 Amps
HI: 8 Amps
And the relationship is shown at right.
0
1.25
2.5
3.75
5
0
0.25
0.5
0.75
1
DC Current Out (mA)
0
2.5
5
7.5
10
0
0.25
0.5
0.75
1
DC Current Out (mA)
0
1.25
2.5
3.75
5
0
0.25
0.5
0.75
1
DC Current Out (mA)
