AMETEK CW-M - Manual (Page 30)

Elgar CW-M Series
3-14 M161570-01
3.7 SENSE CONNECTIONS
The CW Series unit can be used with or without remote sense leads
connected to the load. Where the sense leads (line and neutral sense) are
connected determines the point at which the CW output voltage will be
precisely regulated.
As shipped, the units are configured for local sense operation. This is
achieved by connecting shorting jumpers between the sense and AC
output terminals of the rear panel output terminal block, as shown in Figure
3-8.
When using remote sensing, the shorting jumpers must be removed, and
the remote sense leads connected from the CW sense terminals to the
load. The point of voltage regulation will now be at the load, and any
voltage drop across the interconnecting output cable will be compensated.
In the event that the external remote sense circuit opens, the CW
maintains control of the output voltage by utilizing a redundant sense
circuit.
This redundant circuit is comprised of 10kΩ resistors internally
connected from the AC output terminals to the voltage control circuitry.
However, since the unit is calibrated with the sense leads connected, this
mode of operation will incur reduced accuracy in the AC output voltage
because of the presence of the 10kΩ resistors.
Figure 3-8. Output Voltage Sensing Configuration