Download Tech Note CW Series Sense Leads Usage

Tech Note
CW Series Sense Leads Usage
CW Series AC Power Sources
Remote/Local Sense Operation
The CW Series AC Power Source 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 1.
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
reasonable 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, the presence of the 10kΩ resistors reduces accuracy in the AC output voltage in this
mode of operation.
Rear Panel Output
Terminal Block
Connections
Line Sense
To Voltage
Control Circuitry
10k
Line Output
Shorting Jumpers
Neutral Output
10k
To Voltage
Control Circuitry
Neutral Sense
Figure 1 Output Voltage Sensing Configuration
AMETEK Programmable Power
9250 Brown Deer Road
San Diego, CA USA 92121-2267
Web : www.programmablepower.com
Phone : 858.458.0223
Email : [email protected]
Email : [email protected]