AMETEK XHR 1000 Watt Series User Manual
Page 49
Installation
Local and Remote Sensing
49
Use remote sensing during voltage mode operation to shift the power supply’s
regulation point from its output terminals to the load or distribution terminals by
using a separate pair of wires to allow the control circuitry to monitor the load
voltage. This allows the power supply to compensate for voltage losses in the load
lines which would otherwise degrade the regulation of the supply. Line drop is
subtracted from the total voltage available at the output. You can also use remote
sensing to improve load regulation at the front panel binding posts.
To connect remote sense lines:
1. Turn the power supply OFF.
2. Remove the local sense jumper connecting J2 terminal 2 to the positive bus bar
(or positive sense on wire clamp output connector). Remove the local sense
jumper connecting J2 terminal 1 to the negative bus bar (or negative or return
sense on wire clamp output connector).
3. Connect the positive remote sense lead to J2 terminal 2 (positive sense) and the
negative lead to J2 terminal 1 (return sense). Use shielded pair wiring of
24 AWG or larger for remote sense lines. Ensure the mating J2 connector is
plugged securely into the connector at the rear panel. Connect the other ends of
the sense wires to the corresponding sense points at the load.
4. To prevent ground loops, ground the sense line shield, at one point only, to the
power supply's return output connection at the load, to the power supply’s return
output at its output terminal, or to the power supply’s chassis. See
for an example.
5. Turn the power supply ON.
Notes:
•
If you operate the power supply with remote sense lines connected to the load
and with either of the positive or negative load lines not connected, the power
supply shutdown circuit will activate, causing the output voltage and current to
fall to zero.
•
If you operate the power supply without remote sense lines or local sense
jumpers in place, the supply will continue to function, but supply regulation will
be degraded and/or erratic, or the OVP circuit may activate.