Usin
your Pro
rammable Power Supply 5 - 11
Local sensin
mode:
Local sensin
is used when the volta
e across the load does not need to
compensate for the volta
e drop across the load leads. This may be the case
when the followin
conditions exist:
• Short wires between the output channel and the load (R
load
>
R
lead
).
• Low current throu
h the connected load.
Remote sensin
mode:
Remote sensin
is used if the volta
e accross the load must exactly match the
pro
rammed value; remote sensin
will namely compensate for the volta
e drop
accross the load leads. This mode will be useful when the followin
conditions exist:
• Lon
leads between the output channel and the load (R
load
≤
R
lead
).
• Hi
h current throu
h the connected load.
Note that with remote sensin
, the readback of the load volta
e is monitored at
the load terminals. When usin
the remote sensin
mode, it is necessary to twist
the sense wires to avoid disturbance and noise pickup in the sense input
terminals, which mi
ht cause instability of the output.
Durin
remote sensin
, the power supply can compensate for volta
e drops up to
a specified minimum value. This is called the remote sense capability (see the
Reference Manual, Appendix A). When the volta
e drop exceeds this value,
sense FAIL may occur. The output volta
e and current are then reduced to zero
and the display shows the FAIL messa
e.
+S
+V
V
S
R
load
ST5837
Fi
ure 5.5.5 Connection of a Load in the Local Sense Mode
+S
+V
V
S
R
load
ST5847
Fi
ure 5.5.6 Connection of a Load in the Remote Sense Mode
