2 Installation
32 Series E4360 User’s Guide
Because the sense leads are also part of the unit's feedback path, keep
the resistance of the sense leads low to obtain the best performance.
The additional load regulation due to resistance in the sense leads is
given by the formula:
Regulation in millivolts =
(total load lead drop) * (total sense lead resistance)
where K = 3 for E4361A; 7 for E4362A
Over-voltage Protection
Because the over-voltage protection (OVP) circuit senses the voltage at
the output terminals and not at the sense terminals, the voltage sensed
by the OVP circuit will be
higher than the voltage being maintained at
the load when remote sensing. Therefore, you must program the OVP
high enough to compensate for the expected voltage drop between the
output and the load.
Output Rating
With remote sensing, any voltage dropped in the load leads causes the
unit to increase the voltage at the output terminals so it can maintain the
proper voltage at the load. If you attempt to operate at the full-rated
output at the load, this may force the voltage at the output terminals to
exceed the unit's rated output.
This will not damage the unit, but may trip the OVP circuit, which senses
the voltage at the output. When operated beyond its rated output, the
unit's performance specifications are not guaranteed, although typical
performance may be good. If the excessive demand on the unit forces it
to lose regulation, the
Unr annunciator will indicate that the output is
unregulated.
Always check that the voltage at the load when added to the voltage
drop in the load leads does not exceed the voltage rating of the SAS.
Stability
In SAS and Ta ble modes, the unit is stable with constant current,
constant resistance, constant voltage, and any capacitive loads.
Inductive loads should be kept less than 200µH.
In Fixed mode, the unit is stable if the output capacitance is less than
2000µF.
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