AMETEK Ls Series - Manual (Page 70)

User Manual Lx / Ls Series
66
ENTRY DESCRIPTION
ALC STATE Sets the Auto Level Control (ALC) mode. This mode uses the
internal measurement system to zero regulate the output. There are
three modes of operation:
OFF No measurement based output regulation.
REG Output regulation is enabled. AC source will continuously
regulate output but will not trip off output. (Note: This mode
requires firmware revision 0.98 or higher).
ON Output regulation is enabled and output will fault (trip off)
with Error 801 “Output Voltage fault” if regulation cannot be
maintained and the programmed output voltage is 10Vrms or
higher. No error is generated for settings below 10 volt.
In most situations, the ALC mode should be set to REG or ON for
optimal performance.
Note: The ALC mode only functions for programmed output voltages
above 5 Vrms.
VOLT REF Selects internal or external voltage programming. Select INT for
programming of voltage from the front panel or over the bus. Select
EXT to use the RPV (remote programming voltage). The RPV input
expects a 0-10 Vdc signal for 0 to full-scale voltage.
IMP STATE Sets output impedance mode. Available settings are:
OFF The output impedance is at its minimum possible
value and the source zero-regulates.
ON The output impedance is maintained at the set level
by reducing the output voltage as a function of the
load current as needed.
LEVEL This field is only valid is the IMP STATE is set to ON. It sets the
desired output impedance level. The available range is a function of
the voltage and current ranges of the AC source.
NO OUTP Selects SINGLE or THREE phase mode of operation. In SINGLE
phase mode, all current is delivered to the ø1 and COM terminals of
the OUTPUT terminal block.
Note that even in SINGLE phase mode, a voltage is present at ø2
and ø3 terminals. Connect only a single phase load when operating
in single phase mode.