Power
The i nstrument wi l l ope rate from either 1 1 5 or 230 volts ac, 50-500 H z .
Converstion for l ine vo l tage i s performed with a s l i de swi tch mounted on the
rear pane l (see Figure 2-1 ) . The un it i s shipped w i th the �wi tch set for 1 1 5 vol ts.
To change the setting, insert a sma l l -bl ade screwdrive r i n the switch slot and
move switch to expese 1 1 5 for 1 1 5 Vac operation, or 230 for 230 Vac operation .
The instrument is shi pped with a 1 /4-am p slow-bl ow fuse for 1 1 5 -volt or 230-vo l t
o peration .
WAR N I N G
I n keeping with standard safety practice, the case of the
i nstrument is grounded through the pewer cord . I f the
i nstrument must be connected to a two-wire receptacle,
use a perol l e l -ground adapter and connect the short l ead
to ground .
2-4.
CONTROLS A N D I ND ICATORS
Control s and indi cators are shown in F igure 2-1 a nd described i n Table 2-1 .
The descriptions i n Tabl e 2-1 and the fol lowing peragraphs ore not intended to
be complete operating i nstruations, but onl y genera l i n formation applying to
a l l modes of operation . Paragraphs 2 -5 , through 2-10 describe filter settings,
i nterconnection, and typical operating procedures .
NUMBER
2
3
Tabl e 2-1 . Control s and I nd i cators
D ESCRIPTION
On Switch: The switch is moved to the on
position to supp l y pewer to the i nstrument
Control s and Indicators numbered 2 through 1 1
pertain to Channel l :
First sign i ficant digit of Cutoff Frequency
setting , 0 - 1 0 pesitions, contin uous rotation
A l ight-€mitting d i ode (LED) i ndi cates that
power is on and a lso serves as a decimal pei nt
indicator for the Cutoff Frequency setting
2-3
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