Omega Engineering PSP - Manual (Page 2)

OPERATING INSTRUCTIONS
INPUT VOLTAGE: AC input models operate on 105-125 VAC, 47-420 Hz.
(Models with an input of 210-250 VAC, 47420 Hz are available on special
order).
OUTPUT VOLTAGE ADJUSTMENT: Output(s) factory set to within +1% of
the nominal output voltage rating. (AC input models having outputs of I to 9
volts, within 2%.) If necessary, outputs can be more precisely calibrated by
the use of an external trim resistor connected between the T/C pin and one
of the output pins. With certain units, connecting the resistor from the T/C pin
to the (+) output pin increases voltage, and connecting to the (-) output pin
decreases it; with other units, the reverse applies. Begin trimming with
approximately 1 megohm resistance, and decrease resistance until
calibration is attained. Do not use a resistance value of less than 20 K.
Trimming the output to a voltage other than the nominal rating may
adversely affect performance and may result in damaging the supply.
SHORT CIRCUIT PROTECTION: All OMEGA miniaturized power supplies
are of rugged construction and designed to withstand substantial overloads
or short circuits for reasonable lengths of time. Prolonged operation under
overloaded or shorted conditions is not recommended.