Front Panel Controls

VOLTAGE CENTER OF BAND: The center of the control band may be set to any voltage from 105 to

135 Vac. The scale calibration accuracy is ± 0.5 V at 120 Vac.

TOTAL BANDWIDTH: The bandwidth control can be adjusted from 1.0 to 6.0 V. The scale calibration

accuracy is ± 0.3 V.

TIME: The timer is adjustable from 0 to 120 seconds, with a scale calibration accuracy of ± 10% of setting or

± 2 seconds, whichever is greater. The timer starts when the voltage goes outside the band and resets within

a few milliseconds upon return to the band or when reset by an external contact in the Non-Sequential mode.

LINE DROP COMPENSATOR: The resistance compensation provides 24 V compensation for 0.2 A input in

phase with the input voltage. The reactance compensation provides 24 V compensation for 0.2 amps input

at a phase angle of ± 90° as chosen by the DIRECT/REVERSE switch. The magnitude and angle of each

circuit is individually set by a pair of trimpots to any accuracy limited only by the instruments used in setting.

The factory setting of magnitude will be within ± 5% and the phase angles within ± 2%. The voltage and two

current circuits are isolated from each other and do not interact.

TEST/OPERATE: When this switch is in the TEST position, the Line Drop Compensator is deactivated and

the voltage may be raised and lowered by means of an uncalibrated voltage control. An external voltmeter

with a burden of 500 Ω per V or higher can be connected to test the band limits by observing when the

RAISE and LOWER LEDs light. No special test voltage source required.