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TABLE 2-1
FUNCTION OF CONTROLS AND INDICATORS
EQUIPMENT/ITEM
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Transfer Func-
tiobTRFUNC
®
CONTROL/INDICATOR
FUNCTION
(Fig. 2-2)
Supplies ±20VDC for regulator and
±20VDC Power Supply
sensor power.
Fused inputs FUAl
Card (no adjustments) and 2.
"Coordination" Card
Provides input signal amplifica-
tion, motor response, and
stability adjustments and the
oscillator circuit.
"Stability" Adjust
Potentiometer
"Range" Adjust
Potentiometer
"Response" Adjust
Potentiometer
Provides a means of fine tuning
the response of the motor to
eliminate speed variations.
Provides a means of electrically
center~ng
sensor pickoff arm
to provide balanced range.
Provides a means of setting the
system sensitivity to control the
motor response time to
a
pressure
change.
"Driver Coordination' Provides signal amplification and
Card
current limit circuit with
adjustments.
"Current Limit"
Adjust Potentiometer
"Zero Adj"
Potentiometer
"Gate Pulse
Generator" Cards
(Fig. 2-3)
Balance Pot
P322
2-5
Provides an adjustment range for
overcurrent protection for the
SCR's (normally set at
130%).
Provides a means of min1m1zing
the output with no input applied.
Provides the pulse trains to the
SCR modules in the proper time
sequence and phase for firing
the SeR's causing the right
amount of voltage at the motor
to increase or decrease the
motor torque.
Provides a means
of
adjusting
the point where the constant
speed motor comes on.
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