Electronics FC - Manual (Page 4)

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a. To change the full-scale range of the digital display place the control into the local mode of
operation. (1-7)
b. Turn SETPOINT knob (1-9) on the front panel counter-clockwise to 0%.
c. Push and hold the display switch (1-10) to right. The display should read zero. If it does not
read zero, contact the factory for assistance.
d. Turn the set point knob (1-9) on the front panel full clockwise to 100%.
e. Push and hold the display switch (1-10) to right. Adjust "Display Range-Coarse/Fine" trim
pots (2-8) and (2-9), to achieve the desired full-scale flow rate range for the display to match
the MagnaValve rating.
f. To check the flow accuracy you must perform a catch and weigh test. Run shot through the
MagnaValve for 1 minute and catch it in a container. Weigh the shot. This is the pounds/
minute flow rate. If shot weighs more than the display amount, turn the span trim pot at the
MagnaValve clockwise. If shot weighs less than indicated amount, turn the span trim pot at
the MagnaValve counter-clockwise. Repeat the trial to confirm calibration.
5. OPERATION
Operation consists of controlling shot flow rate through the MagnaValve and transmitting an alarm
signal when flow rate is above or below the desired flow range. The output voltage for the Magna-
Valve is controlled by a servo loop by comparing the set point command to the actual shot flow rate.
a. SETPOINT - To set desired flow rate, turn the set point knob and push Display Switch (1-10)
to the right to read desired set point in the digital display. This will show the set point for either
“Local” or “Remote” modes of operation. Release the Display Switch and the actual flow rate
will again be displayed. The set point may be adjusted during use. It is optional (not neces-
sary) to push the Display Switch to the right while changing the set point during normal opera-
tion.
b. ENABLE - The FC controller can be automatically activated by a 90-115VAC remote "enable"
signal when the mode switch (1-11) is in the "Ready" position (push to the left). The mode
switch can be placed in the "off" position, the "On" position for manual operation, or the
“Ready” position for automatic operation.
c. ALARM - The alarm bandwidth is adjustable from 0 to 50% of full scale and is factory set at
5%. The customer may readjust to another value if desired. The alarm circuit is activated
when the servo is "on" and the control is “Enabled”. When the control is enabled the "Enable"
LED.(1-2) will be lighted). The mid-point of the alarm band automatically follows the set point
setting. The servo switch (1-11) must be on (up) for the alarms to function.
The FC Controller span is factory set to translate the 0-5Vdc MagnaValve signal to 0-10Vdc levels
for the controller. Shot flow rate calibrations should be made at the MagnaValve, not at the
controller.
DO NOT ADJUST THE FC CONTROLLER SPAN. CALL THE FACTORY FOR ASSISTANCE!