Electronics AC - Manual (Page 6)

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b. Set the servo switch (2-11) to the off (down) position.
c. Turn the motor off.
d. Turn the “setpoint” knob on the front panel full clockwise. Push and hold the “display
switch” to right. Adjust "display range coarse/fine" trimpots (2-8) and (2-9) to set the dis-
play to equal the current transformer amp rating (not motor full load amps).
e. Rotate the setpoint knob fully counterclockwise. Start the motor.
f. Start the valve (apply Enable signal-or use on/off/ready mode switch (1-11) on front).
g. Slowly turn setpoint knob clockwise until desired motor current is achieved.
h. NOTE: The factory calibration of the input span should not need any adjustment. Verify
that the wire size is adequate in the 5-amp loop of the current transformer secondary. It
should be a minimum of 16 AWG for short runs of 5 feet or less. Longer runs should use
14 AWG or 12 AWG. If the digital amps display is compared to a clamp-on type ammeter
and is accurate at the low amps but not at higher operating amps, then the 5-amp loop
wire is too small. Use a larger gage wire or re-locate the current shunt from the rear termi-
nal strip closer to the current transformer and connect the shunt to the AC controller using
18 AWG or larger shield cable.
i. If the digital amps display reading is unstable, then a system problem exists. Do not make
any servo adjustments (the servo is off) until the cause of unstable operation in manual
mode is corrected. See Trouble-Shooting Section XIII.
j. Turn Enable off.
k. Place servo switch (2-11) on.
l. Push display switch to right and adjust setpoint to typical motor amps.
m. Enable the control and note the motor amps response time and stability. If the response
time is too fast (unstable) or too slow (sluggish), refer to Section 5 for stability adjustment.
8. SPARE PARTS LIST
There are no spare parts recommended for the AC controller. Contact the factory for assistance.
9. WARRANTY
Electronics Incorporated warrants this product to be free from defect in material and workman-
ship for a period of two years from date of original shipment. Defective units must be returned to
Electronics Incorporated with shipping costs prepaid. Electronics Incorporated will repair or re-
place defective unit at its option. No consequential liability is assumed. No other warranty, includ-
ing merchantability or fitness for purpose, applies or is expressed or implied.
Warranty work is only available at the factory. On-site service or start-up assistance is available
at extra cost to customer.