Chamberlain Swing GATE - Manual (Page 15)

14 of 53 Doc 6001242 (01-20273) Rev C
I. GATE SENSITIVITY ADJUSTMENTS
The gate operator monitors both average and peak motor current. When the gate encounters an
obstruction, the gate operator senses the change in motor current and stops or reverses the gate.
Three sensitivity adjustments must be set in the field:
• Right gate motion (R78)
• Left gate motion (R81)
• Inrush current (R119)
NOTES: The Overload adjustment (R71) is factory set. Do not adjust.
Current flow varies with temperature. Do not tune the sensitivity measurements too
finely, or they may change with the time of day or seasons.
For swing gate operation, controls are Right/Clockwise and Left/Counterclockwise.
♦ If your installation requires setting switch S2 the “Open to Right” position, use the “Open to
Right" adjustment procedures below. If your installation requires setting S2 to the “Open to
Left” position, use the “Open to Left" adjustments following the "Open to Right" procedures.
♦ The minimum sensitivity is full clockwise and maximum sensitivity is full counter clockwise.
These adjustments must be made while the gate is in motion.
♦ Before starting the adjustments, verify that the Overload pot is set to 3:00 o'clock, the Left and
Right reverse pots are set fully clockwise, and the Inrush pot is set to the 11 o’clock position
(see Figure 9).
♦ Make all adjustments in the order listed.
Figure 9. Gate Sensitivity Adjustments Location.
1. LEFT GATE (CLOCKWISE OPEN) ADJUSTMENTS
"Right Reverse" Adjustment (R78)
1. Initiate opening the gate.
2. Wait 4 to 5 seconds, then lightly "tug"against the edge of the gate to simulate an obstacle.
3. If the gate does not stop, reclose the gate and adjust the pot slightly counterclockwise.
4. Repeat steps 1-3 until the gate stops when tugged and has the desired sensitivity.
"Left Reverse" Adjustment (R81)
1. Open the gate fully, then initiate closing the gate.
2. Wait 4 to 5 seconds, then lightly "bump" the leading edge of the gate to simulate an obstacle.
3. If the gate does not stop or back up, reopen the gate and adjust the pot slightly
counterclockwise.
4. Repeat steps 1-3 until the gate stops or backs up when bumped and has the desired sensitivity.