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3.5 Reverse Sensitivity Adjustment
This vehicular gate operator is equipped with an inherent (Type A) entrapment sensing system. This
system will sense an obstruction in either the opening or closing gate cycles and will cause the gate
to reverse direction should an obstruction be encountered. For this system to function correctly,
the gate must be properly installed and work freely in both directions. A good set of ball
bearing wheels (or rollers) is essential for proper slide gate operation.
1. Activate the gate operator by momentarily shorting terminal 1 and 4 with a 1-foot piece of
18 AWG wire. Be sure that the limit adjustment has been completed as described in
section 3.3.
2. While the gate is running open, slowly rotate the open reverse sensitivity potentiometer
clockwise until the gate reverses travel, then rotate the potentiometer 1/8 turn counter
clockwise. Note: Rotating the sensitivity adjustment clockwise INCREASES the reverse
sensitivity. Rotating this adjustment counter-clockwise DECREASES the reverse
sensitivity. NOTE: After the gate has reversed, the operator will assume a "soft
shutdown" making it necessary to initiate the cycle again by momentarily shorting across
terminals 1 and 4 as in step 1.
3. While the gate is running closed, slowly rotate the close
reverse sensitivity potentiometer clockwise until the gate
reverses travel, then rotate the potentiometer 1/8 turn
counter clockwise. Note: Rotating the sensitivity
adjustment clockwise INCREASES the reverse sensitivity.
Rotating this adjustment counter-clockwise DECREASES
the reverse sensitivity. NOTE: After the gate has
reversed, the operator will assume a "soft shutdown"
making it necessary to initiate the cycle again by
momentarily shorting across terminals 1 and 4 as in step 1
4. Operate the gate a few times to be sure that it cycles
completely.
5. Place an immobile object along the path of the gate so that
the gate will strike it while in the open cycle. The gate must
reverse direction after striking the object. If it does not, increase the reverse sensitivity by
turning the potentiometer 1/8 turn clockwise, then repeat this test. NOTE: After the gate
has reversed, the operator will assume a "soft shutdown" making it necessary to initiate
the cycle again by momentarily shorting across terminals 1 and 4 as in step 1.
REVERSE SENSOR
MIN MAX
MIN MAX
CLOSE OPEN
6. Place an immobile object along the path of the gate so that the gate will strike it while in
the close cycle. The gate must reverse direction after striking the object. If it does not,
increase the reverse sensitivity by turning the potentiometer 1/8 turn clockwise, then
repeat this test. NOTE: After the gate has reversed, the operator will assume a "soft
shutdown" making it necessary to initiate the cycle again by momentarily shorting across
terminals 1 and 4 as in step 1 to reactivate the automatic close timer.
7. You may have to repeat step 2 several times to find the correct sensitivity adjustment.
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