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LockMaster LM902 - Page 19

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18
Without a properly installed safety reversal system, person (particularly small children) could be SERIOUSLY
INJURED or KILLED by a closing gate.
*Too much force on gate will interfere with proper operation of safety reversal system.
*NEVER increase force beyond minimum amount required to close gate.
*NEVER use force adjustments to compensate for a binding or sticking gate.
* If one control (force or travel limits) is adjusted, the other control may also need adjustment.
* After ANY adjustments are made, the safety reversal system MUST be tested. Gate MUST BE TESTED. Gate
MUST reverse on contact with a rigid object.
The opener is equipped a with an obstruction sensing feature. If the gate encounters an obstruction the opener
will automatically reverse direction and stop. Based on the length and weight of the gate it may be necessary to
make force adjustments. The force adjustment should be high enough that small objects such as branches or
wind will not cause nuisance interruptions but low enough to prevent serious injury to a person or a vehicle.
3. Master/Slave Gate Set
When Digital Display indicates P2”, the gate opener is on the Master/Slave Gate Setting. Press the
“INC” and “DEC” Buttons respectively to follow modes:
01 shown in Digital Display, which means Gate Opener 1 (right-hand side) as Master one
10 shown in Digital Display, which means Gate Opener 2 (left-hand side) as Master one
Press the FUNC button to store the data when the master/slave gate is chosen. The Digital Display will
indicate P3. Now Master/Slave Gate Set is finished. (factory set is 01)
4. Set the Open Interval Set between Master and Slave Gate
When the Digital Display indicates P3, the gate opener is on the Open Interval between Master/Slave
Gate Setting.
The open interval can be adjusted by pressing the “INC and “DEC” Buttons respectively. The Digital
Display will show 0-9, which indicates the interval time0 is the Master and Slave gates open
simultaneously. 1 means the Master Gate starts to open 1 second before Slave gate. Maximum start
time is 9 second. Each time you press and release the INC button, the figure increases by 1, and the
Master gate starts to open 1 more second earlier. Each time you press and release the DEC Button,
the figure decreases by 1, and the start time decreases 1 second.
(Factory set is 3 seconds)
Press the FUNC button to store the data when the open interval is set. The Digital Display will indicate
P4. Now Open Interval Set is finished.
5. Set the Close Interval between Master and Slave Gate
When the Digital Display indicates P4, the gate opener is on the Close Interval between Master/Slave
Gate Setting.
The Close Interval can be adjusted by pressing the “INC” and “DEC” Buttons respectively. The Digital
Display will show 0-9, which indicates the interval time 0 is the Master and Slave gates open
simultaneously. 1 means the Slave Gate starts to close 1 second before Master gate. Maximum start
time is 9 second. Each time you press and release the INC button, the figure increases by 1, and the
Slave gate starts to close 1 more second earlier. Each time you press and release the DEC Button, the
figure decreases by 1, and the start time decreases 1 second.
(Factory set is 3 seconds)
Press the FUNC button to store the data when the Close Interval is set. The Digital Display will indicate
P5. Now Close Interval Set is finished.
6. Adjust the Obstruction Sensitivity/Stall Force
When the Digital Display indicates P5, the gate opener is on the Stall Force Adjustment.

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