Chamberlain LiftMaster 835LM Instructions d'utilisation
1
The Perimeter Alert uses a Passive Infra-Red (PIR) Motion Sensor to detect movement of people and vehicles, while allowing small
animals to pass through undetected. The Base Station is powered by the AC adapter and the 4 AA batteries supply power in case of a
power outage.
NOTE: The Base Station is intended for indoor use only.
Model 835LM
PERIMETER ALERT
Base Station Passive Infra-Red (PIR)
Motion Sensor
Swivel Bushing
Rubber Pads
Batteries: If the AC adapter is not connected, the
AA batteries in the Base Station should last up to one week.
If the Base Station batteries are low, the Base Station will
beep every 30 minutes. The AA batteries in the PIR Motion
Sensor will last up to 2 years depending on use (lithium
batteries are recommended for colder environments). If
the PIR Motion Sensor batteries are low, the Base Station
will beep every 30 minutes until the batteries are replaced.
The PIR Motion Sensor will continue to operate with a
low battery, however the light will not illuminate. For peak
performance, inspect batteries annually and replace as
needed.
Programming Additional PIR Motion Sensors: The Base
Station can learn the code of up to 7 additional PIR Motion
Sensors, responding with unique buzzes. To program
additional PIR Motion Sensors see Step 4.
To order additional PIR Motion Sensors call
1-800-528-9131.
Clear Memory: Press and hold the Learn Button on the Base
Station until 3 beeps are heard.
On/Off: To turn the Base Station on and off, hold down the
power button until you hear the on/off tone.
Volume: The Base Station is equipped with adjustable
volume controls. The lowest volume setting is the mute
feature.
Carton Inventory
Antenna
On/Off Button
Volume
BASE STATION
Operation & Features
Overview
Mounting Plate AC AdapterSun/Rain Shield
2
Antenna
ON
OFF
12
SWITCH SETTINGS
Switch #1
Switch #2
Learn
Button
OFF Low Sensitivity
ON High Sensitivity (Default)
OFF 15 Feet Detection Range
ON 30 Feet Detection Range
(Default)
NOTE: To avoid unwanted detection of small animals move
Switch #2 to OFF.
Assembly & Programming
Attach PIR Motion Sensor box
to mounting plate with large
silver screw. Tighten screw
until PIR Motion Sensor stays
in place when repositioned.
Install 4 AA Alkaline
batteries. (Lithium batteries
recommended for colder
environments.)
LED light will flash.
Plug in the Base Station.
Adhere rubber pads to the
bottom of the base.
4 AA batteries are optional in
case of a power failure. OPTIONAL
AC Adapter Input
AEnsure Base Station and PIR
Motion Sensor are in close
proximity to each other.
Press and release Learn
Button on Base Station.
Buzzer will sound.
BWithin 60 seconds, press the
Learn Button on the inside of
the PIR Motion Sensor. LED
light will illuminate and Base
Station will buzz.
Learn Button
1
2
PIR Motion Sensor
SWITCH #1:
SWITCH #2:
3
4Learn Button
Insert battery pack facing away
from circuit board and fasten
cover with the smallest screws
(provided).
NOTE: Ensure the batteries do
not touch the circuit board and
the antenna and battery wires
are not pinched.
5
6
PIR MOTION SENSOR INSTALLATION
Mount PIR Motion Sensor
horizontally on solid surface
a few feet off the ground and
within 1/2 mile of Base Station
(rotate sensor to access screw
holes). Unit should be able to
swivel as needed.
Attach sun/rain shield.
NOTE: Keep PIR Motion
Sensor antenna away from
metal objects. Do not mount
PIR Motion Sensor in direct
sunlight, near moving tree
branches, or in the path of a
sprinkler system.
3' - 5'
10' - 20'
Vehicle Alert Installation: For cars, the best mounting
position is about 4 feet high, between 10-20 feet back, and
angled to see the back of car after passing the sensor.
7
Test PIR Motion Sensor by
waving hand in front of sensor.
LED light should flash and
the Base Station will buzz X
number of times indicating
which sensor has been
activated.
3
Troubleshooting
The PIR Motion Sensor lights up, but the Base Station does
not respond.
The PIR Motion Sensor must be programmed to Base Station
(See Step 4). Ensure Base Station is on and the volume is
turned up.
PIR Motion Sensor is detecting motion only part of the time.
Ensure the PIR Motion Sensor is set to the High Sensitivity
setting (See Step 2). To detect cars, it is best to mount PIR
Motion Sensor at height of car’s motor and have it between ten
and twenty feet from the road. Swivel sensor as needed.
The Alert is giving false alarms.
Check for moving tree branches or insects in sensor window.
PIR Motion Sensor can also be triggered by light shining
directly in sensor window, such as reflected sunlight, or motion
in front of a light source.
It is possible that condensation has built up on the sensor. Wipe
condensation from PIR Motion Sensor with cotton swab. Let it
sit inside for a few hours, open to the air, without the batteries
and it should correct itself.
Check Sensor Switches on PIR Motion Sensor. See Switch
Settings.
Base Station beeps every 30 minutes.
The batteries in the Base Station or the PIR Motion Sensor(s)
are low. Replace the 4 AA batteries. Check the PIR Motion
Sensor(s), if the LED illuminates on all of the PIR Motion
Sensors, change the batteries in the Base Station.
The Alert is not getting expected transmission range.
Keep both antennas vertical and keep PIR Motion Sensor
antenna away from trees and metal objects. Ensure Base Station
is in clearest possible sight of the PIR Motion Sensor. The less
objects between the devices, the longer the range.
NOTE: The manufacturer is not responsible for any radio or
TV interference caused by unauthorized modifications to this
equipment. Changes or modifications not expressly approved
by the manufacturer could void the user’s authority to operate
the equipment.
FOR TECHNICAL SUPPORT DIAL OUR TOLL FREE NUMBER:
1-800-528-9131
www.liftmaster.com
NOTICE: To comply with FCC and or Industry Canada rules (IC), adjustment or modifications of this
receiver and/or transmitter are prohibited, except for changing the code setting or replacing the
battery. THERE ARE NO OTHER USER SERVICEABLE PARTS.
Tested to Comply with FCC Standards FOR HOME OR OFFICE USE. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operation.
© 2010, The Chamberlain Group Inc.
114A4079B All Rights Reserved
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