Lencore LP-2 Assembly instructions

INSTALLATION &
PROGRAMMING
MANUAL
PROGRAMMABLE TIMER
(MODEL LP-2)

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Copyright ©Lencore Acoustics Corp.
All rights reserved.
April 2000
C
CO ON NT TE EN NT TS S
Introduction 3
Display 3
Keyboard 4
Installation 4
SetUp 4
Connecting the blue and black zone wires 4
Connecting the wall transformer 4
Connecting the battery 4
Battery Switch (S1) & Test/Normal Switch 5
Zone slide controls 5
Programming 6
Settingdateandyear 6
Settingtimeofday 6
Daylightsavings 6
Look at masking attenuation levels 6
Change masking attenuation levels 6
LookatminutesperdB 7
ChangeminutesperdB 7
Copy day of week to next day 7
Copy Zone 1 to Zone 2 (entire week) 8
Look at acclimate status 8
Turnon/offacclimate 8
Change acclimate dB's / days per dB 8
Acclimate help screen 9
Minutes per dB help screen 9
Leapyears 10
Daylight savings occurrences 10
Resetbutton 10
Initial default values 10
Default attenuation values after a reset 10
Default minutes per dB values after a reset 11
Other default values after a reset 12
Specifications 12
Timer record sheets 13/14

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Notes 15
Menu flow chart 16
INTRODUCTION
The Lencore Model LP-2 Programmable Timer is a two zone electronic attenuator
when attached to the blue and black wires of model LM-6 master sound masking
units. Raising of masking levels is simulated only. That is, the highest level of sound
masking is the same as if the timer were not attached to the blue and black wires
of the masters.
There are three separate areas of attenuation. Each hour of the 24 hours in a day
has a programmed attenuation value in the range of 0 dB to -9 dB inclusive. The
zoneslidecontrolshave anattenuation rangeof-5dB to +5dB inclusive. Finallythe
acclimation setting has a programmed attenuation range of -1 dB to -9 dB
inclusive. If acclimation is turned off or has timed out, attenuation is 0 dB.
The total attenuation that is displayed, and output to each zone, is the sum of the
dB setting for the current hour of the day**, plus the zone slide control dB setting,
plusthe acclimation dbsetting. Notethat the maximum total attenuation possible
is -18 dB even if the programming gives a result beyond this.
**Pleasetakeintoaccountthe minutesperdBsettingforthisparticularhour
to determine at what minute final attenuation is reached. This applies only if
the previous hour setting is different from the current hour.
The two zones can be programmed independently except the acclimation dB's
that are common to both. Each day of the week can be programmed differently
also.ForexampleSaturday and Sunday canbeprogrammeddifferent fromFriday.
Fromthe menu driven screens onthe display you canselect the zone,theday,the
hour and enter the amount of attenuation desired. Often the default attenuation
settings are adequatefor mostoffice situations andno programmingis necessary.
There are approximately 35 different screens or menus that can be displayed. You
canfollowthe flow ofthesescreensin themenuflowchartprovided.Oncefinished
youshouldalways return tothe mainscreen,theone that shows the date,timeand
zone dB values.
DISPLAY
Theliquid crystal display (LCD)has 4 linesof20characters each. In the mainscreen
line 1 shows the date. Line 2 shows the day of week, time of day, the letter A for
A.M. or P for P.M.

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On line 3, Z1 refers to Zone 1, Z2 refers to Zone 2. The current values in dB's are
shown for each zone. These values are referenced to an office masking level of 47
dB.That is,areading of "Z1=0dB"and"Z2=0dB"on the timer display,means an office
masking level of 47db for both zones. This reading assumes that all the LM-6 master
units havebeen adjustedas per the installation section in this manual.Forexample,
a reading of "Z1=+2dB" and "Z2=-2dB" on thetimerdisplay means anoffice masking
level of 49 dB for Zone 1 and 45 dB for Zone 2.
Line 4 usually displays a prompt line. It shows what keys should be pressed to
perform a certain task. In the date and time screen, which is the main screen, it will
display "Press 0 for Menu". After pressing 0 on the keyboard the display will change
and will prompt you with further choices.
KEYBOARD
The keyboard is similar to that used on a touch-tone telephone. The "#" key can
often be used to advance without changing a value (i.e., keep the current value).
The "*" key when pressed will exit some menus immediately. However, it is not a
cancel key. Any changes made before pressing the "*" key will be kept.
INSTALLATION
SET UP
We suggest you hang the timer panel box prior to activating the Programmable
Timer.
Mount the timer enclosure securely on a wall at eye level near a 120 volt A.C.
socket. Open enclosure door and remove the keys taped to the inside left panel.
Use these keys to lock the timer box once all settings have been adjusted.
Now note the locations of Zone 1 output, Zone 2 output, 24-volt AC input and
battery fuse holder.Thefollowing steps,in theordergiven,are recommendedfora
two-zone hookup.
1. Bring the blue and blackwires fromZone 1 throughtheholein theenclosure.
Strip ¼ inch of insulation from both wires. Insert the black wire into P.C. Board
terminal marked Com1. Insert the blue wire into P.C. Board terminal marked
Zone1. Tighten the screws on the terminal so the wires are secured.
2. Bring the blue and blackwires fromZone 2 throughtheholein theenclosure.
Strip ¼ inch of insulation from both wires. Insert the black wire into P.C. Board
terminal marked Com2. Insert the blue wire into P.C. Board terminal marked
Zone2. Tighten the screws on the terminal so the wires are secured.
Never connect the blue wires from Zone 1 to Zone 2 together. This includes the "home runs".

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Thetwozonesmustremainseparate.Ifthereisonlyonezonetoconnectto thetimer,leave
Zone 2 unconnected. This is very important.
3. a) A 5-foot green wire is provided to attach the Timer Box to an earth
ground. Bring
this wire through the hole in the enclosure, strip ¼ inch of insulation and
attach to
a convenient earth ground.
b) Remove the 24-volt wall transformer from the bottom right section of the
panel box andfeed thecable through the hole locatedatthetop of the
panel box. Insert the miniature plug at the end of the cable to the
matching power jack markedJ101 located atthe bottom right of thePC
board.
4. Note the fuse holder and cables from the battery. Check that they are
properly attached and not touching the enclosure or P.C. Board. A spare
fuse is provided with the keys taped to the inside left panel. Plug the wall
transformer into a 120-volt AC outlet. You should hear some beeps and the
display should come on.
5. Locatethe battery switch labeledS1 on thelower left side of theP.C.board.
The Timer is shipped from the factory with this switch in the OFF position.
Switch it to the ON position. This will connect the battery to the P.C. board
and provide a back up in case of a power loss.
6. Enter the correct date and time using the keyboard.
To enter correct date:
Press 0 (for the menu screen)
Press 1
Enter month(two digits)
Enter day (two digits)
Enter year (four digits)
Press 0
To enter correct time:
Press 0 (for the menu screen)
Press 2
Press 1
Enter hour (two digits)
Enter minute (two digits)
Enter seconds (two digits)
Enter 0 for A.M. or 1 for P.M.
Press 0
Press 0
Check if the date and time is correct. If not, repeat the above

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steps.
7. Locate the Test/Normal switch on the P.C. Board. Put the switch in Test
position. The display will change showing both a dBlevel and avoltage level
for each zone. This bypasses any programmed attenuation and allows for a
total system calibration of the LM-6 master units. Adjust the Zone 1 slide
control for a stable reading of 0 dB. Do the same for Zone 2.
8. The dB levels present here represent the change in decibels from 47dB. You
can either raise or lower the dB level (from this 47dB) here. With the
Test/Normal switch in Test position, adjust all the LM-6 master units for an
office sound level reading of 47 dB's. When all the masters have been
adjusted and tuned as necessary, put the Test/Normal switch in Normal
position. The display will change to the date and time screen. The dB
readings may change as any programmed attenuation is taken into
account.
9. Programthe timer as percustomer specifications.Refer to the programming
section of this manual.
PROGRAMMING
Thefollowing keyboardkey combinations aredocumented in a waythat assumes
you are starting from the main screen. There will be situations where it is much
quicker to gofrom onesub-menu to anotherwithout returning to andstartingfrom
the main screen. You may use these quicker routes at any time. However, for the
purpose of documentation, the main screen will be the starting point.
Date
Press 0 (for the menu screen)
Press 1
Enter month(two digits)
Enter day (two digits)
Enter year (four digits)
Press 0
Time
Press 0 (for the menu screen)
Press 2
Press 1
Enter hour (two digits)
Enter minute (two digits)
Enter seconds (two digits)
Enter 0 for A.M. or 1 for P.M.

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Press 0
Press 0
Daylight savings
Press 0 (for the menu screen)
Press 2
Press 2
Press 1 to enable, or 2 to disable
Press 0
Press 0
Press 0
To look at masking attenuation levels
Press 0 (for the menu screen)
Press 3
Press 1 for Zone 1, or 2 for Zone 2
Press 1 for Monday, 2 for Tuesday, etc.
Press 1
Press 1
Press # to advance, or * to exit
Press 0
Press 0
Press 0
Press 0
To change masking attenuation levels
Press 0 (for the menu screen)
Press 3
Press 1 for Zone 1, or 2 for Zone 2
Press 1 for Monday, 2 for Tuesday, etc.
Press 2
Press 1
Enterdesired attenuation,or # to advanceto nexthourand keep current value,or
* to exit.
Press 0
Press 0
Press 0
Press 0
Look at minutes per dB
Press 0 (for the menu screen)
Press 3
Press 1 for Zone 1, or 2 for Zone 2
Press 1 for Monday, 2 for Tuesday, etc.
Press 1
Press 2
Press # to advance, or * to exit

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Press 0
Press 0
Press 0
Press 0
Change minutes per dB
Press 0 (for the menu screen)
Press 3
Press 1 for Zone 1, or 2 for Zone 2
Press 1 for Monday, 2 for Tuesday, etc.
Press 2
Press 2
Enter desired Minutes per dB, or # to advance to next hour and keep current
value, or * to exit.
Press 0
Press 0
Press 0
Press 0
Copy day of week to next day.
Press 0 (for the menu screen)
Press 3
Press 1 for Zone 1, or 2 for Zone 2
Press 1 for Monday, or 2 for Tuesday, etc.
Press 3
Press 1 to copy, or 2 to skip to next day
Press 0
Press 0
Press 0
Press 0
Copy Zone 1 to Zone 2 (entire week)
Press 0 (for the menu screen)
Press 3
Press 1
Press 1
Press 3
Press 3
Press 1 to copy Zone 1 to Zone 2, or 2 to copy Zone 2 to Zone 1.
Press 0
Look at acclimate status
Press 0 (for the menu screen)
Press 4
Press 0
Press 0

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Turn on acclimate
Press 0 (for the menu screen)
Press 4
Press 1
Press 1
Press 0
Press 0
Press 0
Turn off acclimate
Press 0 (for the menu screen)
Press 4
Press 1
Press 1
Press 0
Press 0
Press 0
Change acclimate dB's / days per dB
Press 0 (for the menu screen)
Press 4
Press 1
If Acclimate is OFF, Press 1
Press 2
Enter Acclimate dB's, or # to keep current value
Enter days per dB, or # to keep current value
Press 0
Press 0
Press 0
Acclimate help screen
Press 0 (for the menu screen)
Press 4
Press 2
Press # to see next three lines, or * to exit
Press 0
Press 0
Help screen text: (reads)
Acclimate dB's specifies the number of dB's to attenuate loudness ofsoundmasking when
it is initially installed. Days per dB specifiesthe numberof daysto elapsebefore an increase
of +1 dB of loudness will occur. This +1 dB increase will occur at 12:00 midnight, except on
Saturday and Sundays. The +1 dB increase will continue until the acclimate dB'sreaches 0.
Example:
Acclimate dB's = -6. Days per dB = 3 days. This means that an increase of 1 dB will occur

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every 3 days, and will last for 18 days (6 x 3 = 18), not counting Saturday and Sunday.
Minutes per dB help screen
Press 0 (for the menu screen)
Press 3
Press 1 or 2
Press 1, 2, 3, 4, 5, 6 or 7
Press 1 or 2
Press 3
Press # to see next three lines, or * to exit
Press 0
Press 0
Press 0
Press 0
Help screen text: (reads)
Minutes per dB specifies the number of minutes it will take to change attenuation by 1 dB.
Example: Assume the following.
Attenuation setting for 5 PM to 8 AM is -6 dB. Attenuation setting for 8 AM to 5 PM is 0 dB.
The Min / dB setting for the same time period is 5 minutes. Also assume that the time
of day is 8:00 AM. This means that at 8:05 AM, attenuation will change to -5 dB. 8:10 AM,
attenuation will change to -4 dB.8:15AM,attenuation will change to -3dB. 8:20AM,atten-
uation will change to -2 dB. 8:25 AM, attenuation will change to -1 dB. And finally at 8:30
AM, attenuation will change to 0 dB. Attenuation will remain at 0 dB level until 5:00 PM.5:05
PM, attenuation will change to -1 dB. 5:10 PM, attenuation will change to -2 dB. 5:15 PM,
attenuation will change to -3 dB. 5:20 PM, attenuation will change to -4 dB. 5:25 PM,
attenuation will change to -5 dB. And finally at 5:30 PM, attenuation will change to -6 dB.
Attenuation will remain at -6 dB level until a difference in dB level setting is encountered
the following day.
Leap years
Leap years are preprogrammed and automatically accountfor February 29when
appropriate.
Daylight savings occurrences
The first Sunday in April at 2:00 A.M., the hour will be advanced to 3:00 A.M. On the
last Sunday in October at 2:00 A.M., the hour will be set back to 1:00 A.M.
Reset button
When the reset button is pressed or power is first applied to the timer, all user
programming will be lost. The date and time will also be incorrect. You must first re-
enter the correct date and time. Attenuation values, minutes per dB values and

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othervalueswill besettotheir defaultvalues. These default valuesare listedbelow.
INITIAL DEFAULT VALUES
Default attenuation values after a reset
Zone 1 and 2, Monday through Sunday inclusive.
12:00 AM -6 dB
1:00 AM -6 dB
2:00 AM -6 dB
3:00 AM -6 dB
4:00 AM -6 dB
5:00 AM -6 dB
6:00 AM -6 dB
7:00 AM -6 dB
8:00 AM -6 dB A "0" is actually entered at 8:00 AM.
8:05 AM -5 dB 5 minute interval is dependant on the
8:10 AM -4 dB minutes per dB setting for 8:00 AM.
8:15 AM -3 dB
8:20 AM -2 dB
8:25 AM -1 dB
8:30 AM 0 dB
9:00 AM 0 dB
10:00 AM 0 dB
11:00 AM 0 dB
12:00 PM 0 dB
1:00 PM 0 dB
2:00 PM 0 dB
3:00 PM 0 dB
4:00 PM 0 dB
5:00 PM 0 dB A "6" is actually entered at 5:00 PM.
5:05 PM -1 dB 5 minute interval is dependant on the
5:10 PM -2 dB minutes per dB setting for 5:00 PM.
5:15 PM -3 dB
5:20 PM -4 dB
5:25 PM -5 dB
5:30 PM -6 dB
6:00 PM -6 dB
7:00 PM -6 dB
8:00 PM -6 dB
9:00 PM -6 dB
10:00 PM -6 dB
11:00 PM -6 dB

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Default minutes per dB values after a reset
Zone 1 and 2, Monday through Sunday inclusive.
12:00 AM 5 Min/dB
1:00 AM 5 Min/dB
2:00 AM 5 Min/dB
3:00 AM 5 Min/dB
4:00 AM 5 Min/dB
5:00 AM 5 Min/dB
6:00 AM 5 Min/dB
7:00 AM 5 Min/dB
8:00 AM 5 Min/dB
8:05 AM 5 Min/dB
8:10 AM 5 Min/dB
8:15 AM 5 Min/dB
8:20 AM 5 Min/dB
8:25 AM 5 Min/dB
8:30 AM 5 Min/dB
9:00 AM 5 Min/dB
10:00 AM 5 Min/dB
11:00 AM 5 Min/dB
12:00 PM 5 Min/dB
1:00 PM 5 Min/dB
2:00 PM 5 Min/dB
3:00 PM 5 Min/dB
4:00 PM 5 Min/dB
5:00 PM 5 Min/dB
5:05 PM 5 Min/dB
5:10 PM 5 Min/dB
5:15 PM 5 Min/dB
5:20 PM 5 Min/dB
5:25 PM 5 Min/dB
5:30 PM 5 Min/dB
6:00 PM 5 Min/dB
7:00 PM 5 Min/dB
8:00 PM 5 Min/dB
9:00 PM 5 Min/dB
10:00 PM 5 Min/dB
11:00 PM 5 Min/dB
Other default values after a reset
Daylight savings is enabled.
Acclimation is off (i.e.,0 dB).If acclimation isset to on,then the following valuesare

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used by default.
Acclimate dB's = -6
Days per dB = 3
The date and time will need to be reentered after a reset.
SPECIFICATIONS
Power requirements Power consumption
24 VACRMS, 60 Hz 26-Watts maximum
Zones
2 independent zones except for acclimate dB's
500 LM-6 Master units per zone
Programming
Programmed attenuation range: 0 to -9 dB
Slide control adjustment range: +5 to -5 dB
Minutes per dB range: 1 to 6 minutes
Acclimate attenuation range: -1 to -9 dB, 0 dB when off
Acclimate days per dB range: 1 to 6 days
Acclimate length: 1 to 54 days not counting Sat. & Sun.
Maximum overall attenuation range: +5 to -18 dB
Programmed events: 24 events per day for each zone
Clock accuracy
±2 seconds per day
Battery
Rechargeable sealed lead-acid, 12 Volt, 2.2 Ah, provides approximately 24
hours backup power
TIMER RECORD SHEET
ZONE 1 Attenuation/Minutes per dB
HOUR Mon Tue Wed Thu Fri Sat Sun
12:00 AM
1:00 AM
2:00 AM
3:00 AM
4:00 AM
5:00 AM
6:00 AM

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7:00 AM
8:00 AM
9:00 AM
10:00 AM
11:00 AM
12:00 PM
1:00 PM
2:00 PM
3:00 PM
4:00 PM
5:00 PM
6:00 PM
7:00 PM
8:00 PM
9:00 PM
10:00 PM
11:00 PM
A
dditional Notes:
Acclimation: ON/OFF ______ Acclimate dB's: _______ Days per dB:
TIMER RECORD SHEET
ZONE 2 Attenuation/Minutes per dB
HOUR Mon Tue Wed Thu Fri Sat Sun
12:00 AM
1:00 AM
2:00 AM
3:00 AM
4:00 AM
5:00 AM
6:00 AM
7:00 AM

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8:00 AM
9:00 AM
10:00 AM
11:00 AM
12:00 PM
1:00 PM
2:00 PM
3:00 PM
4:00 PM
5:00 PM
6:00 PM
7:00 PM
8:00 PM
9:00 PM
10:00 PM
11:00 PM
A
dditional Notes:
Acclimation: ON/OFF ______ Acclimate dB's: _______ Days per dB: _____
NOTES

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