Specifications

Fo o t ca n d les (
F C
)
This is normally the first screen visible when any button is
p r e ssed. It displays the current light sensor reading, which
u p d a t es once a seco n d .
Any object that changes the amount of light that re flects into
the light sensor will change the readings. Whenever poss i b le ,
lean away or back down from the LS-101 to see if the light
level readings increase. Remove objects from the sensor’s
field of view if they are not normally in the area.
C o n t rol (
C T R L
)
This screen displays the lo g i c al sta te of the output to the
p ower pack, either ON or OFF. It also allows te m p o ra r y
override of the output. Pre s s Select to to g g le the output to its
o p p o s i t e sta t e. If the output was ON, one pre s s turns it OFF
and the OV R i n d i ca tor appears. The status indica tor LED also
starts to flash slow ly. Pre s s Select again to turn the output ON
again while OV R i n d i c a tor remains lit. The output re m a i n s
overridden ON or OFF until this screen is ex i ted by pre s s i n g
the Menu button. Upon exiting, the LS-101 auto m a t i ca l l y
resumes automatic co n t r ol, the OVR indica tor turns OFF and
the LED stops its slow fla s h .
If the display is left on this screen while the output is
overridden, the override will timeout in 10 minutes and the
L S-101 will return to automatic co n t r ol.
Observing the Fo o tca n d l es (
FC
) display while in ove r r i d e : I f
you want to observe the FC reading at the sensor while the
lights are either ON or OFF, you can latch the override sta te ,
then maneuver the display back to the FC display to see how
the lights ON or lights OFF sta tes affect the light level co m i n g
i n to the sensor. To latch the output in an override sta te :
1 . A c ce ss the CTRL menu ite m .
2 . P r e ss SELECT to override the output, then pre s s and hold
S E L E C T until the M E M i n d i ca t or appears in the display.
3 . To ca n cel the override, acce s s the CTRL menu again then
p re s s the SELECT button or it will auto m a t i c a l ly timeout in
10 minute s .
ON Setpoint (
O N
)
When the light level drops below this setpoint for 20 seco n d s ,
the lights turn ON. Set this value for the lowe st level that is
a c ce p ta b l e during times when the space is occ u p i e d .
The ON setpoint range is from 1 to 850 fo o t ca n d les.
The default value is 7.5 fo o tca n d l e s .
Changing either the ON or OFF setpoint initiates Te st mode
for one minute. During this one minute period, the time delays
a r e te m p o ra r i l y made very short. Te st mode is indica ted by the
ra p i d ly flashing status indica t o r.
OFF Setpoint (
O F F
)
When the light level exceeds the OFF setpoint for the length of
the Time Delay, the lights turn OFF.
N o te that the OFF setpoint updates when the ON setpoint has
been changed. The OFF Setpoint always maintains a
deadband of 25%, 50%, 75% or 100% above the ON Setpoint.
Any change in the ON setpoint causes the OFF setpoint to
re c a lc u l a te using the same perce n tage of deadband as
s e l e c t ed for the previous va l u e .
Time Delay (
T I M E
)
This adjustment determines how long the light level must
remain above the OFF setpoint befo re the lights turn OFF.
The ava i l a b l e choices are 3 minutes, 10 minutes, 20 minute s
and 30 minutes. The default value is 10 minute s .
Setup Submenu (
S E T U P
)
The Setup submenu screen provides acce ss to another set of
options. Genera l ly, these options are used in more adva n ce d
a p p l i c ations. Pre s s the Select button to acce s s the submenu.
P r e ss the Menu button to bypass the Setup submenu and
return to the initial fo o tca n d l e screen.
Te s t Mode (
T E S T
)
Te st Mode te m p o ra r i l y bypasses the normal time delays to
fa c i l i ta t e easy te sting of the LS-101 light level settings. Afte r
30 minutes, Te s t Mode ends and the normal time delays are
re sto r e d .
P r e ssing the Select button in this menu initiates or ca n ce l s
Te st Mode.
When Te s t Mode is active, the LED status indica tor fla s h e s
ra p i d ly.
O c cupancy Hold ON (
O C C
)
This adjustment option determines whether the occ u p a n c y
sensor input is used to delay turning OFF or if the input signal
is ignore d .
The fa c t ory default is Disabled ( ). If the Occ u p a n c y
function is to be used then it must be enabled (
OCC ENA
) fro m
this scre e n .
Output (
O U T
)
This adjustment option allows the sta t e of the output to be
reve rsed. The choices are either normal (NORM) or inve r t e d
( I N V ) .
When the LS-101 is set to Normal, the output signal is 0 VDC
when the lights should be OFF and 24 VDC when the lights
should be ON.
When the LS-101 is set to Invert, the output signal is 24 VDC
when the lights should be OFF and 0 VDC when the lights
should be ON.
S e r v i c e (
S e r v i c e
)
This menu is for use as dire c t ed only by Watt Sto p p e r
te c h n i cal support.
RESET TO FACTORY DEFAULTS
This is not a menu item but rather initiated at any point by
p re s sing and holding both buttons for 5 seco n d s .
When the LS-101 has been reset, the screen will display:
LS-101 #.#
( c u r rent revision number)
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