Omega Vehicle Security Switch LVCN700 Series User Manual

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Multi-Point Ultrasonic Level Switch  
T h e s e p r o d u W c t A s R a N r e I N n G o t : d e s i g n e d f o r u s e i n , a n d s h o u l d n o t b e u s e d f o r , p a t i e n t c o n n e c t e d a p p l i c a t i o n s .  
t a i n s , a n d r e s e r v e s t h e r i g h t t o a l t e r s p e c i f i c a t i o n s w i t h o u t n o t i c e .  
w r i t t e n c o n s e n t o f O  
r r o r s i t c o n -  
T h e i n f o r m a t i o n c o n t a i n e d i n t h i s d o c u m e n t i s b e l i e v e d t o b e c o r r e c t b u t O M E G A E n g i n e e r i n g , I n c . a c c e p t s n o l i a b i l i t y f o r a n y e  
p r i o r  
r e p r o d u c e d , t r p a h n o s l t a o t c e o d p , i o e r d r , e d u c e  
a p p r o p r i a t e d e v i c e u p o n c e r t i f i c a t i o n .  
©
C o p y r i g h t 1 9  
p u r s u i n g c e r t i f i c a t i o n o f i t s p r o d u c t s t o t h e E u r o p e a n N e w A p p r o a c h D i r e c t i v e s . O M E G A w i l l a d d t h e C E m a r k t o e v e r y  
I t i s t h e p o l i c y o f O M E G A t o c o m p l y w i t h a l l w o r l d w i d e s a f e t y a n d E M C / E M I r e g u l a t i o n s t h a t a p p l y  
O M E G A i s a r e g i s t e  
T h i s a f f o r d s o u r c u s  
O M E G A ’ s p o l i c y  
. O M E G A i s c o n s t a n t l y  
p r o b l e m s r e l a t i v e  
R e 3 p . a i r i n s t r u c t i o n  
w a r r a n t y  
M o 2 d . e l a n d s e r i a l n  
w a s P U R C H A S E D  
O . P . n 1 u . m b e r u n d e r w  
p r o b l e m s r e l a t i v e t o t h e p r o d u c t .  
R e 3 p . a i r i n s t r u c t i o n s a n d / o r s p e c i f i c  
M o 2 d . e l a n d s e r i a l n u m b e r o f p r o d u c t , a n d  
o f t h e r e p a i r  
O . P . n u 1 m . b e r t o c o v e r t h e C O S T  
e - m a i l : s a l e s @ o m e g a . c o . u k  
e e i n o E T l n l g F l r a n d : 0 8 0 0 - 4 8 8 - 4 8 8  
A F X : + 4 4 ( 0 ) 1 6 1 7 7 7 - 6 6 2 2  
l : e + T 4 4 ( 0 ) 1 6 1 7 7 7 - 6 6 1  
M 4 4 5 E X , E n g l a n d  
, a n d  
,
1
i n f o r m a t i o n a v a i l a b l e B E F O R E c o n t a c t i n g O M E G A :  
f o r c u r r e n t r e p a i r c h a r g e s . H a v e t h e f o l l o w i n g  
A R R A N N T Y O N F - W O R  
O M E G A :  
N o r t h b a n i k e d t , i f I r l a m , M a n c I h S e O s t 9 e 0 r 0 2 C e r  
O n e O m e g a D r i v e , R i v e r U B n e n i t d e T d K i n g d o m :  
l o w i n g i n f o r m a  
e
e c h n o l o g y C e n t r  
c o n s u l A t I O R S M R , E E P G A  
R E T U R N S , p A l e R W a R s e A h N F a O T v Y R e t h e f o l -  
e - m a i l : i n f o @ o m e g a . d e  
e e i n o G T l e l r F m r a n y : 0 8 0 0 6 3 9 7 6 7 8  
A F X : + 4 9 ( 0 ) 7 0 5 6 9 3 9 8 - 2 9  
l : e + T 4 9 ( 0 ) 7 0 5 6 9 3 9 8 - 0  
D a i m l e r s t r a s s e 2 6 , D - 7 5 3 G 9 2 e D r m e c a k n e n y p / f A r u s t r i a :  
e - m a i l : i n f o @ o m e g a s h o p . c z  
e e : 0 8 o 0 T l 0 l - F 1 - r 6 6 3 4 2  
4 2 + 0 : X ( 0 A ) F 5 9 6 3 1  
b r e a k a g e i n t r a n  
T h e p u r c h a s e r  
a n y c o r r e s p o n d  
Y S ) . T D h E e L A a s s i g n e d A  
N U M B E R F R O M  
R E T U R N I N G A N  
o n n , G e r m a n y  
V O I D P R O C E S S I N G  
T M A E R N T ( I N O V R I C D E E D R E T P O A  
’ S C U S T O M E R S E R  
A I N A N A U T H O R I Z E D R E T U R N ( A R )  
D i r e c t a l l w a r r a  
I N / Q U I R I E S  
R E T U R N R E Q U E S T S  
4 1 1 1  
1 8 9 9  
4 2 + 0 : l ( e 0 T ) 5 9 6 3 1  
.
s u c h a m a n n e r  
F r y s t a t s k a 1 8 4 , 7 3 3 0 1 K a C r v z i e n c a h , C R z e e c p h u R b e l p i u c b : l i c  
a n y m o l r i a b f s i s l i e t l y m o r r a d h a m a g e w h O d l a M t o s h E o G e v A e r a r i s i n g o  
D / I S C L A I M R E A R A l N a n T g Y u a g e , a n i d n a o d u d r i t b i o a s n i a c l l W y  
m e d i c a l a p p l i c a  
d n a  
O M E G A  
, p u r c h a s e r w i l l i n d e m n i f y  
a s s u m e s O n , M o E r e G s A p o n s i b i l i t y a s s e t f o r t h  
o p e :  
v i c i S n e g r E u r  
,
a p p l i c a t i o n s o r u  
C o m p o n e n t ” u n  
i n f o @ o m e g a . m x  
A F X : ( 0 0 1 ) 2 0 3 - 3 5 9 - 7 8 0 7  
e - m a i l : e s p a n o l @ o m e g a . c o m  
E n E s p a n o l : ( 0 0 1 ) 2 0 3 - 3 5 M 9 - 7 e 8 x 0 3 i c o  
e t n n d e t i d o t o n s i b e u s e d , O n M o r E G s h A a l l i t b e u s e d : ( 1 ) a s a “ B a s i C c O N D I T I O N S :  
c i a l d a m a g e s .  
u p o n w h i c h l i a  
i n d e m n i f i c a t i o n  
E n g i n e e r i n g S e r v i c e : 1 - 8 0 0 - 8 7 2 - 9 4 3 6 / 1 - 8 0 0 - U S A - W H E N  
C u s t o m e r S e r v i c e : 1 - 8 0 0 - 6 2 2 - 2 3 7 8 / 1 - 8 0 0 - 6 2 2 - B E S T  
S a l e s S e r v i c e : 1 - 8 0 a 0 n - 8 d 2 6 C - 6 U a 3 S 4 n 2 A a / d a 1 - : 8 0 0 - T C - O M E G A  
S M  
S M  
S M  
, n e g l i g e n c e ,  
, w h e t h e r b a s e d o n c o n t r a c t , w a r r a n t y  
t o t a l l i a b i l i t y o  
: T h e r e m e d i e s o f I p O T u N A r c O h F a s L e I A r s B e I L t I f T o Y r t h C h L e A r I e M i n E a D r . e L e I M x c I  
T I R C A U L A R P U R P O S E A R E H E R E B Y D A I B S I - L I T Y A N D F I T N E S S F O R A R W A R P A N T Y O F M E  
F o r i m m e d i a t e t e c h n i c a l o r a p p l i c a t i o n a s s i s t a n c e :  
A R R A N T I E S I N C L U D I N G A N Y O T F T I T L E , A N D A L L I M P L I E D W  
E X P R E S S E D O  
T S 0 E V E R ,  
I O T N A S O F A N Y K I N D W H A  
A R R A N T I E S O R R E P R E S E N T O M E G A M A K E  
t e n . O M E G A w  
e m a i l : c a n a d a @ o m e g a . c a  
f r o m t h e u s e o f  
A F X : ( 5 1 4 ) 8 5 6 - 6 8 8 6  
a s s u m e s r e s p o  
e l T : ( 5 1 4 ) 8 5 6 - 6 9 2 8  
, O M E G A n e i t h e r  
c o s n ’ t r o l . O M E G A  
O M E G A i s p l e a  
5 A 1  
L a v a l ( Q u e b e c ) H 7 L  
9 7 6 B e r  
C o m p o n e n t s w h  
i m p r o p e r s p e c i f  
s h o w s e v i d e n c e  
g a r  
C a n a d a :  
e - m a i l : i n f o r @ o m e g a . c o m  
F a x : ( 2 0 3 ) 3 5 9 - 7 7 0 0  
A R R A N T Y i s V O I D i f t h e u r n i z i t e d s h m o w o d s i f e i c v a i d t i e  
l i m i t e d t o m i s h a  
e l T : ( 2 0 3 ) 3 5 9 - 1 6 6 0  
, o r u n a u t h o -  
, i n c l u d i n g b u t n o t  
A R W R s ’ A N T Y d o O e M s E n G o t A a p p l y t o  
t h f e i u n i t i s f O o u M n E d G t A o , b e d e f e e c x t i a v m e i n t a w t i i o l l n b b e y  
D e p a r t m e n t w i l l  
d , C T 0 6 S 9 t 0 a 7 m - 0 f o 0 4 r 7 i e d t i f  
1 C e r I S O 9 0 0  
O n e O m e g a D r i v e , B o x U 4 S 0 4 A 7 :  
t h A m e r i c a v : i c i S n e g r N o r  
. o m e g a . c o m h t t p : / / w w w i n f o @ o m e g a . c o m  
C u s ’ s t o m e r O S e M r v E i G c e A  
I f t h e u n i t s h o u l  
c s ’ u s t o m e r s r e c t h e i a v t e O m M a E x G i m A u m  
t o c o v e r h a n d l i n g a n d s h i p p i n g t i m o e n . e T h ( 1 i s ) e y n e s a u r r e p s r o d u c p t e w r i o a d r r t a o n t t h y e n o  
r r a a n t y a d E d G M s A a n W a d d i t i o n a l o n e ( 1 ) m f r o o n m t h d g a r t a e c e o f 1 p 3 u r m c h o a n s e t . h p s O e r i o d o f  
O M E G A E N G I N  
I n t e r n e t e - m a i l  
O n - L i n e S e r v i O c e M E G A n e t  
S M  
O M E G A  
®
D / I S C L A I M E A R R W R A N T Y  
o
T M  
 
INTRODUCTION  
TECHNOLOGY  
Step Two  
Step Three  
A. Application: The general purpose ultrasonic level switch pro-  
vides non-contact level detection up to 26’ or 8m with 3 relays. Each  
relay can be configured on a single set point alarm, two latched set  
points for automatic fill or empty, two set points for out of bounds  
alarms or three set point (relays 1 and 2 only) alternation / duplexing  
. The switch is well suited for a wide range of corrosive, waste and  
slurry type media, and is broadly selected for atmospheric day tank,  
pump lift station and waste sump applications.  
About this Manual: PLEASE READ THE ENTIRE MANU-  
AL PRIOR TO INSTALLING OR USING THIS PRODUCT. This  
manual includes information on the LVCN700 series  
Ultrasonic Level Switch. Please refer to the part number  
located on the switch label to verify the exact model con-  
figuration which you have purchased.  
User’s Responsibility for Safety: Omega manufactures a  
broad range of level sensing technologies. While each of these sen-  
sors is designed to operate in a wide variety of applications, it is the  
user’s responsibility to select a sensor model that is appropriate for  
the application, install it properly, perform tests of the installed sys-  
tem, and maintain all components. The failure to do so could result  
in property damage or serious injury.  
B. Part Number: The part and serial numbers are located on the  
wrench flat. Check the part number on the product label and confirm  
which of the below model configurations you have purchased:  
Part Number  
LVCN704  
Range  
Supply  
Mount  
1” NPT  
1” NPT  
1” NPT  
1” NPT  
1” NPT  
1” NPT  
1” NPT  
1” NPT  
1” NPT  
1” NPT  
1” NPT  
1” NPT  
2” NPT  
2” NPT  
2” NPT  
2” NPT  
4’ (1.2m)  
4’ (1.2m)  
4’ (1.2m)  
95-250 VAC  
95-250 VAC  
12-28 VDC  
12-28 VDC  
95-250 VAC  
95-250 VAC  
12-28 VDC  
12-28 VDC  
95-250 VAC  
95-250 VAC  
12-28 VDC  
12-28 VDC  
95-250 VAC  
95-250 VAC  
12-28 VDC  
12-28 VDC  
LVCN704G  
LVCN704-DC  
Proper Installation and Handling: Only properly trained  
staff should install and/or repair this product. Install the switch with  
the included Viton gasket and never overtighten the switch within  
the fitting. Always check for leaks prior to system start-up.  
LVCN704G-DC 4’ (1.2m)  
LVCN709  
9.8’ (3m)  
9.8’ (3m)  
9.8’ (3m)  
LVCN709G  
LVCN709-DC  
Wiring and Electrical: A supply voltage of 95-250 VAC is  
used to power the Ultrasonic switch, and a supply voltage of 12-28  
VDC is used to power the optional DC version of the LVCN700  
series Ultrasonic switch. Electrical wiring of the switch should be  
performed in accordance with all applicable national, state, and  
local codes.  
LVCN709G-DC 9.8’ (3m)  
LVCN716  
16.4’ (5m)  
16.4’ (5m)  
16.4’ (5m)  
LVCN716G  
LVCN716-DC  
LVCN716G-DC 16.4’ (5m)  
LVCN726  
26.2’ (8m)  
26.2’ (8m)  
26.2’ (8m)  
Material Compatibility: The LVCN700 series enclosure is  
made of a flame retardant Polycarbonate (PC/ABS FR). The trans-  
ducer is made of Polyvinylidene Fluoride (PVDF). Make sure that  
the model which you have selected is chemically compatible with  
the application media.  
LVCN726G  
LVCN726-DC  
LVCN726G-DC 26.2’ (8m)  
C. NEMA 4X Enclosure: The enclosure has a flip cover with two  
1/2” NPT female conduit ports and an internal terminal strip for  
wiring. To open the enclosure, you will need a small insertion tool  
such as a screwdriver. Insert the tool into the hole located at the  
front of the enclosure and gently push on the latching mechanism  
to release the cover. Rotate the hinged cover up for 135° access to  
the faceplate and terminal strips. Before closing the enclosure,  
make sure that the enclosure gasket is properly seated, and  
that any conduit fittings, cable connectors or plugs are  
installed correctly and sealed.  
Enclosure: While the LVCN700 series housing is liquid-resis-  
tant, the unit is not designed to be operational when immersed. It  
should be mounted in such a way that the enclosure and transduc-  
er do not come into contact with the application media under nor-  
mal operational conditions.  
Make a Fail-Safe System: Design a fail-safe system that  
accommodates the possibility of switch and/or power failure.  
OMEGA recommends the use of redundant backup systems and  
alarms in addition to the primary system.  
Flammable, Explosive or Hazardous Applications:  
The LVCN700 series should not be used within classified haz-  
LVCN726  
Shown  
L
1
L
2
RELAY RELAY RELAY POWER  
1
2
3
Warning  
Cal.  
Run  
Always use the Viton gasket when installing the Ultrasonic  
switch, and make sure that all electrical wiring of the switch  
is in accordance with applicable codes.  
High  
Low  
Select  
 
PREPARATION  
CALIBRATION  
Step Four  
Step Five  
A. Supply Voltage: The power supply voltage should never exceed  
the maximum rating of 250 VAC for the LVCN700 series AC switch  
or 28 VDC for the LVCN700-DC series switch.  
A. Introduction: The switch has two modes, the RUN and CAL  
modes. In the RUN mode, the switch is operational and the relay(s)  
will energize or de-energize at the calibrated set point distances. In the  
CAL mode, the relay set point distances and states may be target-cal-  
ibrated into memory. The switch arrives from the factory without  
any preset calibration. Each relay channel may be user calibrated  
into one of the following configurations; 1) high or low level alarm,  
2) high and low level out of bounds alarm, 3) automatic fill or empty,  
or 4) duplexing/Alternating.  
LVCN700 series  
shown  
LVCN700-DC series  
shown  
HOT  
Positive  
NEUTRAL  
Negative  
VAC  
VDC  
INPUT  
INPUT  
L
1
L
2
(+) (-)  
POWER  
VAC  
POWER  
VDC  
High or Low Level Alarm: The high or  
low level alarm is programmed with a sin-  
gle set point at the desired tank level.  
B. Conduit Entrance: The enclosure has two 1/2” NPT female  
conduit ports for routing of the switch  
Energize  
supply and relay circuit wiring. Do not  
run mixed AC and DC voltages  
through the same conduit port. Route  
the supply voltage circuit through one  
port and the relay circuit(s) through the  
opposite port.  
Configured as a high alarm, the relay will  
Relay  
Port  
Supply  
Port  
De-energize  
energize if the level rises above the set  
1/2 NPT  
Conduit  
point. Configured as a low level alarm, the  
relay will energize if the level falls below  
the set point.  
High Alarm Shown  
C. Relay Fail-Safe Design:  
High and Low Level Out of Bounds  
Alarm: Programmed with two set points,  
the high and low level out of bounds alarm  
protects the top of the tank from overspill  
and the bottom of the tank from run-dry. If  
the level rises above or falls below the set  
points, the relay will energize. The relay  
will remain de-energized as long as the level  
is in between the set points.  
The switch has (3) relay channels. Each relay is a SPDT  
(single pole, double throw) type rated at 60 VA. Normally  
open (NO) or normally closed (NC) operation is user  
selected based on the desired system control and fail-safe  
logic. Always design a fail-safe system that accommo-  
RELAY  
1
Energize  
De-energize  
dates for the possibility of relay and/or power failure. The "nor-  
mal" relay state is where the relay coil is de-energized and the Red  
relay LED is OFF. Therefore, if power is cut OFF to the switch it will  
de-energize the relay. Make sure that the de-energized state is the safe  
state in your system design. As such, if switch power is lost, a pump  
will turn OFF if it is connected to the normally open side of the relay.  
Energize  
Automatic Fill or Empty: Programmed  
with two set points, the latched automatic  
fill or empty will control a pump or valve.  
When the level reaches the energize set  
point, the latching relay will energize, and  
remain energized until the level reaches the  
de-energize set point.  
E. Maximum Applied Range: Individual or cumulative effects of  
agitation, vapor or foam can reduce the overall quality of signal return  
and shorten the maximum applied range of the switch. To determine  
the maximum applied range of the switch in your application, refer to  
the below derating chart.  
De-energize  
0%  
100Khz  
Energize  
50Khz  
(Auto-Fill Shown)  
Duplex/Alternate: Programmed with  
three set points and two relays, duplexing  
will automatically fill or empty the tank  
with two pump alternation for maintenance  
and lead-lag control for back up operation.  
When the level reaches the energize set  
point, the latching relay will energize, and  
remain energized until the level reaches the  
de-energize set point. Each time the level  
50%  
Energize  
(Backup)  
High High  
Energize  
(Primary)  
High  
100%  
De-energize (All) Low  
0
1
2
3
4
5
6
7
8
9
10  
Ultrasonic Derating Chart  
reaches the energize set point, the relays will alternate. If the level  
reaches the back-up energize set point, both relays will energize until  
the level reaches the de-energize set point. Alternation will automati-  
cally fill or empty the tank with two pumps switching after each cycle.  
LVCN704/709  
Agitation = 1-3 @ 100 kHz  
Vapor  
Foam  
LVCN716/726  
Agitation = 1-3 @ 50 kHz  
= 4-6 @ 100 kHz  
= 5-6 @ 100 kHz  
Vapor  
Foam  
= 3-5 @ 50 kHz  
= 4-6 @ 50 kHz  
 
CALIBRATION  
PROGRAMMING  
Step Six  
Step Seven  
A. Programming a Relay Channel: The relay set points are tar-  
get calibrated using the appropriate HIGH and/or LOW two key-  
stroke button sequence at each target distance (D1=distance one, D2  
= distance two and D3 = Distance 3) per the following logic.  
B. Calibration Tools: To target calibrate the switch set points, you  
will need the appropriate power supply (95-250 VAC or 12-28 VDC  
for DC version), tape measurer, flat reflective target such as a wall, and  
optional Omega box insert for use as a product holder.  
Relay Function  
Button Sequence @ Distance(s)  
High-High (D1)  
Low-Low (D1)  
High-High (D1) & Low-Low (D2)  
Low-High (D1) & High-Low (D2)  
High-Low (D1) & Low-High (D2)  
C. Off Tank Target Calibration: The switch’s relay set points may  
be target calibrated OFF the tank or installed ON the tank. Generally,  
target calibration is done OFF the tank because it is easier to move the  
switch rather than raise or lower the liquid level to the desired relay  
set point distances. Locate a flat reflective calibration target such as a  
wall. Place the switch perpendicular to the target in the provided  
1. High level alarm  
2. Low level alarm  
3. Out of bounds alarm  
4. Automatic fill  
5. Automatic empty  
6. Duplexing/Alternation [High-Low (D1) & Low-High (D2), Rly 1]  
& [High-High (D3), Rly 2]  
Omega box insert or equivalent  
Set Point  
holder. Alternatively, you may  
hold the switch with your hand,  
but it is critical that prior to  
entering any relay set point dis-  
tances, the product is held  
steady and perpendicular to the  
target for at least 15 seconds. If  
calibrating against a wall, it is  
recommended that the switch be  
elevated 3’ (1m) off the ground  
by placing it on a table or equiv-  
alent flat surface.  
Calibration  
After the second High or Low button key-stroke, the Power  
LED will flash from AMBER to GREEN indicating that the set  
point has been accepted into memory. If all three Relay LEDs  
flash RED and remain ON, then the button sequence was done  
incorrectly. If so, press SELECT to return to the appropriate  
relay channel and erase the previous set points per the CALI-  
BRATION section (Step #6-F) of this manual. Then re-program  
the channel with the correct button sequence.  
Set Point  
Distance  
Box  
Insert  
Tape  
Table  
Target  
Wall  
B. Programming a High or Low Level Alarm: After having  
powered the switch with the appropriate supply voltage, entered the  
CAL mode, selected a relay channel and erased any previously input  
set points, follow the below procedure (LOW level alarm instructions  
are in parenthesis):  
D. Entering the CAL Mode: To enter the CAL mode, you must  
first disable the calibration lock out feature. To do so, press and hold  
the SELECT button down. While holding the SELECT button, slide  
the RUN/CAL switch LEFT to the CAL position, and then release  
the SELECT button. At this point, all relay LEDs should be OFF.  
1. Stretch the tape measurer out to the appropriate distance in  
between the switch and target.  
2. Position the switch at the desired HIGH (LOW) set point distance  
defined as the air gap space between the transducer and the target.  
Make sure that the switch is stationary and perpendicular to  
the target before continuing.  
Cal.  
Run  
High or Low Level Alarm  
3. Press the HIGH (LOW) button  
High  
Low  
Programming  
for the first key-stroke and the  
Select  
Relay LED will blink once.  
4. Press the HIGH (LOW) button  
Set Point  
E. Selecting a Relay Channel: After entering the CAL mode,  
press the SELECT button once and the Relay 1 LED will turn ON  
indicating that the channel is now active for set point calibration.  
Press the SELECT button again until the desired Relay channel  
becomes active.  
Box  
Insert  
again for the second key-stroke  
and the Relay LED will blink  
twice.  
Tape  
Distance  
Table  
5. The Power LED will flash from  
AMBER to GREEN when the  
set point has been accepted into  
memory.  
Target  
Wall  
L
1
L
2
RELAY RELAY  
RELAY  
1
POWER  
2
3
6. Press SELECT to program the next relay channel or slide the  
RUN/CAL switch RIGHT to exit the CAL mode.  
F. Erasing a Relay Channel: With the exception of new prod-  
ucts out of the box, all previously entered relay set points should be  
erased prior to new programming with the following procedure:  
High Level Alarm  
Low Level Alarm  
1. Enter CAL mode and SELECT the relay channel to erase.  
2. Simultaneously press and hold down both the HIGH and LOW  
buttons, and then release the buttons.  
Energize  
De-energize  
3. The Relay and Power LEDs will blink in an alternating pattern  
indicating that the relay set points have been erased.  
4. At this point, once the LED becomes solid, you may either re-pro-  
gram the channel with new set points or leave it inactive.  
De-energize  
Energize  
 
PROGRAMMING  
PROGRAMMING  
Step Eight  
Step Nine  
D. Programming Automatic Fill: After having powered the  
switch with the appropriate supply voltage, entered the CAL mode,  
selected a relay channel and erased any previously input set points,  
follow the below procedure:  
C. Programming a High and Low Level Out of Bounds  
Alarm: After having powered the switch with the appropriate supply  
voltage, entered the CAL mode, selected a relay channel and erased  
any previously input set points, follow the below procedure:  
1. Stretch the tape measurer out to the appropriate distance in  
between the switch and target.  
1. Stretch the tape measurer out to the appropriate distance in  
between the switch and target.  
Out of Bounds  
Automatic Fill  
2. Position the switch at the desired LOW  
set point distance defined as the greater  
of the two air gap spaces between the  
transducer and the target. Make sure  
2. Position the switch at the desired HIGH  
set point distance defined as the lesser  
of the two air gap spaces between the  
transducer and the target. Make sure  
De-energize  
Energize  
that the switch is stationary and per-  
that the switch is stationary and per-  
pendicular to the target before con-  
tinuing.  
pendicular to the target before con-  
De-energize  
tinuing.  
3. Press the LOW button for the first key-  
3. Press the HIGH button for the first key-  
Energize  
Energize  
stroke and the Relay LED will blink  
once.  
stroke and the Relay LED will blink  
once.  
4. Press the HIGH button for the second key-stroke and the Relay  
LED will blink twice.  
4. Press HIGH again for the second key-stroke and the Relay LED  
will blink twice.  
5. The Power LED will flash from AMBER to GREEN when the  
LOW set point has been accepted into memory.  
5. The Power LED will flash from AMBER to GREEN when the  
HIGH set point has been accepted into memory.  
6. Position the switch at the desired HIGH set point distance defined  
as the lesser of the two air gap spaces between the transducer and  
the target. Make sure that the switch is stationary and perpen-  
dicular to the target before continuing.  
6. Position the switch at the desired LOW set point distance defined  
as the greater of the two air gap spaces between the transducer and  
the target. Make sure that the switch is stationary and perpen-  
dicular to the target before continuing.  
7. Press the HIGH button for the first key-stroke and the Relay LED  
will blink three times.  
7. Press LOW for the first key-stroke and the Relay LED will blink  
three times.  
8. Press the LOW button for the second key-stroke and the Relay  
LED will blink four times.  
8. Press LOW for the second key-stroke and the Relay LED will  
blink four times.  
9. The Power LED will flash from AMBER to GREEN when the  
HIGH set point has been accepted into memory.  
9. The Power LED will flash from AMBER to GREEN when the  
LOW set point has been accepted into memory.  
10. Press SELECT to program the next relay channel or slide the  
RUN/CAL switch RIGHT to exit the CAL mode.  
10. Press SELECT to program the next relay channel or slide the  
RUN/CAL switch RIGHT to exit the CAL mode.  
Automatic Fill  
Programming  
High and Low Level  
Out of Bounds Alarm Programming  
Low  
Set Point  
Low  
Set Point  
High  
Set Point  
High  
Set Point  
Box  
Box  
Insert  
Distance  
Insert  
Distance  
Tape  
Tape  
Distance  
Distance  
Table  
Table  
6
2
2
6
Target  
Wall  
Target  
Wall  
 
PROGRAMMING  
PROGRAMMING  
Step Ten  
Step Eleven  
E. Programming Automatic Empty: After having powered the  
switch with the appropriate supply voltage, entered the CAL mode,  
selected a relay channel and erased any previously input set points,  
follow the below procedure:  
Programming Duplexing Pump Control: After having powered  
the switch with the appropriate supply voltage, entered the CAL  
mode, selected relay channel 1 and erased any previously input set  
points, follow the below procedure:  
1. Stretch the tape measurer out to the appropriate distance in  
between the switch and target.  
1. Stretch the tape measurer out to the appropriate distance in  
between the switch and target.  
2. Position the switch at the desired HIGH  
set point distance defined as the lesser  
of the two air gap spaces between the  
transducer and the target. Make sure  
that the switch is stationary and per-  
pendicular to the target before con-  
tinuing.  
Automatic Empty  
Duplex  
2. Position the switch at the desired HIGH  
set point distance defined as the lesser  
of the two air gap spaces between the  
Energize  
transducer and the target. Make sure  
that the switch is stationary and per-  
pendicular to the target before con-  
tinuing.  
(Backup)  
High High  
Energize  
Energize  
(Primary)  
High  
3. Press the HIGH button for the first key-  
stroke and the Relay LED will blink  
once.  
De-energize (All) Low  
3. Press the HIGH button for the first key-  
De-energize  
stroke and the Relay LED will blink  
once.  
4. Press the LOW button for the second key-stroke and the Relay  
LED will blink twice.  
4. Press the LOW button for the second key-stroke and the Relay  
LED will blink twice.  
5. The Power LED will flash from AMBER to GREEN when the  
HIGH set point has been accepted into memory.  
5. The Power LED will flash from AMBER to GREEN when the  
HIGH set point has been accepted into memory.  
6. Position the switch at the desired LOW set point distance defined  
as the greater of the two air gap spaces between the transducer and  
the target. Make sure that the switch is stationary and perpen-  
dicular to the target before continuing.  
6. Position the switch at the desired LOW set point distance defined  
as the greater of the two air gap spaces between the transducer and  
the target. Make sure that the switch is stationary and perpen-  
dicular to the target before continuing.  
7. Press the LOW button for the first key-stroke and the Relay LED  
will blink three times.  
8. Press the HIGH button for the second key-stroke and the Relay  
LED will blink four times.  
7. Press the LOW button for the first key-stroke and the Relay LED  
will blink three times.  
9. The Power LED will flash from AMBER to GREEN when the  
LOW set point has been accepted into memory.  
8. Press the HIGH button for the second key-stroke and the Relay  
LED will blink four times.  
10. Press SELECT to program relay channel 2.  
Duplex Programming  
(Primary)  
9. The Power LED will flash from AMBER to GREEN when the  
LOW set point has been accepted into memory.  
Low  
Set Point  
High  
Set Point  
10. Press SELECT to program the next relay channel or slide the  
RUN/CAL switch RIGHT to exit the CAL mode.  
Box  
Insert  
Distance  
Tape  
Distance  
Automatic Empty  
Programming  
Table  
2
6
Target  
Wall  
Low  
Set Point  
High  
Set Point  
Box  
Insert  
Distance  
Tape  
Distance  
11. Position the switch at the desired HIGH HIGH set point distance  
defined as the air gap space between the transducer and the target.  
Make sure that the switch is stationary and perpendicular to  
the target before continuing.  
2
Table  
6
Target  
Wall  
 
PROGRAMMING  
INSTALLATION  
Step Twelve  
Step Thirteen  
Programming Duplex Pump Control (continued):  
Do not install at  
angle relative  
to the liquid  
Do not install with-  
in 3” of  
tank side wall  
Duplex Programming  
(Backup)  
Set Point  
Box  
Insert  
Tape  
Distance  
Table  
Do not install  
with objects  
in the beam  
Do not install  
in applications  
with vacuum  
11  
Target  
Wall  
VACUUM  
12. Press the HIGH button for the first key-stroke and the Relay LED  
will blink once.  
13. Press the HIGH button again for the second key-stroke and the  
Relay LED will blink twice.  
Warning  
Install the appropriate installation fitting. Make sure that  
the fitting and switch threads are not damaged or worn.  
Install the switch with the included Viton mounting gasket.  
Hand tighten the switch within the fitting. Perform an  
installed leak test under normal process conditions prior to  
system start up.  
14. The Power LED will flash from AMBER to GREEN when the set  
point has been accepted into memory.  
15. Press the SELECT switch repeatedly until BOTH LEDs for Relay  
1 and Relay 2 are ON (after Relay 3).  
16. Press the HIGH button for the first key-stroke and Relay LED will  
blink once.  
17. Press the HIGH button again for the second key-stroke and Relay  
LED will blink twice.  
Gasket A. Fitting Selection: Check the switch part number  
to determine the required fitting mount size and  
thread type. The switch is commonly installed in  
tank adapters, flanges, brackets or stand pipes.  
18. Press SELECT to program the next relay channel or slide the  
RUN/CAL switch RIGHT to exit the CAL mode.  
Note: The duplexing mode can be disabled by repeating Steps #15-18  
and pressing the LOW button instead of the HIGH button in the  
HIGH/HIGH combination.  
1. Adapter: Select a tank adapter fitting with  
Adapter  
minimal height so as to ensure that the  
installed transducer will not be substantially  
elevated into the fitting. Avoid tank adapter  
styles with threads and/or pipe stops forward  
of the installed transducer.  
Programming Alternating Control Only:  
1. To program the switch for alternating  
Alternating  
control only without the lead-lag func-  
tion, follow the instructions for  
Programming Duplexing Pump Control  
(Steps 11 and 12). The difference  
Flange  
on Riser  
2. Flange: Tall flanges with narrow risers  
impede the acoustic signal. Select a fitting  
with the right riser height versus inner diame-  
ter geometry. The switch may be elevated up  
to 12” (30 cm) in a 6” (15 cm) riser, 8” (20  
cm) in a 4” (10 cm) riser and 3” (7.6 cm) in a  
2” (5 cm) riser.  
between Duplexing and Alternation is  
High High  
the location of the Relay 2 set point. Set  
Relay 2 close to the deadband without  
crossing into the deadband and above  
the highest level of expected liquid.  
Energize  
High  
Height  
Inner Diameter  
Bracket  
De-energize (All) Low  
Note: The alternation mode can be disabled  
3. Bracket: A LVM-30 side mount bracket or  
equivalent can be used for open tank top  
installations against the side wall.  
by repeating Steps #15-18 and pressing the  
LOW button instead of the HIGH button in the HIGH/HIGH combi-  
nation.  
Alternating Programming  
(Backup)  
Stand Pipe  
4. Stand Pipe: A stand pipe may be  
used to dampen turbulence or separate  
surface foam. Select a 2” or larger  
pipe for model LVCN704/709. Select  
Set Point  
Box  
Ventilation  
Hole  
Dead Band  
a
3” or larger pipe for model  
Insert  
Tape  
Distance  
Highest  
Liquid Level  
LVCN716/726. The pipe length  
should run the measurement span. Cut  
a 45° notch at the bottom of the pipe  
and drill a 1/4” pressure equalization  
hole high in the dead band.  
Table  
2"/3" Minimum  
Diameter  
2
Target  
Wall  
Lowest  
Liquid Level  
 
WIRING  
TROUBLESHOOTING  
Step Fourteen  
Step Fifteen  
A. Power LED SOLID GREEN in RUN Mode: During normal  
operation in the RUN mode, the Power LED will remain solid  
GREEN indicating that the switch has power and is tracking the level.  
The RED Relay LEDs will be ON or OFF as programmed per the cur-  
rent level state.  
Warning  
To prevent damaging the relays, the use of an appropriate  
motor starter or secondary relay is ALWAYS recommended  
when actuating pumps or valves.  
A. Wiring a LVCN700 series (95-250 VAC) to a Pump  
(Automatic Fill or Empty) and (Independent High and Low)  
Alarms  
L
L
2
1
RELAY RELAY  
RELAY  
1
POWER  
2
3
HOT  
VAC  
NEUTRAL  
INPUT  
RED  
Green  
(Solid ON or OFF) (Solid ON)  
B. Power LED AMBER in RUN Mode: If while in the RUN mode,  
the Power LED turns solid AMBER, this indicates that the switch has  
power, but is not tracking the level and has entered into it’s FAIL-  
SAFE mode. Coincidently, all Relay LEDs will be OFF, indicating  
that the relays are in their de-energized safe-state. The switch will  
remain in the FAIL-SAFE mode until such time that it re-acquires the  
level and automatically returns to normal operation as programmed.  
Check the following points in determining why the switch is not  
tracking the level:  
High Alarm  
Motor Starter  
(Pump)  
L
L
2
1
RELAY RELAY RELAY POWER  
1
2
3
VAC  
Cal.  
Run  
Low Alarm  
High  
Low  
NEUTRAL  
VAC  
Select  
HOT  
INPUT  
L
L
2
1
B. Wiring a LVCN700-DC (12-28 VDC) to a Pump (Automatic  
Fill or Empty) and (Independent High and Low) Alarms  
RELAY RELAY  
RELAY  
1
POWER  
2
3
HOT  
VDC  
NEUTRAL  
RED  
Amber  
INPUT  
(All OFF)  
(Solid ON)  
1. Observe and attempt to correlate an application  
event such as foaming, substantial vapor and/or  
turbulence that may reduce or eliminate the  
acoustic signal strength. Read the Maximum  
Applied Range (Step #4-E) and consider rein-  
stalling the switch in a Stand-Pipe (Step #11-A-4)  
to dampen turbulence and/or separate the point of  
measurement from surface foam and/or vapor.  
Application  
High Alarm  
Motor Starter  
(Pump)  
(+) (-)  
RELAY RELAY RELAY POWER  
1
2
3
VDC  
Cal.  
Run  
Low Alarm  
High  
Low  
Installation 2. Verify the switch is installed correctly per the  
INSTALLATION section (Step #11) of this manu-  
al. Initially focus on the fitting and/or obstructions  
within the beam that may reduce or eliminate the  
acoustic signal transmission-receipt. Consider  
changing the fitting or relocating the switch to  
another area of the tank.  
NEUTRAL  
VDC  
INPUT  
Select  
HOT  
C. Wiring a LVCN700 (95-250 VAC) to Pumps (Duplex or  
Alternating) and Alarm (Out of Bounds, High or Low)  
HOT  
VAC  
NEUTRAL  
INPUT  
3. Verify that the tank height is not greater than the  
maximum range of the switch. If so, purchase and  
install a switch with the appropriate range for your  
tank height or level distance.  
Alarm  
C. Relay LED Changes State, But Relay Doesn’t Change:  
Verify that the switch is wired correctly per the WIRING section  
(Step #12) of this manual. If so, the Relays may have been damaged  
due to a high inductive load or carbon build-up over time.  
Motor Starter  
(Pump 1)  
L
L
2
1
RELAY RELAY RELAY POWER  
1
2
3
VAC  
Cal.  
Run  
Motor Starter  
(Pump 2)  
High  
Low  
NEUTRAL  
VAC  
INPUT  
Select  
HOT  
 
OPERATION  
Step Sixteen  
Functional Chart for Relay On/Off Operations  
Backup  
Primary  
Duplexing  
Control  
Operation  
Stop  
Energize  
De-Energize  
Relay 1  
Relay 2  
Energize  
De-Energize  
Backup  
Primary  
Stop  
Alternating  
Control  
Operation  
Energize  
De-Energize  
Relay 1  
Relay 2  
Energize  
De-Energize  
Start  
Stop  
Automatic  
Empty  
Operation  
Energize  
De-Energize  
Relay X  
Stop  
Start  
Automatic  
Fill  
Operation  
Energize  
De-Energize  
Relay X  
High  
Low  
Out of  
Bounds  
Operation  
Energize  
De-Energize  
Relay X  
 

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