Omega Engineering Humidifier LVU 90 User Manual

Where Do I Find Everything I Need for  
Process Mea surem ent a nd Control?  
OMEGA…Of Course!  
Use r s Gu id e  
TEMPERATURE  
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Thermocouple, RTD & Thermistor Probes,  
Connectors, Panels & Assemblies  
Wire: Thermocouple, RTD & Thermistor  
Calibrators & Ice Point References  
Recorders, Controllers & Process Monitors  
Infrared Pyrometers  
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PRESSURE, STRAIN AND FO RCE  
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Transducers & Strain Gauges  
Load Cells & Pressure Gauges  
Displacement Transducers  
Instrumentation & Accessories  
®
FLO W / LEVEL  
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Rotameters, Gas Mass Flowmeters & Flow Computers  
Air Velocity Indicators  
Turbine/ Paddlewheel Systems  
http://www.omega.com  
e-mail: info@omega.com  
Totalizers & Batch Controllers  
p H/ CO NDUCTIVITY  
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pH Electrodes, Testers & Accessories  
Benchtop/ Laboratory Meters  
Controllers, Calibrators, Simulators & Pumps  
Industrial pH & Conductivity Equipment  
DATA ACQ UISITIO N  
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Data Acquisition & Engineering Software  
Communications-Based Acquisition Systems  
Plug-in Cards for Apple, IBM & Compatibles  
Datalogging Systems  
Recorders, Printers & Plotters  
HEATERS  
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Heating Cable  
Cartridge & Strip Heaters  
Immersion & Band Heaters  
Flexible Heaters  
Laboratory Heaters  
ENVIRO NMENTAL  
MO NITO RING AND CO NTRO L  
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Metering & Control Instrumentation  
Refractometers  
Pumps & Tubing  
Air, Soil & Water Monitors  
Industrial Water & Wastewater Treatment  
pH, Conductivity & Dissolved Oxygen Instruments  
LVU-90 Series  
Ultra sonic Level Tra nsm itter  
M-3444 / 0799  
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 .  
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 w r i w t t i e t n h o c p u o a t n r i n t s , e n t o f O M E G A E N G I N E E R  
r e p r o d u c e d , t r p a h n o s t l a o t c e o d p , i e o d r , r e d u c e d t o a n y  
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 .  
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  
©
C o p y r i g h t 1 9 9 6 O M E G  
. O M E G A i s c o n s t a n t l y  
O M E G A i s r e g i s t e r e d t r a d  
a
T h i s a f f o r d s o u r c u s t o m e r s  
O M E G A ’ s p o l i c y i s t o m a  
e - m a i l : u k @ o m e g a . c o m  
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  
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  
p r o b l e m s r e l a t i v e t o t h e  
R e 3 p . a i r i n s t r u c t i o n s a n d / o  
u n d e r w a r r a n t y  
M o 2 d . e l a n d s e r i a l n u m b e  
w a s P U R C H A S E D ,  
. O P . 1 n . u m b e r u n d e r w h i c h  
c o n t a c t i n g O M E G A :  
t h e f o l l o w i n g i n f o r m a t  
A F X : 4 4 ( 1 6 1 ) 7 7 7 - 6 6 2 2  
A F X : 4 4 ( 1 4 5 5 ) 2 8 3 9 1 2  
e l T : 4 4 ( 1 4 5 5 ) 2 8 5 5 2 0  
L E 9 6 T U , E n g l a n d  
1
e l T : 4 4 ( 1 6 1 ) 7 7 7 - 6 6 1  
M 4 4 5 E X , E n g l a n d  
I r l a m , M a n e , c h e s t e r  
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  
, a n d  
,
o f t h e r e p a i r  
. O P . n 1 u . m b e r t o c o v e r t h e C O S T  
,
, L e i c e A s t s e t r l s e h y i r o u B g r h t o n  
t i f i e d  
I S O 9 0 0 2 C e r  
, O m e g a D . O P r i . v B e o , x 7  
2 5 S w a n n i n g t o n R o a d , U n i t e d K i n g d o m :  
B E F O R E c o n t a c t i n g O M E G A :  
e - m a i l : g e r m a n y @ o m e g a . c o m  
e e i n o G T l e l r F m r a n y : 0 1 3 0 1  
t h e f o l l o w i n g i n f o r m a t i o n a v a i l a b l e  
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  
2 1 1 6 6  
A F X : 4 9 ( 0 7 0 5 6 ) 8 5 4 0  
o n n , G e r m a n y  
c o n s u l A t I R S R , E P  
A R R A N N T Y O N F - W O R  
e l T : 4 9 ( 0 7 0 5 6 ) 3 0 1 7  
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 :  
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 o p r e v e n t b r e a k a g e i n  
T h e p u r c h a s e r i s r e s p  
e - m a i l : f r a n c e @ o m e g a . c o m  
e e i n o F T l r l a F n r c e : 0 8 0 0 - 4 - 0 6 3 4 2  
e l T : ( 3 3 ) 1 3 0 - 6 2 1 - 4 0 0  
s h o u l d t h e n b e m a r k e  
Y S ) . T h e a s s i g n e d A R n u m V O b I e D r P R O C E S S I N G D E L A T M A E R N T D E ( I P N O R D E R T O  
’ S C U S T O M E R S E R  
A
A F X : ( 3 3 ) 1 3 0 - 6 9 9 - 1 2 0  
r a p p e s  
V I C E  
A I N O A B N T A U T H O R I Z E D R E T  
u e D 9 , e r n i s P a p i n , 7 8 1 9 0 T F r a n c e :  
D e p a r t m e n t . B E F O R E  
D i r e c t a l l w a r r a n t y  
e - m a i l : c z e c h @ o m e g a . c o m  
( 6 2 9 ) 6 3 e 1 l T : 4  
4 1 1 1  
( 6 2 9 ) 6 3 1 A F X : 4  
1 8 9 9  
I N / Q U I R I E S  
R E T U R N R E Q U E S T S  
O s t r a v s k a 7 6 7 , 7 3 3 0 1 K a C r v z i e n c a h R e p u b l i c :  
.
s u c h a m a n n e r  
e - m a i l : n l @ o m e g a . c o m  
e e i n o B T l e l n F e r l u x : 0 6 0 9 9 3 3 4 4  
e l T : ( 3 1 ) 2 0 6 4 1 8 4 0 5  
h a r m l e s s O f r M o m E G h a o A n l d y l i a b i l i t y o r  
D / I S C L A I M E A R R l a R n A g N u T a Y 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  
A F X : ( 3 1 ) 2 0 6 4 3 4 6 4 3  
A m s t e l v 1 e 8 e 0 n L , A T h e N e t h e P r o l a s n t b d u s s 8 0 3 4 , 1  
B e n e l u x :  
,
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  
o p e :  
v i c i S n e g r E u r  
n o s i t i n t e n d e O d M t o E b G e A u s e d , n o r s h a l l i t b e u s e d : C ( 1 O ) N a s D I a T I “ O B N a S s i : c  
e - m a i l : e s p a n o l @ o m e g a . c o m  
o ˜ l : ( 2 0 3 ) 3 E 5 n 9 - 1 E 6 s 6 p 0 a n e x t : 2 2 0 3  
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  
A F X : ( 9 5 ) 2 0 3 - 3 5 9 - 7 8 0 7  
e l T : ( 9 5 ) 8 0 0 - T C - O M E G A L a t i n A m e r i c a :  
S M  
M e x i c o a n d  
T E L E X : 9 9 6 4 0 4 E A S Y L I N K : 6 2 9 6 8 9 3 4 C A B L E : O M E G A  
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  
, n e g l i g e n c e ,  
T S 0 E V E R ,  
, 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 p T u I A r O c N h a O s e F r L s I A e t B f I o L r I T t h Y C h L e A r I e M i n E a D r . e L e I M x c I  
S M  
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  
S M  
A R R A N T I E S I N C L U D I N G A N Y T O 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  
S M  
T I A O N 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  
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 :  
t e n . O M E G A w  
f r o m t h e u s e o f  
a s s u m e s r e s p o  
O M E G A i s p l e a  
e - m a i l : c a n a d a @ o m e g a . c o m  
A F X : ( 5 1 4 ) 8 5 6 - 6 8 8 6  
5 A 1  
e l T : ( 5 1 4 ) 8 5 6 - 6 9 2 8  
L a v a l ( Q u e b e c ) H 7 L  
9 7 6 B e r  
, 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  
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 @ o m e g a . c o m  
e l T : ( 2 0 3 ) 3 5 9 - 1 6 6 0  
d , C T 0 6 S 9 t 0 a 7 m - 0 f o 0 4 r 7 t i f i e d  
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  
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 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  
A F X : ( 2 0 3 ) 3 5 9 - 7 7 0 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  
I S O 9 0 0 1 C e r  
O n e O m e g a D r i v e , B o x 4 U 0 4 S 7 A :  
t h A m e r i c a v : i c i S n e g r N o r  
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 a i 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  
a r r a n t y a d d O s M a E n G a A d d W i t i o n a l o n e ( 1 ) f r m o m o n d t h a t g e r o a c f 1 e p 3 u r m c h o a n s e t . h p s e r i o d o f  
O M E G A E N G I N  
. 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  
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  
S A U  
o m e g a . c o m  
T M  
I N  
M
 
SAFETY PRECAUTIONS  
WIRING  
Step Two  
Step Three  
About this Manual:  
Wiring to Terminal:  
The LVU-90 arrives from the factory pre-calibrated and pre-assem-  
bled. Use the following instructions below for wiring to the LVU-90.  
PLEASE READ THE ENTIRE MANUAL PRIOR TO  
INSTALLING OR USING THIS PRODUCT. This manual  
includes information on the LVU-90 series continuous non-contact  
level transmitter from OMEGA. Please refer to the part number  
located on the sensor label to verify the exact model which you  
have purchased.  
1. First, remove the cap of the transmitter:  
2. Look for the terminal block with two terminals.  
User’s Responsibility for Safety:  
POWER  
OMEGA manufactures a wide range of liquid level sensors and  
technologies. While each of these sensors 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 system, and maintain all  
components. The failure to do so could result in property damage  
or serious injury.  
(-) (+)  
4-20 mA  
Proper Installation and Handling:  
Because this is an electrically operated device, only properly-  
trained staff should install and/or repair this product. Use a proper  
sealant with all installations. Note: Always install the 3/4” Viton  
gasket with the LVU-92. The G threaded version will not seal  
unless the gasket is installed properly. Never overtighten the trans-  
mitter within the fitting. Always check for leaks prior to system  
start-up.  
3. Remove the terminal block to wire the LVU-90. The terminal to  
the right is positive and the terminal to the left is negative.  
4. When finished attaching the wires, assemble the LVU-90 using  
steps 1 - 3 in reverse.  
Wiring and Electrical:  
A supply voltage of 12-36 VDC is used to power the transmitter.  
The sensor systems should never exceed a maximum of 36 volts  
DC. Electrical wiring of the sensor should be performed in accor-  
dance with all applicable national, state, and local codes.  
Material Compatibility:  
The enclosure is made of Polypropylene (PP). The transducer is  
made of Polyvinylidene Fluoride (PVDF). Make sure that the  
model which you have selected is chemically compatible with the  
application liquids it will contact.  
Enclosure:  
While the transmitter housing is liquid-resistant when installed  
properly, it is not designed to be immersed. It should be mounted  
in such a way that the enclosure and diaphragm do not come into  
contact with fluid.  
Make a Fail-Safe System:  
Design a fail-safe system that accommodates the possibility of  
transmitter or power failure. In critical applications, OMEGA rec-  
ommends the use of redundant backup systems and alarms in addi-  
tion to the primary system.  
Flammable, Explosive and Hazardous Applications:  
The LVU-90 series transmitter systems should not be used within  
flammable or explosive applications.  
Warning  
Always install the 3/4" Viton gasket with the LVU-92. The LVU-  
92 G threaded version will not seal unless the gasket is installed  
properly.  
 
WIRING  
INSTALLATION  
Step Four  
Step Five  
Follow the instructions in Step 3 for wiring to the LVU-90.  
The LVCN-90 transmitter may be installed through the top wall of a  
tank. Installation requires a 3/4" NPT fitting or blind flange.  
1. Wiring to an OMEGA Continuous Controller (LVCN-51):  
Connect the (+) terminal to the positive 24 VDC, 25 mA terminal  
on the controller. Connect the (-) terminal to the GND terminal on  
the continuous controller (See illustration below). Check LVCN-  
51 instruction manual for setting the LVCN-51 for loop powered  
operation.  
1. Install the appropriate 3/4" fitting in the top wall of the tank. Prior  
to installation, make sure that the fitting has been installed prop-  
erly and checked for leaks. Use a proper sealant at the time of  
installation to ensure a liquid-tight seal. Secondly, make sure that  
the fitting’s threads are not damaged or worn.  
2. Insert the Transmitter into the fitting and tighten to hand tight.  
POWER  
3. Always check for leaks prior to system start-up. To ensure proper  
installation, a complete leak test and simulation of actual process  
conditions should be preformed.  
RELAY  
ON OFF INVERT  
1
RELAY  
INVERT  
2
LATCH  
P
W
R
DELAY  
DELAY  
(-) (+)  
4-20 mA  
Flange  
Installation  
Fitting  
Installation  
EASY CAL  
4
20  
OP  
- +  
UP  
DOWN SET  
0% INPUT 100%  
2. Wiring to a Two-Wire Loop Powered Indicator:  
The LVCN-90 requires 12-36 VDC power and an indicator which  
receives a 4-20 mA current input. Connect the (+) terminal of the  
LVCN-90 transmitter to the positive VDC terminal on the power  
supply. Connect the (-) terminal on the LVCN-90 to the (+) ter-  
minal on the loop indicator. Connect the (-) of the loop indicator  
to the (-) of the power supply (See illustration below).  
DC Power  
POWER  
Supply  
12-36 VDC  
(-) (+)  
+
-
-
+
4-20 mA  
- +  
Warning  
Do not install the LVCN-90 in pressurized applications above 30  
psi.  
Always install the 3/4" Viton gasket with the LVCN-92. The  
LVCN-92 G threaded version will not seal unless the gasket is  
installed properly.erly and checked for leaks.  
3. Wiring to a Typical PLC:  
The LVCN-90 requires a PLC which provides a 12-36 VDC exci-  
tation and receives a 4-20 mA current input. Connect the (+) ter-  
minal of the LVCN-90 transmitter to the positive VDC power ter-  
minal. Connect the (-) terminal on the LVCN-90 to the (+) chan-  
nel on the PLC. Connect the (-) of the PLC to the (-) of the power  
terminal (See illustration below).  
Use a proper sealant at the time of installation to ensure a liquid-  
tight seal. Secondly, make sure that the fitting’s threads are not  
damaged or worn.  
Avoid  
Interference from  
side of tank  
Do not  
install at  
an angle  
6
DC Power  
Supply  
12-36 VDC  
POWER  
5
4
(-) (+)  
3
+
-
2
1
0
A
4-20 mA  
- +  
Avoid  
Interference from  
obstructions in  
tank  
LVCN-90 will  
not operate in  
vacuum  
* 250 resistor typically internal to PLC  
VACUUM  
 
CALIBRATION  
CALIBRATION  
Step Six  
Step Seven  
The LVCN-90 is factory calibrated with a fixed measurement span of  
6 feet. The 4 mA position is located 72" from the transducer face. The  
20 mA position is located 3.6 inches from the transducer face. Refer  
to the current to distance and distance to current conversion charts in  
step seven for reading the current output.  
Current to Distance Conversion Chart (Nominal)  
Current Distance Current Distance Current Distance  
mA  
inches  
mA  
inches  
mA  
inches  
20  
19  
18  
17  
16  
15  
03.6  
07.9  
12.1  
16.4  
20.7  
25.0  
14  
13  
12  
11  
10  
09  
29.2  
33.5  
37.8  
42.1  
46.3  
50.6  
08  
07  
06  
05  
04  
54.9  
59.2  
63.5  
67.7  
72.0  
1. Connect a multimeter in series to read the current output.  
2. Verify that as the distance from the liquid to the LVCN-90  
increases, the current signal decreases.  
3. Verify that as the distance from the liquid to the LVCN-90  
decreases, the current signal increases.  
Distance to Current Conversion Chart (Nominal)  
Power  
Supply  
Power  
Supply  
5
20  
4
6
19  
21  
Distance Current Distance Current Distance Current  
inches  
mA  
inches  
mA  
inches  
mA  
mA  
(+)  
mA  
(+)  
3.6  
06  
12  
18  
24  
20.0  
19.4  
18.0  
16.6  
15.2  
30  
36  
42  
48  
54  
13.8  
12.4  
11.0  
09.6  
08.2  
60  
66  
72  
06.8  
05.4  
04.0  
com  
com  
3.6"  
20 mA  
72"  
3.6"  
20 mA  
4 mA  
72"  
LED Indication  
68.4"  
The LVCN-90 features a single LED indicator which is used for  
power and fail-safe indication. During normal operation, the LED  
will be ON continuously to indicate that the transmitter has power and  
a strong echo signal return strength. Should the LED begin to  
FLASH, it indicates that the transmitter has no signal return strength  
and the device has gone into a fail-safe condition. During the fail-safe  
condition, the current will increase up to 22 mA and hold until the  
acoustic signal is reacquired. Once reacquired, the LED will turn back  
ON continuously and the current will indicate the appropriate mea-  
sured value.  
4 mA  
POWER  
LED  
(-) (+)  
4-20 mA  
 
MAINTENANCE  
Step Eight  
Step Nine  
General:  
The LVCN-90 series level transmitter itself requires no periodic  
maintenance except cleaning as required. It is the responsibility of the  
user to determine the appropriate maintenance schedule, based on the  
specific characteristics of the application liquids.  
Cleaning Procedure:  
1. Power: Make Sure that all power to the transmitter, controller  
and/or power supply is completely disconnected.  
2. Sensor Removal: In all through-wall installations, make sure that  
the tank is drained well below the sensor prior to removal.  
Carefully, remove the sensor from the installation.  
3. Cleaning the Sensor: Use a soft bristle brush and mild detergent,  
carefully wash the transducer of the LVCN-90. Do not use harsh  
abrasives such as steel wool or sandpaper, which might damage  
the transmitter's surface. Do not use incompatible solvents which  
may damage the PVDF transducer or the transmitter’s PP body.  
4. Sensor Installation: Follow the appropriate steps of installation as  
outlined in the installation section of this manual.  
 

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