Zelio Conrol Measuremen elays FNCTIONS These devices monior he levels of conducive liquids. They conrol he acuaion of pumps or valves o regulae levels; hey are also suiable for proecing submersible pumps from running empy or anks from overflowing. They can also conrol dosing of liquids in mixing processes and proec heaing elemens in he even of non-immersion. They have a ransparen, hinged cover on he fron face o preven accidenal alernaion of he seings. This cover can be sealed. Compaible liquids include, bu are no limied o: Spring, municipal, indusrial, and sea waer Meallic, acidic, and basic sal soluions Liquid ferilizers Non-concenraed alcohol (< 0%) Liquids in he food processing indusry, such as milk, beer, and coffee Non-compaible liquids include, bu are no limied o: Chemically pure waer Fuels and flammable liquid gases Oil and concenraed alcohol (> 0%) Ehylene, glycol, paraffin, varnish, and pain Feaures Widh 0.89 in (.5 mm) Widh 0.89 in (.5 mm) 1 1 Fine adjusmen of he ime delay (as a percenage of he maximum value of he seing range) Fine adjusmen of he response sensiiviy (as a percenage of he maximum value of he seing range) Funcion selecor swich: empy or fill. Swich combining: selecion of he response sensiiviy range selecion of ime delay on energizaion or de-energizaion of he relay Yellow LED: indicaes he relay sae (off when de-energized, on when energized) Green LED: indicaes he presence of he relay supply Deails for Swich Swich Posiion Sensiiviy 500 On delay High = 500 kω range 500 Off delay High = 500 kω range 50 On delay Medium = 50 kω range 50 Off delay Medium = 50 kω range 5 On delay Low = 5 kω range 5 Off delay Low = 5 kω range 6/005 1996 005 Schneider Elecric All ighs eserved 9
Zelio Conrol Measuremen elays OPEATING PINCIPLE Operaion is based on a change in he resisance measured beween immersed or non-immersed elecrodes. Low resisance beween elecrodes means liquid is presen. High resisance beween elecrodes means no liquid is presen. The elecrodes can be replaced by oher sensors or probes ha ransmi values represening variaions in resisance. The AC measuring volage, which is < 0 V and galvanically insulaed from he supply and conac circuis, ensures safe use and he absence of any elecrolysis phenomena. Applicaion Deecing a liquid level: operaing wih elecrodes (one reference elecrode and one high level elecrode) or an LA9M01 probe (example: prevening ank overflow) egulaing a liquid level beween a minimum and a maximum level: operaing wih elecrodes or an LA9M01 probe (example: a waer ower) Configuraion Empy funcion : The oupu relay is energized when high level elecrode is immersed, and de-energized when low level elecrode is dry. Fill funcion : The oupu relay is energized when he low level elecrode is dry, and de-energized when he high level elecrode is immersed. On model, a ime delay can be se on energizaion or de-energizaion of he oupu relay, o raise he maximum level (funcion ) or o lower he minimum level (funcion ). This funcion also makes i possible o avoid oupu relay pulsing (wave effec) when operaing wih wo elecrodes. Empy Funcion, Maximum Level Deecion ( Elecrodes or 1 Probe LA9M01) Funcion Swich Swich A1/A Empy Funcion, egulaion beween a Maximum and a Minimum Level ( Elecrodes or Probes LA9M01) Funcion Swich Swich A1/A Fill Funcion, Maximum Level Deecion ( Elecrodes or 1 Probe LA9M01) Funcion Swich Swich A1/A Empy Funcion, egulaion beween a Maximum and a Minimum Level ( Elecrodes or Probes LA9M01) Funcion Swich Swich A1/A : eference elecrode : High level elecrode : Low level elecrode When operaing wih wo elecrodes, he high level elecrode performs boh high and low level funcions. 50 1996 005 Schneider Elecric All ighs eserved 6/005
Zelio Conrol Measuremen elays SPECIFICATIONS Power Supply Circui Specificaions of elay aed Supply Volage (n) Average Consumpion a n 110 10 0 0 Vdc 80 15 0 0 Vdc 110 10 0 0 80 15 1.9 VA.6 VA. VA.9 VA.7 VA.1 VA.7 VA.6 VA. VA Vdc. W Oupu elay and Operaing Specificaions Number of SPDT (C/O) Conacs 1 C/O SPDT C/O DPDT Oupu elay Sae Swich configurable: empy or fill Elecrode Circui Specificaions Sensiiviy Scale 5 100 (adjusable) kω 0.5 5 kω.5 50 kω 5 500 kω Maximum AC Elecrode Volage (peak o peak) V V V V Maximum Curren in he Elecrodes 1 ma 1 ma 1 ma 1 ma Maximum Cable Capaciy 10 nf 00 nf 5 nf nf Maximum Cable Lengh 0 f (100 m) 00 f (1000 m) 0 f (100 m) 66 f (0 m) SELECTION Liquid Level Conrol elays Sensiiviy Scale Widh in (mm) Oupu elay Volage Caalog Number Weigh lb (kg) None 5 100 kω 0.87 in (.5 mm) 1 C/O SPDT B 0.6 (0.5) 110 10 F 0.6 (0.5) 0 0 M 0.6 (0.5) 80 15 Q 0.6 (0.5) Adjusable 0.1 10 s 0.5-5 kω.5-50 kω 5-500 kω 0.87 in (.5 mm) C/O DPDT 0 / Vdc MW 0.6 (0.5) B 0.6 (0.5) 110 10 F 0.6 (0.5) 0 0 M 0.6 (0.5) 80 15 Q 0.6 (0.5) Liquid Level Conrol Probe of Insallaion Maximum Operaing Temperaure Caalog Number Weigh lb (kg) Suspended by cable 1 F (100 C) LA9M01 0. (0.100) The elecrodes may also be incorporaed in he probes. The probes are normally designed for mouning o a ank using a bracke wih a seal (closed anks) or suspended by heir own elecrical connecing cable (boreholes, ec.). See page 5 Seing-up Probe LA9M01. For addiional applicaion daa, refer o page. LA9M01 For addiional probe, refer o page 66. 6/005 1996 005 Schneider Elecric All ighs eserved 51
Zelio Conrol Measuremen elays DIMENSIONS ail Mouning Direc Mouning.07 78.07 78 0. 6.15 80 0.89.5.5 89.5. 8 0. 6 Ø 0. Dual Dimensions = in mm Probe LA9M01 5.91 150 0.6 WIING CONNECTIONS A1 15 A1 15 5 A1 A A1 A 18 15 18 15 6 8 5 18 A 8 6 18 A A1 A Supply Volage,, Elecrodes (see able below) 15 18 1 s C/O conac 15 of he oupu relay 5 8 nd C/O conac 5 6 of he oupu relay Elecrode and Level Conrolled eference or ank ground elecrode High Level Low Level 5 1996 005 Schneider Elecric All ighs eserved 6/005
Zelio Conrol Measuremen elays 1 Seup 1. Selec he empy or fill funcion as appropriae for he applicaion.. If necessary, se poeniomeer 1 o minimum (ime delay).. Se poeniomeer o minimum. On LA, selec he lowes sensiiviy range using poeniomeer (5 or 5 ).. Wih all he elecrodes immersed, urn he sensiiviy poeniomeer oward maximum unil he relay is energized ( funcion) or de-energized ( funcion), hen exceed he hreshold by abou 10% o compensae for variaion in he supply volage. 5. If he relay does no energize, do one of he following: se a higher sensiiviy scale (selecor on ) eplace relay LG wih relay and sar he adjusmen procedure again 6. Check ha he relay de-energizes ( funcion) or energizes ( funcion) as soon as elecrodes and are ou of he liquid. If he relay does no de-energize, selec a lower sensiiviy scale. 7. Proec he elecrode connecion poin agains corrosion. In areas where hundersorms are likely, also proec he elecrode lines. NOTE: The high level can be raised from 0.1 10 s using he adjusable ime delay wih funcion. The low level can be lowered using his same ime delay wih funcion. -conducor cable in cylindrical sheah (max. Ø 0.5 in 0.6 mm ) Level Elecrode eference Elecrode (skir) Probe LA9M01 This suspended-ype probe is coaxial. In addiion o he normal (cenral) elecrode, he sainless seel skir can also ac as he ground (reference) elecrode, so no separae reference probe is needed. Conrolling one level requires one probe insead of wo; conrolling wo levels requires wo probes insead of hree. The skir also acs as a calming chamber o preven inaccuracy resuling from an agiaed surface of he liquid (waves). se only a wo-conducor connecing cable wih common cylindrical PVC sheahing and a maximum diameer of 0.5 in. (6. mm). The maximum operaing emperaure is 1 F (100 C). Probe LA9M01 can also be mouned o conainers such as ciserns or anks using a bracke or oher suiable mouning device. Connecion Examples Conrol by Elecrodes Conrol by Probes A1 High Level Low Level A Levels 1 Level 6/005 1996 005 Schneider Elecric All ighs eserved 5