Instruction/ maintenance manual of the product 7ML19985AB01 Siemens
Go to page of 112
Instruction Manual Nov ember 2005 OCM III open channel.
© Siemens Milltronics Process In struments Inc. 2005 Safety Guidelines: Warning notices must be observed to ensure p ersonal safety as well as that of others, and to protec t the product and the connected equipment. These war ning notices are accompanied by a clarification of the level of cautio n to be observed.
TABLE OF CONTENTS TITL E PAGE A B OUT THIS .. . About T his M a nua l 7 About the O C M - 3 7 SPECIFICA TIONS 9 P rogra mme r 1 0 Tr an s d u c er 11 Tem p er at u r e Sen s o r 11 Cab l i n g 11 C om.
STA R T UP Gener a l 21 K ey p ad 21 Le ge nd 2 2 I nitia l S ta rt U p 2 2 F unda me nta l C he cks 2 5 OPERA T ION Mem or y 27 Sec u r i ty 27 Un i ts 27 F low C a lcula tion 2 8 Di s p lay 28 Dam p.
‘ D’ PA RA METER LISTING 39 ‘F ’ P AR AM E T E R LI S T I N G 4 1 ‘ P’ PA RA METER L ISTING 43 ‘ U’ PA RA METERS FOR P3 PRIMA RY ELEMENT 51 S imple E xpone ntia l D e vice s, P 3 = 0 5.
7ML 19985A B 01 OCM III 6.
ABOUT THIS ... ABOUT THIS MANUAL Although the O C M - 3 is very ‘a pproa cha ble ’ due its dia logue ca pa bilitie s a nd intuitive ope ra tion, the use r should be fa milia r with this ma nua l. T his ma nua l provide s the use r with the ne ce ssa ry informa tion re quire d to insta ll, sta rt up a nd ope ra te the O C M - 3 .
Th e OCM-3 c o n v ert s t h e h ead m eas u r em en t i n t o f l o w r ate, b u t al s o p r o v i des a ve locity se nsor input f or a pplica tions whe re a flow ve locity me a sure me nt is re quire d to pe rf orm the flow ca lcula tion.
SPECIFICATIONS P owe r: » dc supply: » 9 to 3 0 V D C , 8 W ma x and / or » a c supply: » 100/ 115/200/230 V ac ± 15%, 50/ 60 Hz, 20 VA m ax E nvironme n ta l: » loca tion » indoor / outdoor ».
» i s o l ati o n: 300 V ac c on t i nuous » r elay s : » 3 al ar m /c on t r o l r el ay s » 1 form ’C ’ S P D T conta ct pe r re la y, ra te d a t 5 A at 250 V ac non- inductive or 3 0 V dc .
B att er y : » 9 V (A NSI / NEDA 1604, PP3 o r eq u i v alen t ) o r 3 V lithium b a tte ry TRANSDUCER Mo d el : » XRS-5* Ref er t o as s o c i ated Tr an s d u c er m anu al . TEMPERATURE SENSOR M ode l: » T S - 2 , LT S - 1 or LT S - 1 C Ref er t o as s o c i ated Tem p er atu r e Sen s o r m anu al .
Auxilia ry I nput: » Be lde n 8760 or eq u iv al en t 24 V Ou t p u t : » B eld en 8760 COMMUNICATION SOFTWARE M illtronics U tilitie s S of twa re on st a nda rd P C floppy disk f or D O S 3 .
INSTALLATION Insta lla tion s hal l only be perfor med by qu ali fied perso nnel and in accor dance with local g overning regu lations. INSTALLING THE OCM-3 T he O C M - 3 should be mounte d in a cle a n, dry a re a tha t is: within the a mbie nt te mpe ra t ure ra nge a nd suita ble for the spe cifie d e nclosure .
OCM-3 LAYOUT boa rd A boa rd B displa y boa rd Hazardous volt age present on tr ansduc er t ermi nals duri ng opera ti on. dc ter minal s shal l be suppl ied f rom SELV source i n accor dance wit h I EC 101 0- 1 Anne x H.
SYSTEM DIAGRAM 98/03/05 OCM- 3 M i ll tronics t ra nsdu ce r, s ee S p eci fic ati o ns M il lt ronics T S - 2 , t em p er at u re s en s o r customer de vi ce c u s to m er alar m , pump or cont r ol.
INSTALLING THE TRANSDUCER INSTALLING THE TEMPERATURE SENSOR Max c ab l e r u n 183 m (600 f t ) o f R G - 6 2 U or e quiva le nt . C a ble must be run in a grounde d me ta l conduit with no othe r ca bling (e xce pt T e mp. S e nsor ca ble ) . G round shie ld a t O C M - 3 only.
mA OUTPUT RELAYS All re la ys a re ce rtifie d for use in e quipme nt whe re the short circuit ca pa city of the circuits in which the y a re conne cte d is li mite d by fuse s ha ving ra tings not e xce e ding the ra ting of the re la ys. i s o lat ed 0 o r 4 t o 20 m A o u tp ut (P26) i nt o 1 K Ω l oa d ma ximu m.
SYNCHRONIZATION W he re two to a ma ximum of twe lve tra nsduce rs will be sha ring a common conduit the O C M - 3 s should be synchroniz e d. I n orde r to synchroniz e O C M - 3 s: » re move jumpe r J1 on boa rd A on a ll but one O C M - 3 » inte rconne ct the S Y N C te rmina l ( T B1 - 2 0 ) of a ll O C M - 3 s.
POWER CONNECTIONS T h e O C M - 3 powe r supply a cce pts 100, 115, 200 or 230 V ac p er s w i t c h SW1 ( boa rd B) se le ction a nd 9 to 3 0 V dc. T he O C M - 3 ope ra te s e ithe r unde r a c or dc powe r, or both a c a nd dc live simulta ne ously.
INSTALLING THE MEMORY BACK-UP BATTERY T he me mory ba tte ry, B1 ( se e S pe cifica tions) should be re pla ce d ye a rly to insure me mory ba ck up during le ngthy powe r outa ge s. An on boa rd ca pa citor provide s one hour of me mory re te ntion in orde r to pre se rve the me mory while the ba tte ry is be ing cha nge d.
START UP GENERAL F or t he initia l sta rt up, it is a dvisa ble to use the progra m me r for progra mming the OCM-3. Th e p r og r am m er t r an s m i t s a c od ed i n f r ar ed s i gn al eac h t i m e a k ey i s p r es s ed .
LEGEND P re ss the a ssocia te d progra mme r ke y: D ispla y shown on O C M - 3 : P rogra mme r ke y: INITIAL START UP Afte r insta lla tion proce dure s ha ve be e n comple te d, the O C M - 3 ma y be powe re d up.
fa ctory se t se curity code 2.71828 m u s t b e en ter ed if the wrong la ngua ge wa s se le cte d, it ma y be cha nge d he re continue progra m ming by e nte ring the de sire d options a nd a dva ncing until the s c r ol l r et ur n s t o ‘ P0’ .
I f da ta logging is de sire d, the time a nd da t e must be se t. e. g . 1141 11: 41 a.m . , se conds a re a lwa ys a ssume d to be 0 0 tim e is di spla ye d i n hh:mm:ss e. g . 12101492 Oc t o ber 12, 1492 Th e s t ar t u p p ro c edu r e i s n o w c om p l et e.
FUNDAMENTAL CHECKS Fo r ac c u r ate d eter m in at i o n o f f l o w r at e, ac c u r at e h ead m eas u r em en t i s es s en t i al . C he ck the following a nd corre ct if ne ce ssa ry. » c hec k D5 f o r c o r r ec t tem p erat u r e at tr an s du c er l o c at io n .
7ML 19985A B 01 OCM III 26.
OPERATION U pon powe r up, t he t ra nsduce r is fire d pe riodica lly a s se t by P 3 6 . A long inte rva l be t we e n me a sure me nt s ma y be de sira ble in orde r to conse rve powe r* whe n ope ra ting the O C M - 3 from a D C source of limite d ca pa city.
FLOW CALCULATI ON Absolute vs. ra tiome tric T he O C M - 3 ca n be progra mme d to use e ithe r of two me thods ( P 4 ) for ca lcula ting flow f r o m t h e h ead m eas u r em ent : ab s o l u te o r r at i o m et r i c. Th e r es ul t i s t h e s am e re ga rdle ss of the me thod use d.
Flow R ate Field Totali zer Field Relay / No Echo Field Status Field T he O C M - 3 provide s illumina tion for the LC D for e a sie r vie wing of the displa y.
RELAYS Th r ee o n b o ar d m u l ti p ur p o s e r el ay s ar e p r o v i d ed b y t he O CM-3. P15, 18 an d 21 s et the re spe ctive functions for re la ys 1 , 2 a nd 3 .
T he mA functi on ca n be ove rridde n for te st purpose s by se tting the de sire d mA va lue i n t o F3. Wh en t h e v alu e i s en t er ed , t h e m A o u t p u t w i l l g o t o t h at v al u e. Wh en F 3 i s e xite d, t he mA output will re ve rt to norma l ope ra t ion.
U nde r low flow conditions, a cut- off he a d ( P 4 5 ) ca n be e nt e re d to a void tota liz ing flows occurring a t or be low the flow corre sponding to the cut- off he a d. LOGGING T he O C M - 3 provide s a n e xte nsive logging fe a ture which ca n be vie we d on the loca l displa y or re t rie ve d via the se ria l comm unica tion link.
V ie wing the da ta log Th e d ay t o t al i zer (F14) d o es n o t us e t h e m as t er t o t al i zer m u l t i p l i er (P32). It i s p o s si b l e tha t the da ily tota l ove rflows.
BLANKING Bla nking is use d to ignore the z one in front of the tra nsduce r whe re ringing or othe r f al se ec h o i s at a l ev el th at i n t er f er es w i t h t h e p r o c es s i n g o f th e t r u e ec h o . Th e minimum bla nking is fa ctory se t , but ca n be ove rridde n by e n te ring the de sire d d i s t anc e i n to P47.
T he da ily tota l will be incre a se d proportiona l to the a m ount of time the da y wa s le ngthe ne d. Adjustin g the Date I f the ca le nda r is re se t, t he O C M - 3 will a djust the log da te s a ccordingly, t a king into a ccount le a p ye a rs a nd da ys pe r m onth.
FLOW VELOCITY INPUT I n some a pplica tions, the flow ca lcula ti o n fo r t h e c h o s en p r i m ar y el em en t r eq u i r es a ve locity input. I n this type of a pplica tion, the tra nsduce r me a sure me nt is use d to c alc u l ate t h e c r o s s s ec t i o n al ar ea o f t h e f l o w .
Th e 0% an d 100% l im i t s o f t h e au x i li ar y i nput must be sca le d using pa ra me te rs P 4 3 an d P44. » se le ct P 4 3 » e nte r the volta ge corre sponding to z e ro he a d » se le ct P 4 4 » e nte r the he a d corre sponding to 5 V .
‘D’ PARAMETER LISTING R e fe r to ‘Ope ra tion’ for de ta ils. D0 h ead D1 f lo w r ate D 2 short to ta l * D 3 ma ximum flow ra te D 4 min imum fl ow ra te D5 t emp er at u r e D 6 ma ximum t.
7ML 19985A B 01 OCM III 40.
‘F’ PARAMETER LISTING R e fe r to ‘Ope ra tion’ for de ta ils. F 0 e nte r se curity code F 1 e mula tion mode * F 2 run mode F 3 ke ypa d to m A output * F 4 show time se t ti me * F 5 show d.
7ML 19985A B 01 OCM III 42.
‘P’ PARAMETER LISTING R e fe r to ‘Ope ra tion’ for de ta ils. P 0 la ngua ge 0 = en gl i s h 1 = f r en c h 2 = i t ali an 3 = g er man 4 = s pan i s h P 1 dime nsiona l units l i n ear v elo.
1 3 = R e cta ngula r Are a x Vel oc i t y 14 = Tr apezo i dal A rea x Velo c i ty 15 = Mo d i fi ed Tr ap ezo i d al A r ea x Vel oc i t y 16 = U-c han n el A r ea x Velo c i ty 17 = Ci r c ul ar A r.
P 1 3 displa y da mping 0 = o ff 1 = l o w 2 = m ed 3 = high P 1 4 displa y lighting 0 = o n 1 = au t o o f f 2 = o ff P15 / P18 / P21 r el ay 1 / 2 / 3 as s ig n m en t 0 = not in se rvice 1 = de - e.
24 = en er gi ze o n l o w A u x . v ol t s 2 5 = de - e ne rgiz e on high Aux. volts 2 6 = e ne rgiz e on high Aux. volts 2 7 = de - e ne rgiz e up control on he a d 2 8 = e ne rgiz e up control on h.
P 2 7 mA da mping (se cs) P 2 8 mA options ( e m ula t or tra cking) 0 = don’t tra ck e mula tor 1 = t r ac k emu l at o r P29 f ail -s afe t i m e (s ec s ) P30 f ail -s afe an al o g m o d e 0 = h.
P 3 4 printe r mode 0 = ne ve r print 1 = i n t erv al t o b e i n m in u t es 2 = inte rva l to be in hours 3 = print once e a ch da y P 3 5 printe r timing P36 m easu r em en t i n ter v al 0 = 1 s .
P 3 9 da ta logging ra te fix e d 0 = 1 m i n 3 = 30 1 = 5 4 = 60 2 = 15 5 = 24 h r va ri a ble ( condition ) 6 = 15/1 m i n ( % flow / mi n ) 19 = 60 / 1 ( flow ) 7 = 15 / 5 " 20 = 60 / 5 ".
P42 h ead d et er m i n at i o n 0 = b y OC M-3 1 = by a uxilia ry de vice P43 v o l t s i n f o r zer o h ead P44 h ead at 5 v o l t s i n P45 l o w f l ow c ut -o f f h ead P46 r an g e at zer o h e.
‘U’ PARAMETERS FOR P3 PRIMARY ELEMENT T he numbe r of ‘U ’ pa ra me t e rs re quire d va rie s a ccording t o the prima ry e le me nt chose n ( P 3 ) a nd the me thod of ca lcula tion ( P 4 ) . T he O C M - 3 prompts the use r by displa ying the ne xt re quire d pa ra me te r, insuring the progra mming is comple te .
17 Ci r c u l ar A r ea x V e locity 18 Gu l l Wi n g A r ea x V e locity 19 Eg g -s h ap ed A r ea x V e locity 20 Un i v er s al A r ea x V e locity Th e p r im ar y el em en t m u s t b e i n s t al l ed i n ac c o r d an c e w i t h t h e man u f act u r er s re com me nda tions a nd in a ccorda nce with a ll gove rning re gula tions.
SIMP LE EXPONEN TIAL DE VICES, P3 = 0 ‘U’ parameters required * U0 = expo nent U1 = k factor (P4 = 0 on ly) T ypica l E xpone ntia l D e vice s: » S utro ( proport iona l) we ir » h ead m eas u .
SIMP LE EXPONEN TIAL DE VICES, P3 = 0 TYPICAL SHARP-CRESTED WEIRS Typical Weir P rofiles F or ra te d flows unde r fre e f low conditions, the he a d is me a sure d upstre a m of the we ir p l at e at a mi n im u m d i s t an c e o f 3 ti m es t h e m ax i m u m h ead (i .
SIMP LE EXPONEN TIAL DE VICES, P3 = 0 KHAFAGI VENTURI F or ra te d flows unde r fre e flow conditions, the he a d is me a sure d 1 5 cm ( 6 ") upst re a m from the be ginning of the conve rging se ction. * Th e t r an s d u c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v alu e, P47.
SIMP LE EXPONEN TIAL DE VICES, P3 = 0 TYPICAL PARSHALL FLUME F or ra te d flows unde r fre e flow conditions, the he a d is me a sure d a t 2 / 3 the le ngth of the conve rging se ction upstre a m of the be ginning of the throa t se ct ion.
SIMP LE EXPONEN TIAL DE VICES, P3 = 0 TYPICAL LEOPOLD LAGCO F or ra te d flows unde r fre e f low conditions, the he a d is me a sure d a t a point upstre a m re f e re nce d to the be ginning of the conve rging se ction. R e fe r to the following t a ble .
BS-3680 Rectangular Flume, P3 = 1 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = a pproach wi dth B U4 = Cv U1 = th roat width b U5 = Cd U2 = h ump height p U6 = A U3 = th roat length L * obta in from ma nufa cture r’s spe cifica tions.
BS-3680 RECTANGULAR F LUME 3 t o 4 x h ma x L t r an sd u cer * h 0 h ead p * Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v al u e, P47.
BS-3680 Round Nose Horizontal Crest Weir, P3 = 2 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = cres t width b U3 = Cv U1 = cre st he ight p U4 = Cd U2 = c rest length L U5 = A * obta in from ma nufa cture r’s spe cifica tions. ** ca lcula te d by OC M - 3 .
BS-3680 ROUND NOS E HORIZONTAL CREST WEIR t r an sd u cer * 3 t o 4 x h ma x * Th e t r an s d u c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v alu e, P47.
BS-3680 TRAPEZOIDAL FLUME, P3 = 3 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = a pproach wi dth B U5 = Cv U1 = thro at wid th b U6 = Cd U2 = h ump height p U7 = Cs U3 = th roat length L U8 = A U4 = slop e m * obta in from ma nufa cture r’s spe cifica tions.
BS-3680 TRAPEZO I DAL FLUME p side t r an sd u cer * pla n L en d p h B 3 t o 4 x h ma x b * Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v al u e, P47.
BS-3680 U-Flume, P3 = 4 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = a pproach diameter Da U4 = Cv U1 = thro at di amete r D U5 = Cd U2 = h ump height p U6 = Cu U3 = th roat length L U7 = A * obta in from ma nufa cture r’s spe cifica tions.
BS-3680 U-FLUME L p h D 3 t o 4 x h ma x Da t r an sd u cer * 0 h ead * Th e t r an s d u c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v alu e, P47.
BS-3680 FINITE CREST WEIR, P 3 = 5 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = cre st widt h b U3 = C U1 = cre st he ight p U4 = Cp U2 = c rest length L * obta in from ma nufa cture r’s spe cifica tions. ** ca lcula te d by OC M - 3 .
BS-3680 FINITE CREST WEIR t r an sd u cer * 3 t o 4 x h ma x * Th e t r an s d u c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v alu e, P47.
BS-3680 THIN PLATE RECTANGULAR WEIR, P3 = 6 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = a pproach wi dth B U3 = Ce U1 = cre st widt h b U4 = K b U2 = cre st he ight p * obta in from ma nufa cture r’s spe cifica tions. ** ca lcula te d by OC M - 3 .
BS-3680 THIN PLATE RECTANGULAR WEIR 4 t o 5 x h ma x t r an sd u cer * * Th e t r an s d u c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v alu e, P47.
BS-3680 THIN PLATE V-NOTCH WE IR, P3 = 7 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = n otch angl e alpha U1 = Ce * obta in from ma nufa cture r’s spe cifica tions. ** ca lcula te d by OC M - 3 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te r.
BS-3680 THIN PLAT E V-NOTCH WEIR t r an sd u cer * 4 t o 5 x h ma x * Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v al u e, P47.
RECTANGULAR WEIR (CONTRACT E D), P3 = 8 ‘U’ parameters required * U0 = cr est width b * obta in from ma nufa cture r’s spe cifica tions. ** ca lcula te d by OC M - 3 .
RECTANGULAR WEIR - CONTRACTED t r an sd u cer * 4 t o 5 x h ma x * Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v al u e, P47.
ROUND PIPE, P3 = 9 ( ba se d on the M a nning F ormula ) ‘U’ parameters required * U0 = pipe insid e diam ete r D U1 = s lope (fall/ru n) s U2 = roughn ess coeffi cient n * obta in from ma nufa cture r’s spe cifica tions.
ROUND PIPE h t r an sd u cer * ** * T his dime nsion should be a t le a st 1 5 cm ( 6 " ) shorte r t ha n t h e b l an k in g v alu e, P47. ** Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i ng v al u e, P47.
PALM ER-BOWLUS FLUME *, P3 = 10 ‘U’ parameters required ** U0 = maxi mum flu me width , h max * typica lly those ma nufa cture d by W a rminste r or P l a sti- F a b.
PALMER-BOWLUS FLUM E D = pipe or se we r dia me te r 0 h ead D / 2 , point of me a sure me nt * t ran sd u cer ** * f or ra te d f lows unde r fre e flow conditions ** Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i ng v al u e, P47.
H-FLUME *, P3 = 11 ‘U’ parameters required * U0 = maxi mum li sted he ad, h max * a s de ve lope d by the U . S . D e pa rtme nt of Agri culture , S oil C onse rva tion S e rvice .
H-FLUME front point of me a sure me nt side t r an sd u cer * pla n Fl u me Si ze Po i n t o f Measu r emen t D ( fe e t) cm inche s 0.5 4.7 1.88 0.75 6.
UNIVERSAL HEAD vs FLOW, P3 = 12 Th e f l ow c u r v e i s c h ar ac ter i zed b y en t er i n g t h e h ead (A eve n ) a nd flow ( A odd ) ordina te s for the numbe r of da ta points ( n, 4 to 1 6 ) ove r the flow ra nge .
UNIVERSAL HEAD vs FLOW e . g. typica l compound we ir P a ra me te rs U 0 = 11 A 0 = 0 h ead , p o i nt 1 A 12 = 1. 05 h ead , p o i nt 7 A1 = 0 flow, point 1 A1 3 = 2 . 6 5 f low, point 7 A 2 = 0. 3 head , p o i n t 2 A 14 = 1.2 h ead , po i nt 8 A3 = 0 .
RECTANGULAR AREA X VELOCITY, P3 = 13 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = chan nel wid th B U1 = are a (h) * obta in from ma nufa cture r’s spe cifica tions. ** ca lcula te d by OC M - 3 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te r.
RECTANGULAR AREA X VELOCI TY t r an sd u cer * * Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v al u e, P47.
TRAPEZOIDAL AREA X VELOCITY , P3 = 14 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = chan nel top width B U3 = area (h) U1 = chan nel ba se width b U2 = chan nel de pth ht * obta in from ma nufa cture r’s spe cifica tions. ** ca lcula te d by OC M - 3 .
TRAPEZOIDAL AREA X VEL OCITY t r an sd u cer * * Th e t r an s d u c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v alu e, P47.
MODIFIED TRAPEZOIDAL AREA X VELOCITY, P3 = 15 ‘U’ parameters listed * ‘U’ parameters calculated ** U0 = chan nel top width B U3 = area (h) U1 = chan nel ba se width b U2 = tr ansit ion he ight ht * obta in from ma nufa cture r’s spe cifica tions.
MODIFIED TRAPEZOIDAL AREA X VELOCITY t r an sd u cer * * Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v al u e, P47.
U-CHANNEL AREA X VELOCITY, P3 = 16 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = base diame ter D U1 = are a (h) * obta in from ma nufa cture r’s spe cifica tions. ** ca lcula te d by OC M - 3 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te r.
U-CHANNEL AREA x VELOCI TY t r an sd u cer * * Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v al u e, P47.
CIRCULAR AREA X VELOCITY, P3 = 17 ‘U’ parameters listed * ‘U’ parameters calculated ** U0 = cond uit diame ter ID U1 = are a (h) * obta in from ma nufa cture r’s spe cifica tions. ** ca lcula te d by OC M - 3 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te r.
CIRCULAR AREA X VELOCITY h t r an sd uc er * ** * T his dime nsion should be a t le a st 1 5 cm ( 6 " ) shorte r t ha n t h e b l an k in g v alu e, P47. ** Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i ng v al u e, P47.
GULL-WING AREA X VELOCITY, P3 = 18 ‘U’ parameters required * ‘U’ parameters calculated ** U0 = chan nel ba se width b U4 = are a (h) U1 = lower angle alph a ( α) U2 = uppe r ang le beta ( β) U3 = tr ansit ion he ight ht * obta in from ma nufa cture r’s spe cifica tions.
GULL WING AREA X VELOCITY t r an sd u cer * V * Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i n g v al u e, P47.
EGG-SHAPED AREA X VELOCITY, P3 = 19 ‘U’ parameters listed * ‘U’ parameters calculated ** U0 = top radius R U3 = are a (h) U1 = bot tom radius r U2 = axia l disp lace ment d * obta in from ma nufa cture r’s spe cifica tions. ** ca lcula te d by OC M - 3 .
EGG-SHAPED AREA X VELOCITY t r an sd u cer * sta ndpipe * * * T his dime nsion should be a t le a st 1 5 cm ( 6 " ) shorte r t ha n t h e b l an k in g v alu e, P47. ** Th e t r an s du c er m u s t b e ab o v e t h e m ax i m u m h ead b y at l eas t t h e b l an k i ng v al u e, P47.
UNIVERSAL AREA X VELOCITY, P3 = 20 A r b it r ary ar ea i s t y p i c all y u s ed w h en t he p r i mar y el em en t an d /o r i t s f lo w d o n o t f i t an y o f t h e p r im ar y el em en t s c o v ered b y P3. Th er e i s n o u s er d i f f er en c e b et w een ab s ol u te a nd ra tiome t ric ca lcula tions P4 .
UNIVERSAL AREA X VELOCITY U0 = 8 A0 = 0 he a d, point 1 A 1 = 0. 0 area, p o i n t 1 A 2 = 0. 05 h ead , po i n t 2 A 3 = 0. 03 ar ea, po i n t 2 A 4 = 0. 1 head , p o i n t 3 A 5 = 0. 06 ar ea, po i n t 3 A 6 = 0. 15 h ead , po i n t 4 A 7 = 0. 09 ar ea, po i n t 4 A 8 = 0.
7ML 19985A B 01 OCM III 98.
MAINTENANCE T h e O C M - 3 re quire s ve ry l ittle ma inte na nce due to its sol id- st a te circuitry. H owe ve r, a progra m of pe riodic pre ve nta t ive ma inte na nc e should be initia te d.
ERROR CODES Error Code Listing 1 numbe r unde rflow 2 numbe r ove rflow 3 d i v id e er r o r 4 b ad ar g u m en t 5 inva lid pa ra me te r 6 syste m is locke d 7 h ead ex c eed s B S-3680 s pec 8 mus.
COMMUNICATIONS T he O C M - 3 provide s se ria l communica tion e i the r through M illtronics proprie ta ry bipola r curre nt loop or indust ry sta nda rd R S - 232. Co m m u n i c at i o n c a n b e u s ed t o provide a vide o or pa pe r printout of O C M a ctivity.
M illtronics provide s a sta nda rd U tilitie s softwa re pa cka ge , for conve nie nt communica tion be twe e n a n I BM P C compa tible compute r a nd t he O C M - 3 . I n a ddition, the use r ma y opt to de ve lop his own custom softwa re progra m to pe rform ta sks suite d to his spe cific ne e ds.
Interconnect ion Bipolar Current RS-232 I BM P C C ompute r C onne ction re fe r to C V C C instruction ma nua l for conne ction to compute r compute r se ria l port D B- 9 conne ctor compute r se ria.
Timed Prin t Out T he O C M - 3 ca n be progra mme d to pe riodica lly print out O C M da ta ( P 3 4 / 3 5 ) . A typica l print out will have the following forma t.
Milltronics Utilities Software Disk T he M illtronics U tilitie s S oftwa re e xpa nds t he hum a n inte rfa ce ca pa bilitie s of the OCM-3 as c om p ar ed t o th at p r o v i d ed b y t h e s i m p l e u s e of t h e i n f r a-r ed p r o g r am m er .
T he O C M - 3 U tilitie s softwa re provide d by M illtronics use s X O N / X O F F to e nsure communica tion re lia bility. T he softwa re is writte n to be e xe cute d on a n I BM P C compa tible comput e r. Th e s tan d ar d k ey bo ar d em u l at es t h e OCM-3 p r o g r am m er .
Custom Pr ogramming and Third Party Co mmunication Prog ram Us ers w h o w i s h t o w r i t e t hei r o w n s o f t w ar e to c o m m un i c at e w i t h th e OCM-3 ar e u r g ed to imple me nt a fully buffe re d ( inte rrupt drive n) se ria l link incorpora ting X O N / X O F F .
T he following is a list of comma nds for the se conda ry pa rse r: C omma nd R e sponse /a#/ t he c o n t en t o f a#, w h er e: a = A , D * , F, P an d U # = 0 through 9 e.
/ j/ re turns a code indica ti ng the re la y sta tus code re la y 123 0000 1100 2010 3110 4001 5101 6011 7111 /l / s t ar t d at a l o g d o w n l o ad .
Modem Communicat ion C ommunica tion with the O C M - 3 ove r a n a nswe r ba ck te le phone mode m is re la tive ly stra ight forwa rd. F or mode m communica tion ove r conve ntiona l te le phone line s, a m ax i mu m of 1200 o r 2400 b au d i s r ec o m m en d ed .
Considerations - s et t h e ’ c o l d s tar t ’ (F12) d ef au l t b aud t o 1200 b y r em o v in g j u m p er J 1 o n b o ar d A . - s et b o t h m o d em s an d t h e OCM-3 b au d r at es to 1200. - se t the re mote mode m to ope ra te in the ’a nswe r ba ck’ mode .
Endi ng Co mmunic ati on - t y pe W to bre a k O C M - 3 communica tion with the mode m * . Th e c o mp u t er s c reen will display a fla shing me ssa ge ‘O C M - 3 mute d’. - t y pe: +++ ( not displa ye d on the scre e n) a nd the n pre ss E N T E R T his will ca use both mode ms to switch t o the ‘comma nd’ mode .
*7ml19985AB01* Rev . 1.0 www .siemens.com/processautomation Siemens Milltronics Process Instruments Inc. 1 954 T ec hnology Drive, P .O. Box 4225 Peterborough, ON, Canada K9J 7B1 T el: (705) 7 45-2431 Fax: (705) 7 41-0466 Email: techpubs.smpi@siemens.
An important point after buying a device Siemens 7ML19985AB01 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Siemens 7ML19985AB01 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Siemens 7ML19985AB01 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Siemens 7ML19985AB01 you will learn all the available features of the product, as well as information on its operation. The information that you get Siemens 7ML19985AB01 will certainly help you make a decision on the purchase.
If you already are a holder of Siemens 7ML19985AB01, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Siemens 7ML19985AB01.
However, one of the most important roles played by the user manual is to help in solving problems with Siemens 7ML19985AB01. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Siemens 7ML19985AB01 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
