Siemens 7ML19985AB01 manuale d’uso

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. Qualified Personnel: This device/s[...]

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 ommunica tion S oftwa re 1 1 I N S T ALLAT I O N In s t al l i n g t h e O CM-3 13 O utline a nd M ounting 1 3 O C M - 3 La yout 1 4 Sy s t em Di ag r a[...]

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 pi n g 29 Rel ay s 30 mA Out put 3 0 Fail -Safe 31 F low ra te a nd T ota liz ing 3 1 Logging 3 2 B l an k i n g 34 Tem per at ur e 34 T ime a nd D a t[...]

‘ 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 3 B S-3680 Rec ta ngul a r F lume , P 3 = 1 5 8 B S-3680 R ound N ose H oriz onta l C re st W e ir, P 3 = 2 6 0 B S-3680 Tr ap ezo i d al Fl u me, P3[...]

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 . As the O C M - [...]

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. The flow ra t e is tota liz e d a nd st ore d in a compre he nsive da t a log t o provide de ta ile d f low [...]

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 » al t i t ud e: » 2000 m m ax » am b i ent t em p er at u r e » – 20 t o 50 °C (–5 t o 122 °F) » re la tive humidity » suita ble for outdoo[...]

» 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 » dc output: » + 2 4 V dc » 20 m A av erag e t o 200 m A at 1/10 d u t y cycle ma x Co m m un i c at i o n : » RS-232 o r ± 2 0 mA bipola r curre[...]

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 . CABLING Tr ans d u c er: » RG-62U c oax i[...]

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 . 1 a nd up. 7ML 19985A B 01 OCM III 12[...]

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 . T he front cove r should be a cc[...]

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. Relay c onta ct t er minal s ar e for use wi th equi pment havi ng no acce ssi ble live parts and wir ing h avin g ins ulatio n [...]

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 de vice customer de vi ce custome r de vi ce customer de vi ce Mi ll tr o ni c s CVCC mA output re la y output a uxilia ry input ve locity input RS-2[...]

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. I nsula te shie ld a t junctions to pre ve nt ina dve rte nt grounding[...]

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. W iring shou ld conform to st[...]

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. I n sure tha t a ll O C M - 3 [...]

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. I f both a c a nd dc powe r a re live , the O C M - 3 norma lly dra ws powe r from the a c supply[...]

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. COMMUNICATING VIA COMPU[...]

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 . T he O C M - 3 is de signe d to a utoma tica lly scroll through the ‘A’, ‘D ’, ‘F ’, ‘P ’ a nd ‘U ’ [...]

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. U pon initia l powe ring up, the unit mome nta rily displa ys: a nd the n scrolls through the a va ila ble la ngua ge s: T h e O C M [...]

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’ . It is t h en ass um ed th at th e u s er has ent er ed al l t he re quire d pa ra me te rs. F o r[...]

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. En t er ‘ F2’ t o p l ac e t h e OCM-3 i n t h e n o r m al ope ra ting mode . N[...]

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 . » che ck D 9 for corre ct dista nce from t ra nsduce r to he a d. » c hec[...]

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. Th e ec h o i s pr o c es s ed t o d et er m i n e t h e h ead (D0). Th e f lo w r ate[...]

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. T he principa l diffe re nce is the informa tion tha t must [...]

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. I llumina tion ca n be se t ( P 1 4 ) to be norma lly on or off, or a utoma tic. W he n a utoma tic is se le cte d, the lighting will a utoma tica lly go on whe n ke ypa d a ctivity is sens[...]

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 . D e pe nding on the function se le cte d, the se pa ra me te rs de te rmine the ne e d a nd configura tion of the subse que nt re la y c on t r o l p ar am eter s , P16, 17 (r e[...]

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. Also, se e E mula tion M ode . *In th e c as e o f ab s ol u te c al c [...]

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. T h[...]

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. I n such a ca se the displa y will show + + + . + + . 7ML 19985A B 01 OCM III 33[...]

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. R inging is [...]

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. EMULATION MODE T he flow ca lcula tion ( P 3 / P 4 ) ca n be che cke d [...]

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 . B y m u l t i p l y i n g t h e ar ea w i th t h e d[...]

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 . e . g. if the he a d output is 1 V pe r m a nd the output is sca le d for 7 V a t 100% h ead (7 m[...]

‘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 te mpe ra t ure D 7 min imum te mp e ra t ure D 8 ve locity ✧ D 9 nomina l ta rge t ra nge D 1 0 a na log millia mps D11 i n ter n al DC v o l t s D [...]

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 da t e se t d a te * F 6 softwa re ide ntifi ca ti on num be r F 7 vie w mi n/ m a x da ta F 8 re se t mi n/ m a x da ta * F 9 se lf che ck * F 1 0 cha[...]

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 c i t y 0 = c ent i m et r es c ent i m etr es p er s ec o n d 1 = inche s inche s pe r se cond 2 = f eet f eet p er s ec o n d 3 = m et res m etr es[...]

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 ea x Vel o c it y 18 = Gu l l-w i n g A rea x Vel o c it y 19 = Eg g- s h ap ed A rea x Vel o c it y 20 = Un i v er sal A r ea x Vel o c it y P 4 me [...]

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 ne rgiz e on loss of e cho 2 = e ne rgiz e on loss of e cho 3 = de - e ne rgiz e on high flow ra te 4 = e ne rgiz e on high flow ra t e 5 = de - e ne[...]

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 he a d 2 9 = de - e ne rgiz e down control on he a d 3 0 = e ne rgiz e down control on he a d 3 1 = de - e ne rgiz e up control on a na log 3 2 = e ne [...]

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 = hold la st va lue 1 = a ssume va l ue in P 3 1 P31 f ai l -saf e an al o g m A (d ef aul t v al u e) P32 t o t al i zer m u l ti p l i er 0 = x 1/1000 [...]

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 ec 1 = 15 s ec 2 = 30 s ec 3 = 1 m i n 4 = 5 m i n P 3 7 s e ri a l da ta ra te 0 = 300 b au d 1 = 600 2 = 1200 3 = 2400 4 = 4800 5 = 9600 6 = 19200 P[...]

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 " 8 = 30 / 1 " 21 = 24 h r / 1 m i n " 9 = 30 / 5 " 22 = 24 h r / 5 m i n " 10 = 60 / 1 " 23 = 24 h r / 15 m i n " 11 = 6[...]

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 ead P 4 7 bla nking dista nce 7ML 19985A B 01 OCM III 50[...]

‘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 . Th e f ol l ow i n g i [...]

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. 7ML 19985[...]

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 r em en t o n l y » R e cta ngula r ( suppre sse d) or T ra pe z oida l ( C ipollet ti) we ir » Ka hfa gi ve nturi » P a rsha ll flume » Le opold [...]

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 .e. w h er e t h e l i q u i d surfa ce is not a ffe cte d by dra wdown) . t r[...]

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. 15 c m (6" ) pl[...]

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. * 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 [...]

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 . conve rging side front 0 h ead t r an sd u cer * dive rging pla n Q throa t point of me a su[...]

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. ** 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. Re[...]

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. 7ML 19985A B 01 OCM III 59[...]

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 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te r. Reference A[...]

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. 7ML 19985A B 01 OCM III 61[...]

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. ** ca lcula te d by OC M - 3 . M a y be vie we d by a cce ssing ‘[...]

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. 7ML 19985A B 01 OCM III 63[...]

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. ** ca lcula te d by OC M - 3 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te[...]

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. 7ML 19985A B 01 OCM III 65[...]

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 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te r. Reference A B SOL UTE CA L CUL A[...]

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. 7ML 19985A B 01 OCM III 67[...]

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 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te r. Reference A B SOL [...]

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. 7ML 19985A B 01 OCM III 69[...]

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. Reference A B SOL UTE CA L CUL ATION, P4 = 0 ¤ F or f lows tha t ca n b[...]

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. 7ML 19985A B 01 OCM III 71[...]

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 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te r. Reference A B SOL UTE CA L CUL ATION, P4 = 0 ¤ F or f lows tha t ca n be ca lcula te d by the e qua tion: q = K x (b -[...]

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. 7ML 19985A B 01 OCM III 73[...]

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. Reference A B SOL UTE CA L CUL ATION, P4 = 0 ¤ F or f lows tha t ca n be ca lcula te d by the e qua tion: q = K/ n x f( h[...]

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. 7ML 19985A B 01 OCM III 75[...]

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. ** obta in from ma nufa ct ure r’s spe cifica tions. Reference RA TIOMETRIC CA L CUL AT ION, P4 = 1 ¤ F or f lows tha t ca n be ca lcula te d by the e qua tion: q = q ca l x f([...]

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. 7ML 19985A B 01 OCM III 77[...]

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 . ** obta in from ma nufa ct ure r’s spe cifica tions. Reference RA TIOMETRIC CA L CUL AT ION, P4 = 1 ¤ F or f lows tha t ca n be ca lcula te d by the e qua tion: q[...]

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 6.7 2.69 1.0 9.1 3.63 1.5 13.5 5.38 2.0 17.9 7.19 2.5 22.5 9.00 3.0 27.2 10.88 4.5 40.5 16.19 F or ra te d flows unde r fre e flow conditions, th e he a d is me a sure d a t a point downstre a m fro [...]

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 . T he first point ( A0 , A1 ) ge ne ra lly be ing a t 0 he a d a nd the la st point ( A 2n-2 ,A 2n -1 ) ge ne ra lly be ing at m[...]

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 . 1 flow, point 2 A1 5 = 3 . 4 flow, point 8 A 4 = 0. 6 head , p o i n t 3 A 16 = 1.4 h ead , p[...]

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. Reference A B SOL UTE CA L CUL ATION, P4 = 0 ¤ F or f lows tha t ca n [...]

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. 7ML 19985A B 01 OCM III 83[...]

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 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te r. Reference A B SO[...]

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. 7ML 19985A B 01 OCM III 85[...]

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. ** 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. Refer[...]

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. 7ML 19985A B 01 OCM III 87[...]

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. 7ML 19985A B 01 OCM III 88[...]

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. 7ML 19985A B 01 OCM III 89[...]

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. 7ML 19985A B 01 OCM III 90[...]

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. 7ML 19985A B 01 OCM III 91[...]

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. ** ca lcula te d by OC M - 3 . M a y be vie we d by a cce ssing ‘[...]

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. 7ML 19985A B 01 OCM III 93[...]

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 . M a y be vie we d by a cce ssing ‘U ’ pa ra me te r. Reference A B SOL UTE CA L C[...]

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. 7ML 19985A B 01 OCM III 95[...]

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 . Th e f l ow c u r v e i s c h[...]

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. 25 h ead , po i n t 5 A 9 = 0. 18 ar ea, po i n t 5 A 10 = 0. 45 h ead , p[...]

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. T his should include re gul a r inspe ction, ge ne ra l cle a ning, ove ra ll syste m pe rforma nce che cks a nd sta nda rd good house ke e ping pra cti[...]

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 must use ra tiome tric 9 inva lid a ngle siz e 1 0 inva lid se le ct ion 11 v al u e i s v i ew -o n l y 12 c h ar ac t er i zer i n u s e 13 f eat u r e[...]

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. I t ca n a lso be use d to provide re mo te progra mming a nd re trie va l of the[...]

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. Prot oco l T he protocol for the O C M - 3 is [...]

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 l port D B- 2 5 conne ctor 1 23456 7 CVCC TB1 + - - C O M M O N T R A N S M I T R E C E I V E + S H E I L D T X D T X D S H L D + - S H L D 1 2 3 4 5[...]

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. T ime hh:mm:ss D a te dd/ mm/ yy Si te Nu mb er # Head # u n it s Vel o c i ty * # units T e mpe ra ture # units F low R a te # units F low T ota l # units * only for a pplica tions usi[...]

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 . U tilitie s S oftwa re P rogra mme r - re mote O C M - 3 progra mming - loca l progra mming - re[...]

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 . Pr es s in g t h e k ey s corre sponding to those displa ye d o[...]

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 . S ome use rs howe ve r, will not ha ve the ca pa city for such a n [...]

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.g . /P5/ t h e c o n t ent o f P5 * D pa ra me te rs a re the only pa ra me te rs which ma y be a lte re d through the se conda ry comm a nd pa rse r ( w hich bypa sse s the se[...]

/ 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 . / l1 . dd. mm. yyyy/ da t a l og down loa d - sta rt da te / l2 . dd. mm . yyyy/ da t a log down loa d - e nd da te / l3 / stop data log down loa d 7ML 19985A B 01 OCM III 109[...]

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 . Gen er all y , a l o w er bau d r ate i s more re lia b le on noisy line s. M ode [...]

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 . R e f e r t o mode m’s use r ma nua l. Communication - se le ct se ria l[...]

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 . T he loca l mode m se n[...]

*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.com Siemens Milltronics Process Instruments Inc. 2005 Subject to c hange without prior notice Print[...]