Milltronics CVCC Manuel d'instructions

Instruction Manual November 2005OCM IIIopen channel

» isolation: 300 V ac continuous» relays: » 3 alarm/control relays» 1 form ’C’ SPDT contact per relay, rated at 5 A at 250 V ac non-inductive or 30

COMMUNICATIONSThe OCM-3 provides serial communication either through Milltronics proprietarybipolar current loop or industry standard RS-232. Communic

Milltronics provides a standard Utilities software package, for convenientcommunication between an IBM PC compatible computer and the OCM-3. In additi

InterconnectionBipolar CurrentRS-232 IBM PC Computer Connection refer to CVCCinstructionmanual forconnection tocomputercomputer ser

Timed Print OutThe OCM-3 can be programmed to periodically print out OCM data (P34/35). A typicalprint out will have the following format.Time hh:mm:s

Milltronics Utilities Software DiskThe Milltronics Utilities Software expands the human interface capabilities of theOCM-3 as compared to that provide

The OCM-3 Utilities software provided by Milltronics uses XON/XOFF to ensurecommunication reliability. The software is written to be executed on an I

Custom Programming and Third Party Communication ProgramUsers who wish to write their own software to communicate with the OCM-3 are urgedto implement

The following is a list of commands for the secondary parser: Command Response/a#/ the content of a#, where: a = A, D*, F, P and U# = 0 throug

/j/ returns a code indicating the relay statuscode relay12300001100201031104001510160117111 /l/ start data log down load./l1.dd.mm.yyyy/

Modem CommunicationCommunication with the OCM-3 over an answer back telephone modem is relativelystraight forward. For modem communication over conven

Battery: » 9 V (ANSI / NEDA 1604, PP3 or equivalent) or3V lithium batteryTRANSDUCERModel: » XRS-5*Refer to associated Transducer manual.TEMPERATURE S

Considerations- set the ’cold start’ (F12) default baud to 1200 by removing jumper J1 on board A.- set both modems and the OCM-3 baud rates to 1200. -

Ending Communication- typeW to break OCM-3 communication with the modem*. The computer screenwill display a flashing message ‘OCM-3 muted’.- type: +++

*7ml19985AB01*Rev. 1.0www.siemens.com/processautomationSiemens Milltronics Process Instruments Inc.1954Technology Drive, P.O. Box 4225Peterborough, ON

Auxiliary Input: » Belden 8760 or equivalent24 V Output: » Belden 8760COMMUNICATION SOFTWAREMilltronics Utilities Software on standard PC floppy disk

INSTALLATIONInstallation shall only be performed by qualified personneland in accordance with local governing regulations.INSTALLING THE OCM-3The OCM-

OCM-3 LAYOUTboard Aboard BdisplayboardHazardous voltage present on transducer terminals during operation.dc terminals shall be supplied from SELV sour

SYSTEM DIAGRAM98/03/05OCM-3Milltronics transducer,see SpecificationsMilltronics TS-2,temperature sensorcustomer devicecustomer alarm,pump or controlde

INSTALLING THE TRANSDUCERINSTALLING THE TEMPERATURE SENSORMax cable run 183 m (600 ft) ofRG-62U or equivalent. Cable mustbe run in a grounded metal co

mA OUTPUTRELAYSAll relays are certified for use in equipment where the short circuit capacity of thecircuits in which they are connected is limited by

SYNCHRONIZATIONWhere two to a maximum of twelve transducers will be sharing a common conduit theOCM-3s should be synchronized. In order to synchronize

POWER CONNECTIONSThe OCM-3 power supply accepts 100, 115, 200 or 230 V ac per switch SW1 (board B) selection and 9 to 30 V dc. The OCM-3 operates eith

© Siemens Milltronics Process Instruments Inc. 2005 Safety Guidelines: Warning notices must be observed to ensure personal safety as well as that

INSTALLING THE MEMORY BACK-UP BATTERYThe memory battery, B1 (see Specifications) should be replaced yearly to insurememory back up during lengthy powe

START UPGENERALFor the initial start up, it is advisable to use the programmer for programming theOCM-3. The programmer transmits a coded infrared sig

LEGEND Press the associated programmer key:Display shown on OCM-3:Programmer key:INITIAL START UPAfter installation procedures have been completed, th

factory set security code2.71828 must be enteredif the wrong language was selected, it may be changed herecontinue programming by entering the desired

If data logging is desired, the time and date must be set. e.g. 114111: 41 a.m.,seconds are alwaysassumed to be 00time is displayed in hh:mm:ss

FUNDAMENTAL CHECKSFor accurate determination of flowrate, accurate head measurement is essential.Check the following and correct if necessary.» check

7ML19985AB01 OCM III 26

OPERATIONUpon power up, the transducer is fired periodically as set by P36. A long intervalbetween measurements may be desirable in order to conserve

FLOW CALCULATIONAbsolute vs. ratiometricThe OCM-3 can be programmed to use either of two methods (P4) for calculating flowfrom the head measurement: a

Flow Rate FieldTotalizer FieldRelay / No Echo FieldStatus FieldThe OCM-3 provides illumination for the LCD for easier viewing of the display.Illuminat

TABLE OF CONTENTSTITLE PAGEABOUT THIS ...About This Manual 7About the OCM-3 7SPECIFICATIONS 9Programmer 10Transducer 11Temperature Sensor 11Cabling 11

RELAYSThree on board multipurpose relays are provided by the OCM-3. P15, 18 and 21 setthe respective functions for relays 1, 2 and 3. Depending on the

The mA function can be overridden for test purposes by setting the desired mA valueinto F3. When the value is entered, the mA output will go to that v

Under low flow conditions, a cut-off head (P45) can be entered to avoid totalizingflows occurring at or below the flow corresponding to the cut-off he

Viewing the data logThe day totalizer (F14) does not use the master totalizer multiplier (P32). It is possiblethat the daily total overflows. In such

BLANKINGBlanking is used to ignore the zone in front of the transducer where ringing or otherfalse echo is at a level that interferes with the process

The daily total will be increased proportional to the amount of time the day waslengthened.Adjusting the DateIf the calendar is reset, the OCM-3 will

FLOW VELOCITY INPUTIn some applications, the flow calculation for the chosen primary element requires avelocity input. In this type of application, th

The 0% and 100% limits of the auxiliary input must be scaled using parameters P43and P44.» select P43» enter the voltage corresponding to zero head» s

‘D’ PARAMETER LISTINGRefer to ‘Operation’ for details.D0 headD1 flow rateD2 short total *D3 maximum flow rateD4 minimum flow rateD5 temperatureD6 maxi

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START UPGeneral 21Keypad 21Legend 22Initial Start Up 22Fundamental Checks 25OPERATIONMemory 27Security 27Units 27Flow Calculation 28Display 28Damping

‘F’ PARAMETER LISTINGRefer to ‘Operation’ for details.F0 enter security codeF1 emulation mode*F2 run modeF3 keypad to mA output *F4 show timeset time

7ML19985AB01 OCM III 42

‘P’ PARAMETER LISTINGRefer to ‘Operation’ for details.P0 language0 = english1 = french2 = italian3 = german4 = spanishP1 dimensional units linear

13 = Rectangular Area x Velocity 14 = Trapezoidal Area x Velocity 15 = Modified Trapezoidal Area x Velocity 16 = U-channel Area x Velocity 17 = Circul

P13 display damping0 = off1 = low2 = med3 = highP14 display lighting0 = on1 = auto off2 = offP15 / P18 / P21 relay 1 / 2 / 3 assignment0 = not in serv

24 = energize on low Aux. volts25 = de-energize on high Aux. volts26 = energize on high Aux. volts27 = de-energize up control on head28 = energize up

P27 mA damping (secs)P28 mA options (emulator tracking)0 = don’t track emulator1 = track emulatorP29 fail-safe time (secs)P30 fail-safe analog mode0

P34 printer mode0 = never print1 = interval to be in minutes2 = interval to be in hours3 = print once each dayP35 printer timingP36 measurement interv

P39 data logging rate fixed0 = 1 min 3 = 301 = 5 4 = 602 = 15 5 = 24 hr variable (condition)6 = 15/1 min (% flow / min) 19 = 60 / 1

P42 head determination0 = by OCM-31 = by auxiliary deviceP43 volts in for zero headP44 head at 5 volts inP45 low flow cut-off headP46 range at ze

‘D’ PARAMETER LISTING 39‘F’ PARAMETER LISTING 41‘P’ PARAMETER LISTING 43‘U’ PARAMETERS FOR P3 PRIMARY ELEMENT 51Simple Exponential Devices, P3 = 0 53B

‘U’ PARAMETERS FOR P3 PRIMARY ELEMENTThe number of ‘U’ parameters required varies according to the primary elementchosen (P3) and the method of calcul

17 Circular Area x Velocity 18 Gull Wing Area x Velocity 19 Egg-shaped Area x Velocity 20 Universal Area x Velocity The primary element must be instal

SIMPLE EXPONENTIAL DEVICES, P3 = 0‘U’ parameters required *U0 = exponentU1 = k factor (P4 = 0 only)Typical Exponential Devices:» Sutro (proportional

SIMPLE EXPONENTIAL DEVICES, P3 = 0TYPICAL SHARP-CRESTED WEIRSTypical Weir ProfilesFor rated flows under free flow conditions, the head is measured up

SIMPLE EXPONENTIAL DEVICES, P3 = 0KHAFAGI VENTURIFor rated flows under free flow conditions, the head is measured 15 cm (6") upstreamfrom the be

SIMPLE EXPONENTIAL DEVICES, P3 = 0TYPICAL PARSHALL FLUMEFor rated flows under free flow conditions, the head is measured at 2/3 the length ofthe conv

SIMPLE EXPONENTIAL DEVICES, P3 = 0TYPICAL LEOPOLD LAGCOFor rated flows under free flow conditions, the head is measured at a point upstreamreferenced

BS-3680 Rectangular Flume, P3 = 1‘U’ parameters required * ‘U’ parameters calculated **U0 = approach width B U4 = CvU1 = throat width b U5 = CdU2

BS-3680 RECTANGULAR FLUME3 to 4 x hmaxLtransducer *h 0headp* The transducer must be above the maximum head by at least the blanking value, P47.7M

BS-3680 Round Nose Horizontal Crest Weir, P3 = 2‘U’ parameters required * ‘U’ parameters calculated ** U0 = crest width b U3 = CvU1 = crest height p

7ML19985AB01 OCM III 6

BS-3680 ROUND NOSE HORIZONTAL CREST WEIRtransducer *3 to 4 x hmax* The transducer must be above the maximum head by at least the blanking value, P4

BS-3680 TRAPEZOIDAL FLUME, P3 = 3‘U’ parameters required * ‘U’ parameters calculated **U0 = approach width B U5 = CvU1 = throat width b U6 = CdU2

BS-3680 TRAPEZOIDAL FLUMEpside transducer *planLendphB3 to 4 x hmaxb* The transducer must be above the maximum head by at least the blanking value,

BS-3680 U-Flume, P3 = 4‘U’ parameters required * ‘U’ parameters calculated **U0 = approach diameter Da U4 = CvU1 = throat diameter D U5 = CdU2 = hu

BS-3680 U-FLUMELphD3 to 4 x hmaxDatransducer *0head* The transducer must be above the maximum head by at least the blanking value, P47.7ML19985AB01

BS-3680 FINITE CREST WEIR, P3 = 5 ‘U’ parameters required * ‘U’ parameters calculated **U0 = crest width b U3 = CU1 = crest height p U4 = CpU2 = cr

BS-3680 FINITE CREST WEIRtransducer *3 to 4 x hmax* The transducer must be above the maximum head by at least the blanking value, P47.7ML19985AB01

BS-3680 THIN PLATE RECTANGULAR WEIR, P3 = 6 ‘U’ parameters required * ‘U’ parameters calculated **U0 = approach width B U3 = CeU1 = crest width b U

BS-3680 THIN PLATE RECTANGULAR WEIR4 to 5 x hmaxtransducer ** The transducer must be above the maximum head by at least the blanking value, P47.7ML

BS-3680 THIN PLATE V-NOTCH WEIR, P3 = 7 ‘U’ parameters required * ‘U’ parameters calculated **U0 = notch angle alpha U1 = Ce*obtain from manufactur

ABOUT THIS ...ABOUT THIS MANUALAlthough the OCM-3 is very ‘approachable’ due its dialogue capabilities and intuitiveoperation, the user should be fami

BS-3680 THIN PLATE V-NOTCH WEIRtransducer *4 to 5 x hmax* The transducer must be above the maximum head by at least the blanking value, P47.7ML1998

RECTANGULAR WEIR (CONTRACTED), P3 = 8 ‘U’ parameters required *U0 = crest width b*obtain from manufacturer’s specifications.**calculated by OCM-3. M

RECTANGULAR WEIR - CONTRACTEDtransducer *4 to 5 x hmax* The transducer must be above the maximum head by at least the blanking value, P47.7ML19985A

ROUND PIPE, P3 = 9(based on the Manning Formula)‘U’ parameters required *U0 = pipe inside diameter DU1 = slope (fall/run) sU2 = roughness coeffici

ROUND PIPEhtransducer **** This dimension should be at least 15 cm (6") shorter than the blanking value, P47.** The transducer must be above

PALMER-BOWLUS FLUME *, P3 = 10 ‘U’ parameters required **U0 = maximum flume width, hmax *typically those manufactured by Warminster or Plasti-Fab.**o

PALMER-BOWLUS FLUMED = pipe or sewer diameter0headD / 2, point of measurement *transducer *** for rated flows under free flow conditions** The transdu

H-FLUME *, P3 = 11‘U’ parameters required * U0 = maximum listed head, hmax *as developed by the U.S. Department of Agriculture, Soil Conservation Ser

H-FLUMEfrontpoint of measurementsidetransducer *planFlume Size Point of MeasurementD (feet) cm inches0.5 4.7 1.880.75 6.7 2.691.0 9.1 3.631.5 13.5 5.3

UNIVERSAL HEAD vs FLOW, P3 = 12The flow curve is characterized by entering the head (Aeven) and flow (Aodd) ordinates for the number of data points (

The OCM-3 converts the head measurement into flow rate, but also provides avelocity sensor input for applications where a flow velocity measurement is

UNIVERSAL HEAD vs FLOWe.g. typical compound weirParameters U0 = 11A0 = 0 head, point 1 A12 = 1.05 head, point 7A1 = 0 flow, point 1 A13 = 2.65 flow

RECTANGULAR AREA X VELOCITY, P3 = 13‘U’ parameters required * ‘U’ parameters calculated **U0 = channel width B U1 = area (h)*obtain from manufactur

RECTANGULAR AREA X VELOCITYtransducer ** The transducer must be above the maximum head by at least the blanking value, P47.7ML19985AB01 OCM III 83

TRAPEZOIDAL AREA X VELOCITY, P3 = 14‘U’ parameters required * ‘U’ parameters calculated **U0 = channel top width B U3 = area (h)U1 = channel base wid

TRAPEZOIDAL AREA X VELOCITYtransducer ** The transducer must be above the maximum head by at least the blanking value, P47.7ML19985AB01 OCM III 85

MODIFIED TRAPEZOIDAL AREA X VELOCITY, P3 = 15 ‘U’ parameters listed * ‘U’ parameters calculated **U0 = channel top width B U3 = area (h)U1 = channel

MODIFIED TRAPEZOIDAL AREA X VELOCITYtransducer ** The transducer must be above the maximum head by at least the blanking value, P47.7ML19985AB01 OC

U-CHANNEL AREA X VELOCITY, P3 = 16‘U’ parameters required * ‘U’ parameters calculated **U0 = base diameter D U1 = area (h)*obtain from manufacturer’s

U-CHANNEL AREA x VELOCITY transducer ** The transducer must be above the maximum head by at least the blanking value, P47.7ML19985AB01 OCM III 89

CIRCULAR AREA X VELOCITY, P3 = 17‘U’ parameters listed * ‘U’ parameters calculated **U0 = conduit diameter ID U1 = area (h)*obtain from manufacture

SPECIFICATIONSPower: » dc supply: » 9 to 30 V DC, 8 W max and / or» ac supply: » 100/115/200/230 V ac ± 15%, 50/60 Hz,20 VA maxEnvironmental: » loca

CIRCULAR AREA X VELOCITYhtransducer**** This dimension should be at least 15 cm (6") shorter than the blanking value, P47.** The transducer mu

GULL-WING AREA X VELOCITY, P3 = 18 ‘U’ parameters required * ‘U’ parameters calculated **U0 = channel base width b U4 = area (h)U1 = lower angle al

GULL WING AREA X VELOCITYtransducer *V* The transducer must be above the maximum head by at least the blanking value, P47.7ML19985AB01 OCM III 93

EGG-SHAPED AREA X VELOCITY, P3 = 19 ‘U’ parameters listed * ‘U’ parameters calculated **U0 = top radius R U3 = area (h)U1 = bottom radius rU2 = axi

EGG-SHAPED AREA X VELOCITYtransducer *standpipe *** This dimension should be at least 15 cm (6") shorter than the blanking value, P47.** The t

UNIVERSAL AREA X VELOCITY, P3 = 20Arbitrary area is typically used when the primary element and/or its flow do not fit anyof the primary elements cov

UNIVERSAL AREA X VELOCITYU0 = 8A0 = 0 head, point 1A1 = 0.0 area, point 1A2 = 0.05 head, point 2A3 = 0.03 area, point 2A4 = 0.1 head, point 3A5 = 0.06

7ML19985AB01 OCM III 98

MAINTENANCEThe OCM-3 requires very little maintenance due to its solid-state circuitry. However, aprogram of periodic preventative maintenance should

ERROR CODESError Code Listing1 number underflow2 number overflow3 divide error4 bad argument5 invalid parameter6 system is locked7 head exceeds BS-368