Siemens 7ML19985AB01 instruction manual OCM-3 Layout

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OCM-3 LAYOUT

board A

display board

board B

All field wiring must have insulation suitable for at least 250 V.

Hazardous voltage present on transducer terminals during operation.

dc terminals shall be supplied from SELV source in accordance with IEC 1010-1 Annex H.

Relay contact terminals are for use with equipment having no accessible live parts and wiring having insulation suitable for at least 250 V.

The maximum allowable working voltage between adjacent relay contacts shall be 250 V.

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OCM III

7ML19985AB01

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Contents Open channel Unit Repair and Excluded Liability Contact Smpi Technical Publications at the following addressTable of Contents Operation Start UPGeneral Keypad Initial Start Up Fundamental Checks Maintenance Error Codes 100 Communications 101 7ML19985AB01 AppendicesOCM If you want to know about Read Product About thisShort OCM » 20 to 50 C -5 to 122 F Specifications» range 20 or 4-20 mA » resolution IP65 enclosureProgrammer » CE *, FM, CSA NRTL/C Cabling Temperature Sensor Transducer Output » Belden Communication SoftwareAuxiliary Input Outline and Mounting InstallationInstalling the OCM-3 OCM-3 Layout Customer device System DiagramOCM-3 Ground shield at OCM-3 only Basic Wiring Temperature Sensor Installing the TransducerInstalling the Temperature Sensor Ground shield at OCM-3 onlyMA Output RelaysSynchronization DC Power Power ConnectionsAC Power Disconnect power before installing or replacing the battery Installing the Memory BACK-UP BatteryInstalling the Programmer Communicating VIA ComputerKeypad Start UPGeneral Language Initial Start UPOCM-3 is asking which language you prefer to communicate EnglishP0 language English P1 dimensional units Centimeters F13 auto zero calibration 160 Completed 7ML19985AB01114100 Enter new time 114124-hr. time F5 ddmmyyyy date October 12Fundamental Checks OCM Security OperationMemory UnitsAbsolute vs. ratiometric Flow CalculationDisplay = constantFor battery operation, set display lighting to off or auto Damping» 20 mA For battery operation, have relays energizing on alarmExample For relay » P6 * flow rateFlow rate FAIL-SAFEFlow Rate and Totalizing Logging CapacityViewing the data log Time and Date TemperatureBlanking Emulation Mode ResetVoltage Input Current Input Flow Velocity InputAuxiliary Head Input As normal 7ML19985AB01100% head 4 m, enter 5 m Diagnostic AidsDC Output Velocity Security access required‘D’ Parameter Listing Nominal target rangeOCM Keypad to mA output Enter security code Emulation mode‘F’ Parameter Listing OCM = centimetres ‘P’ Parameter ListingLinear Velocity Gallons Flowrate Volume= absolute = ratiometric Flow rate units = imperial million gallons per dayOCM = 4-20 mA = 0-20 mA 7ML19985AB01 OCM OCM Units FixedVariable condition OCM ‘U’ Parameters for P3 Primary Element OCM = constant factor U1 = head U0 = exponent U1 = k factor P4 = 0 onlyReference Typical SHARP-CRESTED Weirs Typical Weir ProfilesKhafagi Venturi Typical Parshall Flume Typical Leopold Lagco ‘U’ parameters required ‘U’ parameters calculated BS-3680 Rectangular Flume = crest width = Cv = crest height = Cd = crest length = a BS-3680 Round Nose Horizontal Crest Weir Cv = velocity coefficient ¤ Refer to Operation \ Flow Calculation 7ML19985AB01BS-3680 Trapezoidal Flume BS-3680 U-Flume, P3 = BS-3680 U-FLUME = crest width = C = crest height = Cp = crest length = head H and p applied to CBS-3680 Finite Crest Weir = gravitational acceleration = Ce x 2⁄3 ⎯⎯√2⎯g x be x he1.5 Where q = flow rate= approach width = Ce = crest width = K b = crest height = crest width He = effective head h + Kh = head Kh = 1 mmBS-3680 Thin Plate Rectangular Weir U0 = notch angle Alpha U1 = Ce BS-3680 Thin Plate V-NOTCH Weir U0 = crest width b Rectangular Weir Contracted Based on the Manning Formula = hydraulic radius = slope of hydraulic gradientRound Pipe U0 = maximum flume width, hmax PALMER-BOWLUS Flume U0 = maximum listed head, hmax Flume Universal Head vs FLOW, P3 = U0 = number of data points n, 4 toFlow, point A17 Head, point A18 Flow, point A13 Head, point A14Flow, point A15 Head, point A16 Flow, point A19U0 = channel width B U1 = area h Rectangular Area X Velocity = head, cm = flow velocity, cm/sec Trapezoidal Area X Velocity = channel top width, cm = head, cm = channel base width, cm = B b/d Where q = flow rate, l/sFor h ≥ d Modified Trapezoidal Area X Velocity U0 = base diameter D U1 = area h Channel Area x Velocity U0 = conduit diameter U1 = area h Circular Area X Velocity GULL-WING Area X VELOCITY, P3 = Gull Wing Area X Velocity EGG-SHAPED Area X VELOCITY, P3 = EGG-SHAPED Area X Velocity Universal Area X VELOCITY, P3 = Typical open channelA10 = Universal Area X VelocityArea Head OCM Maintenance Error Codes Serial printer Customer’sComputer Protocol for the OCM-3 is as follows Baud rate 102Bipolar Current DB-9 connectorDB-25 connector Refer to Cvcc Instruction104 DateP35 = 7, print interval set for 7 minutes 105 Utilities Software Programmer Remote OCM-3 programmingRemote OCM-3 display Local display 106 00.000000 99.12399.123000 7ML19985AB01 Typical OCM-3Display value 107# = 0 through Content of P5 Response109 Start data log down loadStop data log down load Cable DB-25 connector 7ML19985AB01Standard modem Computer Telephone lines Remote modem111 Establishing CommunicationConnect Ending Communication 112Rev