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RISONIC 2000

Ultrasonic Transit T

ime

Flow Measurement

For Closed Conduits

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EXTENSIVE EXPERIENCE INFLOW MEASUREMENT

ACCURATE AND RELIABLE FLOWMETER

◗ The intrinsic accuracy of the flowmeter is the firstcondition to meet customer demands for overallmeasurement accuracy.

◗ Air bubbles and suspended solids often cause pro-blems in signal detection.A state of the art signaldetection method is therefore necessary to avoidsuch problems.

CONDITIONS TO

ACHIEVE ACCURATE

FLOW MEASUREMENT:

KNOWLEDGE OF HYDRAULIC CONDITIONS

Not every location along the pipe is suitable for flowmeasurement. Hydraulic flow conditions affect flowmeasurement to a large extend.Therefore the measu-ring site has to be selected carefully.

PRECISE DETERMINATION OF PIPEGEOMETRY AND TRANSDUCERPOSITIONS

Measurement accuracy is largely influenced by the geometric variables of the measuring point such as thecross-section of the pipe and the exact positions of the transducers.

For that reason determination of those variables as well as precise installation of transducers is of majorimportance.

RISONIC 2000 FLOWMETER

◗ RISONIC 2000 uses very high resolution multipathtransit time measurement and the latest digital proces-sing technology (DSP) to achieve first class measuringaccuracy.

◗ Transducers cause distortion to the fluid flow if theyprotrude into the conduit. RISONIC 2000 compensatesthis effect by means of flow computation based on thetype of transducer used.

◗ Advanced signal analysis (cross-correlation) enablescorrect signal detection and improves measurementreliability, even in the presence of considerable amountsof suspended solids.

PRE-INSTALLATION

Rittmeyer provides services to support customers indetermining:◗ The best location for flow measurement◗ The optimum orientation and arrangement of the

measurement paths

The range of service extends from recommendationsup to extensive engineering.

INSTALLATION SERVICES

Rittmeyer provides both the tools for customerinstallation as well as installation carried out by ourown experienced staff for the highest accuracydemands.

FROM SIMPLE LOW-END TO

SOPHISTICATED HIGH-END

FLOW MEASUREMENT:

RITTMEYER PROVIDES

COMPLETE SOLUTIONS

INSTALLATION

SERVICES

Hydraulic flow conditions have to be considered in orderto achieve the best measurement performance. Optimumselection of measuring site and path arrangement areprerequisites for successful flow measurement.

SIMPLE FLUID FLOW CONDITIONSWhen the flow is free of turbulence as isthe case with long straight runs, a singlepath arrangement is ideal.

SELECTION OF MEASURING SITEBased on the building plans of your facility,our engineering group provides suggestionsfor the best measurement location. For critical applications, computerised velocityprofile simulations are performed to support selection.

SELECTION OF PATH ORIENTATIONAND ARRANGEMENTDepending on the actual hydraulic flow conditions, ourengineering team selects optimum orientation andarrangement for the measuring paths.

DIFFICULT HYDRAULIC FLOWCONDITIONSIf there are any cones, necks, elbows, vanesor pumps adjacent to the planned locationfor flow measurement a disturbed flowdistribution is to be expected.To meet accu-racy requirements under these conditionsoptimum path orientation and arrangementare indispensable.

Single path arrangement Multipatharrangement

Multipath arrangementwith crossed paths

ENGINEERING

Careful installation of transducers at theoretically defi-ned positions, precise determination of pipe cross-sec-tion and determination of final positions of installedtransducers are the key to first class measurementaccuracy.

CUSTOMER TRANSDUCERINSTALLATIONFor customer installation of transdu-cers, Rittmeyer offers a wide range of different marking and installation tools.Please refer to the recommendations on installation methods and tools overleaf.

PIPE GEOMETRY COMPENSATIONRittmeyer apply OWICS (Optimal WeightedIntegration for Circular Sections) developedby the Swiss Federal Institute of Techno-logy, to compensate for pipe geometrydeviations.

HIGH PRECISION INSTALLATIONFor highest possible accuracy demands,Rittmeyer recommends high precisioninstallation by our experienced staff using atheodolite with integrated interferometerfor distance measurement and laser poin-ter accessory.

Installation Services◗ Determination of pipe cross-section

◗ Installation of transducers

◗ Determination of final positions ofinstalled transducers for use in flowcomputation

◗ Configuration of flowmeter

Levelling Set

max. 300 m

RISONIC 2000 TRANSIT TIME FLOWMETER OF THE LATEST GENERATION

MULTIPLE PIPE MEASUREMENT

SINGLE AND MULTIPATH MEASUREMENT◗ From single to highly sophisticated

8-path flow measurement

◗ Different path arrangements including4 and 8-path measurements accordingto IEC 41 (ASME PTC 18)

PIPE DIAMETERS◗ From 250 to 14 000 mm (10” to 550”)

◗ Wide range of transducers

EASY-TO-USE FLOWMETERUser friendly configuration and operation by means of:

◗ Integrated user interface- large illuminated LC display- pull-down menu- alphanumeric keyboard- cursors

◗ RS-232 interface together with remote configuration software for use with PCand/or Laptop

APPLICATIONS◗ Hydroelectric power

◗ Water supply

◗ Irrigation

◗ Drainage

◗ Water cooling systems

ADVANTAGESof multipath transit time technology are:

◗ High accuracy

◗ Suitable for difficult hydraulicconditions

◗ No head loss through meteringsection

◗ Bi-directional flow

◗ Reverse flow calculation

◗ No “re-calibration” required

◗ Independent of liquid conductivi-ty and temperature

◗ High reliability and repeatability

◗ No moving parts - no maintenance required

1E1P

1E2P

1E4P 2E8P

2E4P

2E2P

Accuracy up to 0.5% of reading (depending on hydraulic flow conditions and accuracy of geometric variables of measuring site)

Number of ultrasonic paths single to 8 paths in a variety of path arrangements including IEC 41( ASME PTC 18) for 4 and 8 paths

Number of pipes 1 to 4 Pipe diameters 250 to 14000 mm (10” to 550”)Range of velocity ± 20 m/s (65 ft/s)Distance electronics to transducers max. 300 m (980 ft)Interfaces 1 analog output: 4 - 20 mA

4 relays: OK, forward/backward indication, 2 relays for impulse or limit outputRS-232: for remote configuration by PC and/or Laptop

Optional interfaces max. 4 slots for following interface modules:- analog output module: 2 outputs 4 - 20 mA- relay module: 3 relay outputs with isolated change-over contacts:

AC: 8 A / 250 V max. 2000 VADC: 8 A / 250 V max. 50 W

Power requirements 115/230 VAC / 45 - 65 Hz24 - 48 VDC

Power dissipation AC ≤50 VA / DC ≤35 WOvervoltage protection built-inEnclosure protection IP 65 (NEMA 4)Enclosure dimensions (h, w, d) 400 x 300 x 210 mm (15.7” x 11.8” x 8.3”)Weight 12 kg (26.5 lb)

Pipe Diameter Path Arrangements Installation by

1E1P, 2E2P Customer*250 to 1000 mm 1E2P, 2E4P(10” to 40”) 1E4P Surveyor or

2E8P Rittmeyer1E1P, 2E2P Customer*

1000 to 2500 mm 1E2P, 2E4P(40” to 100”) 1E4P Surveyor or

2E8P Rittmeyer>2500 mm any Surveyor or(>100”) Rittmeyer

This product concurs with the authoritative terms of the EU and it is marked with the CE-label.

TECHNICAL DATA

* for installation accessories please request data sheets

For further information please request brochures for our closed conduit transducers.

INSTALLATION METHODS AND TOOLS

TRANSDUCERS

Path Arrangements

Certified Quality System

ISO 9001Reg. No. 11568

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