Table of Contents
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Table of Contents
Related Manuals for Sensus OMNI C2
Summary of Contents for Sensus OMNI C2
- Page 1 OMNI and T Meters User Guide WUG-10003-02...
- Page 2 Information in this document is subject to change without notice and does not represent a commitment on the part of Sensus. No part of this publication may be reproduced, transmitted, stored in a retrieval system, or granulated into any language in any form by any means, without the written permission of Sensus.
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Page 3: Table Of Contents
Contents Introduction Specifications OMNI Installation Required Tools Installation Instructions Signal Connections Description Features Application Electrical Connections Measuring Chamber Tools Required Remove the Measuring Chamber Disassemble the Measuring Chamber Exchange the Measuring Insert... - Page 4 Introduction The OMNI family of meters are a technologically advanced set of water meters with no restrictions as to sustained flow rates within its continuous operating range. OMNI meters feature Floating Ball Technology (FBT), which allows the measuring element to operate virtually without friction or wear.
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Page 5: Introduction
Specifications Category Specification Input Power 12-24 VDC ± 10% Output Signal Open Collector—Digital Signal Wiring Red = + Power Supply Voltage Green = Pulse, Switching to Ground Black = Ground (- Power Supply Voltage) Contact Closure Duration 30ms Minimum (at 16Hz Output) Contact Open Duration 30ms Minimum (at 16 Hz Output) Duty Cycle... -
Page 6: Omni Installation
To ensure valid registration, proper performance, and meter longevity, the following factors should be considered when installing Sensus OMNI Meters. 1. When installing Sensus OMNI Meter with the strainer, a minimum of 2-½ pipe diameters of straight run of pipe or equivalent full open components is required upstream and downstream of the meter or strainer flanges. - Page 7 During Meter Use (Optional Flexibility) Ball Valve Smith-Blair Coupling Downstream Upstream Flow Bypass Tee Bypass Tee Sensus OMNI Meter (Shown) Dia. Minimum Dia. Minimum Full-Open Straight Pipe Straight Pipe Gate Valve Recommended Recommended 5. No mechanical stresses should be exerted on the meter when installed in the pipeline.
- Page 8 12. The manufacturer’s normal flow must not be exceeded for extended periods. Applications with questionable water quality should be addressed with Sensus Engineering before meter installations. 13. The meter should be protected from stones, sand, and fibrous material. 14. The meter must be protected from pressure surges.
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Page 9: Signal Connections
The OMNI registers utilize fully solid-state electronics. The OMNI C register outputs a programmable (using Sensus Unipro and OMNI communicators) digital pulse signal suited for interfacing with ACT-PAK instruments and SCADA systems to achieve a 4 to 20 mA output. - Page 10 Illustration 1 OMNI Electronic Switch (MOSFET) Register 12-24 VDC Signal to 12-24 VAC Relay Illustration 1 is used when the OMNI is connected to a PLC (e.g., in a SCADA system). The PLC should not have an internal pull-up resistor in its input circuit (no DC voltage at the instrument inputs).
- Page 11 Illustration 3 OMNI Electronic Switch (MOSFET) Register 6000 Ohm Resistor Ground to Instrument 12-24 VDC (if required) Signal to Instrument by Pull-Up Resistor Illustration 3 is used for instruments without internal pull-up resistors and without optical isolators internal to their inputs. Ground is common for both the OMNI register and instrument.
- Page 12 Illustration 4 OMNI Electronic Switch (MOSFET) Register Ground to Instrument Vsupply (if required) 12-24 VDC Signal to Instrument Vinstrument Vinstrument Vsupply/2 Vsupply/3 6.8k ~Vsupply/8 ------------------- - Vinstrument Vsupply The table and formula are valid under the assumption that the instrument’s input resistance is higher than ...
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Page 13: Measuring Chamber
Tools Required • 2.5, 3, and 6mm hex head ball end drivers (6mm not needed for the R2) • Sensus seal screw tool—for bonnet removal • Open end/box wrenches as determined by size and type of OMNI meter • 7/16”x1/2” open end/box wrench •... -
Page 14: Remove The Measuring Chamber
Remove the Measuring Chamber Chamber Cover Chamber Cover Bolts Bolt Washers (Black nylon washers are below the stainless steel washers). Chamber Cover Measuring Chamber Chamber Cover O-Ring Note: Chamber Bolt quantity varies by meter size. 1. With the service line pressure off, loosen all chamber cover bolts. 2. -
Page 15: Disassemble The Measuring Chamber
Disassemble the Measuring Chamber For C2/F2/T2: Probe Retaining Nut Measuring Chamber... - Page 16 For R2: Probe Retaining Nut Measuring Chamber...
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Page 17: Exchange The Measuring Insert
1. Remove the bonnet seal screw ( ) using the Sensus seal removal tool. 2. Twist the bonnet ( ) counter-clockwise and lift it off the base. 3. Raise the register ( ) off the base, taking care to not strain the pick-up probe wire.
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