Water Specialties Propeller Meter Specification OF12D 10"-72" Solid State Electronic Open Flow Meter, Digital Indicator-Totalizer McCrometer, Inc., 3255 W. Stetson Ave., Hemet, CA 92545 Tel: 951-652-6811 Fax: 951-652-3078 Web Site: www.mccrometer.com PREPARED BY: [ENTER COMPANY AND CONTACT INFORMATION HERE] [ENTER ADDRESS] [ENTER CITY, STATE & ZIP] Phone: [ENTER PHONE] FAX: [ENTER FAX] e-mail: [ENTER E-MAIL ADDRESS] METER shall be a velocity propeller type, solid state electronic, sealed housing, open flow meter. It shall comply with the applicable provisions of AWWA, except for the higher standard required in this specification. In the event of conflict, the specification herein shall prevail. The meter shall be a WATER SPECIALTIES ___________ inch MODEL OF12D with a sealed digital indicator having a range of 0 to _________ and shall be equipped with a six digit digital totalizer reading in units of _________ and shall be accurate within ±2% of true flow within a range of _________ to _________ GPM or an approved equal. The meter assembly shall be constructed as follows: METER HEAD shall be bronze and welded to a drop pipe of 2½" O.D. bronze tubing of sufficient strength to meet the length dimension shown on the drawings. GEARBOX shall be bronze. The electronic sensor housed in the gearbox shall be magnetically driven from the propeller ceramic sleeve magnetic and be isolated from the water flow by means of an o-ring sealed housing. This completely eliminates water entering the meter assembly, and eliminates all moving parts except for the propeller. Vertical shafts or flexible cables will not be accepted. PROPELLER shall utilize a water lubricated ceramic sleeve and spindle bearing system. The stainless steel/ceramic spindle on which the propeller is mounted shall be parallel to the direction of the water flow in the pipe. Dual ceramic thrust bearings shall be standard on all meters to handle flows in both the forward and reverse directions. The propeller shall be a conical shaped, three bladed propeller, injection molded of thermoplastic material, resistant to normal water corrosion and deformity due to high flow velocities. DIGITAL INDICATOR-TOTALIZER shall be electronically driven by a sensor output directly from, and proportional to, the rotation of the propeller. The unit shall have a non-volatile memory so total flow will not be lost during battery change or failure. The unit shall be equipped with a 3.6VDC lithium battery which is replaceable. The battery life will be 6 to 10 years. The indicator-totalizer shall continue to function during battery changing. The five digit indicator shall have 0.42" high numbers and a range of 0 to _______ (specify indicator range and units) and eight digit totalizer with 0.27" high numbers reading in units of _______ (specify totalizer units) and is accurate and linear within ±0.25%, of reading, at all points on the scale when operated between -4° and 158° F. The totalizer shall be resettable from the panel or disabled permanently. The unit shall be encapsulated to protect it from moisture, and installed in an O-ring sealed bonnet with padlock hasp. Adapters shall be available to locate the digital indicator-totalizer-transmitter at remote locations up to 100 feet away. MOUNTING BRACKETS shall be bronze and furnished with the meter. The upper brackets shall be complete with locking hasp. The lower bracket shall have guide ears for correct positioning of the drop pipe. PARTS & SERVICE: Supplier must have test facilities, spare parts, personnel to maintain, instruct, train or whatever is necessary to assure meters will be maintained throughout the guarantee period. VOLUMETRIC TESTING of all meters must be performed and approved prior to shipment. The completed meter head assembly will be accuracy tested. The testing will be conducted in accordance to AWWA testing procedure, rates, and volume. The amount of water used to conduct the test shall be left on the totalizer. Prior to shipping, a tag shall be attached to the meter showing the totalizer reading after testing. The test facility must be certified annually to an accuracy of +-0.25% and be traceable to the National Institute of Standards and Technology. If desired, the test can be witnessed by the customer or their selected agent. Certified accuracy test records will be furnished at no charge. ONE MANUFACTURER shall make all meter sizes and styles required for this contract. The meters shall be manufactured and tested in the U.S.A. and shall be of a design in production in the U.S.A. for at least 5 years. ---------- McCrometer, Inc. 3255 W. Stetson Avenue, Hemet, CA 92545 USA Tel (951) 652-6811/Fax (951) 652-3078 www.mccrometer.com Copyright 2001-2007 by McCrometer, Inc./Printed in U.S.A. Lit#30118-41 Rev 11.7/10-07 All printed material should not be changed or altered without permission of McCrometer. The published technical data and instructions are subject to change without notice. Contact your McCrometer representative for current technical data and instructions.