Omega Products FL1651 Installation Manual

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User’s Guide

FL1650 / 1660 SERIES

Industrial Rotameters

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MILLIMETER

WARNING TIGHTEN

ALL

SCREWS BEFORE

OPERATING METER

Servicing North America:

USA: One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford CT 06907-0047

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378 / 1-800-622-BEST

®

Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

®

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico: En Espan˜ ol: [phone]-7803 e-mail: [e-mail]

FAX: [phone] [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LAAmstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Rudé armády 1868, 733 01 Karviná 8

TEL: [phone] FAX: [phone]
Toll Free: 0800-1-66342 e-mail: [e-mail]

France: 9, rue Denis Papin, 78190 Trappes

TEL: [phone] FAX: [phone]
Toll Free in France: 0800-4-06342
e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5EX United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

OMEGAnet®Online Service Internet e-mail

www.omega.com [e-mail]

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that
apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.

TABLE OF CONTENTS

FL-1650/1660

SECTION PAGE

SECTION 1 INTRODUCTION 1

1.1 General Description 1

1.2 Principle of Operation 4

1.3 factors that Affect Operation 4

SECTION 2 INSTALLATION 5

2.1 Unpacking 5

2.2 Installation Considerations 5

2.3 Panel Mounting 6

SECTION 3 OPERATION 8

3.1 Pre-Operational Check 8

3.2 Operating Procedure 8

SECTION 4 MAINTENANCE 9

SECTION 5 SPECIFICATIONS 10

i

SECTION 1 INTRODUCTION

1.1 GENERAL DESCRIPTION

The OMEGA

®

FL1650/1660 Series Rotameters provide high accuracy in a rugged, industrial
housing. Standard construction has brass end fittings for mounting. The meters feature ±2%
full scale accuracy, ±1/2% full scale repeatability, and are shielded for use in pressurized
systems. The rotameters are supplied with arbitrary 10-100% scale, with multiplication
factors for air and water.

1.2 PRINCIPLE OF OPERATION

The operating parts of the flowmeter consist of a tapered glass tube and a float which operates
within the tube. The fluid enters the bottom of the tube, which has the smallest inside diameter
(and smallest area), and exits from the top, which has the largest inside diameter (and largest
area). Refer to Figure 1-1. The float is free to operate between the largest and smallest areas
of the tube.

As the float moves up and down within the tapered tube, the annular area between the float and
tube varies (area increases as the float rises). Refer to Figure 1-2. This gives the generic name
of “variable area meter” for this measurement principle. The pressure differential across the
float (bottom to top) is fixed by the weight of the float and the buoyant forces of the fluid. As the
flow varies, the float will move within the tube until it reaches an equilibrium position, where the
tube taper creates an appropriate annular area to balance the force of gravity and the fluid
forces acting on the float.

Figure 1-1 Principle of Operation Figure 1-2 Cross-section of FL 1650/60 Flow Tubes

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There are four types of floats available for the flowmeter. Refer to figure 1-3. The following
description refers to floats used in the same size tube. The spherical float is the least costly,
however, it has the lowest capacity and offers no viscosity immunity. The RV viscosity
compensating float offers the greatest immunity form viscosity and still greater flow rate. The
RS semi-compensating float gives higher capacity than the RV float, however, it is not as
viscosity compensating. The LJ float offers the maximum capacity available in a given tube
size however, it is less viscosity compensating than the RS float.

Figure 1-3. Float Types

Guide ribs are formed into the tube to keep the float operating in the center of the tube (refer to
Figure 1-2). The guide ribs do not follow the taper of the tube. They are parallel to the tube
centerline so that the proper operating clearance for the float is maintained for its entire range
of travel. As you can see from Figure 1-2, the increasing annular area of the tube is in the area
between the ribs.

A scale is mounted on the flowmeter to enable reading the height of the float above the zero
reference as a percent of full scale. A factor tag is supplied which provides a constant that can
be used to convert readings to actual flow rate units.

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