Teledyne 3020 Operating instructions

3020 Submerged Probe
Flow Transmitter
Installation and Operation Guide
Part #60-3403-061 of Assembly #60-3404-058
Copyright © 1990. All rights reserved, Teledyne Isco
Revision P, February 2012

Foreword
This instruction manual is designed to help you gain a thorough understanding of the
operation of the equipment. Teledyne Isco recommends that you read this manual
completely before placing the equipment in service.
Although Teledyne Isco designs reliability into all equipment, there is always the possi-
bility of a malfunction. This manual may help in diagnosing and repairing the malfunc-
tion.
If the problem persists, call or e-mail the Teledyne Isco Technical Service Department
for assistance. Simple difficulties can often be diagnosed over the phone.
If it is necessary to return the equipment to the factory for service, please follow the
shipping instructions provided by the Customer Service Department, including the
use of the Return Authorization Number specified. Be sure to include a note
describing the malfunction. This will aid in the prompt repair and return of the
equipment.
Teledyne Isco welcomes suggestions that would improve the information presented in
this manual or enhance the operation of the equipment itself.
Teledyne Isco is continually improving its products and reserves the right to
change product specifications, replacement parts, schematics, and instruc-
tions without notice.
Contact Information
Customer Service
Phone: [phone] (USA, Canada, Mexico)
[phone] (Outside North America)
Fax: [phone]
Email: [email protected]om
Technical Support
Phone: [phone] (Analytical)
[phone] (Samplers and Flow Meters)
Email: [e-mail]
Return equipment to: 4700 Superior Street, Lincoln, NE 68504-1398
Other Correspondence
Mail to: P.O. Box 82531, Lincoln, NE 68501-2531
Email: [email protected]
Web site: www.isco.com
Revised March 17, 2009

i
3020 Flow Transmitter
Table of Contents
Section 1 Introduction
1.1 Manual Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.3 Associated Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.4 The Submerged Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.5 Labels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.6 Controls, Indicators, and Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.7 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Section 2 Operation and Programming
2.1 Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1.1 3020 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1.2 The Submerged Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1.3 Transducer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.1.4 Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2 Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2.1 Keypad Layout and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.2.3 Power Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.3 Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.3.1 Programming Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.3.2 List of Program Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.3.3 Description of Program Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
2.3.4 Equations Used in Flow Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2.3.5 Default Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2.4 Programming Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
2.4.1 Programming for a Parshall Flume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
2.4.2 Programming for a Cipolletti Weir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
2.4.3 Programming with the Equation (Device #34) . . . . . . . . . . . . . . . . . . . . . . 2-19
2.4.4 Programming Example Using an Equation . . . . . . . . . . . . . . . . . . . . . . . . 2-20
2.4.5 Rectangular Weirs with End Contractions . . . . . . . . . . . . . . . . . . . . . . . . 2-23
2.4.6 Programming Example for a Rectangular Weir with End Contractions . 2-25
Section 3 Installation
3.1 General Comments on Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1.1 Avoid Possibility of Submersion and Installation in Unsecured Locations 3-1
3.1.2 Location of the Flow Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.1.3 Portable Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2 General Wiring Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2.1 Mounting and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2.2 Stahlin Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.2.3 Connection to a Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.2.4 Voltage Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3.2.5 Wiring the Submerged Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3.2.6 Distances Up to 75 Feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.3 Using the Quick-Disconnect Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

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3.3.1 Reference Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.3.2 Mounting the Quick-Disconnect Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.3.3 Preparing Shielded Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
3.3.4 Connecting the Level Sensor Cable to the QD Box . . . . . . . . . . . . . . . . . . . 3-7
3.3.5 Connecting the Cable from the QD Box to the 3020 . . . . . . . . . . . . . . . . . . 3-7
3.4 Connection to a Sampler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
3.4.1 Sampler Located Within 22 Feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
3.4.2 Sampler Located Over 22 Feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
3.4.3 Connection to a Non-Isco Sampler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
3.5 Connection to Other Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.6 Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.7 Installing the Submerged Probe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.8 General Mounting Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.8.1 Functionality Under Solids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
3.8.2 Minimum Reliable Detection Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
3.9 Submerged Probe Nose Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
3.9.1 Attaching the Nose Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
3.10 Circular Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
3.10.1 Spring Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
3.10.2 Scissors Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
3.11 Other Mounting Techniques. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
3.11.1 Rectangular and Trapezoidal Channels . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
3.11.2 Stilling Wells or Streams with Very Low Velocity . . . . . . . . . . . . . . . . . . 3-17
3.11.3 Securing Probe with a Weighted Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
3.11.4 Weirs and Flumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
3.12 Completing the Probe Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Section 4 Options and Accessories
4.1 High-Low Alarm Relay Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1.1 Setting the Limit Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.1.2 Installation of the Alarm Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.1.3 Wiring the Alarm Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4.2 Connection to External Serial Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4.3 Remote Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
4.3.1 Wiring the Remote Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
4.4 Extension Cables for the Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
4.5 Quick-Disconnect Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
4.6 Model 2410 Circular Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
4.6.1 Wiring the 2410 Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Section 5 Maintenance and Troubleshooting
5.1 Care of the Flow Transmitter Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1.1 Case Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1.2 Preventing Moisture Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2 Regenerating the Desiccant Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.2.1 Determining Condition of Desiccant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.2.2 Identify Desiccant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.2.3 Regeneration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.3 Care of the Submerged Probe and Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.3.1 Low Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.3.2 Cleaning the Submerged Probe Without Disassembly . . . . . . . . . . . . . . . . 5-4
5.3.3 Disassembling the Probe for Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.3.4 Cable Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
5.4 Mechanical and Electrical Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.4.1 Accessing the Terminal PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.4.2 Accessing the Flow Transmitter PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

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5.4.3 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
5.5 Display Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
5.5.1 Software Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
5.6 Hints on Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
5.7 If Serious Problems Occur . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
5.7.1 Preliminary Troubleshooting Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
5.7.2 Precautions for Servicing AC-Powered Equipment . . . . . . . . . . . . . . . . . . 5-10
5.7.3 Precautions for Servicing CMOS Circuitry . . . . . . . . . . . . . . . . . . . . . . . . 5-11
5.7.4 Call for Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
5.8 Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
5.8.1 Terminal Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
5.8.2 CPU Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Appendix A Replacement Parts and Accessories
A.1 Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A.2 Accessories and Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
Appendix B Programming Worksheets
Appendix C General Safety Procedures
C.1 Practical Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
C.2 Lethal Atmospheres in Sewers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
C.3 Hazardous Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
Appendix D Material Safety Data Sheets
D.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
List of Figures
1-1 3020 Flow Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-2 Submerged Probe Level Sensor (shown with standard tip) . . . . . . . . . . . . . . . . . . 1-3
1-3 3020 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1-4 3020 Interior, Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
2-1 Simplified Flowchart Programming Flowchart for the 3020 . . . . . . . . . . . . . . . . . 2-5
3-1 View of Case Latch, Showing Lock Shackle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-2 Stahlin Fittings (Compression Bushings) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3-3 Quick-Disconnect Box (cover removed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3-4 Submerged Probe Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
3-5 Alignment of Grounding Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
3-6 Sensor Installed on a Spring Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
3-7 Spring Ring Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
3-8 Mounting Ring in a Round Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
3-9 Universal Mounting Ring Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
3-10 Isco Rectangular Mounting Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
3-11 Typical Primary Device Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
4-1 High-Low Alarm Relay Box (cover removed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4-2 Interconnection of 3020 and Alarm Boxe(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4-3 Remote Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
5-1 Warning Disk Inside Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
5-2 Alignment of Grounding Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
5-3 Aluminum Cover and Interconnect Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5-4 Circuit Board with Aluminum Cover Removed . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5-5 Component Layout of the CPU PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

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5-6 Component Layout of the Terminal Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
List of Tables
1-1 3020 Controls, Indicators, and Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1-2 3020 Flow Transmitter Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1-3 3222 Submerged Probe Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
2-1 Equations Used in the 3020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2-2 Values of N1 for Flow Rate in CFS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
2-3 Values of N2 for Flow Rate in CFS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
3-1 Locating the Head-Measuring Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
4-1 3000 Series Wiring Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
C-1 Hazardous Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6

1-1
3020 Flow Transmitter
Section 1 Introduction
The first section of the 3020 instruction manual provides a
general introduction to the flow meter. It includes a brief dis-
cussion of the organization of the manual, an overall description
of the flow transmitter, and technical specifications.
1.1 Manual Organization The purpose of this manual is to provide the user with the infor-
mation necessary to operate, maintain, and service the 3020 Sub-
merged Probe Flow Transmitter. To accomplish this, the manual
is organized into five sections. The first section is a general intro-
duction to the flow transmitter. The second section contains
information on operation, programming the flow transmitter,
and operating examples. The third section provides installation
details. The fourth section describes available options and their
uses. The fifth section contains information on routine mainte-
nance and servicing to assist the user in correcting problems that
may occur.
1.2 Description The 3020, shown in Figure 1-1, uses a submerged probe for level
measurement. The flow transmitter will normally be used with
some type of primary measuring device to measure flow in an
open channel. The 3020 uses level-to-flow rate conversions
derived from stored equations, which cover the vast majority of
open channel flow measurement situations. Also, the user may
enter the coefficients and powers of the flow equation. However,
most standard weirs and flumes are accommodated without the
need for this equation.
Figure 1-1 3020 Flow Transmitter

3020 Flow Transmitter
Section 1 Introduction
1-2
Programming the 3020 is done in two ways:
• Select the number of a choice listed on the flow trans-
mitter front panel label and enter that number on the
keypad
• Enter a numeric value for steps requiring a value be
selected from a given range.
A six-digit LCD (Liquid Crystal Display) prompts the user
through setup, displays the choice for the current programming
step, and displays level and flow rate.
1.3 Associated Equipment The 3020 Flow Transmitter may be used with the following
equipment:
Interfacing
• 3700 and 6700 Series Portable and Refrigerated
Samplers
• GLS Compact Portable Sampler
• Glacier Refrigerated Compact Sampler
• 2410 Circular Chart Recorder
Optional Accessories
•Resettable 7-digit mechanical flow totalizer. (A
non-resettable flow totalizer is a standard feature of the
3020.)
• High-Low Alarm Relay Box
• Extension Cables for the submerged probe in lengths of
25 and 50 feet. (7,6-15,2 m)
• Quick-Disconnect Box
Allows probe installation up to 1000 feet (304,8 m) from
flow transmitter.
• Expansion rings and extension plates for mounting
probe
• Remote Totalizer
• Flow Transmitter-to-Sampler Connect Cable
1.4 The Submerged Probe The submerged probe, used by the 3020 Flow Transmitter as a
level sensor, is shown in Figure 1-2, and is mounted in the flow
stream. It measures liquid level by sensing changes in hydro-
static pressure as level increases or decreases above it. The sub-
merged probe consists of a differential IC (integrated circuit)
pressure transducer mounted inside the probe assembly and a
shielded cable, which connects the submerged probe to an encap-
sulated electronics package containing an amplifier. The probe
body contains several ports which carry the hydrostatic pressure
of the flow stream directly to the transducer surface.
The cable contains not only the power and signal wires, but also
a hollow vent tube which serves to reference the differential port
of the pressure transducer to atmospheric pressure. A ground
wire in the cable keeps the flow transmitter ground and the

3020 Flow Transmitter
Section 1 Introduction
1-3
grounding point of the submerged probe at the same electric
potential. Circuitry inside the 3020 converts pressure changes
sensed by the submerged probe into level and flow rate.
Figure 1-2 Submerged Probe Level Sensor (shown with standard tip)
1.5 Labels Adhesive labels are provided with the 3020 to allow the display
and the mechanical totalizer to express values which are greater
than the number of digits available in the unit. Where extremely
large flow volumes are involved, trailing zeroes may be added to
the display to make more meaningful numbers. Labels for units
of measure are also provided to serve as a visual reminder for
what units of measure the 3020 was programmed.
CAUTION
If the submerged probe is disassembled for cleaning, do not
touch the exposed stainless steel diaphragm inside the probe
with either fingers or instruments. The transducer, mounted
behind the diaphragm in silicone oil, is fragile. The diaphragm
is made from very thin material (0.003” thick). Deforming it
even slightly may cause a permanent offset to be placed on
the transducer, or may damage or break the chip bonding
wires, ruining the transducer. Flush the stainless steel dia-
phragm with gently running water only.
Note
Various accessories for use with the 3020 Flow Transmitter,
such as connect cables, etc., are mentioned throughout this
manual. The part numbers for these items are listed on an
Accessory Parts List, which will be found at the back of the
manual. Part numbers for other equipment may be obtained
from the factory.

3020 Flow Transmitter
Section 1 Introduction
1-4
1.6 Controls, Indicators,
and Terminal Blocks
The controls, indicators, and terminal blocks of the 3020 Flow
Transmitter are listed in Table 1-1, and their functions are
briefly described. Refer to Figure 1-3 for a view of the controls
and indicators, and Figure 1-4 for a view of the connectors.
Figure 1-3 3020 Control Panel

3020 Flow Transmitter
Section 1 Introduction
1-5
Figure 1-4 3020 Interior, Terminal Blocks
TS1 TS2 TS3
Fuse
F1
Table 1-1 3020 Controls, Indicators, and Terminal Blocks
Controls Function
Keypad 22-Key, 6-column matrix. User programs flow
transmitter through series of keystrokes
prompted by messages on the display.
Indicators Function
Display 6-digit, 7-segment liquid crystal display
(LCD). Prompts user through program setup;
displays current menu selections, displays
level.
Terminal Blocks Type Function
Power 3 #8 screws on Block TS1
Large Terminals 1, 2, and 3
Connects 120/240 VAC power to flow trans-
mitter. #1 = Hot. #2 = Ground. #3 = Neutral.
4-20 mA Output 2 #6 Screws on Block TS2
Terminals 4 and 5
Provides standard 4-20 mA current loop out-
put (variable with level or flow rate) to be
used to control compatible equipment such
as a chart recorder or a chlorinator.
Remote Totalizer 2 #6 screws on Block TS2
Terminals 6 and 7
Connects flow transmitter to external
mechanical remote totalizer.

3020 Flow Transmitter
Section 1 Introduction
1-6
1.7 Technical
Specifications
The technical specifications for the 3020 Flow Transmitter and
3222 Submerged Probes are found in Tables 1-2 and 1-3.
2312 Interface 3 #6 screws on Block TS2
Terminals 8 (data), 9 (+), and 10(-)
Originally for connecting the 3020 to the
Model 2312 strip chart plotter (obsolete).
Currently used for connecting to other exter-
nal serial devices or an alarm relay box.
Bottle Number (BLT) 2 #6 screws on Block TS2
Terminals 11 (bottle #) and 12 (common)
Provides bottle number input signal to flow
transmitter from an Isco automatic wastewa-
ter sampler.
Event Mark 2 #6 screws on Block TS 2
Terminal 13: +12 VDC
Terminal 14: Event Mark
Provides Event Mark input signal to flow
transmitter from an Isco Wastewater Sam-
pler.
Sampler Output 2 #6 screws on Block TS3
Terminal 15:
Terminal 16:
Provides flow pulse from flow transmitter to
enable/flow pace an Isco sampler.
Submerged Probe
Level Sensor
4 #6 screws on Block TS3
Terminal 20: + In (white)
Terminal 21: - In (black)
Terminal 22: + 12V (red)
Terminal 23: - (green and shield)
Provides connection for submerged probe.
The probe reference port requires venting to
atmospheric pressure either at flow transmit-
ter or quick-disconnect box.Connects sub-
merged probe to flow transmitter.
Table 1-1 3020 Controls, Indicators, and Terminal Blocks (Continued)
Table 1-2 3020 Flow Transmitter Technical Specifications
Size (Height x Width x Depth) 151/4” x 105/8” x 73/8
(38.7 cm x 27 cm x 18.7 cm)
Weight 10 pounds (4.5 kg)
Material High-impact molded polystyrene structural foam.
Type Self-certified NEMA 4X enclosure.
Power 104-127 VAC, 0.075 Amp., 50 - 60 Hz
Overcurrent Protection 1/2Amp. slow-blow fuse
Display Type 6 character, 7 segment, alphanumeric backlit liquid crystal.
Display Modes Level, flow rate, and alternate between level and flow rate.
Built-in Level-to-Flow Rate Conversions Weirs: V-notch, Rectangular with and without end contractions, Cipolletti.
Flumes: Parshall, Palmer-Bowlus, Trapezoidal, “H”.
Equation: Two term power equation.
Level-to-Flow Conversion Accuracy 1% of full scale
Sampler Output Isolated contact closure, rated 1 Amp. at 48 VDC.
Sampler Input Event marks, bottle numbers.
Analog Output Isolated 4-20 mA into 0 to 1,000 ohms; level or flow rate, with or without
sampler event marks. Accuracy: 1% of full scale.
Serial Data Port Compatible with Isco Model 2312 Plotter (no longer sold) and High-Low
Alarm Relay Box.
Compatible Isco Recording Device 2410 Circular Chart Recorder, 2312 Plotter (no longer sold)
Totalizer 7 digit mechanical counter, non-resettable
}Sampler Out

3020 Flow Transmitter
Section 1 Introduction
1-7
External Totalizer Output 12 VDC pulse
Operating Temperature - 20° F to 140° F (- 30°C to 65° C)
Storage Temperature - 50° F to 150° F (- 60° C to 65° C)
Table 1-2 3020 Flow Transmitter Technical Specifications (Continued)
Table 1-3 3222 Submerged Probe Technical Specifications
Physical Specifications
Dimensions 78”diameter912" long (2.224.1 cm).
Weight 3 lb (including amplifier box and cable) (1.4 kg).
Body Material CPVC (chlorinated polyvinyl chloride) housing, stainless steel.
Cable Length Standard Sensor: 25 ft. (7.6 m).
Operating Temperature 32° to 160°F (0° to 71°C).
Storage Temperature –40° to 160°F (–40° to 71°C).
Maximum Distances
(between flow meter and level sensor)
Standard Sensor: 75 feet (22.7 m) with optional extension cables.
1,000 feet (305 m) with optional Quick-Disconnect Box.
Level Measurement Specifications
Measurement Range Standard Sensor 0.1 to 10.0 ft. (0.03 to 3.05 meters).
Maximum Level Standard Sensor: 20.0 ft. (6.1 m).
Measurement Accuracy 0.033 to 5.0 ft: ±0.008 ft/ft (0.01 to 1.52 m: ±0.008 m/m)
>5.0 ft: ± 0.012 ft/ft (>1.52 m: ±0.012 m/m)
@ 77° F (25° C). Includes non-linearity, repeatability, and hysteresis, but
does not include temperature coefficient.
Compensated Temperature Range 32° to 122°F (0° to 50° C).
Temperature Error (over compensated
temperature range)
0.1 to 4.0 ft. (0.03 to 1.2 m) ±0.005 ft. per degree F
4.0 to 10.0 ft. (1.2 to 3.1 m) ±0.007 ft. per degree F

3020 Flow Transmitter
Section 1 Introduction
1-8

2-1
3020 Flow Transmitter
Section 2 Operation and Programming
This section of the manual contains detailed information on the
operation, controls and indicators, programming, and set up pro-
cedures for the flow transmitter. Operating examples are also
provided.
2.1 Theory of Operation
2.1.1 3020 Transmitter Following is a description of the overall operating theory of the
flow transmitter. When measuring flow rate, the 3020 is nor-
mally used with a primary measuring device (weir or flume) or
other open channel flow arrangement where a known rela-
tionship exists between level and flow rate. The level measuring
device is a submerged probe which measures the liquid level in
the flow stream. The flow transmitter electronically converts the
level reading into a properly-scaled flow rate value. The flow
transmitter also provides standard flow-related output signals to
be used for:
• Flow-proportional sampler pacing.
• Recording flow rate information on an external
printer/plotter or circular chart recorder.
• Connection to a 4-20 mA compatible device.
The flow transmitter contains microprocessor-controlled circuitry
to make the computations necessary to calculate level and flow
rates from the signals produced by the ultrasonic level sensor,
store programming instructions from the user, and operate the
display. A backlit alphanumeric liquid crystal display (LCD) is
provided both to show level and flow rate information, and to
prompt the user in programming the flow transmitter during
initial set up or subsequent program changes. Other equipment
which may be used with the 3020 connects to the barrier blocks
mounted on the power supply board in the bottom section of the
flow transmitter's case.
2.1.2 The Submerged Probe The submerged probe is mounted in the flow stream and mea-
sures liquid level by changing output in response to changes in
hydrostatic pressure placed on the submerged probe's transducer
by the flow stream. The submerged probe consists of an enclosure
which contains an IC (integrated circuit) differential pressure
transducer. This transducer provides an output signal which
changes proportionally to the pressure placed against it by the
flow stream.

3020 Flow Transmitter
Section 2 Operation and Programming
2-2
2.1.3 Transducer Operation The transducer in the submerged probe contains a resistance
bridge on a thin silicon diaphragm. Pressure against one side of
this diaphragm causes it to flex slightly. This flexing causes the
resistors on one side of the bridge to stretch slightly, while the
resistors on the other side of the bridge compress slightly. The
result is an unbalance in the current across the bridge, which is
proportional to the increase of hydrostatic pressure caused by an
increase in level of the flow stream. This bridge is fed from a con-
stant-voltage source, therefore, the output voltage changes.
2.1.4 Amplifier The output from the transducer is quite low and the impedance
is high, so an amplifier is provided to boost the signal so that it
will still be usable by the flow transmitter even when extension
cables are used with the transducer. This amplifier is encapsu-
lated in the plastic box mounted near the connector end of the
submerged probe's cable.
2.2 Controls and
Indicators
The controls of the 3020 Flow Transmitter are shown in Figure
1-3. The operation and use of the keypad are described in detail
in the following sections. Access to the keypad is possible only
when the door is opened. The LCD and totalizer are visible
through the window in the front door of the cabinet.
2.2.1 Keypad Layout and
Functions
The keypad is mounted in the middle of the left side of the 3020
front panel. It is visible when the cabinet door is closed. The
keypad has 23 keys arranged in six vertical columns. The
function of each key is as follows:
(ARROW DOWN) - This key is used in the LEVEL ADJUST
step of the program; it can be used in place of the number keys to
decrease the level shown on the display.
(ARROW UP) - This key is used in combination with the
display in the LEVEL ADJUST step of the program; it can be
used instead of the number keys to increase the level shown on
the display.
CLEAR ENTRY - This key provides the user with a way to return
to a previous entry of a program step. NOTE: Pressing the key
twice in succession allows the user to exit the program.
.(DECIMAL) - This key is used with the number keys when
entering numeric values into the program.
ENTER/PROGRAM STEP - Pressing this key will allow the user
to enter changes made to the program into memory. To access the
program it is first necessary to press one of the yellow
FUNCTION KEYS. Pressing one of the yellow FUNCTION
KEYS stops the program and allows the user to make changes.
After the change is made and appears on the display, pressing
ENTER/PROGRAM STEP will cause the change to be entered to
the flow transmitter's memory. It is also possible to step through
the program held in memory by pressing this key. The number of
the program step will appear on the left side of the display and
the number of the current selection (or value entered) will be
shown.

3020 Flow Transmitter
Section 2 Operation and Programming
2-3
NUMBER KEYS - The number keys are used to enter numeric
values into the program. They may also be used to make a
selection from the options displayed on the label.
+/- (PLUS OR MINUS) - This key is used to enter positive or neg-
ative numbers when programming an equation.
Yellow FUNCTION KEYS - These keys are used to enter the
program of the 3020 at various points of the programming
sequence so the user may enter or change menu selections or
numerical values. Since these keys are tied to specific pro-
gramming steps of the flow transmitter, they need not be
described individually here. Refer to Section 2.3.3 for the detailed
descriptions of the program steps.
2.2.2 Display The flow transmitter display shows programming choices made
by the user and, after programming and installation are com-
plete, displays the current flow rate and/or level. That is, there
are three operating modes for the display; level, flow rate, or an
alternation between level and flow rate. The display may be
viewed through the window of the flow transmitter's cabinet
when the door is closed. The display is a six digit, seven segment,
backlit liquid crystal. The letter H on the left side of the display
indicates level (or Head). For improved legibility in low light con-
ditions, the LCD is backlit.
2.2.3 Power Failures If there is a power failure, the LCD will go blank and the flow
transmitter will cease operation. Momentary power failures (less
than three seconds) should not affect the operation of the unit, as
power stored in the filter capacitors will provide some carry-over
for a brief period of outage. However, if power is off long enough
for the display to go blank, flow pulses to the sampler will stop,
as will the mechanical totalizer and the totalizer signal sent to
an external 2312 Plotter (if used), which will be reset. The unit
will be unable to recognize changes in level during the time
power is off. However, the program selections made during setup
will be retained, and when power is restored, it will not be nec-
essary to reprogram the flow transmitter. The flow transmitter's
program is stored in memory.
2.3 Programming The 3020 Flow Transmitter is programmed with the aid of the
display. The keypad is used to enter program quantities and to
control certain flow transmitter functions. The display is used to
show selections chosen. (The number of the selected entry will
show on the display.) The display also indicates operational
status, and guides the user through the flow transmitter pro-
gramming sequence by showing the step being programmed.
Each time a key is pressed an audible signal is emitted. Refer to
Figure 2-1 for a simplified flowchart showing the programming
procedure. At the back of this manual is a worksheet on which
program selections may be written.
2.3.1 Programming
Overview
First, the user should remember that the flow transmitter
always has a program stored in memory, even if it is only the
default program installed at the factory. In programming the

3020 Flow Transmitter
Section 2 Operation and Programming
2-4
3020, first select one of the yellow FUNCTION KEYS and press
it. The display will show the step number on the left and the
number of the choice currently selected (or the numerical value
entered for steps requiring a value) on the right. Not all steps
will be used in programming. For example, if there is no remote
plotter, Steps 11-15, which are involved with operation of the
plotter, will be skipped.
The program steps are printed on the flow transmitter label, and
normally programming proceeds in a logical manner, starting
with Step 1, which selects the units used for level measurement,
feet or meters. Step 2 is the selection of the primary measuring
device. Then maximum head, flow rate at maximum head, and
totalizer scaling are selected. If no other equipment is used with
the 3020, only Step 16, DISPLAY OPERATION, and Step 18,
LEVEL ADJUST, must be programmed. Then the LEVEL
ADJUST step is used to calibrate the ultrasonic level sensor.
Programming in Steps 10 through 15 and 17 occurs when the
flow transmitter is used with other equipment. Step 10 governs
the relationship between the flow transmitter and an associated
wastewater sampler. Steps 11 - 15 control the output to an Isco
High-Low Alarm Relay Box (a device to turn equipment on or off
when flow reaches or falls below preset levels), or a 2312. The
2312 is an electro-mechanical printer which records level or flow
information from the 3020 on a strip chart to provide a hard copy
of information measured by the flow transmitter. The 2312
printer is no longer sold by Teledyne Isco.
Step 17 determines the operation of the 4-20 mA current loop
output. Examples of equipment which would be connected to the
4-20 mA current loop are the Isco 2410 Circular Chart Recorder
or process equipment, such as a chlorinator.
If the flow transmitter is already installed and has been pro-
grammed, it is not necessary to completely re-program the unit
to enter any changes. Instead, simply select the yellow
FUNCTION KEY where the change needs to be made and press
ENTER/PROGRAM STEP until the desired step is reached; then
enter the change.
Automatic Program Advance – After the ENTER/PROGRAM
STEP key has been pressed, the display will automatically
advance to the next step and show the current choice or value
entered for that step; the process continues until the user has
made selections for all steps necessary to complete the yellow
FUNCTION KEY selected, or presses the CLEAR ENTRY key
twice to exit the program.
All programming for the 3020 can be done in the shop, except for
the ADJUST LEVEL step, which must be done at the job site.