Teledyne 4220 6.6 Preliminary Troubleshooting Steps

4220 Flow Meter

Section 6 Maintenance and Service

6-13

To reset the 4220 software:

1. Press Print Program for a record of your program setup.

2. Turn the flow meter off.

3. Hold down the 4 and Exit Program keys simultaneously.

4. While still pressing th e 4 and Exit Program keys, turn

the flow meter on again. Wait until the display reappears

before releasing the keys.

Pressing 4 and Exit Program may leave some values pro-

grammed into the flow meter's computer. If you want to remove

all programmed entries, hold down 1 and Clear Entry while

powering up the flow meter.

The following messages describe serious internal problems, indi-

cating service is required:

ROM CHECKSUM ERROR - or -

FOUND BAD RAM - CALL CUSTOMER SERVICE

If these messages appear, call the Teledyne Isco Customer

Service Department at (800) 228-4373.

CAUTION

Do not attempt to disassemble or repair the 4220 Flow Meter

(other than changing fuses) unless you are skilled in the evalu-

ation and repair of microprocessor-based circuitry. Teledyne

Isco recommends no attempt be made to disassemble or

repair the printer mechanism or display module.

6.6 Preliminary Troubleshooting Steps

The electronic circuitry of the 4220 is solid-state and its reli-

ability is high. If the unit should fail to operate properly, the

problem is most likely a mechanical failure. Items such as a

broken or intermittent connections in the power cable or wiring

harness or (rarely) poor electrical connection through keypad

switches should be suspected.

6.6.1 If Serious Problems

Occur

If you suspect an electronic problem, Teledyne Isco recommends

that you contact the Teledyne Isco Technical Service

Department. Contact information can be found on the War-

ranty page at the back of this manual. Our Technical Service

Department has trained technicians and specially designed

equipment necessary for timely, efficient repair of the 4220 Flow

Meter. If you still wish to attempt repairs, the Customer Service

Department is available to provide additional advice and infor-

mation on servicing.

Contents

Main Page Foreword Page Page DANGER Hazard Symbols IMPORTANT PLEASE READ WARNING killed. Never Page Table of Contents i Section 1 Introduction Section 2 Programming Section 3 Installation Section 4 Submerged Probe Installation Section 5 Options and Accessories iii Section 6 Maintenance and Service Appendix A Replacement Parts Appendix B Accessories List Appendix C Programming Worksheets iv Appendix D General Safety Procedures Appendix E Material Safety Data Sheets List of Illustrations v List of Tables Page Section 1 Introduction 1.1 Description 1.2 Compatible Equipment 1.3 Operating Principles Page 1.4 Software Upgrades 1.5 Controls, Indicators, and Connectors Page Page 1-7 Table 1-1 Controls, Indicators, and Connectors Controls Settings Function Indicators Reading Function Connector Type Function 4220 Flow Meter 1.6 Technical Specifications Table 1-2 Technical Specifications for the 4220 Flow Meter Physical Specifications 1-9 Flow Conversion Table 1-2 Technical Specifications for the 4220 Flow Meter (Continued) Table 1-3 Technical Specifications for the 3222 Submerged Probe Physical Specifications Level Measurement Specifications 1.7 How to Make Battery Calculations Table 1-5 Battery Life Expectancy Page Page 00I5 + Page Section 2 Programming 2.1 Getting Started Page 2.2 Programming Procedure Page 2.3 Description of Program Steps Page Page Page Page Page 2.4 Interpreting the Program Screens Page Page Page Page Page Page Table 2-1 ASCII Output Codes Table 2-1 ASCII Output Codes (Continued) Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Section 2 Programming 2-41 Figure 2-3 YSI 600 Sonde Calibration Flow Chart Page Page Page Page Page Page Page Page Page Page Page Page Page Section 3 Installation 3.1 Introduction Page 3.2 Connection to a Power Source Page Page Page 3.3 Flow Meter Mounting and Installation Procedures 3.4 Quick-Disconnect Box Page 3.5 Extension Cables 3.6 Safety Considerations 3.7 Isco Sampler Interface Page Section 4 Submerged Probe Installation 4.1 General Mounting Considerations 4.2 Submerged Probe Nose Sections 4.3 Mounting Rings Page Page Page Page Flow Page 4.4 Other Mounting Techniques Table 4-1 Locating the Head-Measuring Point Page Page Page Section 5 Options and Accessories 5.1 4200T Modem Page Page 5.2 Connection to External Serial Device 5.3 4-20 mA Analog Outputs: External and Internal Table 5-1 4-20 mA Output Interface Specifications Table 5-1 4-20 mA Output Interface Specifications 5.4 Tipping Bucket Rain Gauge Table 5-2 Multiple Analog Output Board Specifications 5.5 Isco Flowlink Software 5.6 High-Low Alarm Relay Box DANGER 5.7 Parameter Sensing with Isco 4200 Series Flow Meters 5.8 The Temperature Probe 5.9 The pH Probe Page Page Page Page Page Table 5-3 pH Probe Specifications 5.10 The Dissolved Oxygen (D.O.) Probe Note Page Page Page Table 5-4 D.O. Probe Specifications 5.11 Installation of Parameter Probes in Mounting Rings 5.12 The YSI 600 Multiple Parameter Sonde Table 5-5 YSI 600 Probe Specifications 5.13 Mechanical Totalizer Table 5-5 YSI 600 Probe Specifications (Continued) Section 6 Maintenance and Service 6.1 Routine Maintenance and Minor Service 6.2 Reactivation of the Desiccators Page 6.3 Care of the Submerged Probe and Cables Page Page 6.4 Maintenance of the Printer Page Page 6.5 Servicing And Troubleshooting Page Page 6.6 Preliminary Troubleshooting Steps Page 6.7 Precautions for Servicing CMOS Circuitry 6.8 Using FLASH UPDATE Page Page Page Table 6-1 Minimum DOS and Computer Hardware Requirements Appendix A Replacement Parts Page Page Appendix A Replacement Parts A-4 Table A-1 Replacement Parts List No Part Num ber Complete Part Description Table A-1 Replacement Parts List (Continued) Page Appendix B Accessories List Page Page Page Appendix C Programming Worksheets C.1 Setup Page C.2 Flow Conversion: Level-to-Flow Rate C.3 Parameter to Adjust C.4 Reset Totalizer C.5 Sampler Pacing C.6 Sampler Enable C.7 Alarm Dialout Mode C.8 Printer C.9 Reports/History Page Page Appendix D General Safety Procedures D.1 Practical Safety Precautions Page Page D.2 Lethal Atmospheres in Sewers Page D-6 D.3 Hazardous Gases hazardous gases. Table D-1 Hazardous Gases D-7 D-8 D-9 Page Page E-2 *Optional Indicating Silica Gel Material Safety Data Sheet Buffalo, NY 14224 Section 1 - Material Identification and Information Section 2 - Physical/Chemical Characteristics Section 3 - Fire and Explosion Hazard Data E-3 *Optional Indicating Silica Gel Section 5 - Health Hazard Data Section 6 - Control and Protective Measures Section 7 - Precautions for Safe Handling and Use/Leak Procedures Section 1 Product and Company Information Section 2 Composition / Information on Ingredients Section 3 Hazard Identification E-5 Section 4 First Aid Measures Section 5 Fire Fighting Measures Section 6 Accidental Release Measures Section 7 Handling and Storage E-6 Section 8 Exposure Controls/Personal Protection Component Name Exposure Limits Section 9 Physical and Chemical Properties Section 10 Stability and Reactivity E-7 Section 11 Toxicological Information Section 12 Ecological Information Section 13 Disposal Information Section 14 Transportation Information Section 15 Regulatory Information Section 16 Other Information Index-1 Index Numerics A B C P Q R S T DECLARATION OF CONFORMITY Page CE Declaration of Conformity DECLARATION OF CONFORMITY Page Teledyne Isco One Year Limited Factory Service Warranty *