ROHRBACK COSASCO SYSTEMS CORRATER 9020 Uživatelský manuál

Model E-9020 Corrater® Digital Transmitter Rohrback Cosasco Systems 11841 East Smith Ave. Santa Fe Springs, CA 90670 Tel

Chapter 3 6 Transmitter Enclosure The Corrater transmitter enclosure is explosion-proof (flame-proof), and is sealed with an O-ring so as to be

Installation 7 The transmitter connects to the probe directly via the probe-connecting adapter. If necessary, a special extension cable of no mor

Chapter 3 8 Transmitter Connections The System connections to the transmitter are as follows: Connector Color Pairs Description A Black 0 VDC

Installation 9 Figure 6 DIP Switches

Chapter 3 10 The Transmitter addresses are set by DIP switches 1 to 5 DIP 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5Address 0 8 16 24 ON * * * *

Installation 11 Maximum Number of Transmitters with 24 VDC Supply Cable Length Wire Gauge 300 m 600 m 900 m 1200 m AWG Dia (in) 1000 ft 2000

Chapter 3 12 The terminal blocks in the junction boxes should be 10 way with adjacent pairs linked. This allows a single wire to be inserted into

Installation 13 RS 485 Drivers and Converters The transmission is two-wire RS 485 on all units (computer and Corrater transmitters), so that they

Chapter 4 14 Chapter 4 Operation The Corrater transmitter is normally used with a corrosion computer running either Microcor and Corrater Tools so

Communications Protocol 15Appendix A Communications Protocol The Corrater transmitter has a digital communications over a two-wire RS 485 bus. The

© 2005 Rohrback Cosasco Systems, Inc. All rights reserved. CORRATER and MICROCOR are registered trademarks of Rohrback Cosasco Systems, Inc. No

Appendix A 16 Data Response from Slave Data response from the requested transmitter is a seven byte ASCII response of a +/- sign and six digits.

Communications Protocol 17Error -999,998 and –999,997 will occur if the transmitter is unable to get a reading from the probe due to an open circui

18 Appendix B ATEX Certifications

Certification 19

Appendix B 20

21 Appendix C Troubleshooting Procedure What to do in case of no response from the transmitter: Use HyperTerminal to test communication between th

Appendix C 22 Appendix D Theory of Operation of CORRATER Systems CORRATER® systems measure the instantaneous corrosion rate of a metal in a con

23 capacitance). Figure A-1 is an equivalent electrical circuit of the corrosion cell formed by the measuring electrodes and the fluid, showing the

Appendix C 24 Figure A-2 Typical LPR Current vs. Time Decay Curve Solution resistance can also have a significant effect on a

25 Figure A-3 Operating Range of LPR Instruments Corrosion Rate vs. Solution Conductivity Several techniques have been used over the years to mi

Table of Contents Chapter 1 Introduction………………………………………….. 1 Chapter 2 Specification…………………………………………. 3 Chapter 3 Installation……………………………………

Appendix C 26 Figure A-4 Rohrback Cosasco 3-Electrode Probe Configuration A better way to deal with this problem, however, i

27 3.2.10 A two-electrode probe with electrochemical impedance measurement technique at high frequency short circuits the double-layer capacitance,

1 Chapter 1 Introduction NOTE: Your Corrater® E-9020 Transmitter was carefully tested, inspected and packaged prior to shipment. Before unpack

Chapter 1 2 The transmitter must be relatively close-coupled to the probe in order to achieve this improved performance. This is achieved by direc

3 Chapter 2 Specification Corrater® Transmitter Model E-9020 • Enclosure NEMA 7 and IP 66/ NEMA 4X • Weight 3.5 lbs (1.6 Kg) • Dimensions

Chapter 2 4 • Operating Range: • Multiplier Range: 0.2 to 2.99 • Probe Compatibility: 2 or 3 Electrode CORRATER® probe • Meas

5 Chapter 3 Installation The E-9020 is intended to be used with any standard 2-electrode CORRATER® probes. Three electrode probes can also be use