Teledyne LXT-220 Manuel utilisateur
Teledyne Analytical Instruments
OPERATING INSTRUCTIONS FOR
LXT-220
Dissolved Oxygen
Controller
DANGER
Toxic gases and or flammable liquids may be present in this monitoring system.
Personal protective equipment may be required when servicing this instrument.
Hazardous voltages exist on certain components internally which may persist
for a time even after the power is turned off and disconnected.
Only authorized personnel should conduct maintenance and/or servicing.
Before conducting any maintenance or servicing, consult with authorized
supervisor/manager.
P/N Mxxxxx
ECO:
LXT-220 DO
Teledyne Analytical Instruments ii
Copyright © 2005 Teledyne Instruments/ Analytical Instruments
All Rights Reserved. No part of this manual may be reproduced, transmitted, transcribed,
stored in a retrieval system, or translated into any other language or computer language in
whole or in part, in any form or by any means, whether it be electronic, mechanical,
magnetic, optical, manual, or otherwise, without the prior written consent of Teledyne
Instruments/ Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91749-
1580.
Warranty
This equipment is sold subject to the mutual agreement that it is warranted by us free from
defects of material and of construction, and that our liability shall be limited to replacing or
repairing at our factory (without charge, except for transportation), or at customer plant at
our option, any material or construction in which defects become apparent within one year
from the date of shipment, except in cases where quotations or acknowledgements provide
for a shorter period. Components manufactured by others bear the warranty of their
manufacturer. This warranty does not cover defects caused by wear, accident, misuse,
neglect or repairs other than those performed by TI/AI or an authorized service center. We
assume no liability for direct or indirect damages of any kind and the purchaser by the
acceptance of the equipment will assume all liability for any damage which may result from
its use or misuse.
We reserve the right to employ any suitable material in the manufacture of our apparatus,
and to make any alterations in the dimensions, shape or weight of any parts, in so far as
such alterations do not adversely affect our warranty.
Important Notice
This instrument provides measurement readings to its user, and serves as a tool by which
valuable data can be gathered. The information provided by the instrument may assist the user
in eliminating potential hazards caused by his process; however, it is essential that all
personnel involved in the use of the instrument or its interface, with the process being
measured, be properly trained in the process itself, as well as all instrumentation related to it.
The safety of personnel is ultimately the responsibility of those who control process
conditions. While this instrument may be able to provide early warning of imminent
danger, it has no control over process conditions, and it can be misused. In particular, any
alarm or control systems installed must be tested and understood, both as to how they
operate and as to how they can be defeated. Any safeguards required such as locks, labels,
or redundancy, must be provided by the user or specifically requested of TI/AI at the time
the order is placed.
Therefore, the purchaser must be aware of the hazardous process conditions. The purchaser
is responsible for the training of personnel, for providing hazard warning methods and
instrumentation per the appropriate standards, and for ensuring that hazard warning devices
and instrumentation are maintained and operated properly.
Teledyne Instruments/ Analytical Instruments, the manufacturer of this instrument, cannot
accept responsibility for conditions beyond its knowledge and control. No statement
expressed or implied by this document or any information disseminated by the
manufacturer or its agents, is to be construed as a warranty of adequate safety control under
the user’s process conditions.
Dissolved Oxygen Controller
Teledyne Analytical Instruments iii
Specific Model Information
Instrument Serial Number: _______________________
Instrument Range: _______________
Calibrated for: _______________
LXT-220 DO
Teledyne Analytical Instruments iv
Safety Messages
Your safety and the safety of others is very important. We have
provided many important safety messages in this manual. Please read
these messages carefully.
A safety message alerts you to potential hazards that could hurt you
or others. Each safety message is associated with a safety alert symbol.
These symbols are found in the manual and inside the instrument. The
definition of these symbols is described below:
GENERAL WARNING/CAUTION: Refer to the
instructions for details on the specific danger. These cautions
warn of specific procedures which if not followed could cause
bodily Injury and/or damage the instrument.
CAUTION: HOT SURFACE WARNING: This warning is
specific to heated components within the instrument. Failure
to heed the warning could result in serious burns to skin and
underlying tissue.
WARNING: ELECTRICAL SHOCK HAZARD:Dangerous
voltages appear within this instrument. This warning is
specific to an electrical hazard existing at or nearby the
component or procedure under discussion. Failure to heed this
warning could result in injury and/or death from
electrocution.
Technician Symbol:All operations marked with this symbol
are to be performed by qualified maintenance personnel only.
NOTE: Additional information and comments regarding a
specific component or procedure are highlighted in the form
of a note.
CAUTION: THE ANALYZER SHOULD ONLY BE USED FOR THE
PURPOSE AND IN THE MANNER DESCRIBED IN
THIS MANUAL.
No
Symbol
Dissolved Oxygen Controller
Teledyne Analytical Instruments v
IF YOU USE THE ANALYZER IN A MANNER OTHER
THAN THAT FOR WHICH IT WAS INTENDED,
UNPREDICTABLE BEHAVIOR COULD RESULT
POSSIBLY ACCOMPANIED WITH HAZARDOUS
CONSEQUENCES.
This manual provides information designed to guide you through
the installation, calibration operation and maintenance of your new
process controller. Please read this manual and keep it available.
Occasionally, some instruments are customized for a particular
application or features and/or options added per customer requests.
Please check the front of this manual for any additional information in
the form of an Addendum which discusses specific information,
procedures, cautions and warnings that may be peculiar to your
instrument.
Manuals do get lost. Additional manuals can be obtained from
TI/AI at the address given in the Appendix. Some of our manuals are
available in electronic form via the internet. Please visit our website at:
www.teledyne-ai.com.
LXT-220 DO
Teledyne Analytical Instruments vi
Table of Contents
List of Figures.............................................................................. ix
List of Tables ................................................................................ x
Introduction ................................................................................ 13
1.1 Overview 13
1.2 Main Features of the Transmitter 14
1.3 Optional Features 14
1.4 Front Panel 16
1.5 Internal Connections 17
Installation .................................................................................. 19
2.1 Unpacking the Instrument 19
2.2 Mounting 19
2.3 Electrical Connections 20
2.3.1 AC Power 21
2.3.2 Sensor Wiring 21
2.4 Configuring the LXT-220 22
2.5 Calibration 22
Operation .................................................................................... 23
3.1 Using the Front Panel Keys 23
3.1.1 Menu Selection Keys 23
3.1.2 Calibrate Keys 23
3.2 Menus 24
3.2.1 Contrast 25
3.2.2 Main Menu 26
3.2.3 Output Graph 26
3.2.4 Parameter Selection Menu 27
3.2.4.1 Calibration Submenu 27
Dissolved Oxygen Controller
Teledyne Analytical Instruments vii
3.2.4.2 Setup Submenu 28
3.2.4.3 Status Menu 29
3.2.4.4 Exit/Stay Menu 30
3.3 Configuring the LXT-220 30
3.3.1 Password Protection 31
3.3.1.1 Changing Protection Level 33
3.3.1.2 Changing Operational Password 33
3.3.1.3 Changing Configuration Password 34
3.3.2 4-20 mA Output Assignments 35
3.3.3 Manual Mode Assignment 36
3.3.4 HART Output Assignments 38
3.3.5 Relay Assignments 40
3.3.6 Temperature Calibration 40
3.3.7 4-20 Trim 41
3.3.8 Input A/D Converter Trim 42
3.3.9 PID Assignments 43
3.4 Calibration 44
3.4.1 Manual Output Mode 44
3.4.2 Parameter Selection Menu 45
3.4.2.1 Buffer Menu 46
3.4.2.2 One-Point Buffer Calibration (Standardize) 46
3.4.2.3 Two-Point Buffer Calibration (Span) 47
3.4.2.4 Calibration Using a Grab Sample as a Standard 48
3.4.2.5 Calibration Error Detection & Electrode
Operational Guidelines 49
3.4.2.6 Back-to-Factory Calibration 49
Maintenance ................................................................................51
4.1 Routine Maintenance 51
4.1.1 Cleaning 51
4.1.2 Replacement of the Microprocessor: 51
Appendix .....................................................................................53
A.1 Specifications 53
LXT-220 DO
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A.4 Model Designation 55
Index............................................................................................ 59
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List of Figures
Figure 1-1: LXT-220 Front Panel...................................................16
Figure 1-2: Internal Layout of the LXT-220 DO Controller .............17
Figure 2-1: Opening the Front Panel .............................................20
Figure 2-2: LXT-220 Electrical Connections ..................................21
Figure 3-1: Available Menus and Submenus.................................25
Figure 3-2: Numerical Entry Using Front Panel Keys ....................32
LXT-220 DO
Teledyne Analytical Instruments x
List of Tables
Table 3-1: Protection Level Exceptions......................................... 33
Table 4-1: Troubleshooting........................................................... 52
Table des matières
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