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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...

Page 3 - iii; Specific Model Information; Instrument Serial Number:

Dissolved Oxygen Controller Teledyne Analytical Instruments iii Specific Model Information Instrument Serial Number: _______________________ Instrument Range: _______________ Calibrated for: _______________

Page 4 - iv; Safety Messages; GENERAL WARNING/CAUTION; Technician Symbol; No

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. ...

Page 5 - This manual provides information designed to guide you through

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 instal...

Page 6 - Table of Contents

LXT-220 DO Teledyne Analytical Instruments vi Table of Contents List of Figures.............................................................................. ix List of Tables ................................................................................ x Introduction ...............................

Page 7 - vii; Routine Maintenance

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 Configu...

Page 8 - viii; A.4 Model Designation

LXT-220 DO Teledyne Analytical Instruments viii A.4 Model Designation 55 Index ............................................................................................ 59

Page 9 - ix; List of Figures

Dissolved Oxygen Controller Teledyne Analytical Instruments ix 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 .............................

Page 10 - List of Tables

LXT-220 DO Teledyne Analytical Instruments x List of Tables Table 3-1: Protection Level Exceptions......................................... 33 Table 4-1: Troubleshooting ........................................................... 52

Page 11 - xi

Dissolved Oxygen Controller Teledyne Analytical Instruments xi This is a general purpose instrument designed for liquid measurements in a non-hazardous area. It is the customer's responsibility to ensure safety especially when hot or flammable liquids are being analyzed since the potential of leaks ...

Page 12 - xii

Page 13 - Introduction

Dissolved Oxygen Controller Introduction Teledyne Analytical Instruments 13 Introduction 1.1 Overview Teledyne’s Model LXT-220 Dissolved Oxygen Controller is a robust and versatile instrument for the measurement and process control of dissolved oxygen in a liquid component. Highly customizable, the ...

Page 14 - Main Features of the Transmitter

Introduction LXT-220 DO Teledyne Analytical Instruments 14 The LXT-220 can be upgraded with pre-pHault Diagnostics & HART Communications option which alerts the operator to a pending DO, pH, ORP, or ISE electrode failure. The LXT-220 is housed in a rugged NEMA-4X housing with all operator switch...

Page 15 - Note: These isolated outputs are floating and require an external

Dissolved Oxygen Controller Introduction Teledyne Analytical Instruments 15 • PID Output: An optional PID output is available and provides a 4-20 mA, three-mode control signal. Proportional band is adjustable from 0.1 to 1,000%. Reset and Rate are adjustable from 0.00 to 100 repeats per minute and 0...

Page 16 - horizontal; both horizontal; vertical

Introduction LXT-220 DO Teledyne Analytical Instruments 16 1.4 Front Panel The operator interfaces with the instrument from the front panel. Figure 1-1 shows a standard single channel LXT-220 DO instrument front panel. The panel includes the LCD display capable of outputting information in both a te...

Page 17 - Internal Connections

Dissolved Oxygen Controller Introduction Teledyne Analytical Instruments 17 1.5 Internal Connections All user connections are made inside the unit on removable terminal blocks. Two conduit holes are provided on the NEMA-4X housing, one for low level DC signal and the other for 115VAC power wiring. A...

Page 19 - Installation; Unpacking the Instrument

Dissolved Oxygen Controller Installation Teledyne Analytical Instruments 19 Installation Installation of the LXT-220 Controller involves: • Unpacking the instrument • Mounting • Making Electrical Connections • Configuring the Instrument • Calibration 2.1 Unpacking the Instrument The LXT-220 Controll...

Page 20 - Electrical Connections

Installation LXT-220 DO Teledyne Analytical Instruments 20 • Handrail mounting plate • Panel mounting configurations. U-bolts may be ordered separately. Refer to the following application drawings for mounting details: 4024011 Dimensions, wall & pipe mounting. The unit is supplied with a univers...

Page 21 - unit is available as an option.; CAUTION: MAKE SURE THE CIRCUIT BREAKER PROTECTING

Dissolved Oxygen Controller Installation Teledyne Analytical Instruments 21 2.3.1 AC Power The LXT-220 requires a 115 VAC 60 Hz power source. A 24VDC unit is available as an option. CAUTION: MAKE SURE THE CIRCUIT BREAKER PROTECTING THE AC INPUT LINE IS OFF BEFORE WIRING THE LXT-220. Application draw...

Page 22 - The LXT-220 Controller is used for measurement and control for a

Installation LXT-220 DO Teledyne Analytical Instruments 22 illustrates the proper sensor wiring and is also shown on the affixed label on the backside of the front panel. 2.4 Configuring the LXT-220 The LXT-220 Controller is used for measurement and control for a wide range of liquid analytical appl...

Page 23 - Operation; Using the Front Panel Keys; Note: Simultaneous pressing both vertical keys or any; both

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 23 Operation No one instrument has all the options described in this document. Some options must be specified at the time the instrument is purchased, and are not field-alterable. The instrument can be returned to the factory for ...

Page 25 - There may be additional menus not shown in Figure 3-1 depending; Contrast

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 25 There may be additional menus not shown in Figure 3-1 depending on the options you selected. Figure 3-1: Available Menus and Submenus In this manual, screens with a gray background are related to dissolved oxygen measurement or...

Page 26 - This menu appears after the copyright display when power is first

Operation LXT-220 DO Teledyne Analytical Instruments 26 2 DO 8.40 84.0% 25.0 O C 1 DO 9.28 92.8% 25.0 O C Main Menu, pH 2 ORP 500 50.0% 25.0 O C Main Menu, ORP Procedure: 1. Press the upper MENU SELECTION key to reach the Contrast Menu. 2. Press both horizontal CALIBRATE keys simultaneously to enter...

Page 27 - Calibration

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 27 1 DO .00 ppm Cal .0 mV Zero Calibration Menu DO 3.2.4 Parameter Selection Menu This menu allows you to select what function you would like to perform. With the cursor on BUFFER, if you press ◄ and ► together the LXT-220 will en...

Page 28 - Plot; Configuring the LXT-220

Operation LXT-220 DO Teledyne Analytical Instruments 28 4mA1 .00 ppm 20mA1 10.00 ppm (now 18.84 ma) (ch1 PV) Current output menu Plot 4-20 1 Sample .1 m (ch1 PV) Current output menu 3.2.4.2 S ETUP S UBMENU Choosing SETUP from the Parameter Selection Menu brings up the first of a series of screens th...

Page 29 - Relay on/off set points are adjusted in this menu. The top line; This menu allows the user to view the time of day clock and the

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 29 1 On > 10.00 ppm 1. Off < 9.85 ppm (ch1 PV) Relay set up menu DO Locus -17.0 O C Electrode Data menu ORP Noise filter 10 Electrode Data menu ORP 3.2.4.2.2 R ELAY C ONTACTS Relay on/off set points are adjusted in this menu...

Page 30 - Exit

Operation LXT-220 DO Teledyne Analytical Instruments 30 Fri 12:00:37 (volatile) Time of day clock Input -150.4 mVa 0 mV .00ppm Electrode Data menu ORP  Exit  Stay Exit / Stay menu 3.2.4.4 E XIT /S TAY M ENU This menu confirms that the user wishes to leave the section that they are currently in. Th...

Page 31 - the

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 31 INPUT A/D CONVERTER TRIM Some instruments have two channels measuring two unrelated quantities, and in those cases both channels can be configured from the same configuration menus. Depending on options selected 2 additional su...

Page 32 - Figure 3-2: Numerical Entry Using Front Panel Keys; Operate password level:

Operation LXT-220 DO Teledyne Analytical Instruments 32 Figure 3-2: Numerical Entry Using Front Panel Keys After successfully entering the operational password it remains valid for 60 seconds after exiting the calibration mode on that display. During that time a second display can be accessed withou...

Page 33 - level

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 33 The protection level for the operational displays is the number on the left side of the second line. None of the operational displays are password protected if the protection level is 0. If it is not zero then, with the excepti...

Page 34 - Note: A new password will not be accepted unless the protection; Note: A new configure password will not be accepted unless the; Config password level:

Operation LXT-220 DO Teledyne Analytical Instruments 34 Press both (CALIBRATE) ◄ / ► keys again to enter a new operational password. 1 to 8 digits may he entered. Press either of the menu keys to accept the new password when done. Note: A new password will not be accepted unless the protection level...

Page 35 - Note: The LXT-220 has been configured at the factory for your

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 35 The configuration password is rarely used and the configuration settings are more sensitive, so the password should use more digits than the operational password. With eight base 4 digits the odds of breaking the code in three ...

Page 36 - Manual Mode Assignment

Operation LXT-220 DO Teledyne Analytical Instruments 36 cyclic. Use either of the MENU SELECT ▲ / ▼ keys to accept the selection and move the cursor back to the left. The displayed selection remains in effect until changed and the selection is remembered through power outages of indefinite length. U...

Page 37 - CALIBRATE

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 37 output field for each channel. The manual mode assignment allows the percent output display to be associated with any of the 4-20 outputs, in-cluding the HART output. When in the manual mode the 4-20 output is controlled from t...

Page 39 - The next three displays assign the second, third, and fourth

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 39 HART analog 2:, HART analog 3:, HART analog 4: The next three displays assign the second, third, and fourth variables. The assignments are changed in the same way as for the 4-20 outputs. See Section 3.3.2 4-20mA Output Assignm...

Page 40 - Assignments

Operation LXT-220 DO Teledyne Analytical Instruments 40 Trim O C .0 Unit 25.0 O C Temperature Calibration If the 4-20 selected for the HART analog output is assigned to “missing” or “unused” then the digital representation of the output current will be “not a number”, but with up to four digital var...

Page 42 - The next display is for trimming the 20 mA point of output #1 and

Operation LXT-220 DO Teledyne Analytical Instruments 42 1 in gain 1.0000 400.0 mV Input A/D converter trim The next display is for trimming the 20 mA point of output #1 and it works the same as the 4 mA trim. The 4 mA and 20 mA trims do not interact, and the endpoint trims are linearly interpolated ...

Page 43 - On two channel units the next and last display is for trimming the

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 43 On two channel units the next and last display is for trimming the channel 2 analog input. 3.3.9 PID Assignments Two independent Proportional Integral Derivative (PID) controllers are available as options on all instruments, in...

Page 44 - A 0% relay setpoint refers to the minimum PID output, which

Operation LXT-220 DO Teledyne Analytical Instruments 44 displays for them in the setup section, and they can be used for alarm purposes or otherwise. The bottom line of the display will identify the relay as being assigned to a PID output, and it will also show what the input to the PID processor is...

Page 45 - Press both horizontal; To release manual output:; Press only the left-hand

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 45 DO 7.80 M 50.0% 25.0 O C Main Menu, DO Procedure: 1. If not at the Main Menu, press the appropriate MENU SELECTION key to reach the Main Menu. 2. Press both horizontal ◄► CALIBRATE keys simultaneously to enter the calibrate mod...

Page 46 - Cal

Operation LXT-220 DO Teledyne Analytical Instruments 46 Buffer S etup Status Parameter Selection Menu 1DO .00 ppm Cal .0 mV Standardization menu pH • BUFFER: Perform a 1 or a 2 point calibration • SETUP: Set up the range of the 4-20 mA output • STATUS: Information only. Shows the data stored from th...

Page 47 - Clean the electrode and insert the sensor into the desired buffer.; When first installing an electrode, the second cal point

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 47 2DO 8.40 ppm Cal -173.8 mV/FS Span calibration menu pH 3. Clean the electrode and insert the sensor into the desired buffer. 4. Press both horizontal CALIBRATE keys simultaneously to enter the calibrate mode. Observe the diagno...

Page 48 - IMPORTANT: If a flashing asterisk appears during or after; Note: Comparing the millivolt values before and after the

Operation LXT-220 DO Teledyne Analytical Instruments 48 3. For diagnostic reasons note the DO and mV/FS values from the prior calibration. 4. Press both horizontal CALIBRATE keys simultaneously to enter the calibrate mode. Observe the diagnostic value on the bottom line becomes a real-time value and...

Page 49 - .00 ppm; If the slope calibration performed in Section 3.4.2.3 is not within; Procedure at the Standardization Menu:

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 49 2 DO 10.0 ppm Cal -157.5 mV/FS Standardization menu @ factory default settings 1 DO .00 ppm Cal .0 mV Standardization menu DO @ factory default settings 4. Immediately before making the calibration adjustment, note the current ...

Page 50 - This procedure is required at BOTH of the calibration points.

Operation LXT-220 DO Teledyne Analytical Instruments 50 3. This procedure is required at BOTH of the calibration points.

Page 51 - Maintenance; Aside from normal cleaning routine maintenance is limited to

Dissolved Oxygen Controller Maintenance Teledyne Analytical Instruments 51 Maintenance 4.1 Routine Maintenance Aside from normal cleaning routine maintenance is limited to recalibration. For recalibration, see Section 3.4 Calibration . However, if service of the internal components is required alway...

Page 52 - SYMPTOM; Air bubble in sensor.

Maintenance LXT-220 DO Teledyne Analytical Instruments 52 Table 4-1: Troubleshooting SYMPTOM POSSIBLE CAUSES SUGGESTED ACTION No power to the instrument. Check power supply to be sure the correct voltage is being supplied to the transmitter. Contrast level is set too low. Set contrast level to a hig...

Page 53 - Appendix; Input Measurement Parameters:

Dissolved Oxygen Controller Appendix Teledyne Analytical Instruments 53 Appendix A.1 Specifications Packaging: NEMA-4X weatherproof enclosure suitable for general purpose application Power Requirements: 115/220 VAC or optionally 24 VDC 0.25A Display: Menu driven Supertwist LCD. Simultaneously displa...

Page 55 - A.2 Model Designation

Dissolved Oxygen Controller Appendix Teledyne Analytical Instruments 55 A.2 Model Designation The standard LXT-220 controller is 110VAC powered unit in a 1/2 DIN, NEMA 4X enclosure. It incorporates a backlit graphics display and a membrane keypad. This instrument requires an external 24VDC to power ...

Page 58 - output must be specified.; Output configuration options:; MA

Appendix LXT-220 DO Teledyne Analytical Instruments 58 output must be specified. Output configuration options: MA 4-20 mA, standard TMP 4-20 mA, Temperature (adjustable -100 to +200°C) PID 4-20 mA, 3 mode control % (ion) mA % concentration for display and 2nd output (Conductivity only) DIAG Sentinel...

Page 59 - Index; See

Dissolved Oxygen Controller Index Teledyne Analytical Instruments 59 Index A to D converter trim, 42 AC power. See power accuracy, 42, 53 address, 55 air, 47 alarm, 13, 15 HI, 13 LO, 13 alarm relay, 40 analog to digital converter, 42 ASSIGN, 35 assigning parameters, 28 assignment conflict, 36, 37 au...