Related Manuals for Teledyne LXT-230
Summary of Contents for Teledyne LXT-230
- Page 1 Model LXT-230 Transmitter Installation and Operating Manual pH and ORP Teledyne Analytical Instruments 16830 Chestnut Street • City of Industry, CA 91748 888-789-8168 • ask_tai@teledyne.com • www.teledyne-ai.com...
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Page 2: Table Of Contents
6.0 CALIBRATION ....................13 6.1 Manual Output Mode..................13 6.2 Contrast Adjustment..................13 6.3 One-Point Buffer Calibration (Standardize) ............13 6.4 Two-Point Buffer Calibration (Span)..............14 6.5 Calibration Using a Grab Sample as a Standard........... 15 Model LXT-230 Instruction Manual / 2... - Page 3 6.8 Output Calibration ................... 15 6.9 Temperature Calibration - Trim Adjustment............16 6.10 Temperature Units Calibration - Celsius/Fahrenheit Conversion ......16 7.0 LXT-230 MODEL NUMBER DESIGNATORS .............. 18 8.0 TROUBLESHOOTING GUIDE................. 19 APPENDIX A - SPECIFICATIONS................. 21 Model LXT-230 Instruction Manual / 3...
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Page 4: Unpacking The Instrument
(see specifications). For customer controllers that are not capable of reverse acting control, the LXT-230 allows the current output to be reversed; for example, a 4-20 mA output for a range of 0-14 pH can be reversed to 14-0 pH. -
Page 5: Pid Output (Optional)
1.10 Three Outputs (Optional) Because temperature is an input on the primary channel, TAI has made it available as a third 4-20 mA output. The third output for the LXT-230 can only be a temperature output. 1.11 Optional Software To enhance the capability of the LXT-230, other software options are available. -
Page 6: Installation
Three typical installation configurations are available for the LXT-230 transmitter: universal mounting, handrail mounting, and panel mounting configurations. The universal mounting configuration allows the LXT-230 to be mounted on a wall or a 2” pipe stand. U-bolts may be ordered separately for pipe stand mounting. -
Page 7: Familiarization
Cursor positions or numeric adjustments are performed by pressing the appropriate keypad. The LXT-230 uses an "underline" cursor in each of the menus. Holding down the keypad will automatically scroll the cursor or numeric values. Please note that simultaneous pressure on both vertical keys or any combination of keys other than the two horizontal CALIBRATE keys is not recommended. -
Page 8: Main Menu
3.2.2 Main Menu This menu appears after the Copyright Display when power is first applied to the LXT-230. The Main Menu displays the measured process variable, temperature, and the current output in percent of full-scale. While in this menu, the current output can be adjusted and locked in a manual mode to provide an undisturbed output during buffer calibrations. -
Page 9: Output Calibration Menu
Second, the menu is used to change the units of display to either Celsius or Fahrenheit. The change is performed as a toggle function and changes the displayed units on all screens or menus where temperature is displayed to the desired unit of measurement. Model LXT-230 Instruction Manual / 9... -
Page 10: Sentinel Diagnostics
4.0 SENTINEL DIAGNOSTICS The basic menu structure of the LXT-230 transmitter is architecturally the same as the LXT- 230 pH, ORP and PION, with the only variable being the diagnostic information on the main and special diagnostic menus. The critical path to your process measurement is via the TAI sensor/electrode. - Page 11 DIAGNOSTIC engineering data can be obtained. There is also an option (at time of purchase) to add a 4-20mA output card for the transmission of this “INSITU” diagnostic engineering data. Model LXT-230 Instruction Manual / 11...
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Page 12: Maintenance
If the seal is damaged, replace the gasket. Always keep the gasket lightly lubricated with a silicone grease. 5.2 Replacement of the Microprocessor Contact factory. Model LXT-230 Instruction Manual / 12... -
Page 13: Calibration
3. Press the left-hand CALIBRATE key and observe the "M" disappear, releasing the LXT-230 from the manual output mode. The % output value will return to the real- time current output. -
Page 14: Two-Point Buffer Calibration (Span)
If a flashing asterisk appears during or after calibration, the electrode may require service, or the buffer solution may be contaminated. Refer to section 5.6 for details. NOTE: Comparing the millivolt values before and after the calibration provides a valuable Model LXT-230 Instruction Manual / 14... -
Page 15: Calibration Using A Grab Sample As A Standard
6.5 Calibration Using a Grab Sample as a Standard The LXT-230 allows easy standardization to a grab sample value by placing the process value into the first calibration point. Procedure: 1. -
Page 16: Temperature Calibration - Trim Adjustment
MENU SELECTION key. 6.9 Temperature Calibration - Trim Adjustment When the process demands a tighter tolerance than ±3ºC the LXT-230 allows adjustment, or trim, of the temperature compensation element. This adjustment only compensates for deviations in the RTD input (as a sensor input standardize or zero adjustment). - Page 17 4. To toggle back to the first unit of measurement, press the CALIBRATE keys again. Trim °C Trim °F Unit 25.0°C Unit 77.0°F Model LXT-230 Instruction Manual / 17...
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Page 18: Lxt-230 Model Number Designators
-100° to +200°C) Field selectable time average (2 to 32 seconds) Channel 3 Output TMP1 Only output available on this Typical Example channel. LXT-230-OR/MA-PM - LXT-230 transmitter for use with an ORP sensor. Mounting Hardware Model LXT-230 Instruction Manual / 18... -
Page 19: Troubleshooting Guide
Calibration Menu. Adjust trim trim. as required. The pH or ORP reading short The transmitter may have Check buffers to make sure spans. been mis-calibrated. they are the correct values. Use the Back-to-Factory calibration feature on the Model LXT-230 Instruction Manual / 19... - Page 20 Power to the transmitter Cycle power off for dropped below the minimum approximately 10 seconds, required voltage for a and then on again. fraction of a second (gray- out). Typically caused by a voltage transient. Model LXT-230 Instruction Manual / 20...
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Page 21: Appendix A - Specifications
NEMA 4X, weatherproof start-up. This will allow subsequent standardize and span buffer SHIPPING WEIGHT calibrations with only 2 keystrokes. Standard LXT-230: 2 lbs (0.91 kgs) Back-to-Factory Calibration (Factory ACCURACY Restart) ± 0.10% of full scale With 2 keystrokes, allows the technician... - Page 22 Allows for compensation for any differences in RTDs by programming the offset into the transmitter. Temperature Display Temperature can be field configured to display in OC or OF. Display Contrast Fully adjustable for ambient lighting conditions Model LXT-230 Instruction Manual / 22...