Instruction/ maintenance manual of the product 350 Emerson
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3902 Magnolia Rd. Pea rland, Texas 77584 Phone: 281-488-0788 Fax: 281-488-7080 E-mail: magtech @isemagtech.com Website: www.i semagtech.co m LTM – Series Models: LTM-250 and LTM- 350 Magnetostrictive Level Transmitters Instructions & Operation Manual LTM-350_IOM Rev.
Table of Contents Section 1: Warran ty .......... ..... .......... ..... ..... .......... ..... ..... ..... .......... ..... ..... ..... .......... ..... ..... ..... .......... ..... ..... ..... 1 1.0 Warranty..................... ....................
Table of Contents Section 8: Transmitter Calibration and Troubleshoo ting ..... ..... ..... ..... .......... ..... ..... ..... .......... ..... ..... ..... .......... 28 8.0 Calibration ...................... ...................... ...................
Section 1 Warranty 1.0 Warranty All Magtech product s are warranted against def ects in materials and workmanship for a period of no less than one year from the date of shipment. Th e level gage chamber and process connections are guaranteed for the life of th e tank or vessel to which it is attached.
Section 2 Transmitter Overview 2.0 General Description The LTM-Series are 2-wire electronic field instruments, suitable for installation in hazardous and non-hazardous locations. Tes ting and certification has been obtained fro m different agencies for installa tion in such areas.
2.3 Gage Mounted Transmitter The LTM-Series may be strap ped to the outside of the Magtech LG series mag netic level gage. In such an installation, it is used as an accessory transmit ter for the visual le vel gage.
A stilling well ma y be used along with the transmitter insid e the tank. Stilling-well is a pipe external to the sens or probe and float encasing the entire assembly pr otecting it from surface agitation or from physical damage du e to the length of the sensor probe.
Section 3 Transmitter Description 3.0 Detailed Description The LTM-Series is an ass embly of two major components: The Sensor Tube Assembly : This is a 5/8” diamet er stainless steel probe , sealed on one end, with the magnetostrictive waveguide in its center.
A high-speed microcontroller is util ized in the design to process and calculate the elapsed time measurement. Accurate crystals are used for the time based to res olve sub-microsecond timing increments.
Section 4 Installation 4.0 Gage Mount Installation The LTM-Series can be mounted to the side of a Magtech LG series level gage usin g special mounting brackets and stainles s steel hose clamps.
2. Identify Proper O rientation of Transmitter: There are a few possible orientations of the LTM Series transmitters, th ey are: Figure 9. Possible t ransmitter configurati ons Transmitter A is a standard top mount configuration. Transmitter B is a top mou nt with elbow, usually utilized when there ar e temperature or head room issues.
4. Remote Moun t Electronics Option. Due to process temperature, vibration or accessibility the housing/electronic s of the LTM transmitter can be remote mounted as far as 25 ft. The housing/electronics are sup plied with a pipe- mount bracket that can be mount ed most nearby posts or pipes with hose clamps.
4.3 Insulation (against extreme heat/cold) Magtech strongly r ecommends that an experienced Magtech Technician do insula tion of the magnetic level gages at the factory with externally mounted transmitters.
Section 5 Field Wiring 5.0 Recommended Loop Wiring The following is the recommended loop wiring. Figure 13. Recommended Lo op Wiring 11.
The following is the Hart Topology. Figure 14. HART Loop Topol ogy Please visit www.hartcomm2. org to learn more about HART Pr otocol. 12.
5.1 Area Classification Installation Safety If the instrument is used as an explosion proof (exp) device then exp conduit mus t be sealed within 18 inches of the termination point – at the instrument.
Section 6 Transmitter Specifications 6.1 Hazardous Locations / General Ratings CSA and CSAUS: Exp losion Proof: Class I Div. 1 or 2, Grps. B, C, D Class II, Grps.
Section 7 Menu Structure and Features 7.0 Pushbutton Ope ration The menu structure and pushb utton operation of the LTM series trans mitters is si mple and user-friendly. The electronics module has 3 push buttons (from left to right): ↑ : This button is us ed to increment values and chang e “Yes” to “No” and “No” to “Yes”.
7.1 Menu Structure Main Screen (scrolling): The menu structure has been designed so the end user can make parameter changes relati vely fast and easy. Below is a detail ed description of these menus. The LTM-250/350 LCD is a 2x8 character s creen. The main scr een scrolls between the following parameters: 1.
The following is the LTM-250/350 LCD Menu Flow chart Magtech Magtech LTM-250 or LTM-350 SW Rev 1.00.00 HW Rev 1.00.00 Display? Scroll > Level > Intrface* > Temp** > mA Out > % Range SelLngth 30.
7.1 Menu Structure Cont inued… Description Manufa cturer and Model: Software Revision Status: This is the current software revisi on. Hardware Revision Status: This is the current hardware re vision.
7.1 Menu Structure Cont inued… Description Select PV: This menu allows th e user to select the measurement that controls the trans mitter’s current output (mA). This menu only appears if the interface (2 floats) option is provided . Select Alarm: The following alarm settings can be chosen: “FailHigh” = 21.
7.1 Menu Structure Cont inued… Description Rate of Change (Ro C) Filter: This parameter helps ignor e erroneous readings from the transmitt er’s surroundings. If the user knows how fast the level can change in the vessel (i.e. inches per second) then this p arameter should be set at a rate that the level in the vessel cannot suddenly jump to.
7.1 Menu Structure Continued… Description Trim Digital-Analog-Converter (DAC): These are factory s et parameters used to provide an accurate 4.000mA and 20.
7.2 Features This section will des cribe in more detail some of the LCD Menus and new featu res exclusive to models LTM-250/350. Scrolling Option: When choosing n ot to scroll the main menu the follo wing options can be chosen by pressing the up and down push buttons (exclusively for models LTM-25 0/350) .
7.2 Features (Exclusiv e to the LTM-250/350 models) There is an “advance” m enu incorporated into the LTM-250 /350 models. To access this m enu press and hold the increment ( ↑) button first th en while holdin g the increment button press and h old the enter button for 3 seconds.
7.2 Features (Exclusiv e to the LTM-250/350 models) This section describes the “advance” menus in detail. ComPort: This menu is currently only utiliz ed at the factory and will not assist in any troubleshootin g. When the menu first appears the “No” option is defaulted, si mply press enter to bypass this option.
7.2 Features (Exclusiv e to the LTM-250/350 models) Please consult factor y before attempting this procedu re. Document transmitter’s serial nu mber for better assistance. 1-point Calibration Procedure (1pt Cal): The following menu is the 1 –point Calibration pr ocedure.
7.2 Features (Exclusiv e to the LTM-250/350 models) Field Reversible Transmitter (FlipPrb): An important and key feature of the LTM-250 and LTM-350 Models is the ability to flip (r otate) the entire transmitter 18 0 degrees. This procedure is only for gage mount transmitters with an elbow connection on them.
7.2 Features (Exclusiv e to the LTM-250/350 models) Change Signal (ChngSgnl): The next and fin al menu in the special features menu is “ChngSgnl” or change signal option. The feature allows the adjustment of the signal being sent down the sens or probe.
Section 8 Transmitter Calibration and LTM Troubleshooting 8.0 Calibration There really is no need to re -calibrate this instrument. The L TM-Series arrive calibrated to specified measuring ranges at o rder placement. If the need arises and a recal ibration is deemed necessary please f ollow these instructions carefull y.
2. Water damage to the elect ronics module or sensor probe. This is potentially the most severe case the symptoms are unpredictable. If there is any suspici on that the transmitter may have incurred water damag e please contact the factory to make arrang ements to have the unit sent back for factor y inspection.
Section 9 LTM-350 has HART Protocol 9.0 Hart Protocol: Ge neral Information The LTM-350 is a HART regi stered and certified instrument. The section presents how the HAR T Communication Protocol has been u tilized in the LTM-350. This se ction does not explain what HART Protoc ol is, please visit www.
9.0 Hart Protocol: Menus and Flowchart (continued…) Basic Setup>>>>>>> > Level Setup>>>>>>>>>> > Keypad Rerange>>>>>>>&g.
9.0 Hart Protocol: Menus and Flowchart (continued…) HART Information>>>>>> > Manu facturer Model Unique ID Serial Number Date Sales Order Purchase Order Tag Long Tag Message Descriptor Revision #s>>>>>>>>>>>>>> >>> > Universal rev Fld dev rev Final asmbly num Note 1.
An important point after buying a device Emerson 350 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Emerson 350 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Emerson 350 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Emerson 350 you will learn all the available features of the product, as well as information on its operation. The information that you get Emerson 350 will certainly help you make a decision on the purchase.
If you already are a holder of Emerson 350, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Emerson 350.
However, one of the most important roles played by the user manual is to help in solving problems with Emerson 350. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Emerson 350 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
