Page 2 - Table of Contents
Table of Contents Section 1: Warranty ....................................................................................................................................... 1 1.0 Warranty...................................................................................................................
Page 3 - Warning/Caution Valuable Operation Information
Table of Contents Section 8: Transmitter Calibration and Troubleshooting ................................................................................ 28 8.0 Calibration ..................................................................................................................................
Page 4 - Section; Warranty
Section 1 Warranty 1.0 Warranty All Magtech products are warranted against defects in materials and workmanship for a period of no less than one year from the date of shipment. The level gage chamber and process connections are guaranteed for the life of the tank or vessel to which it is attached. F...
Page 5 - Transmitter Overview; General Description
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. Testing and certification has been obtained from different agencies for installation in such areas. This instrument is de...
Page 6 - Gage Mounted Transmitter; Standalone Transmitter
2.3 Gage Mounted Transmitter The LTM-Series may be strapped to the outside of the Magtech LG series magnetic level gage. In such an installation, it is used as an accessory transmitter for the visual level gage. The same float used to activate the magnetic gage is also used to activate the magnetost...
Page 7 - Stilling wells are; A dual output transmitter is also available
A stilling well may be used along with the transmitter inside the tank. Stilling-well is a pipe external to the sensor probe and float encasing the entire assembly protecting it from surface agitation or from physical damage due to the length of the sensor probe. A depiction of a transmitter with a ...
Page 8 - Transmitter Description; Detailed Description; The Sensor Tube Assembly:; Technology – Theory of Operation
Section 3 Transmitter Description 3.0 Detailed Description The LTM-Series is an assembly of two major components: The Sensor Tube Assembly: This is a 5/8” diameter stainless steel probe, sealed on one end, with the magnetostrictive waveguide in its center. In addition to the magnetostrictive wavegui...
Page 10 - Installation; Gage Mount Installation; Calibration of the probe is factory set to the; Standalone Installation; The sensor probe of the transmitter
Section 4 Installation 4.0 Gage Mount Installation The LTM-Series can be mounted to the side of a Magtech LG series level gage using special mounting brackets and stainless steel hose clamps. When mounting the transmitter to an LG series gage the active sensor region of the probe should fall within ...
Page 14 - Field Wiring; Recommended Loop Wiring; The following is the recommended loop wiring.
Section 5 Field Wiring 5.0 Recommended Loop Wiring The following is the recommended loop wiring. Figure 13. Recommended Loop Wiring 11
Page 15 - The following is the Hart Topology.; Please visit
The following is the Hart Topology. Figure 14. HART Loop Topology Please visit www.hartcomm2.org to learn more about HART Protocol. 12
Page 16 - Area Classification Installation Safety; inches of the termination point – at the instrument.
5.1 Area Classification Installation Safety If the instrument is used as an explosion proof (exp) device then exp conduit must be sealed within 18 inches of the termination point – at the instrument. Power must be supplied by an isolated supply. Caution-To reduce the risk of ignition of hazardous at...
Page 17 - Transmitter Specifications; General Ratings; Electronic Specifications; Operating Temperature:
Section 6 Transmitter Specifications 6.1 Hazardous Locations / General Ratings CSA and CSAUS: Explosion Proof: Class I Div. 1 or 2, Grps. B, C, D Class II, Grps. E, F, G Class III T amb -40°C to 85°C (-40°F to 185°F) ATEX: Ex d: Sira 10ATEX1308X Ex d IIC T5 Gb Ex tb IIIC T100°C IP66 Db T amb -40°C t...
Page 18 - Menu Structure and Features; Pushbutton Operation; The pushbuttons are timed; not; pressurized. It does not matter how hard/firm you press them. The
Section 7 Menu Structure and Features 7.0 Pushbutton Operation The menu structure and pushbutton operation of the LTM series transmitters is simple and user-friendly. The electronics module has 3 pushbuttons (from left to right): ↑ : This button is used to increment values and change “Yes” to “No” a...
Page 20 - The following is the LTM-250/350 LCD Menu Flowchart
The following is the LTM-250/350 LCD Menu Flowchart Magtech Magtech LTM-250 or LTM-350 SW Rev1.00.00 HW Rev 1.00.00 Display?Scroll > Level > Intrface* > Temp** > mA Out > % Range SelLngth30.00 in Lvl Unit in > ft > mm > cm > m Temp Unit**C > F > R > K Sel PV*Level...
Page 21 - Menu Structure Continued...
7.1 Menu Structure Continued… Description Manufacturer and Model: Software Revision Status: This is the current software revision. Hardware Revision Status: This is the current hardware revision. Scrolling Option: Allows the user to stop the main menu from scrolling and choose 1 of 5 possible parame...
Page 24 - Menu Structure Continued...; Description
7.1 Menu Structure Continued… Description Trim Digital-Analog-Converter (DAC): These are factory set parameters used to provide an accurate 4.000mA and 20.000mA. This parameter should not be changed as Magtech uses NIST traceable equipment to calibrate our transmitters and only accredited laboratori...
Page 27 - Loading Factory Defaults:
7.2 Features (Exclusive to the LTM-250/350 models) This section describes the “advance” menus in detail. ComPort: This menu is currently only utilized at the factory and will not assist in any troubleshooting. When the menu first appears the “No” option is defaulted, simply press enter to bypass thi...
Page 29 - ↑) button then while holding the increment button
7.2 Features (Exclusive 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 (rotate) the entire transmitter 180 degrees. This procedure is only for gage mount transmitters with an elbow connection on...
Page 30 - parameters have been drastically changed.; Conversion from Gage Mount to Standalone:; When converting from a gage mount transmitter to a; Converting from gage mount to standalone:; Remove the transmitter from the gage, then remove; Converting from standalone to gage mount:; Remove the transmitter from the vessel, then remove
7.2 Features (Exclusive to the LTM-250/350 models) Change Signal (ChngSgnl): The next and final menu in the special features menu is “ChngSgnl” or change signal option. The feature allows the adjustment of the signal being sent down the sensor probe. It can be utilized when one electronics module is...
Page 31 - Transmitter Calibration and
Section 8 Transmitter Calibration and LTM Troubleshooting 8.0 Calibration There really is no need to re-calibrate this instrument. The LTM-Series arrive calibrated to specified measuring ranges at order placement. If the need arises and a recalibration is deemed necessary please follow these instruc...
Page 33 - LTM-350 has HART Protocol; HART Menu Flowchart for LTM350 Transmitter
Section 9 LTM-350 has HART Protocol 9.0 Hart Protocol: General Information The LTM-350 is a HART registered and certified instrument. The section presents how the HART Communication Protocol has been utilized in the LTM-350. This section does not explain what HART Protocol is, please visit www.hartc...