Emerson Magnetostrictive Level Transmitter 250 user manual

User manual for the device Emerson Magnetostrictive Level Transmitter 250

Device: Emerson Magnetostrictive Level Transmitter 250
Category: Laser Level
Manufacturer: Emerson
Size: 0.66 MB
Added : 9/21/2013
Number of pages: 35
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Summary of the content on the page No. 1


3902 Magnolia Rd.
Pearland, Texas 77584
Phone: 281-488-0788

Summary of the content on the page No. 2

Table of Contents Section 1: Warranty .......................................................................................................................................1 1.0 Warranty.......................................................................................................................................................... 1 Section 2: Transmitter Overview ...................................................................................................................2

Summary of the content on the page No. 3

Table of Contents Section 8: Transmitter Calibration and Troubleshooting................................................................................28 8.0 Calibration ..................................................................................................................................................... 28 8.1 Troubleshooting ............................................................................................................................................ 28

Summary of the content on the page No. 4

Section Warranty 1 1.0 Warranty All Magtech products are warranted against defects All Magtech gages and transmitters should in materials and workmanship for a period of no be unpacked and thoroughly inspected upon less than one year from the date of shipment. The receipt. Gages are shipped FOB factory and level gage chamber and process connections are are fully protected against damage or loss guaranteed for the life of the tank or vessel to during shipment. Any claims for parts w

Summary of the content on the page No. 5

Section Transmitter Overview 2 2.0 General Description BBBB = The overall probe length of the instrument. The LTM-Series are 2-wire electronic field Note: THIS IS NOT THE MEASURING RANGE. instruments, suitable for installation in hazardous and non-hazardous locations. Testing and XXXX = The measuring range of the instrument. certification has been obtained from different The 0 and 100% (4/20mA) output range. agencies for installation in such areas. This YYYY = The end user specified t

Summary of the content on the page No. 6

2.3 Gage Mounted Transmitter 2.4 Standalone Transmitter The LTM-Series may be strapped to the outside of When a magnetic level gage is not present, the LTM the Magtech LG series magnetic level gage. In such can be inserted into the tank/vessel with its own an installation, it is used as an accessory transmitter float mounted around the sensor tube. for the visual level gage. The same float used to activate the magnetic gage is also used to activate The depictions below show the standalone ve

Summary of the content on the page No. 7

A stilling well may be used along with the Optional Features that are available with the transmitter inside the tank. Stilling-well is a pipe LTM-350 but NOT the LTM-250 are: external to the sensor probe and float encasing the 1. HART Protocol, which enables: entire assembly protecting it from surface agitation or from physical damage due to the length of the a. A second digital output proportional to sensor probe. A depiction of a transmitter with a an interface level (requires a seco

Summary of the content on the page No. 8

Section Transmitter Description 3 3.0 Detailed Description In a brief description, the magnetostrictive principle The LTM-Series is an assembly of two major consists of a wire extruded and heat treated under components: carefully chosen conditions to retain desired magnetic properties, which is pulsed by a circuit The Sensor Tube Assembly: This is a 5/8” diameter with a relatively high current pulse. The high stainless steel probe, sealed on one end, with the current pulse produces a cir

Summary of the content on the page No. 9

A high-speed microcontroller is utilized in the design to process and calculate the elapsed time LTM-350, via HART protocol only. measurement. Accurate crystals are used for the time based to resolve sub-microsecond timing increments. The binary number, equivalent to the 2. Primary Level and Interface Level – A second microseconds of the echo travel time is used to float may be added below the first, and the calculate the distance of the float and a second output will be calibrated au

Summary of the content on the page No. 10

Section Installation 4 4.0 Gage Mount Installation The LTM-Series can be mounted to the side of a transmitters, can be removed to allow the float to Magtech LG series level gage using special mounting slide off the sensor tube. brackets and stainless steel hose clamps. When mounting the transmitter to an LG series gage the 4.2 General Installation Guidelines active sensor region of the probe should fall within the centerline of the process connections on the The basic steps to installing t

Summary of the content on the page No. 11

2. Identify Proper Orientation of Transmitter: There are a few possible orientations of the LTM Series transmitters, they are: Do not over tighten the clamps because they will bend and distort. Figure 10. Top view of mounting clamps and sensor probe Figure 9. Possible transmitter configurations A: Is the correct way to have clamps tightened. Transmitter A is a standard top mount The clamps do not have to meet. configuration. Transmitter B is a top mount with elbow, usually utilized w

Summary of the content on the page No. 12

4. Remote Mount Electronics Option. Due to process temperature, vibration or accessibility the housing/electronics of the LTM transmitter There are a variety of ways to install a can be remote mounted as far as 25 ft. The standalone transmitters (i.e. crane, lift, etc…), housing/electronics are supplied with a pipe- the basic rule to remember when installing an mount bracket that can be mounted most LTM transmitter is DO NOT DAMAGE the nearby posts or pipes with hose clamps. The sen

Summary of the content on the page No. 13

4.3 Insulation (against extreme heat/cold) Magtech strongly recommends that an experienced (When insulating gages): Magtech Technician do insulation of the magnetic Magtech level transmitters have a maximum level gages at the factory with externally mounted operating temperature of 300 F. When insulating a transmitters. mag-gage and transmitter assembly in HOT service, keep the transmitter OUTSIDE the insulating material. Special blankets for this type of insulation If Cryogenic “Hard

Summary of the content on the page No. 14

Section Field Wiring 5 5.0 Recommended Loop Wiring The following is the recommended loop wiring. Figure 13. Recommended Loop Wiring 11

Summary of the content on the page No. 15

The following is the Hart Topology. Figure 14. HART Loop Topology Please visit www.hartcomm2.org to learn more about HART Protocol. 12

Summary of the content on the page No. 16

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 atmospheres, disconnect the device from the supply circuit, or area must be known to be non-hazardous, before opening. 13

Summary of the content on the page No. 17

Section Transmitter Specifications 6 6.1 Hazardous Locations / 6.2 Electronic Specifications General Ratings Supply Voltage: 13 – 36 Vdc (13V @ 20mA) CSA and CSAUS: Explosion Proof: Repeatability: .005% of full scale or Class I Div. 1 or 2, Grps. B, C, D .010”, whichever is greater Class II, Grps. E, F, G

Summary of the content on the page No. 18

Section Menu Structure and Features 7 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” and “No” to “Yes”. ↓ : This button is used to decrement values and change “Yes” to “No” and “No” to “Yes”. ← : This is the enter button used to execute functions and enter/exit into or out of subme

Summary of the content on the page No. 19

7.1 Menu Structure Main Screen (scrolling): The menu structure has been designed so the end user can make parameter changes relatively fast and easy. Below is a detailed description of these menus. The LTM-250/350 LCD is a 2x8 character screen. The main screen scrolls between the following parameters: 1. Level (in selected engineering units) 2. Interface (when option is provided – in selected engineering units)-LTM-350 only 3. Temperature (when option is provided – in selected engineering un

Summary of the content on the page No. 20

The following is the LTM-250/350 LCD Menu Flowchart 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 30.00 in Lvl Unit in > ft > mm > cm > m Temp Unit** C > F > R > K Sel PV* Level > Interface Sel Alrm FailHigh > FailLow > HoldOut ChgRnge? >>> Sel LRV >>> Sel URV Yes > No (yes) 0.00 in 24.00 in SelDamp 1 sec ROC Fltr 10.0in/s TrmSnsr? >>> TrimZero >>> TrimZero >>> TrimSpan


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