Page 2 - Table of Contents
LTM-300 Magnetostrictive Level Transmitter Instruction and Maintenance Manual Table of Contents Section 1. Transmitter Overview Page 1.0 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 Level Transmitter. . . . . . . . . . . . . . . . . . . . ...
Page 3 - SECTION 1. Transmitter Overview; Gage Mounted Transmitter
The LTM-300 is an electronic field instrument, suitable for installation i n h a z a rd o u s a n d n o n - h a z a rd o u s i n d u s t r i a l a re a s. Te s t i n g a n d certification has been obtained from different agencies for installation in specific areas. This instrument is a two wire, loop po...
Page 4 - SECTION 2. Instrument Description; Basic Level Transmitter Simplified Block Diagram
The LTM-300 is an assembly of two major components: • The Sensor Tube Assembly. This a 5/8” diameter stainless steel probe, sealed on one end, with the magnetostrictive waveguide in its center. In addition to the magnetostrictive waveguide, the tube also houses the optional temperature sensor and th...
Page 5 - SECTION 3. Installation and Wiring
Level/Interface. A second float may be added below the first one, and the second output will be calibrated automatically. The second time interval is measured in the same manner as the first and added to the first to derive the position of the heavier float. The same six inch dead zone applies to the mea...
Page 6 - Range: 12” to 30 ft.; SECTION 5.0 Calibration
Ambient Temp. Range -20°C ... +40°C (-4°F ... 104°F) Humidity Limits: SAMA PMC 31.1-5.2 Vibration Limits: SAMA PMC 31.1-5.3 RFI Limits: SAMA PMC 31.1-20 to 1000 MHz up to 30V/m Material: 316ss standard, optional Hastalloy, Monel, Kynar coated Operating Temperature: -50 to 302°F (-50 to 150°C) Maximu...
Page 8 - NOTE: There is a top spring in the Mag-Gage to
6.4 Start-Up for Gage-Mounted LTM Transmitters If the transmitter does not appear to calibrate properly, or has an erratic output, check the deadband of the sensor tube and ensure that the float is within the active region of the probe. The active region of the sensor tube is typically marked with 20...
Page 9 - Transmitters should be properly insulated with; SECTION 8. Warranty and HART Protocol
All MagTech products are warranted against defects in materials and workmanship of one year from 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. Floats are guaranteed for two years. MagTech will repair or rep...
Page 10 - Diagnostics and Service; HART Communicator Overview; HART Protocol Option Information
When the HART Communicator is connected to the transmitter and turned on, the first screen that is seen by the user is the root menu screen. If the transmitter is configured as Level Only or Level plus Temperature, the screen to the left shows the information displayed to the user. However if the tran...
Page 14 - Zero Level Trim; calibration constant.; Full Level Trim
Starting at the Calibration screen, select the Zero Level Trim procedure. This procedure trims the Level digital value measurement at the position that the user desires to be the zero reference position. If the user selects Zero Level Trim from the Calibration screen, this screen will appear remindi...
Page 15 - Zero Temperature Trim
The HART Communicator now requests that the level float be set to the desired level upper trim point. The second trim point can be any other level point but it is recommended that this point be as far away from the zero point as possible. When the float is at this position, the transmitter will always...
Page 16 - Full Temperature Trim
The user is then notified that the loop may now be returned to automatic control. After the user presses OK the HART Communicator returns to the Calibration screen. The HART Communicator is now at the starting screen for the Zero Temper Trim . Full Temperature Trim Starting at the Calibration screen,...
Page 17 - Basic Setup Procedures; Reranging the Transmitter
The user is then notified that the loop may now be returned to automatic control. After the user presses OK the HART Communicator returns to the Calibration screen. The HART Communicator is now at the starting screen for the Full Temper Trim. Basic Setup Procedures If a transmitter has been configured...
Page 19 - Detailed Setup Selections
The next screen gives the user a choice to set the 4mA or 20mA values or to Exit the procedure. Here the user will select the 4mA menu position. The HART Communicator requests the user to set the Level (or Interface) to the position that is to provide the 4mA loop current output. When that has been ...
Page 20 - Probe Length; Level Off set
If the user selects Revision #’s from the Device information screen, the screen to the left will display the revisions of the transmitter. The bottom half of the list of Device information items is shown to the left. The menu entry Revision #’s will display the various revisions of the transmitter. ...