Emerson LTM-300 Field Insulation of Gages With Transmitters, Insulation Warning Label Supplied

5.If no float is present, or magnetic field is lost, HART Communicator will display “LEVEL SIGNAL LOST”

6.For calibration using HART, or to change range consult HART section of this manual.

Note: In service over 400 Deg F (204C) Gages and Transmitters should be properly insulated with transmitter OUTSIDE the blanket.

Note: During the installation or calibration of the LTM-300 level transmitter, the technician should be very careful not to move the magnet perpendicular to the sensor tube as this could leave magnetic indentation in the sensor wire. The LTM-300 level transmitter has an inductor located inside the bulkhead of the sensor tube. During operation of the transmitter, this inductor emits a magnetic filed as current passes through the sensor wire. If an external magnet or the float comes in contact with the bulkhead, this can cause temporary magnetization of the coil, which means the coil is biased. In other words, the phase is reversed. If this occurs, the inductor should quickly recover. It may be manually reversed or de-magnetized very simply by “swiping” a magnet parallel to the bulkhead in an arching motion.

SECTION 7. Field Insulation of Gages

with Transmitters

7.0 Field Insulation

We strongly recommend that experienced MagTech personnel do any insulation of the magnetic level gages with externally mounted transmitters.

If Cryogenic “Hard Skin” cold service type insulation is required, it MUST be done at the factory due to the custom “TUBE in TUBE: design necessary for removal of the transmitter if needed.

If insulation is going to be done in the field, then the following guidelines MUST be followed:

1.Flexible type insulation jackets (NOT HARD SKIN) are required and must be installed around the Mag-Gage chamber only. DO NOT cover the LTM 300 transmitter tube, as this may burn up the sensor and possibly the electronics.

2.After the insulation jacket is installed, the LTM 300 sensor tube must be re-mounted at its factory-preset distance from the Mag-Gage chamber and must be parallel to the chamber as well. (Small cut-outs in the jacket are required to re-attach the transmitter properly).

3.Make sure the 4mA markings on the sensor tube are re-aligned at the centers of the process connections.

7.1 Insulation Warning Label Supplied

----------WARNING---------

(When Insulating Gages)

MagTech Level Transmitters have a maximum operating temperature of 300°F. When insulating a Mag Gage and transmitter assembly in HOT service, keep the transmitter OUTSIDE the insulating material. Special blankets for this type of insulation are available from MagTech. For further information consult the factory. 1-800-221-3653

SECTION 8. Warranty and HART Protocol

8.0 Warranty

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 replace at its discretion those products that fail to perform as specified, with the following exceptions:

1.Products repaired or modified by persons that are not authorized by MagTech.

2.Products subjected to misuse, negligence or accidents.

3.Products that are connected, installed, or otherwise used in such a way not in strict accordance with manufacturer’s instructions.

This warranty is in lieu of any other warranty expressed or implied by any party other than MagTech. Repairs and/or replacements shall be at the sole discretion of MagTech based on the terms and conditions of this warranty. Defective products shall be returned to the factory prepaid by the buyer after obtaining a Return Authorization Number from MagTech. All warranty repairs or replacements will be preformed at the factory in Houston. Surface return freight will be paid by MagTech. Factory warranties do not include field service. Field service warranty repairs will be at

the buyer’s expense. Consult MagTech for field service rates.

Any modifications to terms and conditions of this warranty will not be binding unless made in writing and signed by an authorized agent or official of MagTech.

NOTE: ALL MAGTECH GAGES SHOULD BE UNPACKED AND THOROUGHLY INSPECTED UPON RECEIPT. GAGES ARE SHIPPED FOB FACTORY AND ARE FULLY PROTECTED AGAINST DAMAGE OR LOSS DURING SHIPMENT. ANY CLAIMS FOR PARTS DAMAGED DURING SHIPMENT SHOULD BE SUBMITTED WITHIN 15 DAYS OF RECEIPT OF GOODS BY CUSTOMER.

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